Patent Publication Number: US-2023161137-A1

Title: Optical imaging lens

Description:
BACKGROUND OF THE INVENTION 
     Technical Field 
     The present invention generally relates to an optical image capturing system, and more particularly to an optical imaging lens, which provides a better optical performance of high image quality and low distortion. 
     Description of Related Art 
     In recent years, with advancements in portable electronic devices having camera functionalities, the demand for an optical image capturing system is raised gradually. The image sensing device of the ordinary photographing camera is commonly selected from a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor sensor (CMOS Sensor). Besides, as advanced semiconductor manufacturing technology enables the minimization of the pixel size of the image sensing device, the development of the optical image capturing system towards the field of high pixels. Moreover, with the advancement in drones and driverless autonomous vehicles, Advanced Driver Assistance System (ADAS) plays an important role, collecting environmental information through various lenses and sensors to ensure the driving safety of the driver. Furthermore, as the image quality of the automotive lens changes with the temperature of an external application environment, the temperature requirements of the automotive lens also increase. Therefore, the requirement for high imaging quality is rapidly raised. 
     Good imaging lenses generally have the advantages of low distortion, high resolution, etc. In practice, small size and cost must be considered. Therefore, it is a big problem for designers to design a lens with good imaging quality under various constraints. 
     BRIEF SUMMARY OF THE INVENTION 
     In view of the reasons mentioned above, the primary objective of the present invention is to provide an optical imaging lens that provides a better optical performance of high image quality and low distortion. 
     The present invention provides an optical imaging lens, in order from an object side to an image side along an optical axis, including a first optical assembly having negative refractive power, a second optical assembly having positive refractive power, a third optical assembly having positive refractive power, an aperture, a fourth optical assembly having positive refractive power, and a fifth optical assembly having positive refractive power, wherein two of the first optical assembly, the second optical assembly, the third optical assembly, the fourth optical assembly, and the fifth optical assembly include a compound lens formed by adhering at least two lenses, while the others are single lens. 
     The present invention further provides an optical imaging lens, in order from an object side to an image side along an optical axis, includes a first lens having negative refractive power, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having positive refractive power, an aperture, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having positive refractive power. An object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface. The object-side surface of the first lens and/or the image-side surface of the first lens are/is an aspheric surface. The second lens is a biconcave lens. The third lens is a biconvex lens. An object-side surface of the third lens and an image-side surface of the second lens are adhered to form a compound lens with positive refractive power. An object-side surface of the fourth lens is a convex surface. An object-side surface of the fifth lens is a convex surface. The seventh lens is a biconvex lens. An object-side surface of the seventh lens and/or an image-side surface of the seventh lens are/is an aspheric surface. 
     With the aforementioned design, the optical imaging lens has a total of seventh lenses with refractive powerand includes two compound lenses formed by adhering at least two of the lenses, thereby achieving the effect of high image quality and low distortion.In addition, the arrangement of the refractive powers and the conditions of the optical imaging lens of the present invention could achieve the effect of high image quality. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
       The present invention will be best understood by referring to the following detailed description of some illustrative embodiments in conjunction with the accompanying drawings, in which 
