Patent Publication Number: US-2021173180-A1

Title: Wide-Angle Lens Assembly

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The invention relates to a wide-angle lens assembly. 
     Description of the Related Art 
     The current development trend of a wide-angle lens assembly is toward miniaturization and small F-number. Additionally, the wide-angle lens assembly is developed to have high resolution and resistance to environmental temperature change in accordance with different application requirements. However, the known wide-angle lens assembly can&#39;t satisfy such requirements. Therefore, the wide-angle lens assembly needs a new structure in order to meet the requirements of miniaturization, small F-number, high resolution, and resistance to environmental temperature change at the same time. 
     BRIEF SUMMARY OF THE INVENTION 
     The invention provides a wide-angle lens assembly to solve the above problems. The wide-angle lens assembly of the invention is provided with characteristics of a decreased total lens length, a decreased F-number, an increased resolution, a resisted environmental temperature change, and still has a good optical performance. 
     The wide-angle lens assembly in accordance with an exemplary embodiment of the invention includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is a meniscus lens with refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens is with refractive power. The third lens is with positive refractive power. The fourth lens is with refractive power. The fifth lens is a biconvex lens with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the object side to the image side along an optical axis. 
     In another exemplary embodiment, the wide-angle lens assembly further includes a sixth lens disposed between the first lens and the second lens, a seventh lens disposed between the object side and the first lens; an eighth lens disposed between the third lens and the fourth lens; and a stop disposed between the second lens and the eighth lens; wherein the second lens is with positive refractive power; wherein the third lens includes a convex surface facing the object side; wherein the fourth lens includes a concave surface facing the object side; wherein the sixth lens is with refractive power; wherein the seventh lens is with refractive power and includes a convex surface facing the object side; wherein the eighth lens is with positive refractive power; wherein the seventh lens, the first lens, the sixth lens, the second lens, the third lens, the eighth lens, the fourth lens, and the fifth lens are arranged in order from the object side to the image side along an optical axis; wherein the relative positions of the lenses are fixed; wherein the wide-angle lens assembly satisfies the following condition: 5.5&lt;TTL/f&lt;10; wherein TTL is an interval from an object side surface of the seventh lens to an image plane along the optical axis and f is an effective focal length of the wide-angle lens assembly. 
     In yet another exemplary embodiment, the eighth lens is cemented with the fourth lens. 
     In another exemplary embodiment, the wide-angle lens assembly further includes a ninth lens disposed between the fourth lens and the image side. 
     In yet another exemplary embodiment, the fifth lens is cemented with the ninth lens. 
     In another exemplary embodiment, the ninth lens is with negative refractive power and includes a concave surface facing the object side. 
     In yet another exemplary embodiment, the wide-angle lens assembly further includes a tenth lens disposed between the fourth lens and the image side. 
     In another exemplary embodiment, the tenth lens is with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. 
     In yet another exemplary embodiment, the second lens includes a convex surface facing the image side; the sixth lens is with negative refractive power and includes a concave surface facing the image side; the seventh lens is with positive refractive power. 
     In another exemplary embodiment, the seventh lens is with negative refractive power; the sixth lens is with positive refractive power; the sixth lens includes a concave surface facing the object side, or the fifth lens includes a concave surface facing the object side, or both the sixth lens and the fifth lens includes a concave surface facing the object side; the sixth lens includes a convex surface facing the image side, or the third lens includes a convex surface facing the image side, or both the sixth lens and the third lens includes a convex surface facing the image side; the second lens comprises a convex surface facing the object side and a concave surface facing the image side. 
     In yet another exemplary embodiment, the seventh lens further includes a concave surface facing the image side; the first lens is with negative refractive power, or the fourth lens is with negative refractive power, or both the first lens and the fourth lens are with negative refractive power; the third lens is with positive refractive power, or the fifth lens is with positive refractive power, or both the third lens and the fifth lens are with positive refractive power; the eighth lens includes a convex surface facing the object side and another convex surface facing the image side. 
     In another exemplary embodiment, the wide-angle lens assembly satisfies at least one of the following conditions: 1.3&lt;TTL/R 71 &lt;2.6; 0.03&lt;| f 71 /f 62 |&lt;1.7; 30&lt;Vd 7 &lt;64.3; 35&lt;Vd 1 &lt;54.5; wherein TTL is the interval from the object side surface of the seventh lens to the image plane along the optical axis, R 71  is a radius of curvature of the object side surface of the seventh lens, f 71  is an effective focal length of a combination of the seventh lens and the first lens, f 62  is an effective focal length of a combination of the sixth lens and the second lens, Vd 7  is an Abbe number of the seventh lens, and Vd 1  is an Abbe number of the first lens. 
     In yet another exemplary embodiment, the wide-angle lens assembly further includes a sixth lens disposed between the first lens and the second lens; a seventh lens disposed between the object side and the first lens; an eighth lens disposed between the third lens and the fourth lens; a ninth lens disposed between the fourth lens and the image side; wherein the second lens is with positive refractive power; wherein the third lens includes a convex surface facing the object side; wherein the fourth lens includes a concave surface facing the object side; wherein the sixth lens is with refractive power; wherein the seventh lens is with refractive power and includes a convex surface facing the object side; wherein the eighth lens is with positive refractive power; wherein the ninth lens is with negative refractive power and includes a concave surface facing the object side; wherein the seventh lens, the first lens, the sixth lens, the second lens, the third lens, the eighth lens, the fourth lens, the fifth lens, and the ninth lens are arranged in order from the object side to the image side along an optical axis; wherein the relative positions of the lenses are fixed. 
     In another exemplary embodiment, the first lens is with negative refractive power: the second lens includes a convex surface facing the object side; the third lens includes a convex surface facing the image side; the wide-angle lens assembly satisfies the following condition: 0.8≤|f 1 |/f≤1.5; wherein f 1  is an effective focal length of the first lens and f is an effective focal length of the wide-angle lens assembly. 
     In yet another exemplary embodiment, the wide-angle lens assembly satisfies the following condition: 0.4≤BFL/TTL≤0.5; wherein BFL is an interval from an image side surface of the fifth lens to an image plane along the optical axis and TTL is an interval from an object side surface of the first lens to the image plane along the optical axis. 
     In another exemplary embodiment, the wide-angle lens assembly further includes a sixth lens disposed between the first lens and the second lens, wherein the sixth lens is with negative refractive power and includes a concave surface facing the object side and another concave surface facing the image side. 
     In yet another exemplary embodiment, the first lens further includes a convex surface facing the object side; the second lens is with positive refractive power and further includes another convex surface facing the image side; the third lens is with positive refractive power and further includes another convex surface facing the object side; the fourth lens is with negative refractive power and includes a concave surface facing the object side and another concave surface facing the image side; the fifth lens further includes another convex surface facing the object side. 
     In another exemplary embodiment, the wide-angle lens assembly satisfies at least one of the following conditions: 1.1≤BFL/IH&lt;2.8; 4≤TTL/IH≤6.5; −0.93≤f 1 /f 5 ≤−0.68; wherein BFL is an interval from an image side surface of the fifth lens to an image plane along the optical axis, IH is a half image height of the image plane of the wide-angle lens assembly, TTL is an interval from an object side surface of the first lens to the image plane along the optical axis, f 1  is the effective focal length of the first lens, and f 5  is an effective focal length of the fifth lens. 
     In yet another exemplary embodiment, the wide-angle lens assembly further includes a stop disposed between the second lens and the third lens. 
     In another exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspheric plastic lenses. 
     In yet another exemplary embodiment, the wide-angle lens assembly further includes a reflective element disposed between the fifth lens and the image side. 
     In another exemplary embodiment, the wide-angle lens assembly further includes a sixth lens disposed between the first lens and the second lens, wherein the sixth lens is with negative refractive power and includes a convex surface facing the object side; the second lens includes a convex surface facing the image side; the wide-angle lens assembly satisfies the following condition: −8.3&lt;f 162 /f≤14; wherein f 162  is an effective focal length of a combination of the first lens, the sixth lens, and the second lens, and f is an effective focal length of the wide-angle lens assembly. 
     In yet another exemplary embodiment, the wide-angle lens assembly further includes a sixth lens disposed between the first lens and the second lens, wherein the sixth lens is with negative refractive power and includes a convex surface facing the object side; the second lens includes a convex surface facing the image side; the wide-angle lens assembly satisfies the following condition: 4 mm≤f+f 3 ≤5 mm; wherein f is an effective focal length of the wide-angle lens assembly and f 3  is an effective focal length of the third lens. 
     In another exemplary embodiment, the wide-angle lens assembly satisfies the following condition: −5.65 mm≤(R 21 ×R 22 )/(R 21 +R 22 )≤−3.8 mm: wherein R 21  is a radius of curvature of an object side surface of the second lens and R 22  is a radius of curvature of an image side surface of the second lens. 
     In yet another exemplary embodiment, the wide-angle lens assembly satisfies the following condition: 0.5&lt;|(CRA−MRA)/CRA|&lt;1.02; wherein CRA is a chief ray angle of a maximum image height of the wide-angle lens assembly and MRA is a marginal ray angle of the maximum image height of the wide-angle lens assembly. 
     In another exemplary embodiment, the first lens is with negative refractive power; the sixth lens further includes a concave surface facing the image side; the second lens is with negative refractive power and further includes a convex surface or a concave surface facing the object side; the third lens includes a convex surface facing the object side and another convex surface facing the image side; the fourth lens is with negative refractive power and includes a concave surface facing the object side and another concave surface facing the image side. 
     In yet another exemplary embodiment, the wide-angle lens assembly satisfies at least one of the following conditions: −45 degrees/mm≤FOV/f 1 ≤−22 degrees/mm; 105≤Vd 1 +Vd 3 &lt;140; wherein FOV is a field of view of the wide-angle lens assembly, f 1  is an effective focal length of the first lens, Vd 1  is an Abbe number of the first lens, and Vd 3  is an Abbe number of the third lens. 
     In another exemplary embodiment, the wide-angle lens assembly satisfies the following condition: −5.1≤(f 6 +f 4 )/f&lt;−3.6, wherein f is the effective focal length of the wide-angle lens assembly, f 6  is an effective focal length of the sixth lens, and f 4  is an effective focal length of the fourth lens. 
     In yet another exemplary embodiment, the wide-angle lens assembly satisfies at least one of the following conditions: 0.12≤BFL/TTL≤0.23; 9≤TTL/T 3 ≤19; wherein BFL is an interval from an image side surface of a lens which is closest to the image side to an image plane along the optical axis, TTL is an interval from an object side surface of the first lens to the image plane along the optical axis, and T 3  is a thickness of the third lens along the optical axis. 
     In another exemplary embodiment, the wide-angle lens assembly further includes a seventh lens disposed between the fifth lens and the image side, wherein the seventh lens is with positive refractive power and includes a concave surface facing the object side and a convex surface facing the image side. 
     In yet another exemplary embodiment, the wide-angle lens assembly further includes a seventh lens disposed between the fifth lens and the image side, wherein the seventh lens is with negative refractive power and includes a concave surface facing the object side and another concave surface facing the image side. 
     A detailed description is given in the following embodiments with reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: 
         FIG. 1  is a lens layout diagram of a wide-angle lens assembly in accordance with a first embodiment of the invention; 
         FIG. 2A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 2B  is a distortion diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 2C  is a lateral color diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 2D  is a relative illumination diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 2E  is a spot diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 2F  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 2G  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the first embodiment of the invention; 
         FIG. 3  is a lens layout diagram of a wide-angle lens assembly in accordance with a second embodiment of the invention; 
         FIG. 4A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 4B  is a distortion diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 4C  is a lateral color diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 4D  is a relative illumination diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 4E  is a spot diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 4F  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 4G  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the second embodiment of the invention; 
         FIG. 5  is a lens layout diagram of a wide-angle lens assembly in accordance with a third embodiment of the invention; 
         FIG. 6A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 6B  is a distortion diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 6C  is a lateral color diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 6D  is a relative illumination diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 6E  is a spot diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 6F  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 6G  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the third embodiment of the invention; 
         FIG. 7  is a lens layout diagram of a wide-angle lens assembly in accordance with a fourth embodiment of the invention; 
         FIG. 8A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 8B  is a distortion diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 8C  is a lateral color diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 8D  is a relative illumination diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 8E  is a spot diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 8F  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 8G  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the fourth embodiment of the invention; 
         FIG. 9  is a lens layout diagram of a wide-angle lens assembly in accordance with a fifth embodiment of the invention; 
         FIG. 10A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 10B  is a distortion diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 10C  is a lateral color diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 10D  is a relative illumination diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 10E  is a spot diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 10F  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 10G  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the fifth embodiment of the invention; 
         FIG. 11  is a lens layout diagram of a wide-angle lens assembly in accordance with a sixth embodiment of the invention; 
         FIG. 12A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 12B  is a distortion diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 12C  is a lateral color diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 12D  is a relative illumination diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 12E  is a spot diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 12F  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 12G  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the sixth embodiment of the invention; 
         FIG. 13  is a lens layout diagram of a wide-angle lens assembly in accordance with a seventh embodiment of the invention; 
         FIG. 14A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the seventh embodiment of the invention; 
         FIG. 14B  is a field curvature diagram of the wide-angle lens assembly in accordance with the seventh embodiment of the invention; 
         FIG. 14C  is a distortion diagram of the wide-angle lens assembly in accordance with the seventh embodiment of the invention; 
         FIG. 14D  is a lateral color diagram of the wide-angle lens assembly in accordance with the seventh embodiment of the invention; 
         FIG. 14E  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the seventh embodiment of the invention; 
         FIG. 15  is a lens layout diagram of a wide-angle lens assembly in accordance with an eighth embodiment of the invention; 
         FIG. 16A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the eighth embodiment of the invention; 
         FIG. 16B  is a field curvature diagram of the wide-angle lens assembly in accordance with the eighth embodiment of the invention; 
         FIG. 16C  is a distortion diagram of the wide-angle lens assembly in accordance with the eighth embodiment of the invention; 
         FIG. 16D  is a lateral color diagram of the wide-angle lens assembly in accordance with the eighth embodiment of the invention; 
         FIG. 16E  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the eighth embodiment of the invention; 
         FIG. 17  is a lens layout diagram of a wide-angle lens assembly in accordance with a ninth embodiment of the invention; 
         FIG. 18A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the ninth embodiment of the invention; 
         FIG. 18B  is a field curvature diagram of the wide-angle lens assembly in accordance with the ninth embodiment of the invention; 
         FIG. 18C  is a distortion diagram of the wide-angle lens assembly in accordance with the ninth embodiment of the invention; 
         FIG. 18D  is a lateral color diagram of the wide-angle lens assembly in accordance with the ninth embodiment of the invention; 
         FIG. 18E  is a modulation transfer function diagram of the wide-angle lens assembly in accordance with the ninth embodiment of the invention; 
         FIG. 19  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a tenth embodiment of the invention; 
         FIG. 20A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the tenth embodiment of the invention; 
         FIG. 20B  is a distortion diagram of the wide-angle lens assembly in accordance with the tenth embodiment of the invention; 
         FIG. 20C  is a spot diagram of the wide-angle lens assembly in accordance with the tenth embodiment of the invention; 
         FIG. 20D  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the tenth embodiment of the invention; 
         FIG. 21  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a eleventh embodiment of the invention; 
         FIG. 22A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the eleventh embodiment of the invention; 
         FIG. 22B  is a distortion diagram of the wide-angle lens assembly in accordance with the eleventh embodiment of the invention; 
         FIG. 22C  is a spot diagram of the wide-angle lens assembly in accordance with the eleventh embodiment of the invention; 
         FIG. 22D  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the eleventh embodiment of the invention; 
         FIG. 23  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a twelfth embodiment of the invention; 
         FIG. 24A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the twelfth embodiment of the invention; 
         FIG. 24B  is a distortion diagram of the wide-angle lens assembly in accordance with the twelfth embodiment of the invention; 
         FIG. 24C  is a spot diagram of the wide-angle lens assembly in accordance with the twelfth embodiment of the invention; 
         FIG. 24D  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the twelfth embodiment of the invention: 
         FIG. 25  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a thirteenth embodiment of the invention; 
         FIG. 26A  depicts a field curvature diagram of the wide-angle lens assembly in accordance with the thirteenth embodiment of the invention; 
         FIG. 26B  is a distortion diagram of the wide-angle lens assembly in accordance with the thirteenth embodiment of the invention; 
         FIG. 26C  is a spot diagram of the wide-angle lens assembly in accordance with the thirteenth embodiment of the invention; 
         FIG. 26D  is a through focus modulation transfer function diagram of the wide-angle lens assembly in accordance with the thirteenth embodiment of the invention: 
         FIG. 27  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a eighteenth embodiment of the invention; 
         FIG. 28A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the eighteenth embodiment of the invention; 
         FIG. 28B  is a field curvature diagram of the wide-angle lens assembly in accordance with the eighteenth embodiment of the invention; 
         FIG. 28C  is a distortion diagram of the wide-angle lens assembly in accordance with the eighteenth embodiment of the invention; 
         FIG. 29  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a nineteenth embodiment of the invention; 
         FIG. 30A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the nineteenth embodiment of the invention; 
         FIG. 30B  is a field curvature diagram of the wide-angle lens assembly in accordance with the nineteenth embodiment of the invention; 
         FIG. 30C  is a distortion diagram of the wide-angle lens assembly in accordance with the nineteenth embodiment of the invention; 
         FIG. 31  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a twentieth embodiment of the invention; 
         FIG. 32A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the twentieth embodiment of the invention; 
         FIG. 32B  is a field curvature diagram of the wide-angle lens assembly in accordance with the twentieth embodiment of the invention; 
         FIG. 32C  is a distortion diagram of the wide-angle lens assembly in accordance with the twentieth embodiment of the invention; 
         FIG. 33  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a twenty-first embodiment of the invention; 
         FIG. 34A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the twenty-first embodiment of the invention; 
         FIG. 34B  is a field curvature diagram of the wide-angle lens assembly in accordance with the twenty-first embodiment of the invention; 
         FIG. 34C  is a distortion diagram of the wide-angle lens assembly in accordance with the twenty-first embodiment of the invention; 
         FIG. 35  is a lens layout and optical path diagram of a wide-angle lens assembly in accordance with a twenty-second embodiment of the invention; 
         FIG. 36A  depicts a longitudinal aberration diagram of the wide-angle lens assembly in accordance with the twenty-second embodiment of the invention; 
         FIG. 36B  is a field curvature diagram of the wide-angle lens assembly in accordance with the twenty-second embodiment of the invention; and 
         FIG. 36C  is a distortion diagram of the wide-angle lens assembly in accordance with the twenty-second embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The following description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims. 
     The present invention provides a wide-angle lens assembly including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is a meniscus lens with refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens is with refractive power. The third lens is with positive refractive power. The fourth lens is with refractive power. The fifth lens is a biconvex lens with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the object side to the image side along an optical axis. 
     Referring to Table 1, Table 3, Table 5, Table 7, Table 9, Table 11, Table 12, Table 14, Table 15, Table 17, Table 18, Table 20, and Table 21, wherein Table 1, Table 3, Table 5, Table 7, Table 9, Table 11, Table 14, Table 17, and Table 20 show optical specification in accordance with a first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth embodiments of the invention respectively and Table 12, Table 15, Table 18, and Table 21 show aspheric coefficients of each aspheric lens in Table 11, Table 14, Table 17, and Table 20 respectively. 
       FIG. 1 ,  FIG. 3 ,  FIG. 5 ,  FIG. 7 ,  FIG. 9 ,  FIG. 11 ,  FIG. 13 ,  FIG. 15 , and  FIG. 17  are lens layout diagrams of the wide-angle lens assemblies in accordance with the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth embodiments of the invention respectively. 
     The seventh lenses L 17 , L 27 , L 37 , L 47 , L 57 , L 67 , L 77 , L 87 , L 97  are meniscus lenses and made of glass material, wherein the object side surfaces S 11 , S 21 , S 31 , S 41 , S 51 , S 61 , S 71 , S 81 , S 91  are convex surfaces, the image side surfaces S 12 , S 22 , S 32 , S 42 , S 52 , S 62 , S 72 , S 82 , S 92  are concave surfaces, and the object side surfaces S 11 , S 21 , S 31 , S 41 , S 51 , S 61 , S 71 , S 81 , S 91  and the image side surfaces S 12 , S 22 , S 32 , S 42 , S 52 , S 62 , S 72 , S 82 , S 92  are spherical surfaces. 
     The first lenses L 11 , L 21 , L 31 , L 41 , L 51 , L 61 , L 71 , L 81 , L 91  are meniscus lenses with negative refractive power and made of glass material, wherein the object side surfaces S 13 , S 23 , S 33 , S 43 , S 53 , S 63 , S 73 , S 83 , S 93  are convex surfaces, the image side surfaces S 14 , S 24 , S 34 , S 44 , S 54 , S 64 , S 74 , S 84 , S 94  are concave surfaces, and the object side surfaces S 13 , S 23 , S 33 , S 43 , S 53 , S 63 , S 73 , S 83 , S 93  and the image side surfaces S 14 , S 24 , S 34 , S 44 , S 54 , S 64 , S 74 , S 84 , S 94  are spherical surfaces. 
     The sixth lenses L 16 , L 26 , L 36 , L 46 , L 56 , L 66 , L 76 , L 86 , L 96  are with refractive power and made of glass material. 
     The second lenses L 12 , L 22 , L 32 , L 42 , L 52 , L 62 , L 72 , L 82 , L 92  are with positive refractive power and made of glass material. 
     The third lenses L 13 , L 23 , L 33 , L 43 , L 53 , L 63 , L 73 , L 83 , L 93  are with positive refractive power and made of glass material, wherein the object side surfaces S 19 , S 29 , S 39 , S 49 , S 59 , S 69 , S 710 , S 810 , S 910  are convex surfaces and the object side surfaces S 19 , S 29 , S 39 , S 49 , S 59 , S 69 , S 710 , S 810 , S 910  and the image side surfaces S 110 , S 210 , S 310 , S 410 , S 510 , S 610 , S 711 , S 811 , S 911  are spherical surfaces. 
     The eighth lenses L 18 , L 28 , L 38 , L 48 , L 58 , L 68 , L 78 , L 88 , L 98  are biconvex lenses with positive refractive power and made of glass material, wherein the object side surfaces S 112 , S 212 , S 312 , S 412 , S 512 , S 612 , S 712 , S 812 , S 912  are convex surfaces, the image side surfaces S 113 , S 213 , S 313 , S 413 , S 513 , S 613 , S 713 , S 813 , S 913  are convex surfaces, and the object side surfaces S 112 , S 212 , S 312 , S 412 , S 512 , S 612 , S 712 , S 812 , S 912  and the image side surfaces S 113 , S 213 , S 313 , S 413 , S 513 , S 613 , S 713 , S 813 , S 913  are spherical surfaces. 
     The fourth lenses L 14 , L 24 , L 34 , L 44 , L 54 , L 64 , L 74 , L 84 , L 94  are with negative refractive power and made of glass material, wherein the object side surfaces S 113 , S 213 , S 313 , S 413 , S 513 , S 613 , S 713 , S 813 , S 913  are concave surfaces and the object side surfaces S 13 , S 213 , S 313 , S 413 , S 513 , S 613 , S 713 , S 813 , S 913  and the image side surfaces S 114 , S 214 , S 314 , S 414 , S 514 , S 614 , S 714 , S 814 , S 914  are spherical surfaces. 
     The fifth lenses L 15 , L 25 , L 35 , L 45 , L 55 , L 65 , L 75 , L 85 , L 95  are with positive refractive power and made of glass material, wherein the image side surfaces S 116 , S 216 , S 316 , S 416 , S 516 , S 616 , S 716 , S 816 , S 916  are convex surfaces. 
     The eighth lenses L 18 , L 28 , L 38 , L 48 , L 58 , L 68 , L 78 , L 88 , L 98  and the fourth lenses L 14 , L 24 , L 34 , L 44 , L 54 , L 64 , L 74 , L 84 , L 94  are cemented respectively. 
     In addition, the wide-angle lens assemblies  1 ,  2 ,  3 ,  4 ,  5 ,  6 ,  7 ,  8 ,  9  satisfy at least one of the following conditions: 
       5.5&lt; TTL/f&lt; 10;  (1)
 