         FIG.  1 A  is a schematic view of the optical imaging lens according to a first embodiment of the present invention; 
         FIG.  1 B  is a diagram showing the astigmatic field curvature of the optical imaging lens according to the first embodiment of the present invention; 
         FIG.  1 C  is a diagram showing the distortion of the optical imaging lens according to the first embodiment of the present invention; 
         FIG.  1 D  is a diagram showing the modulus of the OTF of the optical imaging lens according to the first embodiment of the present invention; 
         FIG.  2 A  is a schematic view of the optical imaging lens according to a second embodiment of the present invention; 
         FIG.  2 B  is a diagram showing the astigmatic field curvature of the optical imaging lens according to the second embodiment of the present invention; 
         FIG.  2 C  is a diagram showing the distortion of the optical imaging lens according to the second embodiment of the present invention; 
         FIG.  2 D  is a diagram showing the modulus of the OTF of the optical imaging lens according to the second embodiment of the present invention; 
         FIG.  3 A  is a schematic view of the optical imaging lens according to a third embodiment of the present invention; 
         FIG.  3 B  is a diagram showing the astigmatic field curvature of the optical imaging lens according to the third embodiment of the present invention; 
         FIG.  3 C  is a diagram showing the distortion of the optical imaging lens according to the third embodiment of the present invention; and 
         FIG.  3 D  is a diagram showing the modulus of the OTF of the optical imaging lens according to the third embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     An optical imaging lens  100  according to a first embodiment of the present invention is illustrated in  FIG.  1 A , which includes, in order along an optical axis Z from an object side to an image side, a first optical assembly C 1 , a second optical assembly C 2 , a third optical assembly C 3 , an aperture ST, a fourth optical assembly C 4 , and a fifth optical assembly C 5 , wherein two of the first optical assembly, the second optical assembly, the third optical assembly, the fourth optical assembly, and the fifth optical assembly include a compound lens with at least two lenses that are adhered, while the others are single lens. In the current embodiment, the second optical assembly C 2  and the fourth optical assembly C 4  are respectively a compound lens, while the first optical assembly C 1 , the third optical assembly C 3 , and the fifth optical assembly C 5  are respectively a single lens. 
     The first optical assembly C 1  has negative refractive power. In the current embodiment, the first optical assembly C 1  is a single lens that includes a first lens L 1 , wherein the first lens L 1  is a negative meniscus; an object-side surface S 1  of the first lens L 1  is a convex surface toward the object side, and an image-side surface S 2  of the first lens L 1  is a concave surface toward the image side; the object-side surface S 1 , the image-side surface S 2 , or both of the object-side surface S 1  and the image-side surface S 2  of the first lens L 1  are aspheric surfaces. As shown in  FIG.  1 A , both of the object-side surface S 1  and the image-side surface S 2  of the first lens L 1  are aspheric surfaces, and a part of a surface of the first lens L 1  toward the image side is recessed to form the image-side surface S 2 , and the optical axis Z passes through the object-side surface S 1  and the image-side surface S 2  of the first lens L 1 . 
     The second optical assembly C 2  has positive refractive power. In the current embodiment, the second optical assembly C 2  is a compound lens formed by adhering a second lens L 2  and a third lens L 3 , wherein the second lens L 2  is a biconcave lens with negative refractive power (i.e., both of an object-side surface S 3  of the second lens L 2  and an image-side surface S 4  of the second lens L 2  are concave surfaces). As shown in  FIG.  1 A , a part of a surface of the second lens L 2  toward the object side is recessed to form the object-side surface S 3 , and the optical axis Z passes through the object-side surface S 3  and the image-side surface S 4  of the second lens L 2 . 