       1.3&lt; TTL/R   71 &lt;2.6;  (2)
 
       0.03&lt;| f   71   /f   62 |&lt;1.7;  (3)
 
       30&lt; Vd   7 &lt;64.3;  (4)
 
       35&lt; Vd   1 &lt;54.5;  (5)
 
     wherein f is an effective focal length of the wide-angle lens assemblies  1 ,  2 ,  3 ,  4 ,  5 ,  6 ,  7 ,  8 ,  9  for the first to ninth embodiments, f 71  is an effective focal length of a combination of the seventh lenses L 17 , L 27 , L 37 , L 47 , L 57 , L 67 , L 77 , L 87 , L 97  and the first lenses L 11 , L 21 , L 31 , L 41 , L 51 , L 61 , L 71 , L 81 , L 91  respectively for the first to ninth embodiments, f 62  is an effective focal length of a combination of the sixth lenses L 16 , L 26 , L 36 , L 46 , L 56 , L 66 , L 76 , L 86 , L 96  and the second lenses L 12 , L 22 , L 32 , L 42 , L 52 , L 62 , L 72 , L 82 , L 92  respectively for the first to ninth embodiments, R 71  is a radius of curvature of the object side surfaces S 11 , S 21 , S 31 , S 41 , S 51 , S 61 , S 71 , S 81 , S 91  of the seventh lenses L 17 , L 27 , L 37 , L 47 , L 57 , L 67 , L 77 , L 87 , L 97  respectively for the first to ninth embodiments, TTL is an interval from the object side surfaces S 11 , S 21 , S 31 , S 41 , S 51 , S 61 , S 71 , S 81 , S 91  of the seventh lenses L 17 , L 27 , L 37 , L 47 , L 57 , L 67 , L 77 , L 87 , L 97  to image planes IMA 1 , IMA 2 , IMA 3 , IMA 4 , IMA 5 , IMA 6 , IMA 7 , IMA 8 , IMA 9  along the optical axes OA 1 , OA 2 , OA 3 , OA 4 , OA 5 , OA 6 , OA 7 , OA 8 , OA 9  respectively for the first to ninth embodiments, Vd 1  is an Abbe number of the first lenses L 11 , L 21 , L 31 , L 41 , L 51 , L 61 , L 71 , L 81 , L 91  for the first to ninth embodiments, and Vd 7  is an Abbe number of the seventh lenses L 17 , L 27 , L 37 , L 47 , L 57 , L 67 , L 77 , L 87 , L 97  for the first to ninth embodiments. With the wide-angle lens assemblies  1 ,  2 ,  3 ,  4 ,  5 ,  6 ,  7 ,  8 ,  9  satisfying at least one of the above conditions (1)-(5), the total lens length can be effectively decreased, the F-number can be effectively decreased, the resolution can be effectively increased, the environmental temperature change can be effectively resisted, the aberration can be effectively corrected, and the chromatic aberration can be effectively corrected. 
     The object side surface of the seventh lens can be convex surface, thereby helping to receive light, reduce the surface reflection of wide-field light, and improve the wide-field illumination. The image side surface of the seventh lens can be concave surface, thereby helping to reduce astigmatism. The first lens can have negative refractive power, thereby helping to correct aberration and distortion produced by the seventh lens. The object side surface of the first lens can be convex surface, thereby adjusting the surface shape of the first lens and helping to receive the light of large incident angle, so that make it propagating smoothly in the wide-angle lens assembly. The image side surface of the first lens may be concave surface, thereby helping to reduce astigmatism. The third lens can have positive refractive power, thereby helping to distribute the positive refractive power of the wide-angle lens assembly evenly to reduce the aberration caused by a single lens. The object side surface of the third lens can be convex surface, thereby, adjusting the surface shape of the third lens and helping to correct off-axis aberration such as field curvature. The eighth lens can have positive refractive power, wherein the object side surface can be convex surface, the image side surface can be convex surface, thereby providing the light-gathering ability and shortening the total lens length to meet the requirement of miniaturization for the wide-angle lens assembly. The fourth lens can have negative refractive power, thereby helping to balance the positive refractive power of the eighth lens and effectively correct chromatic aberration. The object side surface of the fourth lens can be concave surface, thereby helping to correct chromatic aberration. The fifth lens can have positive refractive power, thereby helping to match the fourth lens with strong negative refractive power to correct peripheral aberration. The image side surface of the fifth lens can be convex surface, thereby helping further to shorten the total lens length of the wide-angle lens assembly. The configuration of the stop is to be disposed between the seventh lens and the image plane which helps to expand the field of view of the wide-angle lens assembly. 
     A detailed description of a wide-angle lens assembly in accordance with a first embodiment of the invention is as follows. Referring to  FIG. 1 , the wide-angle lens assembly  1  includes a seventh lens L 17 , a first lens L 11 , a sixth lens L 16 , a second lens L 12 , a third lens L 13 , a stop ST 1 , an eighth lens L 18 , a fourth lens L 14 , a fifth lens L 15 , a ninth lens L 19 , an optical filter OF 1 , and a cover glass CG 1 , all of which are arranged in order from an object side to an image side along an optical axis OA 1 . In operation, an image of light rays from the object side is formed at an image plane IMA 1 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 17  is with positive refractive power; the sixth lens L 16  is a biconcave lens with negative refractive power, wherein the object side surface S 15  is a concave surface, the image side surface S 16  is a concave surface, and the object side surface S 15  and the image side surface S 16  are spherical surfaces; the second lens L 12  is a meniscus lens, wherein the object side surface S 17  is a concave surface, the image side surface S 18  is a convex surface, and the object side surface S 17  and the image side surface S 18  are spherical surfaces; the third lens L 13  is a biconvex lens, wherein the image side surface S 110  is a convex surface; the fourth lens L 14  is a meniscus lens, wherein the image side surface S 114  is a convex surface; the fifth lens L 15  is a biconvex lens, wherein the object side surface S 115  is a convex surface and the object side surface S 115  and the image side surface S 116  are spherical surfaces; the ninth lens L 19  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 116  is a concave surface, the image side surface S 117  is a convex surface, and the object side surface S 116  and the image side surface S 117  are spherical surfaces; the fifth lens L 15  cemented with the ninth lens L 19 ; both of the object side surface S 118  and image side surface S 119  of the optical filter OF are plane surfaces; and both of the object side surface S 120  and image side surface S 121  of the cover glass CG 1  are plane surfaces. 
     With the above design of the lenses and stop ST 1  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  1  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     If the value TTL/f of condition (1) is greater than 10 then the purpose of miniaturization of the wide-angle lens assembly is difficult to achieve. Therefore, the value TT/f must beat least less than 10. An optimal range for TTL/f is between 5.5 and 10. The wide-angle lens assembly  1  has the optimal condition for miniaturization when satisfies the condition: 5.5&lt;TTL/f&lt;10. 
     Table 1 shows the optical specification of the wide-angle lens assembly  1  in  FIG. 1 . 
     
       
         
           
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 Effective Focal Length = 4.93 mm F-number = 2.0 
               
               
                 Total Lens Length = 47.93 mm Field of View = 81.738 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 Radius  
                   
                   
                   
                 Effective 
                   
               
               
                   
                 of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S11 
                 25.00 
                 4.32 
                 1.56 
                 62.9 
                 50.99 
                 The Seventh  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L17 
               
               
                 S12 
                 166.50 
                 0.55 
                   
                   
                   
                   
               
               
                 S13 
                 14.51 
                 0.63 
                 1.8  
                 46.5 
                 −13.25 
                 The First  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L11 
               
               
                 S14 
                 6.04 
                 3.77 
                   
                   
                   
                   
               
               
                 S15 
                 −19.35 
                 0.68 
                 1.92 
                 20.8 
                 −7.14 
                 The Sixth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L16 
               
               
                 S16 
                 10.30 
                 1.53 
                   
                   
                   
                   
               
               
                 S17 
                 −42.45 
                 7.71 
                 1.65 
                 50.8 
                 31.92 
                 The Second  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L12 
               
               
                 S18 
                 −15.11 
                 0.09 
                   
                   
                   
                   
               
               
                 S19 
                 20.20 
                 1.90 
                 1.92 
                 23.9 
                 17.68 
                 The Third  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L13 
               
               
                 S110 
                 −83.41 
                 9.40 
                   
                   
                   
                   
               
               
                 S111 
                 ∞ 
                 0.46 
                   
                   
                   
                 Stop ST1 
               
               
                 S112 
                 25.25 
                 3.32 
                 1.61 
                 63.3 
                 8.80 
                 The Eighth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L18 
               
               
                 S113 
                 −6.61 
                 0.69 
                 1.8  
                 25.4 
                 −15.38 
                 The Fourth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L14 
               
               
                 S114 
                 −14.70 
                 1.41 
                   
                   
                   
                   
               
               
                 S115 
                 17.53 
                 3.55 
                 1.67 
                 55.1 
                 7.07 
                 The Fifth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L15 
               
               
                 S116 
                 −6.09 
                 0.88 
                 1.78 
                 25.6 
                 −8.82 
                 The Ninth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L19 
               
               
                 S117 
                 −50.92 
                 2.80 
                   
                   
                   
                   
               
               
                 S118 
                 ∞ 
                 0.55 
                 1.51 
                 64.1 
                   
                 Optical  
               
               
                   
                   
                   
                   
                   
                   
                 Filter OF1 
               
               
                 S119 
                 ∞ 
                 2.78 
                   
                   
                   
                   
               
               
                 S120 
                 ∞ 
                 0.50 
                 1.51 
                 64.1 
                   
                 Cover Glass  
               
               
                   
                   
                   
                   
                   
                   
                 CG1 
               
               
                 S121 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     Table 2 shows the parameters and condition values for conditions (1)-(5) in accordance with the first embodiment of the invention. It can be seen from Table 2 that the wide-angle lens assembly  1  of the first embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
             
            
               
                 f 7   1   
                 −20.245 mm 
                 f 6   2   
                 −13.7 mm 
                   
                   
               
               
                 TTL/f 
                 9.722 
                 TTL/R 71   
                 1.917 
                 | f 71 /f 62  | 
                 1.478 
               
               
                 Vd 7   
                 62.9 
                 Vd 1   
                 46.5 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 1 , the wide-angle lens assembly  1  of the first embodiment can meet the requirements of optical performance as seen in  FIGS. 2A-2G . 
     It can be seen from  FIG. 2A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  1  of the first embodiment ranges from −0.01 mm to 0.04 mm. It can be seen from  FIG. 2B  that the distortion in the wide-angle lens assembly  1  of the first embodiment ranges from −8% to 0%. It can be seen from  FIG. 2C  that the lateral color in the wide-angle lens assembly  1  of the first embodiment ranges from −0.5 μm to 1.7 μm. It can be seen from  FIG. 2D  that the relative illumination in the wide-angle lens assembly  1  of the first embodiment ranges from 0.58 to 1.0. It can be seen from  FIG. 2E  that the root mean square spot radius is equal to 0.912 μm and geometrical spot radius is equal to 3.298 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.479 μm and geometrical spot radius is equal to 6.950 μm as image height is equal to 2.778 mm, and the root mean square spot radius is equal to 1.893 μm and geometrical spot radius is equal to 11.756 μm as image height is equal to 3.928 mm for the wide-angle lens assembly  1  of the first embodiment. It can be seen from  FIG. 2F  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  1  of the first embodiment ranges from 0.60 to 1.0. It can be seen from  FIG. 2G  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  1  of the first embodiment ranges from 0.0 to 0.76 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  1  of the first embodiment can be corrected effectively, and the relative illumination, the resolution and the depth of focus of the wide-angle lens assembly  1  of the first embodiment can meet the requirement. Therefore, the wide-angle lens assembly  1  of the first embodiment is capable of good optical performance. 
     Referring to  FIG. 3 , the wide-angle lens assembly  2  includes a seventh lens L 27 , a first lens L 21 , a sixth lens L 26 , a second lens L 22 , a third lens L 23 , a stop ST 2 , an eighth lens L 28 , a fourth lens L 24 , a fifth lens L 25 , a ninth lens L 29 , an optical filter OF 2 , and a cover glass CG 2 , all of which are arranged in order from an object side to an image side along an optical axis OA 2 . In operation, an image of light rays from the object side is formed at an image plane IMA 2 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 27  is with positive refractive power; the sixth lens L 26  is a meniscus lens with negative refractive power, wherein the object side surface S 25  is a convex surface, the image side surface S 26  is a concave surface, and the object side surface S 25  and the image side surface S 26  are spherical surfaces; the second lens L 22  is a meniscus lens, wherein the object side surface S 27  is a concave surface, the image side surface S 28  is a convex surface, and the object side surface S 27  and the image side surface S 28  are spherical surfaces; the third lens L 23  is a biconvex lens, wherein the image side surface S 210  is a convex surface; the fourth lens L 24  is a meniscus lens, wherein the image side surface S 214  is a convex surface; the fifth lens L 25  is a biconvex lens, wherein the object side surface S 215  is a convex surface and the object side surface S 215  and the image side surface S 216  are spherical surfaces; the ninth lens L 29  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 216  is a concave surface, the image side surface S 217  is a convex surface, and the object side surface S 216  and the image side surface S 217  are spherical surfaces; the fifth lens L 25  cemented with the ninth lens L 29 ; both of the object side surface S 218  and image side surface S 219  of the optical filter OF 2  are plane surfaces; and both of the object side surface S 220  and image side surface S 221  of the cover glass CG 2  are plane surfaces. 
     With the above design of the lenses and stop ST 2  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  2  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     If the value TTL/R 1  of condition (2) is greater than 2.6 then the total lens length is difficult to be shortened. Therefore, the value TTL/R 71  must be at least less than 2.6. An optimal range for TTL/R 71  is between 1.3 and 2.6. The wide-angle lens assembly has the optimal condition for miniaturization when satisfies the condition: 1.3&lt;TTL/R 71 &lt;2.6. 
     Table 3 shows the optical specification of the wide-angle lens assembly  2  in  FIG. 3 . 
     
       
         
           
               
             
               
                 TABLE 3 
               
             
            
               
                   
               
               
                 Effective Focal Length = 4.93 mm F-number = 2.0 
               
               
                 Total Lens Length = 48.81 mm Field of View = 81.720 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 Radius 
                   
                   
                   
                 Effective 
                   
               
               
                   
                 of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S21 
                 19.49 
                 4.10 
                 1.51 
                 58.9 
                 48.94 
                 The  
               
               
                   
                   
                   
                   
                   
                   
                 Seventh 
               
               
                   
                   
                   
                   
                   
                   
                 Lens L27 
               
               
                 S22 
                 77.39 
                 0.66 
                   
                   
                   
                   
               
               
                 S23 
                 16.35 
                 0.70 
                 1.8 
                 46.5 
                 −12.15 
                 The First  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L21 
               
               
                 S24 
                 6.01 
                 3.20 
                   
                   
                   
                   
               
               
                 S25 
                 290.60 
                 0.68 
                 2 
                 19.3 
                 −8.55 
                 The Sixth 
               
               
                   
                   
                   
                   
                   
                   
                 Lens L26 
               
               
                 S26 
                 8.40 
                 1.91 
                   
                   
                   
                   
               
               
                 S27 
                 −29.35 
                 7.89 
                 1.62 
                 39 
                 58.248 
                 The Second 
               
               
                   
                   
                   
                   
                   
                   
                 Lens L22 
               
               
                 S28 
                 −17.99 
                 0.66 
                   
                   
                   
                   
               
               
                 S29 
                 18.15 
                 2.16 
                 1.96 
                 24.1 
                 17.543 
                 The Third  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L23 
               
               
                 S210 
                 −256.99 
                 7.82 
                   
                   
                   
                   
               
               
                 S211 
                 ∞ 
                 0.45 
                   
                   
                   
                 Stop ST2 
               
               
                 S212 
                 24.18 
                 3.20 
                 1.61 
                 63.4 
                 8.831 
                 The Eighth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L28 
               
               
                 S213 
                 −6.72 
                 1.19 
                 1.8 
                 25.4 
                 −15.75 
                 The Fourth 
               
               
                   
                   
                   
                   
                   
                   
                 Lens L24 
               
               
                 S214 
                 −15.29 
                 1.42 
                   
                   
                   
                   
               
               
                 S215 
                 16.51 
                 4.17 
                 1.67 
                 55.5 
                 6.561 
                 The Fifth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L25 
               
               
                 S216 
                 −5.49 
                 0.86 
                 1.78 
                 25.6 
                 −7.643 
                 The Ninth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L29 
               
               
                 S217 
                 −64.58 
                 2.80 
                   
                   
                   
                   
               
               
                 S218 
                 ∞ 
                 0.55 
                 1.51 
                 64.1 
                   
                 Optical  
               
               
                   
                   
                   
                   
                   
                   
                 Filter OF2 
               
               
                 S219 
                 ∞ 
                 2.86 
                   
                   
                   
                   
               
               
                 S220 
                 ∞ 
                 0.50 
                 1.51 
                 64.1 
                   
                 Cover Glass  
               
               
                   
                   
                   
                   
                   
                   
                 CG2 
               
               
                 S221 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     Table 4 shows the parameters and condition values for conditions (1)-(5) in accordance with the second embodiment of the invention. It can be seen from Table 4 that the wide-angle lens assembly  2  of the second embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 4 
               
               
                   
               
             
            
               
                 f 72   
                 −18.599 mm 
                 f 62   
                 −13.133 mm 
                   
                   
               
               
                 TTL/f 
                 9.773 
                 TTL/R 71   
                 2.472 
                 | f 71 /f 62  | 
                 1.416 
               
               
                 Vd 7   
                 58.9 
                 Vd 1   
                 46.5 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 2 , the wide-angle lens assembly  2  of the second embodiment can meet the requirements of optical performance as seen in  FIGS. 4A-4G . 
     It can be seen from  FIG. 4A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  2  of the second embodiment ranges from −0.03 mm to 0.04 mm. It can be seen from  FIG. 4B  that the distortion in the wide-angle lens assembly  2  of the second embodiment ranges from −8% to 0%. It can be seen from  FIG. 4C  that the lateral color in the wide-angle lens assembly  2  of the second embodiment ranges from −0.5 μm to 1.7 μm. It can be seen from  FIG. 4D  that the relative illumination in the wide-angle lens assembly  2  of the second embodiment ranges from 0.68 to 1.0. It can be seen from  FIG. 4E  that the root mean square spot radius is equal to 1.192 μm and geometrical spot radius is equal to 6.500 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 2.110 μm and geometrical spot radius is equal to 11.556 μm as image height is equal to 2.778 mm, and the root mean square spot radius is equal to 3.310 μm and geometrical spot radius is equal to 15.712 μm as image height is equal to 3.928 mm for the wide-angle lens assembly  2  of the second embodiment. It can be seen from  FIG. 4F  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  2  of the second embodiment ranges from 0.55 to 1.0. It can be seen from  FIG. 4G  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  2  of the second embodiment ranges from 0.0 to 0.75 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  2  of the second embodiment can be corrected effectively, and the relative illumination, the resolution and the depth of focus of the wide-angle lens assembly  2  of the second embodiment can meet the requirement. Therefore, the wide-angle lens assembly  2  of the second embodiment is capable of good optical performance. 
     Referring to  FIG. 5 , the wide-angle lens assembly  3  includes a seventh lens L 37 , a first lens L 31 , a sixth lens L 36 , a second lens L 32 , a third lens L 33 , a stop ST 3 , an eighth lens L 38 , a fourth lens L 34 , a fifth lens L 35 , a ninth lens L 39 , an optical filter OF 3 , and a cover glass CG 3 , all of which are arranged in order from an object side to an image side along an optical axis OA 3 . In operation, an image of light rays from the object side is formed at an image plane IMA 3 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 37  is with positive refractive power; the sixth lens L 36  is a biconcave lens with negative refractive power, wherein the object side surface S 35  is a concave surface, the image side surface S 36  is a concave surface, and the object side surface S 35  and the image side surface S 36  are spherical surfaces; the second lens L 32  is a meniscus lens, wherein the object side surface S 37  is a concave surface, the image side surface S 38  is a convex surface, and the object side surface S 37  and the image side surface S 38  are spherical surfaces; the third lens L 33  is a meniscus lens, wherein the image side surface S 310  is a concave surface; the fourth lens L 34  is a meniscus lens, wherein the image side surface S 314  is a convex surface; the fifth lens L 35  is a biconvex lens, wherein the object side surface S 315  is a convex surface and the object side surface S 315  and the image side surface S 316  are spherical surfaces; the ninth lens L 39  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 316  is a concave surface, the image side surface S 317  is a convex surface, and the object side surface S 316  and the image side surface S 317  are spherical surfaces; the fifth lens L 35  cemented with the ninth lens L 39 ; both of the object side surface S 318  and image side surface S 319  of the optical filter OF 3  are plane surfaces; and both of the object side surface S 320  and image side surface S 321  of the cover glass CG 3  are plane surfaces. 
     With the above design of the lenses and stop ST 3  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  3  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     If the value |f 71 /f 62 | of condition (3) is greater than 1.7 then the ability to balance the refractive power distribution of the object side and the middle section of the wide-angle lens is decreased. Therefore, the value |f 71 /f 62 | must be at least less than 1.7. An optimal range for |f 71 /f 62 | is between 0.03 and 1.7. The wide-angle lens assembly has the optimal condition for effective controlled field of view when satisfies the condition: 0.03&lt;|f 71 /f 62 |&lt;1.7. 
     Table 5 shows the optical specification of the wide-angle lens assembly  3  in  FIG. 5 . 
     
       
         
           
               
             
               
                 TABLE 5 
               
             
            
               
                   
               
               
                 Effective Focal Length = 4.93 mm F-number = 2.0 
               
               
                 Total Lens Length = 43 mm Field of View = 81.686 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 Radius  
                   
                   
                   
                 Effective 
                   
               
               
                   
                 of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S31 
                 26.48 
                 4.00 
                 1.56 
                 62.9 
                 54.51 
                 The  
               
               
                   
                   
                   
                   
                   
                   
                 Seventh  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L37 
               
               
                 S32 
                 168.42 
                 0.11 
                   
                   
                   
                   
               
               
                 S33 
                 14.10 
                 1.12 
                 1.77 
                 49.5 
                 −15.02 
                 The First  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L31 
               
               
                 S34 
                 6.16 
                 3.89 
                   
                   
                   
                   
               
               
                 S35 
                 −29.35 
                 0.85 
                 1.92 
                 20.8 
                 −6.70 
                 The Sixth 
               
               
                   
                   
                   
                   
                   
                   
                 Lens L36 
               
               
                 S36 
                 8.03 
                 1.86 
                   
                   
                   
                   
               
               
                 S37 
                 −125.57 
                 7.57 
                 1.61 
                 49.8 
                 25.194 
                 The Second  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L32 
               
               
                 S38 
                 −14.21 
                 0.10 
                   
                   
                   
                   
               
               
                 S39 
                 11.38 
                 2.33 
                 1.92 
                 23.9 
                 15.138 
                 The Third  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L33 
               
               
                 S310 
                 53.89 
                 6.32 
                   
                   
                   
                   
               
               
                 S311 
                 ∞ 
                 0.27 
                   
                   
                   
                 Stop ST3 
               
               
                 S312 
                 40.80 
                 2.29 
                 1.61 
                 63.3 
                 7.383 
                 The Eighth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L38 
               
               
                 S313 
                 −5.04 
                 1.20 
                 1.78 
                 26.2 
                 −10.752 
                 The Fourth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L34 
               
               
                 S314 
                 −13.71 
                 0.28 
                   
                   
                   
                   
               
               
                 S315 
                 13.66 
                 2.79 
                 1.67 
                 55.3 
                 6.334 
                 The Fifth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L35 
               
               
                 S316 
                 −5.77 
                 1.21 
                 1.8 
                 25.4 
                 −7.771 
                 The Ninth  
               
               
                   
                   
                   
                   
                   
                   
                 Lens L39 
               
               
                 S317 
                 −75.24 
                 2.80 
                   
                   
                   
                   
               
               
                 S318 
                 ∞ 
                 0.55 
                 1.51 
                 64.1 
                   
                 Optical 
               
               
                   
                   
                   
                   
                   
                   
                 Filter OF3 
               
               
                 S319 
                 ∞ 
                 2.55 
                   
                   
                   
                   
               
               
                 S320 
                 ∞ 
                 0.50 
                 1.51 
                 64.1 
                   
                 Cover Glass  
               
               
                   
                   
                   
                   
                   
                   
                 CG3 
               
               
                 S321 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     Table 6 shows the parameters and condition values for conditions (1)-(5) in accordance with the third embodiment of the invention. It can be seen from Table 6 that the wide-angle lens assembly  3  of the third embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 6 
               
               
                   
               
             
            
               
                 f 71   
                 −23.259 mm 
                 f 62   
                 −14.807 mm 
                   
                   
               
               
                 TTL/f 
                 8.722 
                 TTL/R 71   
                 1.624 
                 | f 71 /f 62  | 
                 1.571 
               
               
                 Vd 7   
                 62.9 
                 Vd 1   
                 49.5 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 3 , the wide-angle lens assembly  3  of the third embodiment can meet the requirements of optical performance as seen in  FIGS. 6A-6G . 
     It can be seen from  FIG. 6A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  3  of the third embodiment ranges from −0.02 mm to 0.05 mm. It can be seen from  FIG. 6B  that the distortion in the wide-angle lens assembly  3  of the third embodiment ranges from −8% to 0%. It can be seen from  FIG. 6C  that the lateral color in the wide-angle lens assembly  3  of the third embodiment ranges from −0.5 μm to 1.3 μm. It can be seen from  FIG. 6D  that the relative illumination in the wide-angle lens assembly  3  of the third embodiment ranges from 0.73 to 1.0. It can be seen from  FIG. 6E  that the root mean square spot radius is equal to 1.141 μm and geometrical spot radius is equal to 2.847 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.816 μm and geometrical spot radius is equal to 8.275 μm as image height is equal to 2.778 mm, and the root mean square spot radius is equal to 3.448 μm and geometrical spot radius is equal to 16.413 μm as image height is equal to 3.928 mm for the wide-angle lens assembly  3  of the third embodiment. It can be seen from  FIG. 6F  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  3  of the third embodiment ranges from 0.58 to 1.0. It can be seen from  FIG. 6G  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  3  of the third embodiment ranges from 0.0 to 0.72 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  3  of the third embodiment can be corrected effectively, and the relative illumination, the resolution and the depth of focus of the wide-angle lens assembly  3  of the third embodiment can meet the requirement. Therefore, the wide-angle lens assembly  3  of the third embodiment is capable of good optical performance. 
     Referring to  FIG. 7 , the wide-angle lens assembly  4  includes a seventh lens L 47 , a first lens L 41 , a sixth lens L 46 , a second lens L 42 , a third lens L 43 , a stop ST 4 , an eighth lens L 48 , a fourth lens L 44 , a fifth lens L 45 , a ninth lens L 49 , and a cover glass CG 4 , all of which are arranged in order from an object side to an image side along an optical axis OA 4 . In operation, an image of light rays from the object side is formed at an image plane IMA 4 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 47  is with positive refractive power; the sixth lens L 46  is a biconcave lens with negative refractive power, wherein the object side surface S 45  is a concave surface, the image side surface S 46  is a concave surface, and the object side surface S 45  and the image side surface S 46  are spherical surfaces; the second lens L 42  is a meniscus lens, wherein the object side surface S 47  is a concave surface, the image side surface S 48  is a convex surface, and the object side surface S 47  and the image side surface S 48  are spherical surfaces; the third lens L 43  is a biconvex lens, wherein the image side surface S 410  is a convex surface; the fourth lens L 44  is a meniscus lens, wherein the image side surface S 414  is a convex surface; the fifth lens L 45  is a biconvex lens, wherein the object side surface S 415  is a convex surface and the object side surface S 415  and the image side surface S 416  are spherical surfaces; the ninth lens L 49  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 416  is a concave surface, the image side surface S 417  is a convex surface, and the object side surface S 416  and the image side surface S 417  are spherical surfaces; the fifth lens L 45  cemented with the ninth lens L 49 ; and both of the object side surface S 418  and image side surface S 419  of the cover glass CG 4  are plane surfaces. 
     With the above design of the lenses and stop ST 4  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  4  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     If the value Vd 7  of condition (4) is less than 30 then the ability of achromatic function is poor. Therefore, the value Vd 7  must be at least greater than 30. An optimal range for Vd 7  is between 30 and 64.3. The wide-angle lens assembly has the optimal condition for effective reduced chromatic aberration when satisfies the condition: 30&lt;Vd 7 &lt;64.3. 
     Table 7 shows the optical specification of the wide-angle lens assembly  4  in  FIG. 7 . 
     
       
         
           
               
             
               
                 TABLE 7 
               
             
            
               
                   
               
               
                 Effective Focal Length = 4.93 mm F-number = 2.0 
               
               
                 Total Lens Length = 47.86 mm Field of View = 81.704 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S41 
                 23.37 
                 4.05 
                 1.58  
                 61.2 
                 48.90 
                 The Seventh Lens L47 
               
               
                 S42 
                 114.31 
                 0.57 
                   
                   
                   
                   
               
               
                 S43 
                 15.78 
                 1.06 
                 1.77  
                 49.5 
                 −13.34 
                 The First Lens L41 
               
               
                 S44 
                 6.06 
                 3.59 
                   
                   
                   
                   
               
               
                 S45 
                 −27.28 
                 0.67 
                 1.92  
                 20.8 
                 −7.37 
                 The Sixth Lens L46 
               
               
                 S46 
                 9.28 
                 1.65 
                   
                   
                   
                   
               
               
                 S47 
                 −39.56 
                 7.93 
                 1.65  
                 56.1 
                 36.006 
                 The Second Lens L42 
               
               
                 S48 
                 −15.92 
                 0.09 
                   
                   
                   
                   
               
               
                 S49 
                 18.02 
                 1.83 
                 1.92  
                 23.9 
                 17.744 
                 The Third Lens L43 
               
               
                 S410 
                 −181.85 
                 8.45 
                   
                   
                   
                   
               
               
                 S411 
                 ∞ 
                 0.48 
                   
                   
                   
                 Stop ST4 
               
               
                 S412 
                 25.34 
                 4.30 
                 1.61  
                 63.3 
                 8.805 
                 The Eighth Lens L48 
               
               
                 S413 
                 −6.50 
                 0.71 
                 1.8 
                 25.4 
                 −14.562 
                 The Fourth Lens L44 
               
               
                 S414 
                 −15.19 
                 1.43 
                   
                   
                   
                   
               
               
                 S415 
                 14.73 
                 3.27 
                 1.67  
                 55.1 
                 6.879 
                 The Fifth Lens L45 
               
               
                 S416 
                 −6.24 
                 0.82 
                 1.78  
                 25.6 
                 −8.852 
                 The Ninth Lens L49 
               
               
                 S417 
                 −61.29 
                 5.51 
                   
                   
                   
                   
               
               
                 S418 
                 ∞ 
                 1.05 
                 1.51  
                 64.1 
                   
                 Cover Glass CG4 
               
               
                 S419 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     Table 8 shows the parameters and condition values for conditions (1)-(5) in accordance with the fourth embodiment of the invention. It can be seen from Table 8 that the wide-angle lens assembly  4  of the fourth embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 8 
               
               
                   
               
             
            
               
                 f 71   
                 −21.151 mm 
                 f 62   
                 −13.404 mm 
                   
                   
               
               
                 TTL/f 
                 9.708 
                 TTL/R 71   
                 2.048 
                 | f 71 /f 62  | 
                 1.578 
               
               
                 Vd 7   
                 61.2 
                 Vd 1   
                 49.5 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 4 , the wide-angle lens assembly  4  of the fourth embodiment can meet the requirements of optical performance as seen in  FIGS. 8A-8G . 
     It can be seen from  FIG. 8A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  4  of the fourth embodiment ranges from −0.015 mm to 0.035 mm. It can be seen from  FIG. 8B  that the distortion in the wide-angle lens assembly  4  of the fourth embodiment ranges from −8% to 0%. It can be seen from  FIG. 8C  that the lateral color in the wide-angle lens assembly  4  of the fourth embodiment ranges from −0.6 μm to 1.6 μm. It can be seen from  FIG. 8D  that the relative illumination in the wide-angle lens assembly  4  of the fourth embodiment ranges from 0.58 to 1.0. It can be seen from  FIG. 8E  that the root mean square spot radius is equal to 0.824 μm and geometrical spot radius is equal to 3.083 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.389 μm and geometrical spot radius is equal to 6.870 μm as image height is equal to 2.750 mm, and the root mean square spot radius is equal to 1.973 μm and geometrical spot radius is equal to 11.821 μm as image height is equal to 3.928 mm for the wide-angle lens assembly  4  of the fourth embodiment. It can be seen from  FIG. 8F  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  4  of the fourth embodiment ranges from 0.58 to 1.0. It can be seen from  FIG. 8G  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  4  of the fourth embodiment ranges from 0.0 to 0.72 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  4  of the fourth embodiment can be corrected effectively, and the relative illumination, the resolution and the depth of focus of the wide-angle lens assembly  4  of the fourth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  4  of the fourth embodiment is capable of good optical performance. 
     Referring to  FIG. 9 , the wide-angle lens assembly  5  includes a seventh lens L 57 , a first lens L 51 , a sixth lens L 56 , a second lens L 52 , a third lens L 53 , a stop ST 5 , an eighth lens L 58 , a fourth lens L 54 , a fifth lens L 55 , a ninth lens L 59 , a tenth lens L 510 , and a cover glass CG 5 , all of which are arranged in order from an object side to an image side along an optical axis OA 5 . In operation, an image of light rays from the object side is formed at an image plane IMA 5 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 57  is with positive refractive power; the sixth lens L 56  is a biconcave lens with negative refractive power, wherein the object side surface S 55  is a concave surface, the image side surface S 56  is a concave surface, and the object side surface S 55  and the image side surface S 56  are spherical surfaces; the second lens L 52  is a biconvex lens, wherein the object side surface S 57  is a convex surface, the image side surface S 58  is a convex surface, and the object side surface S 57  and the image side surface S 58  are spherical surfaces; the third lens L 53  is a meniscus lens, wherein the image side surface S 510  is a concave surface; the fourth lens L 54  is a biconcave lens, wherein the image side surface S 514  is a concave surface; the fifth lens L 55  is a biconvex lens, wherein the object side surface S 515  is a convex surface and the object side surface S 515  and the image side surface S 516  are spherical surfaces; the ninth lens L 59  is a biconcave lens with negative refractive power and made of glass material, wherein the object side surface S 517  is a concave surface, the image side surface S 518  is a concave surface, and the object side surface S 517  and the image side surface S 518  are spherical surfaces; the tenth lens L 510  is a biconvex lens with positive refractive power and made of glass material, wherein the object side surface S 519  is a convex surface, the image side surface S 520  is a convex surface, and the object side surface S 519  and the image side surface S 520  are spherical surfaces; and both of the object side surface S 521  and image side surface S 522  of the cover glass CG 5  are plane surfaces. 
     With the above design of the lenses and stop ST 5  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  5  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     If the condition (1): 5.5&lt;TTL/f&lt;10 is satisfied, thereby enhancing the features of the positive refractive power and the shape configuration of the object side surface S 59  of the third lens L 53 , the positive refractive power and shape configuration on the object side S 512  and image side S 513  of the eighth lens L 58 , the fourth lens L 54  and shape configuration on the object side S 513  of the fourth lens L 54 , and the fifth lens L 55  and shape configuration on the image side surface S 516  of the fifth lens L 55  to effective balanced the field of view and the total lens length of the wide-angle lens assembly. If conditions (2) and (3): 1.3&lt;TTL/R 71 &lt;2.6; 0.03&lt;|f 71 /f 62 &lt;1.7 are satisfied, thereby with combining the stop is to be disposed between the seventh lens and the image plane enhancing the features of the shape configuration of the seventh lens L 57 , the object side surface S 51 , the image side surface S 52 , the first lens L 51  with negative refractive power, the object side surface S 53 , and the image side surface S 54  to strengthen the miniaturization, effectively control the field of view, help achieving a balance between F-number, field of view and total lens length for the wide-angle lens assembly. If the conditions (4) and (5): 30&lt;Vd 7 &lt;64.3; 35&lt;Vd 1 &lt;54.5 are satisfied, thereby strengthening the ability of achromatic function for the seventh lens L 57  and the first lens L 51 . 
     Table 9 shows the optical specification of the wide-angle lens assembly  5  in  FIG. 9 . 
     
       
         
           
               
             
               
                 TABLE 9 
               
             
            
               
                   
               
               
                 Effective Focal Length = 4.93 mm F-number = 2.0 
               
               
                 Total Lens Length = 42.06 mm Field of View = 81.704 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                 Thick- 
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 ness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S51 
                 25.76 
                 3.71 
                 1.67  
                 55.2 
                 47.93 
                 The Seventh Lens L57 
               
               
                 S52 
                 115.59 
                 0.07 
                   
                   
                   
                   
               
               
                 S53 
                 17.95 
                 0.92 
                 1.8 
                 40.9 
                 −12.36 
                 The First Lens L51 
               
               
                 S54 
                 6.28 
                 4.75 
                   
                   
                   
                   
               
               
                 S55 
                 −14.96 
                 1.02 
                 1.7 
                 41.1 
                 −9.41 
                 The Sixth Lens L56 
               
               
                 S56 
                 12.23 
                 5.42 
                   
                   
                   
                   
               
               
                 S57 
                 40.79 
                 3.55 
                 1.61  
                 63.3 
                 17.068 
                 The Second Lens L52 
               
               
                 S58 
                 −13.81 
                 0.06 
                   
                   
                   
                   
               
               
                 S59 
                 11.01 
                 1.95 
                 1.9 
                 31.3 
                 22.16 
                 The Third Lens L53 
               
               
                 S510 
                 22.25 
                 7.19 
                   
                   
                   
                   
               
               
                 S511 
                 ∞ 
                 0.00 
                   
                   
                   
                 Stop STS 
               
               
                 S512 
                 6.84 
                 2.08 
                 1.69  
                 55.5 
                 4.952 
                 The Eighth Lens L58 
               
               
                 S513 
                 −6.14 
                 1.20 
                 1.78  
                 25.6 
                 −3.585 
                 The Fourth Lens L54 
               
               
                 S514 
                 5.72 
                 0.38 
                   
                   
                   
                   
               
               
                 S515 
                 11.25 
                 1.77 
                 1.9 
                 37 
                 6.919 
                 The Fifth Lens L55 
               
               
                 S516 
                 −13.07 
                 0.43 
                   
                   
                   
                   
               
               
                 S517 
                 -7.31 
                 0.64 
                 1.76  
                 26.5 
                 −7.231 
                 The Ninth Lens L59 
               
               
                 S518 
                 23.83 
                 1.05 
                   
                   
                   
                   
               
               
                 S519 
                 9.20 
                 2.56 
                 1.9 
                 31.3 
                 8.32 
                 The Tenth Lens L510 
               
               
                 S520 
                 −36.76 
                 1.93 
                   
                   
                   
                   
               
               
                 S521 
                 ∞ 
                 1.00 
                 1.51  
                 64.1 
                   
                 Cover Glass CG5 
               
               
                 S522 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     Table 10 shows the parameters and condition values for conditions (1)-(5) in accordance with the fifth embodiment of the invention. It can be seen from Table 10 that the wide-angle lens assembly  5  of the fifth embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 10 
               
               
                   
               
             
            
               
                 f 71   
                 −18.568 mm 
                 f 62   
                 −527.76 mm 
                   
                   
               
               
                 TTL/f 
                 8.531 
                 TTL/R 71   
                 1.633 
                 | f 71 /f 62  | 
                 0.035 
               
               
                 Vd 7   
                 55.2 
                 Vd 1   
                 40.9 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 5 , the wide-angle lens assembly  5  of the fifth embodiment can meet the requirements of optical performance as seen in  FIGS. 10A-10G . 
     It can be seen from  FIG. 10A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  5  of the fifth embodiment ranges from −0.02 mm to 0.03 mm. It can be seen from  FIG. 10B  that the distortion in the wide-angle lens assembly  5  of the fifth embodiment ranges from −8% to 0%. It can be seen from  FIG. 10C  that the lateral color in the wide-angle lens assembly  5  of the fifth embodiment ranges from −0.3 μm to 1.6 μm. It can be seen from  FIG. 10D  that the relative illumination in the wide-angle lens assembly  5  of the fifth embodiment ranges from 0.69 to 1.0. It can be seen from  FIG. 10E  that the root mean square spot radius is equal to 0.787 μm and geometrical spot radius is equal to 3.168 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.114 μm and geometrical spot radius is equal to 6.010 μm as image height is equal to 2.750 mm, and the root mean square spot radius is equal to 2.082 μm and geometrical spot radius is equal to 9.702 μm as image height is equal to 3.928 mm for the wide-angle lens assembly  5  of the fifth embodiment. It can be seen from  FIG. 10F  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  5  of the fifth embodiment ranges from 0.59 to 1.0. It can be seen from  FIG. 10G  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  5  of the fifth embodiment ranges from 0.0 to 0.72 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  5  of the fifth embodiment can be corrected effectively, and the relative illumination, the resolution and the depth of focus of the wide-angle lens assembly  5  of the fifth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  5  of the fifth embodiment is capable of good optical performance. 
     Referring to  FIG. 11 , the wide-angle lens assembly  6  includes a seventh lens L 67 , a first lens L 61 , a sixth lens L 66 , a second lens L 62 , a third lens L 63 , a stop ST 6 , an eighth lens L 68 , a fourth lens L 64 , a fifth lens L 65 , and a cover glass CG 6 , all of which are arranged in order from an object side to an image side along an optical axis OA 6 . In operation, an image of light rays from the object side is formed at an image plane IMA 6 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 67  is with positive refractive power; the sixth lens L 66  is a biconcave lens with negative refractive power, wherein the object side surface S 65  is a concave surface, the image side surface S 66  is a concave surface, and the object side surface S 65  and the image side surface S 66  are spherical surfaces; the second lens L 62  is a biconvex lens, wherein the object side surface S 67  is a convex surface, the image side surface S 68  is a convex surface, and the object side surface S 67  and the image side surface S 68  are spherical surfaces; the third lens L 63  is a meniscus lens, wherein the image side surface S 610  is a concave surface; the fourth lens L 64  is a biconcave lens, wherein the image side surface S 614  is a concave surface: the fifth lens L 65  is a biconvex lens, wherein the object side surface S 615  is a convex surface and the object side surface S 615  and the image side surface S 616  are aspheric surfaces; and both of the object side surface S 617  and image side surface S 618  of the cover glass CG 6  are plane surfaces. 
     With the above design of the lenses and stop ST 6  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  6  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     If the value Vd 1  of condition (5) is less than 35 then the ability of achromatic function is poor. Therefore, the value Vd 1  must be at least greater than 35. An optimal range for Vd 1  is between 35 and 54.5. The wide-angle lens assembly has the optimal condition for effective reduced chromatic aberration when satisfies the condition: 35&lt;Vd 1 &lt;54.5. 
     Table 11 shows the optical specification of the wide-angle lens assembly  6  in  FIG. 11 . 
     