     The third lens L 3  is a biconvex lens (i.e., both of an object-side surface S 5  of the third lens L 3  and an image-side surface S 6  of the third lens L 3  are convex surfaces) with positive refractive power. In the current embodiment, a part of a surface of the third lens L 3  toward the object side is convex to form the object-side surface S 5 , and a surface of the third lens L 3  toward the image side is convex to form the image-side surface S 6 , and the optical axis Z passes through the object-side surface S 5  and the image-side surface S 6  of the third lens L 3 , wherein the object-side surface S 5  of the third lens L 3  and the image-side surface S 4  of the second lens L 2  are adhered to form a same surface. 
     The third optical assembly C 3  has positive refractive power. In the current embodiment, the third optical assembly C 3  is a single lens that includes a fourth lens L 4 , wherein the fourth lens L 4  is a biconvex lens (i.e., both of an object-side surface S 7  of the fourth lens L 4  and an image-side surface S 8  of the fourth lens L 4  are convex surfaces). As shown in  FIG.  1 A , the object-side surface S 7  of the fourth lens L 4  is convex toward the object side in an arc shape, and the image-side surface S 8  of the fourth lens L 4  is slightly convex toward the image side. 
     The fourth optical assembly C 4  has positive refractive power. In the current embodiment, the fourth optical assembly C 4  is a compound lens formed by adhering a fifth lens L 5  and a sixth lens L 6 , wherein the fifth lens L 5  is a negative meniscus; an object-side surface S 9  of the fifth lens L 5  is a convex surface toward the object side, and an image-side surface S 10  of the fifth lens L 5  is a concave surface toward the image side. As shown in  FIG.  1 A , a part of a surface of the fifth lens L 5  toward the image side is recessed to form the image-side surface S 10 , and the optical axis Z passes through the object-side surface S 9  and the image-side surface S 10  of the fifth lens L 5 . 
     The sixth lens L 6  is a biconvex lens (i.e., both of an object-side surface S 11  of the sixth lens L 6  and an image-side surface S 12  of the sixth lens L 6  are convex surfaces) with positive refractive power. In the current embodiment, a surface of the sixth lens L 6  toward the object side is convex to form the obj ect-side surface S 11 , and a surface of the sixth lens L 6  toward the image side is slightly convex to form the image-side surface S 12 , wherein the object-side surface S 11  of the sixth lens L 6  and the image-side surface S 10  of the fifth lens L 5  are adhered to form a same surface. 
     The fifth optical assembly C 5  has positive refractive power. In the current embodiment, the fifth optical assembly C 5  is a single lens that includes a seventh lens L 7 , wherein the seventh lens L 7  is a biconvex lens (i.e., both of an object-side surface S 13  of the seventh lens L 7  and an image-side surface S 14  of the seventh lens L 7  are convex surfaces) with positive refractive power; the object-side surface S 13 , the image-side surface S 14 , or both of the object-side surface S 13  and the image-side surface S 14  of the seventh lens L 7  are aspheric surfaces. As shown in  FIG.  1 A , both of the object-side surface S 13  and the image-side surface S 14  of the seventh lens L 7  are aspheric surfaces, and a surface of the seventh lens L 7  toward the object side is slightly convex to form the object-side surface S 13 , and a surface of the seventh lens L 7  toward the image side is convex to form the image-side surface S 14 . 
     Additionally, the optical imaging lens  100  further includes an infrared filter L 8  and a protective glass L 9 , wherein the infrared filter L 8  is disposed between the seventh lens L 7  and the protective glass L 9  and is closer to the image-side surface S 14  of the seventh lens L 7  than the protective glass L 9 , thereby filtering out excess infrared rays in an image light passing through the optical imaging lens  100  to improve imaging quality. The protective glass L 9  for protecting the infrared filter L 8  is disposed between the infrared filter L 8  and an image plane Im of the optical imaging lens  100  and is closer to the image plane Im than the infrared filter L 8 . 
     In order to keep the optical imaging lens  100  in good optical performance and high imaging quality, the optical imaging lens  100  further satisfies: 
     