       
         
           
               
             
               
                 TABLE 11 
               
             
            
               
                   
               
               
                 Effective Focal Length = 4.93 mm F-number = 2.0 
               
               
                 Total Lens Length = 46.6 mm Field of View = 81.688 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                 Thick- 
                   
                   
                 Focal 
                   
               
               
                 Surface  
                 Curvature 
                 ness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S61 
                 26.40 
                 4.21 
                 1.56  
                 62.9 
                 54.00 
                 The Seventh Lens L67 
               
               
                 S62 
                 173.97 
                 0.24 
                   
                   
                   
                   
               
               
                 S63 
                 19.26 
                 0.78 
                 1.71  
                 53.8 
                 −15.47 
                 The First Lens L61 
               
               
                 S64 
                 6.91 
                 4.03 
                   
                   
                   
                   
               
               
                 S65 
                 −28.46 
                 0.92 
                 1.92  
                 23.9 
                 −7.97 
                 The Sixth Lens L66 
               
               
                 S66 
                 10.14 
                 7.14 
                   
                   
                   
                   
               
               
                 S67 
                 66.19 
                 4.04 
                 1.61  
                 63.3 
                 23.153 
                 The Second Lens L62 
               
               
                 S68 
                 −17.89 
                 0.10 
                   
                   
                   
                   
               
               
                 S69 
                 15.10 
                 2.33 
                 1.92  
                 23.9 
                 22.714 
                 The Third Lens L63 
               
               
                 S610 
                 49.24 
                 7.64 
                   
                   
                   
                   
               
               
                 S611 
                 ∞ 
                 0.80 
                   
                   
                   
                 Stop ST6 
               
               
                 S612 
                 9.76 
                 2.91 
                 1.72 
                 54 
                 5.134 
                 The Eighth Lens L68 
               
               
                 S613 
                 −5.34 
                 0.78 
                 1.76  
                 26.6 
                 −3.874 
                 The Fourth Lens L64 
               
               
                 S614 
                 7.13 
                 0.37 
                   
                   
                   
                   
               
               
                 S615 
                 11.22 
                 2.93 
                 1.64  
                 58.1 
                 9.444 
                 The Fifth Lens L65 
               
               
                 S616 
                 −12.17 
                 5.97 
                   
                   
                   
                   
               
               
                 S617 
                 ∞ 
                 1.00 
                 1.51  
                 64.1 
                   
                 Cover Glass CG6 
               
               
                 S618 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     The aspheric surface sag z of each aspheric lens in table 11 can be calculated by the following formula: 
         z=ch   2 /{1+[1−( k+ 1) c   2   h   2 ] 1/2   }+Ah   4   +Bh   6   +Ch   8  
 
     where c is curvature, h is the vertical distance from the lens surface to the optical axis, k is conic constant and A, B and C are aspheric coefficients. 
     In the sixth embodiment, the conic constant k and the aspheric coefficients A, B, C of each aspheric lens are shown in Table 12. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 12 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 Number 
                 k 
                 A 
                 B 
                 C 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 S615 
                 −4.602692 
                 −0.000547 
                 −2.26E−05 
                 −3.00E−06 
               
               
                 S616 
                 8.75262 
                 −5.50E−07 
                 −6.58E−06 
                  5.57E−07 
               
               
                   
               
            
           
         
       
     
     Table 13 shows the parameters and condition values for conditions (1)-(5) in accordance with the sixth embodiment of the invention. It can be seen from Table 13 that the wide-angle lens assembly  6  of the sixth embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 13 
               
               
                   
               
             
            
               
                 f 71   
                 −24.246 mm 
                 f 62   
                 −31.159 mm 
                   
                   
               
               
                 TTL/f 
                 9.452 
                 TTL/R 71   
                 1.765 
                 | f 71 /f 62  | 
                 0.778 
               
               
                 Vd 7   
                 62.9 
                 Vd 1   
                 53.8 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 6 , the wide-angle lens assembly  6  of the sixth embodiment can meet the requirements of optical performance as seen in  FIGS. 12A-12G . 
     It can be seen from  FIG. 12A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  6  of the sixth embodiment ranges from −0.02 mm to 0.035 mm. It can be seen from  FIG. 12B  that the distortion in the wide-angle lens assembly  6  of the sixth embodiment ranges from −8% to 0%. It can be seen from  FIG. 12C  that the lateral color in the wide-angle lens assembly  6  of the sixth embodiment ranges from −0.5 μm to 1.4 μm. It can be seen from  FIG. 12D  that the relative illumination in the wide-angle lens assembly  6  of the sixth embodiment ranges from 0.60 to 1.0. It can be seen from  FIG. 12E  that the root mean square spot radius is equal to 1.052 μm and geometrical spot radius is equal to 3.992 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.153 μm and geometrical spot radius is equal to 6.678 μm as image height is equal to 2.750 mm, and the root mean square spot radius is equal to 1.821 μm and geometrical spot radius is equal to 10.259 μm as image height is equal to 3.928 mm for the wide-angle lens assembly  6  of the sixth embodiment. It can be seen from  FIG. 12F  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  6  of the sixth embodiment ranges from 0.56 to 1.0. It can be seen from  FIG. 12G  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  6  of the sixth embodiment ranges from 0.0 to 0.72 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  6  of the sixth embodiment can be corrected effectively, and the relative illumination, the resolution and the depth of focus of the wide-angle lens assembly  6  of the sixth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  6  of the sixth embodiment is capable of good optical performance. 
     Referring to  FIG. 13 , the wide-angle lens assembly  7  includes a seventh lens L 77 , a first lens L 71 , a sixth lens L 76 , a second lens L 72 , a stop ST 7 , a third lens L 73 , an eighth lens L 78 , a fourth lens L 74 , a fifth lens L 75 , a ninth lens L 79 , an optical filter OF 7 , and a cover glass CG 7 , all of which are arranged in order from an object side to an image side along an optical axis OA 7 . In operation, an image of light rays from the object side is formed at an image plane IMA 7 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 77  is with negative refractive power; the sixth lens L 76  is a meniscus lens with positive refractive power, wherein the object side surface S 75  is a concave surface, the image side surface S 76  is a convex surface, and the object side surface S 75  and the image side surface S 76  are aspheric surfaces; the second lens L 72  is a meniscus lens, wherein the object side surface S 77  is a convex surface, the image side surface S 78  is a concave surface, and the object side surface S 77  and the image side surface S 78  are aspheric surfaces; the third lens L 73  is a biconvex lens, wherein the image side surface S 711  is a convex surface; the fourth lens L 74  is a biconcave lens, wherein the image side surface S 714  is a concave surface; the fifth lens L 75  is a meniscus lens, wherein the object side surface S 715  is a concave surface and the object side surface S 715  and the image side surface S 716  are aspheric surfaces; the ninth lens L 79  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 717  is a concave surface, the image side surface S 718  is a convex surface, and the object side surface S 717  and the image side surface S 718  are spherical surfaces; both of the object side surface S 719  and image side surface S 720  of the optical filter OF 7  are plane surfaces; and both of the object side surface S 721  and image side surface S 722  of the cover glass CG 7  are plane surfaces. 
     With the above design of the lenses and stop ST 7  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  7  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     Table 14 shows the optical specification of the wide-angle lens assembly  7  in  FIG. 13 . 
     
       
         
           
               
             
               
                 TABLE 14 
               
             
            
               
                   
               
               
                 Effective Focal Length = 5.3 mm F-number = 3.0 
               
               
                 Total Lens Length = 40.0 mm Field of View = 159.452 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S71 
                 26.59 
                 0.80 
                 1.91 
                 35.25 
                 −15.40 
                 The Seventh Lens L77 
               
               
                 S72 
                 9.08 
                 2.74 
                   
                   
                   
                   
               
               
                 S73 
                 14.20 
                 0.70 
                 1.88 
                 40.77 
                 −15.50 
                 The First Lens L71 
               
               
                 S74 
                 6.82 
                 5.02 
                   
                   
                   
                   
               
               
                 S75 
                 −24.04 
                 8.63 
                 1.52 
                 64.05 
                 23.20 
                 The Sixth Lens L76 
               
               
                 S76 
                 -9.00 
                 0.10 
                   
                   
                   
                   
               
               
                 S77 
                 9.30 
                 2.81 
                 1.71 
                 29.67 
                 39.9 
                 The Second Lens L72 
               
               
                 S78 
                 12.04 
                 4.06 
                   
                   
                   
                   
               
               
                 S79 
                 ∞ 
                 0.10 
                   
                   
                   
                 Stop ST7 
               
               
                 S710 
                 41.27 
                 1.67 
                 1.5 
                 81.61 
                 16.3 
                 The Third Lens L73 
               
               
                 S711 
                 −10.01 
                 0.50 
                   
                   
                   
                   
               
               
                 S712 
                 10.19 
                 2.29 
                 1.5 
                 81.61 
                 9.3 
                 The Eighth Lens L78 
               
               
                 S713 
                 −7.92 
                 0.60 
                 1.85  
                 23.78 
                 −7.4 
                 The Fourth Lens L74 
               
               
                 S714 
                 32.85 
                 1.37 
                   
                   
                   
                   
               
               
                 S715 
                 −12.72 
                 1.40 
                 1.81  
                 40.25 
                 18.4 
                 The Fifth Lens L75 
               
               
                 S716 
                 −7.19 
                 1.61 
                   
                   
                   
                   
               
               
                 S717 
                 −5.69 
                 0.80 
                 1.85  
                 23.78 
                 −20.3 
                 The Ninth Lens L79 
               
               
                 S718 
                 −9.03 
                 2.00 
                   
                   
                   
                   
               
               
                 S719 
                 ∞ 
                 0.30 
                 1.52  
                 64.17 
                   
                 Optical Filter OF7 
               
               
                 S720 
                 ∞ 
                 0.80 
                   
                   
                   
                   
               
               
                 S721 
                 ∞ 
                 0.50 
                 1.52  
                 64.17 
                   
                 Cover Glass CG7 
               
               
                 S722 
                 ∞ 
                 1.20 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in table 14 is the same as that of in Table 11, and is not described here again. 
     In the seventh embodiment, the conic constant k and the aspheric coefficients A, B, C of each aspheric lens are shown in Table 15. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 15 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 Number 
                 k 
                 A 
                 B 
                 C 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 S75 
                 11.78259 
                  2.70E−05 
                 −6.49E−07 
                 2.32E−08 
               
               
                 S76 
                 0 
                  2.72E−04 
                 −2.43E−06 
                 2.20E−08 
               
               
                 S77 
                 0 
                 −7.49E−05 
                  3.05E−06 
                 4.20E−08 
               
               
                 S78 
                 0 
                 −2.59E−04 
                  1.52E−05 
                 1.72E−07 
               
               
                 S715 
                 0 
                 −6.47E−04 
                 −2.17E−05 
                 3.86E−07 
               
               
                 S716 
                 0 
                 −3.55E−04 
                 −1.67E−05 
                 4.51E−09 
               
               
                   
               
            
           
         
       
     
     Table 16 shows the parameters and condition values for conditions (1)-(5) in accordance with the seventh embodiment of the invention. It can be seen from Table 16 that the wide-angle lens assembly  7  of the seventh embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 16 
               
               
                   
               
             
            
               
                 f 71   
                 −6.99 mm 
                 f 62   
                 13.28 mm 
                   
                   
               
               
                 TTL/f 
                 7.547 
                 TTL/R 71   
                 1.504 
                 | f 71 /f 62  | 
                 0.526 
               
               
                 Vd 7   
                 35.3 
                 Vd 1   
                 40.8 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 7 , the wide-angle lens assembly  7  of the seventh embodiment can meet the requirements of optical performance as seen in  FIGS. 14A-14E . 
     It can be seen from  FIG. 14A  that the longitudinal aberration in the wide-angle lens assembly  7  of the seventh embodiment ranges from −0.015 mm to 0.03 mm. It can be seen from  FIG. 14B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  7  of the seventh embodiment ranges from −0.04 mm to 0.06 mm. It can be seen from  FIG. 14C  that the distortion in the wide-angle lens assembly  7  of the seventh embodiment ranges from −80% to 0%. It can be seen from  FIG. 14D  that the lateral color in the wide-angle lens assembly  7  of the seventh embodiment ranges from 0 μm to 4.0 μm. It can be seen from  FIG. 14E  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  7  of the seventh embodiment ranges from 0.48 to 1.0. 
     It is obvious that the longitudinal aberration, the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  7  of the seventh embodiment can be corrected effectively, and the resolution of the wide-angle lens assembly  7  of the seventh embodiment can meet the requirement. Therefore, the wide-angle lens assembly  7  of the seventh embodiment is capable of good optical performance. 
     Referring to  FIG. 15 , the wide-angle lens assembly  8  includes a seventh lens L 87 , a first lens L 81 , a sixth lens L 86 , a second lens L 82 , a stop ST 8 , a third lens L 83 , an eighth lens L 88 , a fourth lens L 84 , a fifth lens L 85 , a ninth lens L 89 , an optical filter OF 8 , and a cover glass CG 8 , all of which are arranged in order from an object side to an image side along an optical axis OA 8 . In operation, an image of light rays from the object side is formed at an image plane IMA 8 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 87  is with negative refractive power; the sixth lens L 86  is a meniscus lens with positive refractive power, wherein the object side surface S 85  is a concave surface, the image side surface S 86  is a convex surface, and the object side surface S 85  and the image side surface S 86  are aspheric surfaces; the second lens L 82  is a meniscus lens, wherein the object side surface S 87  is a convex surface, the image side surface S 88  is a concave surface, and the object side surface S 87  and the image side surface S 88  are aspheric surfaces; the third lens L 83  is a biconvex lens, wherein the image side surface S 811  is a convex surface; the fourth lens L 84  is a meniscus lens, wherein the image side surface S 814  is a convex surface; the fifth lens L 85  is a meniscus lens, wherein the object side surface S 815  is a concave surface and the object side surface S 815  and the image side surface S 816  are aspheric surfaces; the ninth lens L 89  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 817  is a concave surface, the image side surface S 818  is a convex surface, and the object side surface S 817  and the image side surface S 818  are spherical surfaces; both of the object side surface S 819  and image side surface S 820  of the optical filter OF 8  are plane surfaces; and both of the object side surface S 821  and image side surface S 822  of the cover glass CG 8  are plane surfaces. 
     With the above design of the lenses and stop ST 8  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  8  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     Table 17 shows the optical specification of the wide-angle lens assembly  8  in  FIG. 15 . 
     
       
         
           
               
             
               
                 TABLE 17 
               
             
            
               
                   
               
               
                 Effective Focal Length = 5.3 mm F-number = 3.0 
               
               
                 Total Lens Length = 40.02 mm Field of View = 159.534 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S81 
                 25.65 
                 1.41 
                 1.91 
                 35.25 
                 −16.70 
                 The Seventh Lens L87 
               
               
                 S82 
                 9.33 
                 2.95 
                   
                   
                   
                   
               
               
                 S83 
                 15.33 
                 0.70 
                 1.88 
                 40.77 
                 −14.60 
                 The First Lens L81 
               
               
                 S84 
                 6.86 
                 5.61 
                   
                   
                   
                   
               
               
                 S85 
                 −13.78 
                 5.76 
                 1.52 
                 64.05 
                 34.70 
                 The Sixth Lens L86 
               
               
                 S86 
                 −8.91 
                 0.10 
                   
                   
                   
                   
               
               
                 S87 
                 8.24 
                 3.94 
                 1.71 
                 29.67 
                 56 
                 The Second Lens L82 
               
               
                 S88 
                 8.29 
                 3.50 
                   
                   
                   
                   
               
               
                 S89 
                 ∞ 
                 0.10 
                   
                   
                   
                 Stop ST8 
               
               
                 S810 
                 10.83 
                 3.19 
                 1.5 
                 81.61 
                 10.2 
                 The Third Lens L83 
               
               
                 S811 
                 −8.60 
                 0.50 
                   
                   
                   
                   
               
               
                 S812 
                 15.82 
                 2.51 
                 1.5 
                 81.61 
                 9.8 
                 The Eighth Lens L88 
               
               
                 S813 
                 −6.71 
                 0.60 
                 1.85 
                 23.78 
                 −9.2 
                 The Fourth Lens L84 
               
               
                 S814 
                 −46.45 
                 1.38 
                   
                   
                   
                   
               
               
                 S815 
                 −6.86 
                 1.05 
                 1.81 
                 40.25 
                 40.8 
                 The Fifth Lens L85 
               
               
                 S816 
                 −6.06 
                 1.12 
                   
                   
                   
                   
               
               
                 S817 
                 −5.74 
                 0.80 
                 1.85 
                 23.78 
                 −20.5 
                 The Ninth Lens L89 
               
               
                 S818 
                 −9.08 
                 2.00 
                   
                   
                   
                   
               
               
                 S819 
                 ∞ 
                 0.30 
                 1.52 
                 64.17 
                   
                 Optical Filter OF8 
               
               
                 S820 
                 ∞ 
                 0.80 
                   
                   
                   
                   
               
               
                 S821 
                 ∞ 
                 0.50 
                 1.52 
                 64.17 
                   
                 Cove Glass CG8 
               
               
                 S822 
                 ∞ 
                 1.20 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in table 17 is the same as that of in Table 11, and is not described here again. 
     In the eighth embodiment, the conic constant k and the aspheric coefficients A, B, C of each aspheric lens are shown in Table 18. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 18 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 Number 
                 k 
                 A 
                 B 
                 C 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 S85 
                 2.943 
                 1.61E−04 
                 −3.81E−06  
                 6.26E−08 
               
               
                 S86 
                 0 
                 1.19E−04 
                 5.23E−07 
                 −5.81E−09  
               
               
                 S87 
                 0 
                 −5.84E−05  
                 9.55E−07 
                 1.84E−07 
               
               
                 S88 
                 0 
                 1.93E−04 
                 1.31E−06 
                 2.47E−06 
               
               
                 S815 
                 0 
                 2.44E−04 
                 4.21E−05 
                 −3.41E−08  
               
               
                 S816 
                 0 
                 4.62E−04 
                 2.70E−05 
                 5.90E−07 
               
               
                   
               
            
           
         
       
     
     Table 19 shows the parameters and condition values for conditions (1)-(5) in accordance with the eighth embodiment of the invention. It can be seen from Table 19 that the wide-angle lens assembly  8  of the eighth embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 19 
               
               
                   
               
             
            
               
                 f 71   
                 −7.06 mm 
                 f 62   
                 18.22 mm 
                   
                   
               
               
                 TTL/f 
                 7.551 
                 TTL/R 71   
                 1.560 
                 | f 71 /f 62  | 
                 0.387 
               
               
                 Vd 7   
                 35.3 
                 Vd 1   
                 40.8 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 8 , the wide-angle lens assembly  8  of the eighth embodiment can meet the requirements of optical performance as seen in  FIGS. 16A-16E . 
     It can be seen from  FIG. 16A  that the longitudinal aberration in the wide-angle lens assembly  8  of the eighth embodiment ranges from −0.01 mm to 0.025 mm. It can be seen from  FIG. 16B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  8  of the eighth embodiment ranges from −0.04 mm to 0.06 mm. It can be seen from  FIG. 16C  that the distortion in the wide-angle lens assembly  8  of the eighth embodiment ranges from −80% to 0%. It can be seen from  FIG. 16D  that the lateral color in the wide-angle lens assembly  8  of the eighth embodiment ranges from 0 μm to 3.5 μm. It can be seen from  FIG. 16E  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  8  of the eighth embodiment ranges from 0.49 to 1.0. 
     It is obvious that the longitudinal aberration, the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  8  of the eighth embodiment can be corrected effectively, and the resolution of the wide-angle lens assembly  8  of the eighth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  8  of the eighth embodiment is capable of good optical performance. 
     Referring to  FIG. 17 , the wide-angle lens assembly  9  includes a seventh lens L 97 , a first lens L 91 , a sixth lens L 96 , a second lens L 92 , a stop ST 9 , a third lens L 93 , an eighth lens L 98 , a fourth lens L 94 , a fifth lens L 95 , a ninth lens L 99 , an optical filter OF 9 , and a cover glass CG 9 , all of which are arranged in order from an object side to an image side along an optical axis OA 9 . In operation, an image of light rays from the object side is formed at an image plane IMA 9 . 
     According to paragraphs [0144]-[0155], wherein: the seventh lens L 97  is with negative refractive power; the sixth lens L 96  is a meniscus lens with positive refractive power, wherein the object side surface S 95  is a concave surface, the image side surface S 96  is a convex surface, and the object side surface S 95  and the image side surface S 96  are aspheric surfaces; the second lens L 92  is a meniscus lens, wherein the object side surface S 97  is a convex surface, the image side surface S 98  is a concave surface, and the object side surface S 97  and the image side surface S 98  are aspheric surfaces; the third lens L 93  is a biconvex lens, wherein the image side surface S 911  is a convex surface; the fourth lens L 94  is a meniscus lens, wherein the image side surface S 914  is a convex surface; the fifth lens L 95  is a meniscus lens, wherein the object side surface S 915  is a concave surface and the object side surface S 915  and the image side surface S 916  are aspheric surfaces; the ninth lens L 99  is a meniscus lens with negative refractive power and made of glass material, wherein the object side surface S 917  is a concave surface, the image side surface S 918  is a convex surface, and the object side surface S 917  and the image side surface S 918  are spherical surfaces; both of the object side surface S 919  and image side surface S 920  of the optical filter OF 9  are plane surfaces; and both of the object side surface S 921  and image side surface S 922  of the cover glass CG 9  are plane surfaces. 
     With the above design of the lenses and stop ST 9  and at least any one of the conditions (1)-(5) satisfied, the wide-angle lens assembly  9  can have an effective decreased total lens length, an effective decreased F-number, an effective increased resolution, an effective resisted environmental temperature change, an effective corrected aberration, and an effective corrected chromatic aberration. 
     Table 20 shows the optical specification of the wide-angle lens assembly  9  in  FIG. 17 . 
     
       
         
           
               
             
               
                 TABLE 20 
               
             
            
               
                   
               
               
                 Effective Focal Length = 5.3 mm F-number = 3.0 
               
               
                 Total Lens Length = 31.01 mm Field of View = 159.616 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S91 
                 21.13 
                 0.80 
                 1.91 
                 35.25  
                 −11.30 
                 The Seventh Lens L97 
               
               
                 S92 
                 6.81 
                 1.80 
                   
                   
                   
                   
               
               
                 S93 
                 9.08 
                 0.70 
                 1.88 
                 40.77 
                 −16.50 
                 The First Lens L91 
               
               
                 S94 
                 5.40 
                 4.96 
                   
                   
                   
                   
               
               
                 S95 
                 −7.78 
                 3.11 
                 1.52 
                 64.05 
                 37.30 
                 The Sixth Lens L96 
               
               
                 S96 
                 −6.31 
                 0.10 
                   
                   
                   
                   
               
               
                 S97 
                 6.67 
                 2.11 
                 1.71  
                 29.67 
                 21.60 
                 The Second Lens L92 
               
               
                 S98 
                 10.14 
                 3.00 
                   
                   
                   
                   
               
               
                 S99 
                 ∞ 
                 0.10 
                   
                   
                   
                 Stop ST9 
               
               
                 S910 
                 13.09 
                 1.41 
                 1.5 
                 81.61 
                 11.1 
                 The Third Lens L93 
               
               
                 S911 
                 −9.24 
                 0.50 
                   
                   
                   
                   
               
               
                 S912 
                 19.36 
                 2.28 
                 1.5 
                 81.61 
                 8.2 
                 The Eighth Lens L98 
               
               
                 S913 
                 −5.01 
                 0.60 
                 1.85  
                 23.78 
                 −7.6 
                 The Fourth Lens L94 
               
               
                 S914 
                 −23.86 
                 0.61 
                   
                   
                   
                   
               
               
                 S915 
                 −6.65 
                 1.12 
                 1.81 
                 40.25 
                 22.8 
                 The Fifth Lens L95 
               
               
                 S916 
                 −5.25 
                 0.93 
                   
                   
                   
                   
               
               
                 S917 
                 −5.47 
                 0.80 
                 1.85 
                 23.78 
                 −18.2 
                 The Ninth Lens L99 
               
               
                 S918 
                 −9.02 
                 2.00 
                   
                   
                   
                   
               
               
                 S919 
                 ∞ 
                 0.30 
                 1.52 
                 64.17 
                   
                 Optical Filter OF9 
               
               
                 S920 
                 ∞ 
                 2.08 
                   
                   
                   
                   
               
               
                 S921 
                 ∞ 
                 0.50 
                 1.52 
                 64.17 
                   
                 Cover Glass CG9 
               
               
                 S922 
                 ∞ 
                 1.20 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in table 20 is the same as that of in Table 11, and is not described here again. 
     In the ninth embodiment, the conic constant k and the aspheric coefficients A, B, C of each aspheric lens are shown in Table 21. 
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 21 
               
               
                   
                   
               
               
                   
                 Surface 
                   
                   
                   
                   
               
               
                   
                 Number 
                 k 
                 A 
                 B 
                 C 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 S95 
                 1.078 
                 7.67E−04 
                 −5.67E−05 
                 1.85E−06 
               
               
                   
                 S96 
                 0 
                 1.64E−04 
                  7.15E−06 
                 2.14E−07 
               
               
                   
                 S97 
                 0 
                 −7.08E−04  
                 −6.32E−07 
                 3.05E−06 
               
               
                   
                 S98 
                 0 
                 −5.78E−04  
                 −1.26E−05 
                 8.43E−06 
               
               
                   
                 S915 
                 0 
                 2.31E−04 
                  1.31E−04 
                 1.85E−07 
               
               
                   
                 S916 
                 0 
                 8.07E−04 
                  6.72E−05 
                 3.66E−06 
               
               
                   
                   
               
            
           
         
       
     
     Table 22 shows the parameters and condition values for conditions (1)-(5) in accordance with the ninth embodiment of the invention. It can be seen from Table 22 that the wide-angle lens assembly  9  of the ninth embodiment satisfies the conditions (1)-(5). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 22 
               
               
                   
               
             
            
               
                 f 71   
                 −6.12 mm 
                 f 62   
                 12.27 mm 
                   
                   
               
               
                 TTL/f 
                 5.851 
                 TTL/R 71   
                 1.468 
                 | f 71 /f 62  | 
                 0.498 
               
               
                 Vd 7   
                 35.3 
                 Vd 1   
                 40.8 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 9 , the wide-angle lens assembly  9  of the ninth embodiment can meet the requirements of optical performance as seen in  FIGS. 18A-18E . 
     It can be seen from  FIG. 18A  that the longitudinal aberration in the wide-angle lens assembly  9  of the ninth embodiment ranges from −0.01 mm to 0.03 mm. It can be seen from  FIG. 18B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  9  of the ninth embodiment ranges from −0.04 mm to 0.13 mm. It can be seen from  FIG. 18C  that the distortion in the wide-angle lens assembly  9  of the ninth embodiment ranges from −80% to 0%. It can be seen from  FIG. 18D  that the lateral color in the wide-angle lens assembly  9  of the ninth embodiment ranges from 0.5 μm to 4.0 μm. It can be seen from  FIG. 18E  that the modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  9  of the ninth embodiment ranges from 0.40 to 1.0. 
     It is obvious that the longitudinal aberration, the field curvature, the distortion, and the lateral color of the wide-angle lens assembly  9  of the ninth embodiment can be corrected effectively, and the resolution of the wide-angle lens assembly  9  of the ninth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  9  of the ninth embodiment is capable of good optical performance. 
     Referring to Table 23, Table 24, Table 26, Table 27, Table 29, Table 30, Table 32, and Table 33, wherein Table 23, Table 26, Table 29, and Table 32 show optical specification in accordance with a tenth, eleventh, twelfth, and thirteenth embodiments of the invention respectively and Table 24, Table 27, Table 30, and Table 33 show aspheric coefficients of each aspheric lens in Table 23, Table 26, Table 29, and Table 32 respectively. 
       FIG. 19 ,  FIG. 21 ,  FIG. 23 , and  FIG. 25  are lens layout and optical path diagrams of the wide-angle lens assemblies in accordance with the tenth, eleventh, twelfth, and thirteenth embodiments of the invention respectively. 
     The first lenses L 101 , L 111 , L 121 , L 131  are meniscus lenses with negative refractive power and made of plastic material, wherein the object side surfaces S 101 , S 111 , S 121 , S 131  are convex surfaces, the image side surfaces S 102 , S 112 , S 122 , S 132  are concave surfaces, and the object side surfaces S 101 , S 111 , S 121 , S 131  and the image side surfaces S 102 , S 112 , S 122 , S 132  are aspheric surfaces. 
     The second lenses L 102 , L 112 , L 122 , L 132  are biconvex lenses with positive refractive power and made of plastic material, wherein the object side surfaces S 105 , S 15  S 125 , S 133  are convex surfaces, the image side surfaces S 106 , S 116 , S 126 , S 134  are convex surfaces, and the object side surfaces S 105 , S 115  S 125 , S 133  and the image side surfaces S 106 , S 116 , S 126 , S 134  are aspheric surfaces. 
     The third lenses L 103 , L 113 , L 123 , L 133  are biconvex lenses with positive refractive power and made of plastic material, wherein the object side surfaces S 108 , S 118 , S 128 , S 136  are convex surfaces, the image side surfaces S 109 , S 119 , S 129 , S 137  are convex surfaces, and the object side surfaces S 108 , S 118 , S 128 , S 136  and the image side surfaces S 109 , S 119 , S 129 , S 137  are aspheric surfaces. 
     The fourth lenses L 104 , L 114 , L 124 , L 134  are biconcave lenses with negative refractive power and made of plastic material, wherein the object side surfaces S 1010 , S 1110 , S 1210 , S 138  are concave surfaces, the image side surfaces S 1011 , S 1111 , S 1211 , S 139  are concave surfaces, and the object side surfaces S 1010 , S 1110 , S 1210 , S 138  and the image side surfaces S 011 , S 1111 , S 1211 , S 139  are aspheric surfaces. 
     The fifth lenses L 105 , L 115 , L 125 , L 135  are biconvex lenses with positive refractive power and made of plastic material, wherein the object side surfaces S 1012 , S 1112 , S 1212 , S 1310  are convex surfaces, the image side surfaces S 1013 , S 1113 , S 1213 , S 1311  are convex surfaces, and the object side surfaces S 1012 , S 1112 , S 1212 , S 1310  and the image side surfaces S 1013 , S 1113 , S 1213 , S 1311  are aspheric surfaces. 
     In addition, the lens assemblies  10 ,  11 ,  12 ,  13  satisfy at least one of the following conditions: 
       0.4≤ BFL/TTL≤ 0.5,  (6)
 
       4≤ TTL /IH≤6.5;  (7)
 
       0.8≤| f   1   |/f≤ 1.5;  (8)
 
       1.1≤ BFL /IH≤2.8;  (9)
 
       −0.93&lt; f   1   /f   5 ≤−0.68;  (10)
 
     wherein BFL is an interval from the image side surfaces S 1013 , S 1113 , S 1213 , S 1311  of the fifth lenses L 105 , L 115 , L 125 , L 135  to the image planes IMA 10 , IMA 11 , IMA 12 , IMA 13  along the optical axes OA 10 , OA 11 , OA 12 , OA 13  respectively for the tenth to thirteenth embodiments, TTL is an interval from the object side surfaces S 101 , S 111 , S 121 , S 131  of the first lenses L 101 , L 111 , L 121 , L 131  to the image planes IMA 10 , IMA 11 , IMA 12 , IMA 13  along the optical axes OA 10 , OA 11 , OA 12 , OA 13  respectively for the tenth to thirteenth embodiments, IH is a half image height of the image planes IMA 10 , IMA 11 , IMA 12 , IMA 13  of the wide-angle lens assemblies  10 ,  11 ,  12 ,  13  for the tenth to thirteenth embodiments, f 1  is an effective focal length of the first lenses L 101 , L 11 , L 121 , L 131  for the tenth to the thirteenth embodiments, f 5  is an effective focal length of the fifth lenses L 105 , L 115 , L 125 , L 135  for the tenth to the thirteenth embodiments, f is an effective focal length of the lens assemblies  10 ,  11 ,  12 ,  13  for the tenth to the thirteenth embodiments. With the lens assemblies  10 ,  11 ,  12 ,  13  satisfying at least one of the above conditions (6)-(10), the total lens length can be effectively shortened, the resolution can be effectively increased, the chromatic aberration can be effectively corrected, and the aberration can be effectively corrected. 
     Condition (6) is used to confirm the back focal length, condition (7) is used to confirm the relationship between image height and total lens length of the wide-angle lens assembly, condition (8) is used to confirm the ability of light collection of the first lens, condition (9) is used to confirm the size of the back focus space, and condition (10) is used to confirm the machinability of the first lens and the fifth lens. 
     The above conditions (6)-(10) can make the wide-angle lens assembly having good optical performance and reducing production cost. 
     A detailed description of a wide-angle lens assembly in accordance with a tenth embodiment of the invention is as follows. Referring to  FIG. 19 , the wide-angle lens assembly  10  includes a first lens L 101 , a sixth lens L 106 , a second lens L 102 , a stop ST 10 , a third lens L 103 , a fourth lens L 104 , a fifth lens L 105 , and an optical filter OF 10 , all of which are arranged in order from an object side to an image side along an optical axis OA 10 . In operation, an image of light rays from the object side is formed at an image plane IMA 10 . 
     According to paragraphs [0144], [0250]-[0256], wherein: the sixth lens L 106  is a biconcave lens with negative refractive power and made of plastic material, wherein the object side surface S 103  is a concave surface, the image side surface S 104  is a concave surface, and both of the object side surface S 103  and image side surface S 104  are aspheric surfaces; and both of the object side surface S 1014  and image side surface S 1015  of the optical filter OF 10  are plane surfaces. 
     With the above design of the lenses and stop ST 10  and at least any one of the conditions (6)-(10) satisfied, the wide-angle lens assembly  10  can have an effective decreased total lens length, an effective increased resolution, an effective corrected chromatic aberration, and is capable of an effective corrected aberration. 
     Table 23 shows the optical specification of the wide-angle lens assembly  10  in  FIG. 19 . 
     
       
         
           
               
             
               
                 TABLE 23 
               
             
            
               
                   
               
               
                 Effective Focal Length = 3.907 mm F-number = 2.4 
               
               
                 Total Lens Length = 17.55 mm Field of View = 80.89 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S101 
                 32.21 
                 1.00 
                 1.54  
                 56.1 
                 −4.71 
                 The First Lens L101 
               
               
                 S102 
                 2.32 
                 1.62 
                   
                   
                   
                   
               
               
                 S103 
                 −68.27 
                 0.50 
                 1.54  
                 56.1 
                 −9.74 
                 The Sixth Lens L106 
               
               
                 S104 
                 5.68 
                 0.25 
                   
                   
                   
                   
               
               
                 S105 
                 4.89 
                 2.62 
                 1.64  
                 23.5 
                 7.16 
                 The Second Lens L102 
               
               
                 S106 
                 −64.52 
                 0.77 
                   
                   
                   
                   
               
               
                 S107 
                 ∞ 
                 −0.12 
                   
                   
                   
                 Stop ST10 
               
               
                 S108 
                 14.57 
                 1.16 
                 1.54  
                 56.1 
                 5.07 
                 The Third Lens L103 
               
               
                 S109 
                 −3.25 
                 0.02 
                   
                   
                   
                   
               
               
                 S1010 
                 −6.13 
                 0.44 
                 1.64  
                 23.5 
                 −5.10 
                 The Fourth Lens L104 
               
               
                 S1011 
                 7.31 
                 0.11 
                   
                   
                   
                   
               
               
                 S1012 
                 22.43 
                 1.18 
                 1.54  
                 56.1 
                 5.19 
                 The Fifth Lens L105 
               
               
                 S1013 
                 −3.12 
                 7.40 
                   
                   
                   
                   
               
               
                 S1014 
                 ∞ 
                 0.21 
                 1.52 
                 64.2 
                   
                 Optical Filter OF10 
               
               
                 S1015 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     The aspheric surface sag z of each aspheric lens in table 23 can be calculated by the following formula: 
         z=ch   2 /{1+[1−( k +) c   2   h ] 1/2   }+Ah   4   +Bh   6   +Ch   8   +Dh   10   +Eh   12   +Fh   14   +Gh   16  
 
     where cis curvature, his the vertical distance from the lens surface to the optical axis, k is conic constant and A, B, C, D, E, F, and G are a spheric coefficients. 
     In the tenth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 24. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 24 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S101 
                 43.1643066 
                 0.0010098 
                 0.0000838 
                 −0.0000161 
                 0.0000006 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S102 
                 −0.7379838 
                 0.0052469 
                 0.0013575 
                 0.0001108 
                 0.0000035 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S103 
                 943.0635982 
                 −0.0000158 
                 0.0002538 
                 −0.0000228 
                 0 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S104 
                 2.1643036 
                 0.0011049 
                 0.0000046 
                 0.0000742 
                 0 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S105 
                 −2.8777137 
                 0.0055368 
                 0.0015033 
                 −0.0001142 
                 0.0000362 
               
               
                   
                   
                 −0.0000041 
                 0 
                 0 
               
               
                 S106 
                 −7777.012846 
                 0.0097749 
                 0.0037767 
                 0.0006093 
                 −0.000234 
               
               
                   
                   
                 0.0001011 
                 0 
                 0 
               
               
                 S108 
                 −0.8203576 
                 0.0019536 
                 0.0022397 
                 −0.0003624 
                 −0.0000673 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S109 
                 −0.1589414 
                 −0.0036859 
                 −0.0006929 
                 0.0003344 
                 −0.000034 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S1010 
                 −23.0511424 
                 −0.0291702 
                 0.0052135 
                 −0.0019229 
                 0.0008601 
               
               
                   
                   
                 −0.0000553 
                 −0.0000061 
                 0 
               
               
                 S1011 
                 −81.5349384 
                 0.0080265 
                 −0.0064692 
                 0.001255 
                 0.0000571 
               
               
                   
                   
                 −0.0000319 
                 0.0000059 
                 0 
               
               
                 S1012 
                 37.4359941 
                 −0.0002583 
                 0.0070008 
                 −0.004405 
                 0.0017525 
               
               
                   
                   
                 −0.0003636 
                 0.0000401 
                 −0.0000021 
               
               
                 S1013 
                 −2.4190438 
                 −0.0048 
                 0.0018776 
                 0.0000218 
                 0.0002056 
               
               
                   
                   
                 −0.000049 
                 0.0000085 
                 −0.0000012 
               
               
                   
               
            
           
         
       
     
     Table 25 shows the parameters and condition values for conditions (6)-(10) in accordance with the tenth embodiment of the invention. It can be seen from Table 25 that the wide-angle lens assembly  10  of the tenth embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 25 
               
               
                   
               
             
            
               
                 BFL 
                 8.01 mm 
                 IH 
                 3.0175 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.46 
                 TTL/IH 
                 5.82 
                 | f 1  |/f 
                 1.21 
               
               
                 BFL/IH 
                 2.65 
                 f 1 /f 5   
                 −0.91 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 10 , the wide-angle lens assembly  10  of the tenth embodiment can meet the requirements of optical performance as seen in  FIGS. 20A-20D . 
     It can be seen from  FIG. 20A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  10  of the tenth embodiment ranges from −0.06 mm to 0.05 mm. It can be seen from  FIG. 20B  that the distortion in the wide-angle lens assembly  10  of the tenth embodiment ranges from −12% to 0%. It can be seen from  FIG. 20C  that the root mean square spot radius is equal to 1.082 μm and geometrical spot radius is equal to 2.763 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.567 μm and geometrical spot radius is equal to 5.539 μm as image height is equal to 1.509 mm, and the root mean square spot radius is equal to 2.370 μm and geometrical spot radius is equal to 7.535 μm as image height is equal to 3.018 mm for the wide-angle lens assembly  10  of the tenth embodiment. It can be seen from  FIG. 20D  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  10  of the tenth embodiment ranges from 0.0 to 0.76 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature and the distortion of the wide-angle lens assembly  10  of the tenth embodiment can be corrected effectively, and the resolution and the depth of focus of the wide-angle lens assembly  10  of the tenth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  10  of the tenth embodiment is capable of good optical performance. 
     Referring to  FIG. 21 , the wide-angle lens assembly  11  includes a first lens L 111 , a sixth lens L 116 , a second lens L 112 , a stop ST 1 , a third lens L 113 , a fourth lens L 114 , a fifth lens L 115 , and an optical filter OF 11 , all of which are arranged in order from an object side to an image side along an optical axis OA 11 . In operation, an image of light rays from the object side is formed at an image plane IMA 1 . 
     According to paragraphs [0144], [0250]-[0256], wherein: the sixth lens L 116  is a biconcave lens with negative refractive power and made of plastic material, wherein the object side surface S 113  is a concave surface, the image side surface S 114  is a concave surface and both of the object side surface S 113  and image side surface S 114  are aspheric surfaces; and both of the object side surface S 1114  and image side surface S 1115  of the optical filter OF 11  are plane surfaces. 
     With the above design of the lenses and stop ST 1  land at least any one of the conditions (6)-(10) satisfied, the wide-angle lens assembly  11  can have an effective decreased total lens length, an effective increased resolution, an effective corrected chromatic aberration, and is capable of an effective corrected aberration. 
     Table 26 shows the optical specification of the wide-angle lens assembly  11  in  FIG. 21 . 
     
       
         
           
               
             
               
                 TABLE 26 
               
             
            
               
                   
               
               
                 Effective Focal Len = 3.93 mm F-number = 2.4 
               
               
                 Total Lens Length = 17.84 mm Field of View = 81.162 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S111 
                 33.77 
                 1.00 
                 1.54  
                 56.1 
                 −4.70 
                 The First Lens L111 
               
               
                 S112 
                 2.33 
                 1.69 
                   
                   
                   
                   
               
               
                 S113 
                 −66.70 
                 0.50 
                 1.54  
                 56.1 
                 −9.70 
                 The Sixth Lens L116 
               
               
                 S114 
                 5.67 
                 0.27 
                   
                   
                   
                   
               
               
                 S115 
                 5.00 
                 2.64 
                 1.64  
                 23.5 
                 7.27 
                 The Second Lens L112 
               
               
                 S116 
                 −59.78 
                 0.77 
                   
                   
                   
                   
               
               
                 S117 
                 ∞ 
                 −0.12 
                   
                   
                   
                 Stop ST11 
               
               
                 S118 
                 15.04 
                 1.17 
                 1.54  
                 56.1 
                 5.09 
                 The Third Lens L113 
               
               
                 S119 
                 −3.25 
                 0.02 
                   
                   
                   
                   
               
               
                 S1110 
                 −6.15 
                 0.45 
                 1.64  
                 23.5 
                 −5.12 
                 The Fourth Lens L114 
               
               
                 S1111 
                 7.31 
                 0.11 
                   
                   
                   
                   
               
               
                 S1112 
                 23.26 
                 1.16 
                 1.54  
                 56.1 
                 5.27 
                 The Fifth Lens L115 
               
               
                 S1113 
                 −3.16 
                 7.58 
                   
                   
                   
                   
               
               
                 S1114 
                 ∞ 
                 0.21 
                 1.52  
                 64.2 
                   
                 Optical Filter OF11 
               
               
                 S1115 
                 ∞ 
                 7.98 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in table 26 is the same as that of in Table 23, and is not described here again. 
     In the eleventh embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 27. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 27 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S111 
                 44.5389357 
                 0.0010175 
                 0.000084 
                 −0.0000162 
                 0.0000006 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S112 
                 −0.7142937 
                 0.0056736 
                 0.0013314 
                 0.0001267 
                 0.0000095 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S113 
                 924.2849143 
                 0.0000536 
                 0.0002429 
                 −0.000024 
                 0 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S114 
                 2.0752097 
                 0.000977 
                 0.0000095 
                 0.000074 
                 0 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S115 
                 −2.6792813 
                 0.0056831 
                 0.0015161 
                 −0.0001071 
                 0.0000378 
               
               
                   
                   
                 −0.0000042 
                 0 
                 0 
               
               
                 S116 
                 −6311.015553 
                 0.0097376 
                 0.003752 
                 0.0006117 
                 −0.0002295 
               
               
                   
                   
                 0.000103 
                 0 
                 0 
               
               
                 S118 
                 −1.2599151 
                 0.0019372 
                 0.0022384 
                 −0.0003637 
                 −0.0000676 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S119 
                 −0.1691989 
                 −0.0036349 
                 −0.0006791 
                 0.0003373 
                 −0.0000335 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S1110 
                 −23.2079011 
                 −0.0291747 
                 0.0052129 
                 −0.0019223 
                 0.0008605 
               
               
                   
                   
                 −0.0000551 
                 −0.000006 
                 0 
               
               
                 S1111 
                 −81.2604771 
                 0.0080223 
                 −0.0064728 
                 0.0012535 
                 0.0000568 
               
               
                   
                   
                 −0.000032 
                 0.0000059 
                 0 
               
               
                 S1112 
                 38.0017304 
                 −0.0002551 
                 0.0070056 
                 −0.0044036 
                 0.0017526 
               
               
                   
                   
                 −0.0003637 
                 0.00004 
                 −0.0000021 
               
               
                 S1113 
                 −2.4292809 
                 −0.0047875 
                 0.0018718 
                 0.0000185 
                 0.0002047 
               
               
                   
                   
                 −0.0000492 
                 0.0000084 
                 −0.0000012 
               
               
                   
               
            
           
         
       
     
     Table 28 shows the parameters and condition values for conditions (6)-(10) in accordance with the eleventh embodiment of the invention. It can be seen from Table 28 that the wide-angle lens assembly  11  of the eleventh embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 28 
               
               
                   
               
             
            
               
                 BFL 
                 8.19 mm 
                 IH 
                 3.0175 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.46 
                 TTL/IH 
                 5.91 
                 | f 1  |/f 
                 1.20 
               
               
                 BFL/IH 
                 2.72 
                 f 1 /f 5   
                 −0.89 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 1 , the wide-angle lens assembly  11  of the eleventh embodiment can meet the requirements of optical performance as seen in  FIGS. 22A-22D . 
     It can be seen from  FIG. 22A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  11  of the eleventh embodiment ranges from −0.06 mm to 0.04 mm. It can be seen from  FIG. 22B  that the distortion in the wide-angle lens assembly  11  of the eleventh embodiment ranges from −13% to 0%. It can be seen from  FIG. 22C  that the root mean square spot radius is equal to 1.126 μm and geometrical spot radius is equal to 2.701 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.327 μm and geometrical spot radius is equal to 4.898 μm as image height is equal to 1.509 mm, and the root mean square spot radius is equal to 2.613 μm and geometrical spot radius is equal to 7.727 μm as image height is equal to 3.018 mm for the wide-angle lens assembly  11  of the eleventh embodiment. It can be seen from  FIG. 22D  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  11  of the eleventh embodiment ranges from 0.0 to 0.75 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature and the distortion of the wide-angle lens assembly  11  of the eleventh embodiment can be corrected effectively, and the resolution and the depth of focus of the wide-angle lens assembly  11  of the eleventh embodiment can meet the requirement. Therefore, the wide-angle lens assembly  11  of the eleventh embodiment is capable of good optical performance. 
     Referring to  FIG. 23 , the wide-angle lens assembly  12  includes a first lens L 121 , a sixth lens L 126 , a second lens L 122 , a stop ST 12 , a third lens L 123 , a fourth lens L 124 , a fifth lens L 125 , and an optical filter OF 12 , all of which are arranged in order from an object side to an image side along an optical axis OA 12 . In operation, an image of light rays from the object side is formed at an image plane IMA 12 . 
     According to paragraphs [0144], [0250]-[0256], wherein: the sixth lens L 126  is a biconcave lens with negative refractive power and made of plastic material, wherein the object side surface S 123  is a concave surface, the image side surface S 124  is a concave surface, and both of the object side surface S 123  and image side surface S 124  are aspheric surfaces; and both of the object side surface S 1214  and image side surface S 1215  of the optical filter OF 12  are plane surfaces. 
     With the above design of the lenses and stop ST 12  and at least any one of the conditions (6)-(10) satisfied, the wide-angle lens assembly  12  can have an effective decreased total lens length, an effective increased resolution, an effective corrected chromatic aberration, and is capable of an effective corrected aberration. 
     Table 29 shows the optical specification of the wide-angle lens assembly  12  in  FIG. 23 . 
     
       
         
           
               
             
               
                 TABLE 29 
               
             
            
               
                   
               
               
                 Effective Focal Length = 3.92 mm F-number = 2.4 
               
               
                 Total Lens Length = 18.69 mm Field of View = 81.412 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S121 
                 46.84 
                 1.00 
                 1.54  
                 56.12 
                 −5.13 
                 The First Lens L121 
               
               
                 S122 
                 2.58 
                 1.93 
                   
                   
                   
                   
               
               
                 S123 
                 −55.11 
                 0.50 
                 1.54  
                 56.12 
                 −7.84 
                 The Sixth Lens L126 
               
               
                 S124 
                 4.57 
                 0.25 
                   
                   
                   
                   
               
               
                 S125 
                 4.55 
                 2.77 
                 1.64 
                 23.53 
                 6.79 
                 The Second Lens L122 
               
               
                 S126 
                 −85.39 
                 0.88 
                   
                   
                   
                   
               
               
                 S127 
                 ∞ 
                 -0.10 
                   
                   
                   
                 Stop ST12 
               
               
                 S128 
                 14.54 
                 1.09 
                 1.54  
                 56.12 
                 4.90 
                 The Third Lens L123 
               
               
                 S129 
                 −3.13 
                 0.02 
                   
                   
                   
                   
               
               
                 S1210 
                 −4.55 
                 0.35 
                 1.64  
                 23.53 
                 −5.10 
                 The Fourth Lens L124 
               
               
                 S1211 
                 12.17 
                 0.11 
                   
                   
                   
                   
               
               
                 S1212 
                 19.28 
                 1.46 
                 1.54  
                 56.12 
                 5.55 
                 The Fifth Lens L125 
               
               
                 S1213 
                 −3.43 
                 7.78 
                   
                   
                   
                   
               
               
                 S1214 
                 ∞ 
                 0.21 
                 1.52  
                 64.17 
                   
                 Optical Filter OF12 
               
               
                 S1215 
                 ∞ 
                 0.40 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in table 29 is the same as that of in Table 23, and is not described here again. 
     In the twelfth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 30. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 30 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S121 
                 15.3161638 
                 0.0009408 
                 0.000093 
                 −0.0000116 
                 0.0000004 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S122 
                 −0.885804 
                 0.0035739 
                 0.0009657 
                 −0.0000103 
                 0.0000103 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S123 
                 −0.5589648 
                 0.0003789 
                 0.0002637 
                 −0.0000314 
                 0 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S124 
                 2.8375333 
                 0.0006462 
                 0.00058 
                 0.0000295 
                 0 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S125 
                 −3.2573632 
                 0.0048196 
                 0.0009845 
                 −0.0000205 
                 0.0000492 
               
               
                   
                   
                 −0.0000067 
                 0 
                 0 
               
               
                 S126 
                 −0.1073453 
                 0.006034 
                 0.000962 
                 0.0004804 
                 −0.0000916 
               
               
                   
                   
                 0.0000055 
                 0 
                 0 
               
               
                 S128 
                 −55.3373499 
                 0.000893 
                 0.0023911 
                 −0.0003813 
                 −0.0001643 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S129 
                 −0.3269725 
                 −0.0028112 
                 −0.0005785 
                 0.0003199 
                 −0.0000139 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S1210 
                 −23.8967329 
                 −0.0298676 
                 0.0051815 
                 −0.0018536 
                 0.0008799 
               
               
                   
                   
                 −0.0000535 
                 −0.0000064 
                 0 
               
               
                 S1211 
                 −156.3954852 
                 0.0093588 
                 −0.0060775 
                 0.0013421 
                 0.0000658 
               
               
                   
                   
                 −0.0000353 
                 0.0000037 
                 0 
               
               
                 S1212 
                 −206.8419484 
                 −0.0024283 
                 0.0063691 
                 −0.0045604 
                 0.0017237 
               
               
                   
                   
                 −0.0003663 
                 0.0000402 
                 −0.000002 
               
               
                 S1213 
                 −2.2301746 
                 −0.0057566 
                 0.0009997 
                 −0.0002512 
                 0.0001595 
               
               
                   
                   
                 −0.0000541 
                 0.0000088 
                 −0.0000007 
               
               
                   
               
            
           
         
       
     
     Table 31 shows the parameters and condition values for conditions (6)-(10) in accordance with the twelfth embodiment of the invention. It can be seen from Table 31 that the wide-angle lens assembly  12  of the twelfth embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 31 
               
               
                   
               
             
            
               
                 BFL 
                 8.39 mm 
                 IH 
                 3.0175 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.45 
                 TTL/IH 
                 6.19 
                 | f 1  |/f 
                 1.31 
               
               
                 BFL/IH 
                 2.78 
                 f 1 /f 5   
                 −0.924 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 12 , the wide-angle lens assembly  12  of the twelfth embodiment can meet the requirements of optical performance as seen in  FIGS. 24A-24D . 
     It can be seen from  FIG. 24A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  12  of the twelfth embodiment ranges from −0.06 mm to 0.04 mm. It can be seen from  FIG. 24B  that the distortion in the wide-angle lens assembly  12  of the twelfth embodiment ranges from −13% to 0%. It can be seen from  FIG. 24C  that the root mean square spot radius is equal to 1.037 μm and geometrical spot radius is equal to 2.675 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.991 μm and geometrical spot radius is equal to 7.342 μm as image height is equal to 1.509 mm, and the root mean square spot radius is equal to 3.880 μm and geometrical spot radius is equal to 17.837 μm as image height is equal to 3.018 mm for the wide-angle lens assembly  12  of the twelfth embodiment. It can be seen from  FIG. 24D  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  12  of the twelfth embodiment ranges from 0.0 to 0.78 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature and the distortion of the wide-angle lens assembly  12  of the twelfth embodiment can be corrected effectively, and the resolution and the depth of focus of the wide-angle lens assembly  12  of the twelfth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  12  of the twelfth embodiment is capable of good optical performance. 
     Referring to  FIG. 25 , the wide-angle lens assembly  13  includes a first lens L 131 , a second lens L 132 , a stop ST 13 , a third lens L 133 , a fourth lens L 134 , a fifth lens L 135 , and an optical filter OF 13 , all of which are arranged in order from an object side to an image side along an optical axis OA 13 . In operation, an image of light rays from the object side is formed at an image plane IMA 13 . 
     According to paragraphs [0144], [0250]-[0256], wherein: both of the object side surface S 1312  and image side surface S 1313  of the optical filter OF 13  are plane surfaces. 
     With the above design of the lenses and stop ST 13  and at least any one of the conditions (6)-(10) satisfied, the wide-angle lens assembly  13  can have an effective decreased total lens length, an effective increased resolution, an effective corrected chromatic aberration, and is capable of an effective corrected aberration. 
     Table 32 shows the optical specification of the wide-angle lens assembly  13  in  FIG. 25 . 
     
       
         
           
               
             
               
                 TABLE 32 
               
             
            
               
                   
               
               
                 Effective Focal Length = 3.44 mm F-number = 2.4 
               
               
                 Total Lens Length = 14.13 mm Field of View = 89.958 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S131 
                 28.128 
                 1 
                 1.5352 
                 56.1153 
                 −3.03 
                 The First Lens L131 
               
               
                 S132 
                 1.5207 
                 1.2336 
                   
                   
                   
                   
               
               
                 S133 
                 9.7744 
                 2.391 
                 1.6397 
                 23.5289 
                 12.28 
                 The Second Lens L132 
               
               
                 S134 
                 −37.6456 
                 0.5693 
                   
                   
                   
                   
               
               
                 S135 
                 ∞ 
                 −0.17 
                   
                   
                   
                 Stop ST13 
               
               
                 S136 
                 5.4028 
                 0.8771 
                 1.5352 
                 56.1153 
                 3.88 
                 The Third Lens L133 
               
               
                 S137 
                 −3.204 
                 0.682 
                   
                   
                   
                   
               
               
                 S138 
                 −5.4262 
                 0.3309 
                 1.6397 
                 23.5289 
                 −4.26 
                 The Fourth Lens L134 
               
               
                 S139 
                 5.6889 
                 0.1105 
                   
                   
                   
                   
               
               
                 S1310 
                 7.6414 
                 1.2095 
                 1.5352 
                 56.1153 
                 4.35 
                 The Fifth Lens L135 
               
               
                 S1311 
                 −3.1828 
                 5.58 
                   
                   
                   
                   
               
               
                 S1312 
                 ∞ 
                 0.21 
                 1.5168 
                 64.1673 
                   
                 Optical Filter OF13 
               
               
                 S1313 
                 ∞ 
                 0.4 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in table 32 is the same as that of in Table 23, and is not described here again. 
     In the thirteenth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 33. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 33 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S131 
                 35.7858423 
                 −0.0011627 
                 0.0000628 
                 −0.0000128 
                 0.0000007 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S132 
                 −0.6199112 
                 0.0040498 
                 0.001905 
                 0.0001154 
                 0.000114 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S133 
                 −22.8562195 
                 0.0024563 
                 0.0010324 
                 0.0000628 
                 0.0000661 
               
               
                   
                   
                 −0.0000142 
                 0 
                 0 
               
               
                 S134 
                 −1103.80427 
                 0.0062148 
                 0.0039612 
                 0.0006772 
                 −0.0002474 
               
               
                   
                   
                 0.000.1116 
                 0 
                 0 
               
               
                 S136 
                 0.8115018 
                 0.0024823 
                 0.0022463 
                 −0.0002488 
                 −0.0000531 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S137 
                 −0.1093024 
                 −0.0038448 
                 −0.0009207 
                 0.0001884 
                 −0.0000359 
               
               
                   
                   
                 0 
                 0 
                 0 
               
               
                 S138 
                 −19.8472466 
                 −0.0324739 
                 0.0044539 
                 −0.0020362 
                 0.0008045 
               
               
                   
                   
                 −0.0000913 
                 −0.00002 
                 0 
               
               
                 S139 
                 −37.7167556 
                 0.0107961 
                 −0.0063087 
                 0.0011593 
                 0.0000194 
               
               
                   
                   
                 −0.0000392 
                 0.0000036 
                 0 
               
               
                 S1310 
                 5.234827 
                 −0.0009657 
                 0.0069102 
                 −0.004419 
                 0.00173 
               
               
                   
                   
                 −0.0003761 
                 0.000037 
                 −0.0000017 
               
               
                 S1311 
                 −2.909845 
                 −0.0025451 
                 0.0026151 
                 0.0001165 
                 0.0002158 
               
               
                   
                   
                 −0.0000492 
                 0.0000074 
                 −0.000002 
               
               
                   
               
            
           
         
       
     
     Table 34 shows the parameters and condition values for conditions (6)-(10) in accordance with the thirteenth embodiment of the invention. It can be seen from Table 34 that the wide-angle lens assembly  13  of the thirteenth embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 34 
               
               
                   
               
             
            
               
                 BFL 
                 6.19 mm 
                 IH 
                 3.0175 mm 
                 | f 1  |/f 
                 0.88 
               
               
                 BFL/TTL 
                 0.44 
                 TTL/IH 
                 4.68 
               
               
                 BFL/IH 
                 2.05 
                 f 1 /f 5   
                 −0.697 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 13 , the wide-angle lens assembly  13  of the thirteenth embodiment can meet the requirements of optical performance as seen in  FIGS. 26A-26D . 
     It can be seen from  FIG. 26A  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  13  of the thirteenth embodiment ranges from −0.04 mm to 0.03 mm. It can be seen from  FIG. 26B  that the distortion in the wide-angle lens assembly  13  of the thirteenth embodiment ranges from −14% to 0%. It can be seen from  FIG. 26C  that the root mean square spot radius is equal to 0.499 μm and geometrical spot radius is equal to 0.840 μm as image height is equal to 0.000 mm, the root mean square spot radius is equal to 1.483 μm and geometrical spot radius is equal to 4.682 μm as image height is equal to 1.512 mm, and the root mean square spot radius is equal to 4.840 μm and geometrical spot radius is equal to 17.559 μm as image height is equal to 3.025 mm for the wide-angle lens assembly  13  of the thirteenth embodiment. It can be seen from  FIG. 26D  that the through focus modulation transfer function of tangential direction and sagittal direction in the wide-angle lens assembly  13  of the thirteenth embodiment ranges from 0.0 to 0.79 as focus shift ranges from −0.05 mm to 0.05 mm. 
     It is obvious that the field curvature and the distortion of the wide-angle lens assembly  13  of the thirteenth embodiment can be corrected effectively, and the resolution and the depth of focus of the wide-angle lens assembly  13  of the thirteenth embodiment can meet the requirement. Therefore, the wide-angle lens assembly  13  of the thirteenth embodiment is capable of good optical performance. 
     The fourteenth embodiment (not shown) is substantially the same as the tenth embodiment, so no longer describe. The difference is that the IH value of the fourteenth embodiment is 3.414 mm. Table 35 shows the parameters and condition values for conditions (6)-(10) in accordance with the fourteenth embodiment of the invention. It can be seen from Table 35 that the wide-angle lens assembly of the 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 35 
               
               
                   
               
             
            
               
                 BFL 
                 8.01 mm 
                 IH 
                 3.414 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.46 
                 TTL/IH 
                 5.14 
                 | f 1 |/f 
                 1.21 
               
               
                 BFL/IH 
                 2.35 
                 f 1 /f 5   
                 −0.91 
               
               
                   
               
            
           
         
       
     
     The fifteenth embodiment (not shown) is substantially the same as the eleventh embodiment, so no longer describe. The difference is that the IH value of the fifteenth embodiment is 3.414 mm. Table 36 shows the parameters and condition values for conditions (6)-(10) in accordance with the fifteenth embodiment of the invention. It can be seen from Table 36 that the wide-angle lens assembly of the fifteenth embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 36 
               
               
                   
               
             
            
               
                 BFL 
                 8.19 mm 
                 IH 
                 3.414 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.46 
                 TTL/1H 
                 5.23 
                 | f 1  |/f 
                 1.20 
               
               
                 BFL/IH 
                 2.4 
                 f 1 /f 5   
                 −0.89 
               
               
                   
               
            
           
         
       
     
     The sixteenth embodiment (not shown) is substantially the same as the twelfth embodiment, so no longer describe. The difference is that the IH value of the sixteenth embodiment is 3.414 mm. Table 37 shows the parameters and condition values for conditions (6)-(10) in accordance with the sixteenth embodiment of the invention. It can be seen from Table 37 that the wide-angle lens assembly of the sixteenth embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 37 
               
               
                   
               
             
            
               
                 BFL 
                 8.39 mm 
                 IH 
                 3.414 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.45 
                 TTL/IH 
                 5.47 
                 | f 1  |/f 
                 1.31 
               
               
                 BFL/IH 
                 2.46 
                 f 1 /f 5   
                 −0.924 
               
               
                   
               
            
           
         
       
     
     The seventeenth embodiment (not shown) is substantially the same as the thirteenth embodiment, so no longer describe. The difference is that the IH value of the seventeenth embodiment is 3.414 mm. Table 38 shows the parameters and condition values for conditions (6)-(10) in accordance with the seventeenth embodiment of the invention. It can be seen from Table 38 that the wide-angle lens assembly of the seventeenth embodiment satisfies the conditions (6)-(10). 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 38 
               
               
                   
               
             
            
               
                 BFL 
                 6.19 mm 
                 IH 
                 3.414 mm 
                   
                   
               
               
                 BFL/TTL 
                 0.44 
                 TTL/IH 
                 4.14 
                 | f 1  |/f 
                 0.88 
               
               
                 BFL/IH 
                 1.81 
                 f 1 /f 5   
                 −0.697 
               
               
                   
               
            
           
         
       
     
     In practical applications, the aboved tenth to seventeenth embodiments can be added a reflective element between the fifth lens and the optical filter, so as to deflect the light path and benefit the design of the mechanism to achieve effective space utilization. With the design of the aboved tenth to seventeenth embodiments and combine with any one of the conditions (1)-(5), the wide-angle lens assembly of the present invention can be applied not only to long-range shooting but also to close-range shooting (for example, about 5 cm, but not limited to this distance). 
     Referring to Table 39, Table 40, Table 42, Table 43, Table 45, Table 46, Table 48, Table 49, Table 51, and Table 52, wherein Table 39, Table 42, Table 45, Table 48, and Table 51 show optical specification in accordance with an eighteenth, nineteenth, twentieth, twenty-first, twenty-second embodiments of the invention respectively and Table 40, Table 43, Table 46, Table 49, and Table 52 show aspheric coefficients of each aspheric lens in Table 39, Table 42, Table 45, Table 48, and Table 51 respectively. 
       FIG. 27 ,  FIG. 29 ,  FIG. 31 ,  FIG. 33 , and  FIG. 35  are lens layout and optical path diagrams of the wide-angle lens assemblies in accordance with the eighteenth, nineteenth, twentieth, twenty-first, twenty-second embodiments of the invention respectively. 
     The first lenses L 181 , L 191 , L 201 , L 211 , L 221  are meniscus lenses with negative refractive power and made of glass material, wherein the object side surfaces S 181 , S 191 , S 201 , S 211 , S 221  are convex surfaces, the image side surfaces S 182 , S 192 , S 202 , S 212 , S 222  are concave surfaces, and the object side surfaces S 181 , S 191 , S 201 , S 211 , S 221  and the image side surfaces S 182 , S 192 , S 202 , S 212 , S 222  are spherical surfaces. 
     The sixth lenses L 186 , L 196 , L 206 , L 216 , L 226  are meniscus lenses with negative refractive power and made of plastic material, wherein the object side surfaces S 183 , S 193 , S 203 , S 213 , S 223  are convex surfaces, the image side surfaces S 184 , S 194 , S 204 , S 214 , S 224  are concave surfaces, and the object side surfaces S 183 , S 193 , S 203 , S 213 , S 223  and the image side surfaces S 184 , S 194 , S 204 , S 214 , S 224  are aspheric surfaces. 
     The second lenses L 182 , L 192 , L 202 , L 212 , L 222  are with positive refractive power and made of plastic material, wherein the the image side surfaces S 186 , S 196 , S 206 , S 216 , S 226  are convex surfaces, and the object side surfaces S 185 , S 195 , S 205 , S 215 , S 225  and the image side surfaces S 186 , S 196 , S 206 , S 216 , S 226  are aspheric surfaces. 
     The third lenses L 183 , L 193 , L 203 , L 213 , L 223  are biconvex lenses with positive refractive power and made of glass material, wherein the object side surfaces S 188 , S 198 , S 208 , S 218 , S 228  are convex surfaces, the image side surfaces S 189 , S 199 , S 209 , S 219 , S 229  are convex surfaces, and the object side surfaces S 188 , S 198 , S 208 , S 218 , S 228  and the image side surfaces S 189 , S 199 , S 209 , S 219 , S 229  are spherical surfaces. 
     The fourth lenses L 184 , L 194 , L 204 , L 214 , L 224  are biconcave lenses with negative refractive power and made of plastic material, wherein the object side surfaces S 1810 , S 1910 , S 2010 , S 2110 , S 2210  are concave surfaces, the image side surfaces S 1811 , S 1911 , S 2011 , S 2111 , S 2211  are concave surfaces, and the object side surfaces S 1810 , S 1910 , S 2010 , S 2110 , S 2210  and the image side surfaces S 1811 , S 1911 , S 2011 , S 2111 , S 2211  are aspheric surfaces. 
     The fifth lenses L 185 , L 195 , L 205 , L 215 , L 225  are biconvex lenses with positive refractive power and made of plastic material, wherein the object side surfaces S 1812 , S 1912 , S 2012 , S 2112 , S 2212  are convex surfaces, the image side surfaces S 1813 , S 1913 , S 2013 , S 2113 , S 2213  are convex surfaces, and the object side surfaces S 1812 , S 1912 , S 2012 , S 2112 , S 2212  and the image side surfaces S 1813 , S 1913 , S 2013 , S 2113 , S 2213  are aspheric surfaces. 
     In addition, the lens assemblies  18 ,  19 ,  20 ,  21 ,  22  satisfy at least one of the following conditions: 
       −8.3≤ f   162   /f≤ 14;  (11)
 
       4 mm ≤ f+f   3 ≤5 mm;  (12)
 
       −5.65 mm ≤( R   21   ×R   22 )/( R   21   +R   22 )≤−3.8 mm;  (13)
 
       0.5&lt;|(CRA−MRA)/CRA|&lt;1.02;  (14)
 
       −45 degrees/mm≤FOV/ f   1 ≤−22 degrees/mm;  (15)
 
       105≤ Vd   1   +Vd   3 ≤140;  (16)
 
       −5.1≤( f   6   +f   4 )/ f&lt;− 3.6;  (17)
 
       0.12≤ BFL/TTL≤ 0.23;  (18)
 
       9≤ TTL/T   3 ≤19;  (19)
 
     wherein f is an effective focal length of the wide-angle lens assembly  18 ,  19 ,  20 ,  21 ,  22  for the eighteenth to twenty-second embodiments, f 162  is an effective focal length of a combination of the first lenses L 181 , L 191 , L 201 , L 211 , L 221 , the sixth lenses L 186 , L 196 , L 206 , L 216 , L 226 , and the second lenses L 182 , L 192 , L 202 , L 212 , L 222  respectively for the eighteenth to twenty-second embodiments, f 3  is an effective focal length of the third lenses L 183 , L 193 , L 203 , L 213 , L 223  for the eighteenth to twenty-second embodiments, R 1  is a radius of curvature of the object side surfaces S 185 , S 195 , S 205 , S 215 , S 225  of the second lenses L 182 , L 192 , L 202 , L 212 , L 222  for the eighteenth to twenty-second embodiments, R is a radius of curvature of the image side surfaces S 186 , S 196 , S 206 , S 216 , S 226  of the second lenses L 182 , L 192 , L 202 , L 212 , L 222  respectively for the eighteenth to twenty-second embodiments, CRA is a chief ray angle of a maximum image height of the wide-angle lens assemblies  18 ,  19 ,  20 ,  21 ,  22  respectively for the eighteenth to twenty-second embodiments, MRA is a marginal ray angle of the maximum image height of the wide-angle lens assemblies  18 ,  19 ,  20 ,  21 ,  22  respectively for the eighteenth to twenty-second embodiments, FOV is a field of view of the wide-angle lens assemblies  18 ,  19 ,  20 ,  21 ,  22  respectively for the eighteenth to twenty-second embodiments, f 1  is an effective focal length of the first lenses L 181 , L 191 , L 201 , L 211 , L 221  for the eighteenth to twenty-second embodiments, Vd 1  is an Abbe number of the first lenses L 181 , L 191 , L 201 , L 211 , L 221  respectively for the eighteenth to twenty-second embodiments, Vd 3  is an Abbe number of the third lenses L 183 , L 193 , L 203 , L 213 , L 223  respectively for the eighteenth to twenty-second embodiments, f 6  is an effective focal length of the sixth lenses L 186 , L 196 , L 206 , L 216 , L 226  for the eighteenth to twenty-second embodiments, f 4  is an effective focal length of the fourth lenses L 184 , L 194 , L 204 , L 214 , L 224  for the eighteenth to twenty-second embodiments, BFL is an interval from the image side surfaces S 1813 , S 1913 , S 2013 , S 2115 , S 2215  of the lenses L 185 , L 195 , L 205 , L 217 , L 227  which are closest to the image side to the image planes IMA 18 , IMA 19 , IMA 20 , IMA 21 , IMA 22  along the optical axes OA 18 , OA 19 , OA 20 , OA 21 , OA 22  respectively for the eighteenth to twenty-second embodiments, TTL is an interval from the object side surfaces S 181 , S 191 , S 201 , S 211 , S 221  of the first lenses L 181 , L 191 , L 201 , L 211 , L 221  to the image planes IMA 18 , IMA 19 , IMA 20 , IMA 21 , IMA 22  along the optical axes OA 18 , OA 19 , OA 20 , OA 21 , OA 22  respectively for the eighteenth to twenty-second embodiments, and T 3  is a thickness of the third lenses L 183 , L 193 , L 203 , L 213 , L 223  along the optical axes OA 18 , OA 19 , OA 20 , OA 21 , OA 22  respectively for the eighteenth to twenty-second embodiments. With the lens assemblies  18 ,  19 ,  20 ,  21 ,  22  satisfying at least one of the above conditions (11)-(19), the total lens length can be effectively shortened, the field of view can be effectively increased, the chromatic aberration can be effectively corrected, and the aberration can be effectively corrected. 
     When the condition (11): −8.3≤f 162 /f≤14 is satisfied, the relative illumination of the wide-angle lens assembly can be increased. 
     When the condition (12): 4 mm≤f+f 3 ≤5 mm is satisfied, the refractive power of the third lens can be controlled so that the refractive power of the third lens is not too large, which is beneficial to the manufacturing of the third lens. 
     When the condition (13): −5.65 mm ≤(R 21 ×R 22 )/(R 21 +R 22 ) ≤−3.8 mm is satisfied, the manufacturing sensitivity of the second lens can be decreased to improve the manufacturing yield of the wide-angle lens assembly. 
     When the condition (14): 0.5&lt;|(CRA−MRA)/CRA|&lt;1.02 is satisfied, the marginal ray angle of the maximum image height can be adjusted to improve the illumination and image quality of the wide-angle lens assembly. 
     When the condition (15): −45 degrees/mm≤FOV/f 1 ≤−22 degrees/mm is satisfied, the refractive power of the first lens can be controlled so that the refractive power of the first lens is not too large, which is beneficial to the manufacturing of the first lens. 
     When the condition (16): 105≤Vd 1 +Vd 3 ≤140 is satisfied, the chromatic aberration of the wide-angle lens assembly can be reduced and the image quality can be improved. 
     When the condition (17): −5.1≤(f 6 +f 4 )/f&lt;−3.6 is satisfied, the manufacturing sensitivity of wide-angle lens assembly can be reduced to improve image quality. 
     When the condition (18): 0.12≤BFL/TTL ≤0.23 is satisfied, the back focal length can be increased, which is beneficial to the assembly and manufacturing of the wide-angle lens assembly. 
     When the condition (19): 9≤TTL/T 3 ≤19 is satisfied, the impact of temperature change on image quality can be reduced effectively, which is beneficial to the manufacture of wide-angle lens assembly. 
     A detailed description of a wide-angle lens assembly in accordance with an eighteenth embodiment of the invention is as follows. Referring to  FIG. 27 , the wide-angle lens assembly  18  includes a first lens L 181 , a sixth lens L 186 , a second lens L 182 , a stop ST 18 , a third lens L 183 , a fourth lens L 184 , a fifth lens L 185 , an optical filter OF 18 , and a cover glass CG 18 , all of which are arranged in order from an object side to an image side along an optical axis OA 18 . In operation, an image of light rays from the object side is formed at an image plane IMA 18 . 
     According to paragraphs [0144], [0311]-[0318], wherein: the second lens L 182  is a biconvex lens, wherein the object side surface S 185  is a convex surface; both of the object side surface S 1814  and image side surface S 1815  of the optical filter OF 18  are plane surfaces; and both of the object side surface S 1816  and image side surface S 1817  of the cover glass CG 18  are plane surfaces. 
     With the above design of the lenses and stop ST 18  and at least any one of the conditions (11)-(19) satisfied, the wide-angle lens assembly  18  can have an effective decreased total lens length, an effective increased field of view, an effective increased resolution, an effective corrected aberration, and is capable of effective corrected chromatic aberration. 
     Table 39 shows the optical specification of the wide-angle lens assembly  18  in  FIG. 27 . 
     
       
         
           
               
             
               
                 TABLE 39 
               
             
            
               
                   
               
               
                 Effective Focal Length = 1.5849 mm F-number = 2.0 
               
               
                 Total Lens Length = 13.5 mm Field of View = 200 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S181 
                 12.33 
                 1.50 
                 1.7 
                 54.7 
                 −5.06 
                 The First Lens L181 
               
               
                 S182 
                 2.70 
                 1.53 
                   
                   
                   
                   
               
               
                 S183 
                 4.57 
                 0.65 
                 1.5 
                 56.0 
                 −3.86 
                 The Sixth Lens L186 
               
               
                 S184 
                 1.37 
                 1.47 
                   
                   
                   
                   
               
               
                 S185 
                 19.18 
                 1.27 
                 1.6 
                 24.0 
                 5.19 
                 The Second Lens L182 
               
               
                 S186 
                 −3.92 
                 0.48 
                   
                   
                   
                   
               
               
                 S187 
                 ∞ 
                 0.21 
                   
                   
                   
                 Stop ST18 
               
               
                 S188 
                 4.46 
                 1.38 
                 1.6 
                 68.6 
                 3.39 
                 The Third Lens L183 
               
               
                 S189 
                 −3.26 
                 0.11 
                   
                   
                   
                   
               
               
                 S1810 
                 −7.22 
                 0.40 
                 1.7 
                 20.4 
                 −2.98 
                 The Fourth Lens L184 
               
               
                 S181.1 
                 2.80 
                 0.25 
                   
                   
                   
                   
               
               
                 S1812 
                 2.36 
                 1.28 
                 1.5 
                 56.0 
                 3.19 
                 The Fifth Lens L185 
               
               
                 S1813 
                 −5.35 
                 1.86 
                   
                   
                   
                   
               
               
                 S1814 
                 ∞ 
                 0.21 
                 1.5 
                 64 
                   
                 Optical Filter OF18 
               
               
                 S1815 
                 ∞ 
                 0.40 
                   
                   
                   
                   
               
               
                 S1816 
                 ∞ 
                 0.40 
                 1.5 
                 64 
                   
                 Cover Glass CG18 
               
               
                 S1817 
                 ∞ 
                 0.11 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in Table 39 is the same as that of in Table 23, and is not described here again. 
     In the eighteenth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 40. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 40 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S183 
                 −7.08 
                 −2.73E−02 
                 −2.11E−05  
                  2.26E−04 
                 3.72E−05 
               
               
                   
                   
                  1.71E−06 
                 −3.44E−07  
                 −2.37E−07 
               
               
                 S184 
                 −1.17 
                  2.87E−03 
                 6.21E−03 
                 −5.33E−03 
                 1.28E−03 
               
               
                   
                   
                 −1.20E−04 
                 4.16E−04 
                 −1.66E−04 
               
               
                 S185 
                 151.59 
                  1.84E−02 
                 −1.00E−03  
                  1.55E−03 
                 −6.86E−04  
               
               
                   
                   
                 −2.31E−04 
                 8.00E−05 
                  4.34E−05 
               
               
                 S186 
                 −12.86 
                 −9.26E−03 
                 2.84E−02 
                 −4.69E−02 
                 3.65E−02 
               
               
                   
                   
                  1.56E−02 
                 −3.89E−02  
                  1.61E−02 
               
               
                 S1810 
                 −86.23 
                  2.98E−02 
                 −2.89E−02  
                  2.32E−02 
                 −1.43E−02  
               
               
                   
                   
                 −1.18E−02 
                 2.40E−02 
                 −1.03E−02 
               
               
                 S1811 
                 0.39 
                  1.88E−02 
                 −4.15E−03  
                 −6.07E−03 
                 2.06E−03 
               
               
                   
                   
                  2.67E−03 
                 −2.20E−03  
                  3.80E−04 
               
               
                 S1812 
                 −5.57 
                 −5.15E−03 
                 4.28E−03 
                 −4.28E−04 
                 −5.76E−04  
               
               
                   
                   
                  4.02E−05 
                 1.05E−04 
                 −2.11E−05 
               
               
                 S1813 
                 −27.13 
                 −2.94E−02 
                 2.83E−03 
                 −2.57E−04 
                 1.63E−04 
               
               
                   
                   
                 −1.20E−04 
                 5.16E−08 
                  7.24E−06 
               
               
                   
               
            
           
         
       
     
     Table 41 shows the parameters and condition values for conditions (11)-(19) in accordance with the eighteenth embodiment of the invention. It can be seen from Table 41 that the wide-angle lens assembly  18  of the eighteenth embodiment satisfies the conditions (11)-(19). 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 41 
               
               
                   
               
             
            
               
                 f 162   
                 −12.08 mm 
                 CRA 
                 15.376 
                 degrees 
                 MRA 
                 7.06 
                 degrees 
               
               
                 f 162 /f 
                 −7.62 
                 f + f 3   
                 4.98 
                 mm 
                 (R 21  × R 22 )/ 
                 −4.92 
                 mm 
               
               
                   
                   
                   
                   
                   
                 (R 21  + R 22 ) 
               
            
           
           
               
               
               
               
               
               
               
            
               
                 | (CRA − 
                 0.540 
                 FOV/f 1   
                 −39.50 
                 degrees/mm 
                 Vd 1  + Vd 3   
                 123.3 
               
               
                 MRA)/CRA | 
               
            
           
           
               
               
               
               
               
               
            
               
                 (f 6  + f 4 )/f 
                 −4.32 
                 BTF/TTL 
                 0.22 
                 TTL/T 3   
                 9.76 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 18 , the wide-angle lens assembly  18  of the eighteenth embodiment can meet the requirements of optical performance as seen in  FIGS. 28A-28C . 
     It can be seen from  FIG. 28A  that the longitudinal aberration in the wide-angle lens assembly  18  of the eighteenth embodiment ranges from −0.01 mm to 0.025 mm. It can be seen from  FIG. 28B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  18  of the eighteenth embodiment ranges from −0.02 mm to 0.005 mm. It can be seen from  FIG. 28C  that the distortion in the wide-angle lens assembly  18  of the eighteenth embodiment ranges from −30% to 0%. 
     It is obvious that the longitudinal aberration, the field curvature and the distortion of the wide-angle lens assembly  18  of the eighteenth embodiment can be corrected effectively. Therefore, the wide-angle lens assembly  18  of the eighteenth embodiment is capable of good optical performance. 
     Referring to  FIG. 29 , the wide-angle lens assembly  19  includes a first lens L 191 , a sixth lens L 196 , a second lens L 192 , a stop ST 19 , a third lens L 193 , a fourth lens L 194 , a fifth lens L 195 , an optical filter OF 19 , and a cover glass CG 19 , all of which are arranged in order from an object side to an image side along an optical axis OA 19 . In operation, an image of light rays from the object side is formed at an image plane IMA 19 . 
     According to paragraphs [0144], [0311]-[0318], wherein: the second lens L 192  is a biconvex lens, wherein the object side surface S 195  is a convex surface; both of the object side surface S 1914  and image side surface S 1915  of the optical filter OF 19  are plane surfaces; and both of the object side surface S 1916  and image side surface S 1917  of the cover glass CG 19  are plane surfaces. 
     With the above design of the lenses and stop ST 19  and at least any one of the conditions (11)-(19) satisfied, the wide-angle lens assembly  19  can have an effective decreased total lens length, an effective increased field of view, an effective increased resolution, an effective corrected aberration, and is capable of effective corrected chromatic aberration. 
     Table 42 shows the optical specification of the wide-angle lens assembly  19  in  FIG. 29 . 
     
       
         
           
               
             
               
                 TABLE 42 
               
             
            
               
                   
               
               
                 Effective Focal Length = 1.353 mm F-number = 2.1 
               
               
                 Total Lens Length = 16.32 mm Field of View = 200 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface  
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S191 
                 18.00 
                 2.55 
                 1.7 
                 55.5 
                 −4.53 
                 The First Lens L191 
               
               
                 S192 
                 2.54 
                 1.86 
                   
                   
                   
                   
               
               
                 S193 
                 3.56 
                 1.44 
                 1.5 
                 56.1 
                 −4.12 
                 The Sixth Lens L196 
               
               
                 S194 
                 1.17 
                 1.08 
                   
                   
                   
                   
               
               
                 S195 
                 15.20 
                 2.39 
                 1.6 
                 24.0 
                 5.26 
                 The Second Lens L192 
               
               
                 S196 
                 −4.06 
                 0.19 
                   
                   
                   
                   
               
               
                 S197 
                 ∞ 
                 −0.03 
                   
                   
                   
                 Stop ST19 
               
               
                 S198 
                 3.72 
                 1.08 
                 1.49  
                 81.60 
                 3.45 
                 The Third Lens L193 
               
               
                 S199 
                 −2.88 
                 0.29 
                   
                   
                   
                   
               
               
                 S1910 
                 −5.07 
                 0.40 
                 1.7 
                 20.4 
                 −2.65 
                 The Fourth Lens L194 
               
               
                 S1911 
                 2.80 
                 0.12 
                   
                   
                   
                   
               
               
                 S1912 
                 2.70 
                 1.43 
                 1.5 
                 56.1 
                 2.79 
                 The Fifth Lens L195 
               
               
                 S1913 
                 −2.75 
                 1.90 
                   
                   
                   
                   
               
               
                 S1914 
                 ∞ 
                 0.21 
                 1.5 
                 64.0 
                   
                 Optical Filter OF19 
               
               
                 S1915 
                 ∞ 
                 0.40 
                   
                   
                   
                   
               
               
                 S1916 
                 ∞ 
                 0.40 
                 1.5 
                 64.0 
                   
                 Cover Glass CG19 
               
               
                 S1917 
                 ∞ 
                 0.11 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in Table 42 is the same as that of in Table 23, and is not described here again. 
     In the nineteenth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 43. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 43 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S193 
                 −3.91 
                 −1.73E−03 
                 −8.73E−04  
                 −7.71E−05 
                 −3.08E−06 
               
               
                   
                   
                  6.63E−07 
                 5.77E−08 
                  1.23E−08 
               
               
                 S194 
                 −1.08 
                  2.32E−02 
                 5.02E−03 
                 −1.42E−03 
                  7.21E−04 
               
               
                   
                   
                 −7.30E−04 
                 2.69E−04 
                  5.73E−05 
               
               
                 S195 
                 83.50 
                  1.49E−03 
                 5.55E−03 
                 −1.33E−03 
                 −4.45E−04 
               
               
                   
                   
                  3.66E−04 
                 1.12E−04 
                 −4.03E−05 
               
               
                 S196 
                 −12.71 
                 −1.95E−02 
                 1.60E−02 
                 −1.11E−02 
                 −4.29E−03 
               
               
                   
                   
                  1.31E−02 
                 −1.89E−03  
                 −3.21E−03 
               
               
                 S1910 
                 −0.21 
                 −1.62E−02 
                 1.12E−03 
                  1.36E−03 
                 −1.35E−03 
               
               
                   
                   
                  4.05E−04 
                 1.93E−04 
                 −1.41E−04 
               
               
                 S1911 
                 −5.77 
                 −9.53E−03 
                 4.56E−03 
                  1.74E−04 
                 −3.03E−04 
               
               
                   
                   
                 −4.71E−05 
                 −1.27E−05  
                  1.66E−05 
               
               
                 S1912 
                 −6.04 
                 −4.05E−03 
                 2.92E−03 
                  1.40E−04 
                 −1.89E−04 
               
               
                   
                   
                  8.55E−06 
                 8.43E−06 
                  2.52E−06 
               
               
                 S1913 
                 −2.89 
                 −7.93E−03 
                 3.54E−03 
                 −8.22E−04 
                  2.96E−04 
               
               
                   
                   
                 −4.80E−05 
                 −2.88E−06  
                  4.03E−06 
               
               
                   
               
            
           
         
       
     
     Table 44 shows the parameters and condition values for conditions (11)-(19) in accordance with the nineteenth embodiment of the invention. It can be seen from Table 44 that the wide-angle lens assembly  19  of the nineteenth embodiment satisfies the conditions (11)-(19). 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 44 
               
               
                   
               
             
            
               
                 f 162   
                 −9.61 mm 
                 CRA 
                 16.031 
                 degrees 
                 MRA 
                 6.013 
                 degrees 
               
               
                 f 162 /f 
                 −7.10 
                 f + f 3   
                 4.80 
                 mm 
                 (R 21  × R 22 )/ 
                 −5.54 
                 mm 
               
               
                   
                   
                   
                   
                   
                 (R 21  + R 22 ) 
               
            
           
           
               
               
               
               
               
               
               
            
               
                 | (CRA − 
                 0.624 
                 FOV/f 1   
                 −44.14 
                 degrees/mm 
                 Vd 1  + Vd 3   
                 137.1 
               
               
                 MRA)/CRA | 
               
            
           
           
               
               
               
               
               
               
            
               
                 (f 6  + f 4 )/f 
                 −5.00 
                 BTF/TTL 
                 0.19 
                 TTL/T 3   
                 14.70 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 19 , the wide-angle lens assembly  19  of the nineteenth embodiment can meet the requirements of optical performance as seen in  FIGS. 30A-30C . 
     It can be seen from  FIG. 30A  that the longitudinal aberration in the wide-angle lens assembly  19  of the nineteenth embodiment ranges from −0.005 mm to 0.005 mm. It can be seen from  FIG. 30B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  19  of the nineteenth embodiment ranges from −0.035 mm to 0.01 mm. It can be seen from  FIG. 30C  that the distortion in the wide-angle lens assembly  19  of the nineteenth embodiment ranges from −15% to 0%. 
     It is obvious that the longitudinal aberration, the field curvature and the distortion of the wide-angle lens assembly  19  of the nineteenth embodiment can be corrected effectively. Therefore, the wide-angle lens assembly  19  of the nineteenth embodiment is capable of good optical performance. 
     Referring to  FIG. 31 , the wide-angle lens assembly  20  includes a first lens L 201 , a sixth lens L 206 , a second lens L 202 , a stop ST 20 , a third lens L 203 , a fourth lens L 204 , a fifth lens L 205 , an optical filter OF 20 , and a cover glass CG 20 , all of which are arranged in order from an object side to an image side along an optical axis OA 20 . In operation, an image of light rays from the object side is formed at an image plane IMA 20 . 
     According to paragraphs [0144], [0311]-[0318], wherein: the second lens L 202  is a meniscus lens, wherein the object side surface S 205  is a concave surface: both of the object side surface S 2014  and image side surface S 2015  of the optical filter OF 20  are plane surfaces; and both of the object side surface S 2016  and image side surface S 2017  of the cover glass CG 20  are plane surfaces. 
     With the above design of the lenses and stop ST 20  and at least any one of the conditions (11)-(19) satisfied, the wide-angle lens assembly  20  can have an effective decreased total lens length, an effective increased field of view, an effective increased resolution, an effective corrected aberration, and is capable of effective corrected chromatic aberration. 
     Table 45 shows the optical specification of the wide-angle lens assembly  20  in  FIG. 31 . 
     
       
         
           
               
             
               
                 TABLE 45 
               
             
            
               
                   
               
               
                 Effective Focal Length = 1.5601 mm F-number = 2.0 
               
               
                 Total Lens Length = 12.62 mm Field of View = 200 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S201 
                 11.53 
                 0.97 
                 1.7 
                 54.7 
                 −8.61 
                 The First Lens L201 
               
               
                 S202 
                 3.93 
                 1.33 
                   
                   
                   
                   
               
               
                 S203 
                 8.96 
                 0.68 
                 1.5 
                 56.0 
                 −3.11 
                 The Sixth Lens L206 
               
               
                 S204 
                 1.39 
                 1.14 
                   
                   
                   
                   
               
               
                 S205 
                 −71.20 
                 2.32 
                 1.6 
                 24.0 
                 7.83 
                 The Second Lens L202 
               
               
                 S206 
                 −4.74 
                 0.23 
                   
                   
                   
                   
               
               
                 S207 
                 ∞ 
                 0.08 
                   
                   
                   
                 Stop ST20 
               
               
                 S208 
                 4.00 
                 0.81 
                 1.7 
                 53.2 
                 2.67 
                 The Third Lens L203 
               
               
                 S209 
                 −3.18 
                 0.46 
                   
                   
                   
                   
               
               
                 S2010 
                 -5.09 
                 0.41 
                 1.7 
                 19.2 
                 −2.62 
                 The Fourth Lens L204 
               
               
                 S2011 
                 2.81 
                 0.25 
                   
                   
                   
                   
               
               
                 S2012 
                 2.40 
                 1.47 
                 1.5 
                 56.1 
                 3.12 
                 The Fifth Lens L205 
               
               
                 S2013 
                 −4.35 
                 1.34 
                   
                   
                   
                   
               
               
                 S2014 
                 ∞ 
                 0.21 
                 1.5 
                 64.0 
                   
                 Optical Filter OF20 
               
               
                 S2015 
                 ∞ 
                 0.40 
                   
                   
                   
                   
               
               
                 S2016 
                 ∞ 
                 0.40 
                 1.5 
                 64.0 
                   
                 Cover Glass CG20 
               
               
                 S2017 
                 ∞ 
                 0.11 
               
               
                   
               
            
           
         
       
     
     The definition of a spheric surface sag z of each a spheric lens in Table 45 is the same as that of in Table 23, and is not described here again. 
     In the twentieth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 46. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 46 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S203 
                 −7.88 
                 −5.51E−03 
                 −7.66E−04  
                 −2.76E−05 
                  2.53E−05 
               
               
                   
                   
                 −2.30E−06 
                 3.27E−07 
                 −3.59E−08 
               
               
                 S204 
                 −0.77 
                  2.56E−02 
                 1.10E−02 
                 −3.96E−03 
                 −3.46E−04 
               
               
                   
                   
                  5.26E−04 
                 −3.97E−04  
                 −5.89E−05 
               
               
                 S205 
                 942.09 
                  1.19E−04 
                 7.66E−04 
                  2.39E−03 
                 −4.25E−03 
               
               
                   
                   
                 −2.31E−04 
                 1.64E−03 
                 −6.06E−04 
               
               
                 S206 
                 −14.11 
                 −6.26E−03 
                 2.00E−02 
                 −4.55E−02 
                  4.94E−02 
               
               
                   
                   
                  5.78E−03 
                 −4.60E−02  
                  2.28E−02 
               
               
                 S2010 
                 −58.05 
                 −1.36E−02 
                 −6.73E−04  
                  1.43E−03 
                 −8.81E−03 
               
               
                   
                   
                  9.20E−04 
                 6.27E−03 
                 −2.60E−03 
               
               
                 S2011 
                 0.29 
                  1.95E−02 
                 −1.70E−02  
                 −2.59E−04 
                  5.15E−03 
               
               
                   
                   
                 −1.28E−03 
                 −3.05E−03  
                  1.86E−03 
               
               
                 S2012 
                 −4.97 
                  7.18E−03 
                 3.69E−03 
                 −1.46E−03 
                 −4.74E−04 
               
               
                   
                   
                  1.44E−04 
                 8.56E−05 
                 −3.10E−05 
               
               
                 S2013 
                 −9.03 
                 −8.95E−03 
                 3.06E−03 
                 −6.10E−04 
                  3.46E−04 
               
               
                   
                   
                 −8.08E−05 
                 −2.22E−05  
                  3.93E−06 
               
               
                   
               
            
           
         
       
     
     Table 47 shows the parameters and condition values for conditions (11)-(19) in accordance with the twentieth embodiment of the invention. It can be seen from Table 47 that the wide-angle lens assembly  20  of the twentieth embodiment satisfies the conditions (11)-(19). 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 47 
               
               
                   
               
             
            
               
                 f 162   
                 −5.452 mm 
                 CRA 
                 16.337 
                 degrees 
                 MRA 
                 8.324 
                 degrees 
               
               
                 f 162 /f 
                 −3.49 
                 f + f 3   
                 4.23 
                 mm 
                 (R 21  × R 22 )/ 
                 −4.44 
                 mm 
               
               
                   
                   
                   
                   
                   
                 (R 21  + R 22 ) 
               
            
           
           
               
               
               
               
               
               
               
            
               
                 | (CRA − 
                 0.490 
                 FOV/f 1   
                 −23.23 
                 degrees/mm 
                 Vd 1  + Vd 3   
                 107.9 
               
               
                 MRA)/CRA | 
               
            
           
           
               
               
               
               
               
               
            
               
                 (f 6  + f 4 )/f 
                 −3.67 
                 BTF/TTL 
                 0.19 
                 TTL/T 3   
                 15.51 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 20 , the wide-angle lens assembly  20  of the twentieth embodiment can meet the requirements of optical performance as seen in  FIGS. 32A-32C . 
     It can be seen from  FIG. 32A  that the longitudinal aberration in the wide-angle lens assembly  20  of the twentieth embodiment ranges from −0.005 mm to 0.025 mm. It can be seen from  FIG. 32B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  20  of the twentieth embodiment ranges from −0.025 mm to 0.01 mm. It can be seen from  FIG. 32C  that the distortion in the wide-angle lens assembly  20  of the twentieth embodiment ranges from −30% to 0%. 
     It is obvious that the longitudinal aberration, the field curvature and the distortion of the wide-angle lens assembly  20  of the twentieth embodiment can be corrected effectively. Therefore, the wide-angle lens assembly  20  of the twentieth embodiment is capable of good optical performance. 
     Referring to  FIG. 33 , the wide-angle lens assembly  21  includes a first lens L 211 , a sixth lens L 216 , a second lens L 212 , a stop ST 21 , a third lens L 213 , a fourth lens L 214 , a fifth lens L 215 , a seventh lens L 217 , an optical filter OF 21 , and a cover glass CG 21 , all of which are arranged in order from an object side to an image side along an optical axis OA 21 . In operation, an image of light rays from the object side is formed at an image plane IMA 21 . 
     According to paragraphs [0144], [0311]-[0318], wherein: the second lens L 212  is a biconvex lens, wherein the object side surface S 215  is a convex surface; the seventh lens L 217  is a meniscus lens with positive refractive power and made of plastic material, wherein the object side surface S 2114  is a concave surface, the image side surface S 2115  is a convex surface, and both of the object side surface S 2114  and image side surface S 2115  are aspheric surfaces; both of the object side surface S 2116  and image side surface S 2117  of the optical filter OF 21  are plane surfaces; and both of the object side surface S 2118  and image side surface S 2119  of the cover glass CG 21  are plane surfaces. 
     With the above design of the lenses and stop ST 21  and at least any one of the conditions (11)-(19) satisfied, the wide-angle lens assembly  21  can have an effective decreased total lens length, an effective increased field of view, an effective increased resolution, an effective corrected aberration, and is capable of effective corrected chromatic aberration. 
     Table 48 shows the optical specification of the wide-angle lens assembly  21  in  FIG. 3 . 
     
       
         
           
               
             
               
                 TABLE 48 
               
             
            
               
                   
               
               
                 Effective Focal Length = 1.6121 mm F-number = 2.0 
               
               
                 Total Lens Length = 13.52 mm Field of View = 200 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S211 
                 12.24 
                 1.43 
                 1.7 
                 54.7 
                 −5.05 
                 The First Lens L211 
               
               
                 S212 
                 2.70 
                 1.52 
                   
                   
                   
                   
               
               
                 S213 
                 4.53 
                 0.64 
                 1.5 
                 56.0 
                 −3.91 
                 The Sixth Lens L216 
               
               
                 S214 
                 1.38 
                 1.47 
                   
                   
                   
                   
               
               
                 S215 
                 19.14 
                 1.27 
                 1.6 
                 24.0 
                 5.19 
                 The Second Lens L212 
               
               
                 S216 
                 −3.92 
                 0.48 
                   
                   
                   
                   
               
               
                 S217 
                 ∞ 
                 0.20 
                   
                   
                   
                 Stop ST21 
               
               
                 S218 
                 4.43 
                 1.38 
                 1.6 
                 68.6 
                 3.39 
                 The Third Lens L213 
               
               
                 S219 
                 −3.26 
                 0.10 
                   
                   
                   
                   
               
               
                 S2110 
                 −7.19 
                 0.40 
                 1.7 
                 20.4 
                 −2.97 
                 The Fourth Lens L214 
               
               
                 S2111 
                 2.80 
                 0.23 
                   
                   
                   
                   
               
               
                 S2112 
                 2.37 
                 0.95 
                 1.5 
                 56.0 
                 3.13 
                 The Fifth Lens L215 
               
               
                 S2113 
                 −5.31 
                 0.30 
                   
                   
                   
                   
               
               
                 S2114 
                 −5.31 
                 0.58 
                 1.5 
                 55.0 
                 334.22 
                 The Seventh Lens L217 
               
               
                 S2115 
                 −5.35 
                 1.45 
                   
                   
                   
                   
               
               
                 S2116 
                 ∞ 
                 0.21 
                 1.5 
                 64.0 
                   
                 Optical Filter OF21 
               
               
                 S2117 
                 ∞ 
                 0.40 
                   
                   
                   
                   
               
               
                 S2118 
                 ∞ 
                 0.40 
                 1.5 
                 64.0 
                   
                 Cover Glass CG21 
               
               
                 S2119 
                 ∞ 
                 0.11 
               
               
                   
               
            
           
         
       
     
     The definition of a spheric surface sag z of each a spheric lens in Table 48 is the same as that of in Table 23, and is not described here again. 
     In the twenty-first embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 49. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 49 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S213 
                 −7.1 
                 −2.74E−02  
                 −1.66E−05  
                  2.30E−04 
                 3.78E−05 
               
               
                   
                   
                 1.72E−06 
                 −3.26E−07  
                 −2.33E−07 
               
               
                 S214 
                 −1.2 
                 2.74E−03 
                 6.16E−03 
                 −5.26E−03 
                 1.27E−03 
               
               
                   
                   
                 −1.13E−04  
                 4.20E−04 
                 −1.63E−04 
               
               
                 S215 
                 151.1 
                 1.84E−02 
                 −1.03E−03  
                  1.46E−03 
                 −7.16E−04  
               
               
                   
                   
                 −2.49E−04  
                 6.71E−05 
                  3.70E−05 
               
               
                 S216 
                 −12.7 
                 −9.37E−03  
                 2.83E−02 
                 −4.69E−02 
                 3.64E−02 
               
               
                   
                   
                 1.55E−02 
                 −3.89E−02  
                  1.60E−02 
               
               
                 S2110 
                 −87.5 
                 3.02E−02 
                 −2.88E−02  
                  2.32E−02 
                 −1.40E−02  
               
               
                   
                   
                 −1.15E−02  
                 2.40E−02 
                 −1.05E−02 
               
               
                 S2111 
                 0.4 
                 1.90E−02 
                 −4.30E−03  
                 −6.24E−03 
                 1.98E−03 
               
               
                   
                   
                 2.65E−03 
                 −2.19E−03  
                  3.62E−04 
               
               
                 S2112 
                 −5.6 
                 −5.13E−03  
                 4.26E−03 
                 −4.43E−04 
                 −5.69E−04  
               
               
                   
                   
                 5.34E−05 
                 1.11E−04 
                 −2.11E−05 
               
               
                 S2113 
                 0.0 
                 7.44E−05 
                 3.46E−05 
                  1.02E−05 
                 0.00E+00 
               
               
                   
                   
                 0.00E+00 
                 0.00E+00 
                  0.00E+00 
               
               
                 S2114 
                 0.0 
                 −1.09E−04  
                 −3.63E−05  
                 −7.98E−06 
                 0.00E+00 
               
               
                   
                   
                 0.00E+00 
                 0.00E+00 
                  0.00E+00 
               
               
                 S2115 
                 −27.9 
                 −2.92E−02  
                 2.91E−03 
                 −2.45E−04 
                 1.64E−04 
               
               
                   
                   
                 −1.19E−04  
                 −2.30E−07  
                  7.21E−06 
               
               
                   
               
            
           
         
       
     
     Table 50 shows the parameters and condition values for conditions (11)-(19) in accordance with the twenty-first embodiment of the invention. It can be seen from Table 50 that the wide-angle lens assembly  21  of the twenty-first embodiment satisfies the conditions (11)-(19). 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 50 
               
               
                   
               
             
            
               
                 f 162   
                 −12.437 mm 
                 CRA 
                 14.129 
                 degrees 
                 MRA 
                 6.436 
                 degrees 
               
               
                 f 162 /f 
                 −7.74 
                 f + f 3   
                 4.99 
                 mm 
                 (R 21  × R 22 )/ 
                 −4.92 
                 mm 
               
               
                   
                   
                   
                   
                   
                 (R 21  + R 22 ) 
               
            
           
           
               
               
               
               
               
               
               
            
               
                 | (CRA − 
                 0.544 
                 FOV/f 1   
                 −39.64 
                 degrees/mm 
                 Vd 1  + Vd 3   
                 123.3 
               
               
                 MRA)/CRA | 
               
            
           
           
               
               
               
               
               
               
            
               
                 (f 6  + f 4 )/f 
                 −4.28 
                 BTF/TTL 
                 0.19 
                 TTL/T 3   
                 9.80 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 21 , the wide-angle lens assembly  21  of the twenty-first embodiment can meet the requirements of optical performance as seen in  FIGS. 34A-34C . 
     It can be seen from  FIG. 34A  that the longitudinal aberration in the wide-angle lens assembly  21  of the twenty-first embodiment ranges from −0.01 mm to 0.035 mm. It can be seen from  FIG. 34B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  21  of the twenty-first embodiment ranges from −0.015 mm to 0.025 mm. It can be seen from  FIG. 34C  that the distortion in the wide-angle lens assembly  21  of the twenty-first embodiment ranges from −30% to 0%. 
     It is obvious that the longitudinal aberration, the field curvature and the distortion of the wide-angle lens assembly  21  of the twenty-first embodiment can be corrected effectively. Therefore, the wide-angle lens assembly  21  of the twenty-first embodiment is capable of good optical performance. 
     Referring to  FIG. 35 , the wide-angle lens assembly  22  includes a first lens L 221 , a sixth lens L 226 , a second lens L 222 , a stop ST 22 , a third lens L 223 , a fourth lens L 224 , a fifth lens L 225 , a seventh lens L 227 , an optical filter OF 22 , and a cover glass CG 22 , all of which are arranged in order from an object side to an image side along an optical axis OA 22 . In operation, an image of light rays from the object side is formed at an image plane IMA 22 . 
     According to paragraphs [0144], [0311]-[0318], wherein: the second lens L 222  is a biconvex lens, wherein the object side surface S 225  is a convex surface; the seventh lens L 227  is a biconcave lens with negative refractive power and made of plastic material, wherein the object side surface S 2214  is a concave surface, the image side surface S 2215  is a concave surface, and both of the object side surface S 2214  and image side surface S 2215  are aspheric surfaces; both of the object side surface S 2216  and image side surface S 2217  of the optical filter OF 22  are plane surfaces; and both of the object side surface S 2218  and image side surface S 2219  of the cover glass CG 22  are plane surfaces. 
     With the above design of the lenses and stop ST 22  and at least any one of the conditions (11)-(19) satisfied, the wide-angle lens assembly  22  can have an effective decreased total lens length, an effective increased field of view, an effective increased resolution, an effective corrected aberration, and is capable of effective corrected chromatic aberration. 
     Table 51 shows the optical specification of the wide-angle lens assembly  22  in  FIG. 35 . 
     
       
         
           
               
             
               
                 TABLE 51 
               
             
            
               
                   
               
               
                 Effective Focal Length = 1.4527 mm F-number = 1.98 
               
               
                 Total Lens Length = 12.6 mm Field of View = 205 degrees 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                   
                   
                   
                   
                 Effective 
                   
               
               
                   
                 Radius of 
                   
                   
                   
                 Focal 
                   
               
               
                 Surface 
                 Curvature 
                 Thickness 
                   
                   
                 Length 
                   
               
               
                 Number 
                 (mm) 
                 (mm) 
                 Nd 
                 Vd 
                 (mm) 
                 Remark 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S221 
                 10.44 
                 0.76 
                 1.7 
                 54.7 
                 −8.69 
                 The First Lens L221 
               
               
                 S222 
                 3.83 
                 1.29 
                   
                   
                   
                   
               
               
                 S223 
                 2.80 
                 0.59 
                 1.5 
                 56.0 
                 −3.43 
                 The Sixth Lens L226 
               
               
                 S224 
                 1.04 
                 1.54 
                   
                   
                   
                   
               
               
                 S225 
                 24.76 
                 2.71 
                 1.6 
                 24.0 
                 4.84 
                 The Second Lens L222 
               
               
                 S226 
                 −3.39 
                 0.37 
                   
                   
                   
                   
               
               
                 S227 
                 ∞ 
                 −0.10 
                   
                   
                   
                 Stop ST22 
               
               
                 S228 
                 4.67 
                 0.68 
                 1.7 
                 54.7 
                 2.66 
                 The Third Lens L223 
               
               
                 S229 
                 −3.14 
                 0.12 
                   
                   
                   
                   
               
               
                 S2210 
                 −8.53 
                 0.40 
                 1.7 
                 20.4 
                 −2.13 
                 The Fourth Lens L224 
               
               
                 S2211 
                 1.73 
                 0.23 
                   
                   
                   
                   
               
               
                 S2212 
                 2.20 
                 1.67 
                 1.5 
                 56.1 
                 2.62 
                 The Fifth Lens L225 
               
               
                 S2213 
                 −2.87 
                 0.31 
                   
                   
                   
                   
               
               
                 S2214 
                 −17.16 
                 0.47 
                 1.7 
                 20.4 
                 −10.69 
                 The Seventh Lens L227 
               
               
                 S2215 
                 12.34 
                 0.49 
                   
                   
                   
                   
               
               
                 S2216 
                 ∞ 
                 0.21 
                 1.5 
                 64.0 
                   
                 Optical Filter OF22 
               
               
                 S2217 
                 ∞ 
                 0.40 
                   
                   
                   
                   
               
               
                 S2218 
                 ∞ 
                 0.40 
                 1.5 
                 64.0 
                   
                 Cover Glass CG22 
               
               
                 S2219 
                 ∞ 
                 0.11 
               
               
                   
               
            
           
         
       
     
     The definition of aspheric surface sag z of each aspheric lens in Table 51 is the same as that of in Table 23, and is not described here again. 
     In the twenty-second eighteenth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each aspheric lens are shown in Table 52. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 52 
               
               
                   
               
               
                 Surface 
                   
                 A 
                 B 
                 C 
                   
               
               
                 Number 
                 k 
                 E 
                 F 
                 G 
                 D 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 S223 
                 −6.11 
                 −1.87E−03 
                 −5.30E−04  
                 −4.12E−05 
                  2.40E−06 
               
               
                   
                   
                  1.08E−06 
                 −6.87E−09  
                 −6.01E−09 
               
               
                 S224 
                 −1.03 
                  8.87E−03 
                 1.32E−02 
                  1.34E−03 
                  1.01E−03 
               
               
                   
                   
                 −1.03E−03 
                 9.47E−05 
                 −5.25E−05 
               
               
                 S225 
                 6.94 
                 −9.22E−03 
                 2.49E−03 
                 −1.94E−03 
                 −9.30E−04 
               
               
                   
                   
                  3.97E−05 
                 4.01E−05 
                 −3.35E−05 
               
               
                 S226 
                 −12.33 
                 −2.35E−02 
                 1.43E−02 
                 −9.16E−03 
                 −4.03E−03 
               
               
                   
                   
                  1.64E−02 
                 −1.04E−02  
                  1.78E−03 
               
               
                 S2210 
                 2.59 
                 −2.26E−02 
                 −5.04E−03  
                  5.35E−03 
                  3.78E−04 
               
               
                   
                   
                 −1.25E−04 
                 −4.98E−04  
                 −1.06E−03 
               
               
                 S2211 
                 −3.57 
                 −9.88E−04 
                 5.96E−03 
                  2.07E−04 
                 −3.58E−04 
               
               
                   
                   
                 −2.95E−04 
                 −2.15E−04  
                  8.86E−05 
               
               
                 S2212 
                 −4.93 
                 −4.06E−03 
                 3.26E−03 
                  3.14E−04 
                 −2.40E−04 
               
               
                   
                   
                  1.10E−05 
                 1.86E−05 
                 −2.40E−06 
               
               
                 S2213 
                 −3.64 
                 −1.22E−02 
                 2.71E−03 
                 −5.35E−04 
                  3.81E−04 
               
               
                   
                   
                 −5.20E−05 
                 −9.39E−06  
                  4.44E−06 
               
               
                 S2214 
                 0.00 
                 −5.39E−04 
                 6.09E−04 
                  4.62E−05 
                 −1.20E−05 
               
               
                   
                   
                 −6.05E−06 
                 0.00E+00 
                  0.00E+00 
               
               
                 S2215 
                 0.00 
                 −2.33E−03 
                 −1.31E−03  
                 −1.84E−04 
                 −1.49E−05 
               
               
                   
                   
                  2.30E−06 
                 0.00E+00 
                  0.00E+00 
               
               
                   
               
            
           
         
       
     
     Table 53 shows the parameters and condition values for conditions (11)-(19) in accordance with the twenty-second embodiment of the invention. It can be seen from Table 53 that the wide-angle lens assembly  22  of the twenty-second embodiment satisfies the conditions (11)-(19). 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 53 
               
               
                   
               
             
            
               
                 f 162   
                 19.583 mm 
                 CRA 
                 19.918 
                 degrees 
                 MRA 
                 1.749 
                 degrees 
               
               
                 f 162 /f 
                 13.48 
                 f + f 3   
                 4.12 
                 mm 
                 (R 21  × R 22 )/ 
                 −3.93 
                 mm 
               
               
                   
                   
                   
                   
                   
                 (R 21  + R 22 ) 
               
            
           
           
               
               
               
               
               
               
               
            
               
                 | (CRA − 
                 0.912 
                 FOV/f 1   
                 −23.58 
                 degrees/mm 
                 Vd 1  + Vd 3   
                 109.3 
               
               
                 MRA)/CRA | 
               
            
           
           
               
               
               
               
               
               
            
               
                 (f 6  + f 4 )/f 
                 −3.83 
                 BTF/TTL 
                 0.13 
                 TTL/T 3   
                 18.56 
               
               
                   
               
            
           
         
       
     
     By the above arrangements of the lenses and stop ST 22 , the wide-angle lens assembly  22  of the twenty-second embodiment can meet the requirements of optical performance as seen in  FIGS. 36A-36C . 
     It can be seen from  FIG. 36A  that the longitudinal aberration in the wide-angle lens assembly  22  of the twenty-second embodiment ranges from −0.005 mm to 0.025 mm. It can be seen from  FIG. 36B  that the field curvature of tangential direction and sagittal direction in the wide-angle lens assembly  22  of the twenty-second embodiment ranges from −0.025 mm to 0.005 mm. It can be seen from  FIG. 36C  that the distortion in the wide-angle lens assembly  22  of the twenty-second embodiment ranges from −30% to 0%. 
     It is obvious that the longitudinal aberration, the field curvature and the distortion of the wide-angle lens assembly  22  of the twenty-second embodiment can be corrected effectively. Therefore, the wide-angle lens assembly  22  of the twenty-second embodiment is capable of good optical performance. 
     While the invention has been described by way of example and in terms of the preferred embodiment(s), it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.