       
         
           
             − 
             0.48 
             &gt; 
             fl 
             / 
             F&gt;-0 
             .53; 
           
         
       
     
     
       
         
           
             0.18 
             &gt; 
             f23 
             / 
             F&gt;0 
             .13; 
               
             -0 
             .35&gt;f2 
             / 
             F&gt;-0 
             .42; 
               
             0 
             .35&gt;f3 
             / 
             F&gt;0 
             .25; 
           
         
       
     
     
       
         
           
             0.35 
             &gt; 
             f4 
             / 
             F&gt;0 
             .3; 
           
         
       
     
     
       
         
           
             0.15 
             &gt; 
             f56 
             / 
             F&gt;0 
             .05; 
               
             -0 
             .05&gt;f5 
             / 
             F&gt;-0 
             .15; 
               
             0 
             .3&gt;f6 
             / 
             F&gt;0 
             .2; 
           
         
       
     
     
       
         
           
             0.37 
             &gt; 
             f7 
             / 
             F&gt;0 
             .3; 
           
         
       
     
     wherein F is a focal length of the optical imaging lens  100 ; f1 is a focal length of the first lens L 1  of the first optical assembly C 1 ; f23 is a focal length of the second optical assembly C 2 ; f2 is a focal length of the second lens L 2  of the second optical assembly C 2 ; f3 is a focal length of the third lens L 3  of the second optical assembly C 2 ; f4 is a focal length of the fourth lens L 4  of the third optical assembly C 3 ; f56 is a focal length of the fourth optical assembly C 4 ; f5 is a focal length of the fifth lens L 5  of the fourth optical assembly C 4 ; f6 is a focal length of the sixth lens L 6  of the fourth optical assembly C 4 ; f7 is a focal length of the seventh lens L 7  of the fifth optical assembly C 5 . 
     Parameters of the optical imaging lens  100  of the first embodiment of the present invention are listed in following Table 1, including the focal length F of the optical imaging lens  100  (also called an effective focal length (EFL)), a F-number (Fno), a maximal field of view (HFOV), a radius of curvature (R) of each lens, a distance (D) between each surface and the next surface on the optical axis Z, a refractive index (Nd) of each lens, the focal length of each lens, the focal length (cemented focal length) of the second optical assembly C 2 , and the focal length (cemented focal length) of the fourth optical assembly C 4 , wherein a unit of the focal length, the radius of curvature, and the distance is millimeter (mm). 
     
       
         
          TABLE 1
           
               
               
               
               
               
               
               
             
               
                 F=5.91 mm; Fno=1.74; HFOV=97 deg 
               
               
                 Surface 
                 R(mm) 
                 D(mm) 
                 Nd 
                 Focal length 
                 Cemented focal length 
                 Note 
               
             
            
               
                 S 1 
 
                 17.43 
                 1.4 
                 1.52 
                 -11.48 
                 0 
                 L 1 
 
               
               
                 S 2 
 
                 3.39 
                 7.04 
                 1 
                 0 
                 0 
                   
               
               
                 S 3 
 
                 -7.87 
                 1.86 
                 1.88 
                 -15.02 
                 38.12 
                 L 2 
 
               
               
                 S 4 , S 5 
 
                 15.73 
                 5.3 
                 1.7 
                 19.83 
                 0 
                 L 3 
 
               
               
                 S 6 
 
                 -10.72 
                 0.1 
                 1 
                 0 
                 0 
                   
               
               
                 S 7 
 
                 21.49 
                 3 
                 1.88 
                 17.31 
                 0 
                 L 4 
 
               
               
                 S 8 
 
                 -57.07 
                 5.81 
                 1 
                 0 
                 0 
                   
               
               
                 ST 
                 Infinity 
                 0.01 
                 1 
                 0 
                 0 
                 ST 
               
               
                 S 9 
 
                 11.33 
                 2.94 
                 1.99 
                 -64.75 
                 64.3 
                 L 5 
 
               
               
                 S 10 , S 11 
 
                 4.92 
                 3.11 
                 1.44 
                 21 
                 0 
                 L 6 
 
               
               
                 S 12 
 
                 -3337.22 
                 4.08 
                 1 
                 0 
                 0 
                   
               
               
                 S 13 
 
                 15.64 
                 3.15 
                 1.5 
                 16.8 
                 0 
                 L 7 
 
               
               
                 S 14 
 
                 -14.85 
                 0.64 
                 1 
                 0 
                 0 
                   
               
               
                 S 15 
 
                 Infinity 
                 0.3 
                 1.52 
                 0 
                 0 
                 Infrared filter L 8 
 
               
               
                 S 16 
 
                 Infinity 
                 5.21 
                 1 
                 0 
                 0 
                   
               
               
                 S 17 
 
                 Infinity 
                 0.5 
                 1.52 
                 0 
                 0 
                 Protective glass L 9 
 
               
               
                 S 18 
 
                 Infinity 
                 0.16 
                 1 
                 0 
                 0 
                   
               
               
                 Im 
                 Infinity 
                   
                   
                   
                   
                   
               
            
           
         
       
     
     It can be seen from Table 1 that, in the current embodiment, the focal length F of the optical imaging lens  100  is 5.91 mm, and the Fno is 1.74, and the HFOV is 97 degrees, wherein f1=-11.48 mm; f2=-15.02 mm; f3=19.83 mm; f4=17.31 mm; f5=-64.75 mm; f6=21 mm; f7=16.8 mm; f23=38.12 mm; f56=64.3 mm. 
     Additionally, based on the above detailed parameters, detailed values of the aforementioned conditional formula in the first embodiment are as follows: f1/F=-0.51; f23/F=0.16; f2/F=-0.39; f3/F=0.3; f4/F=0.34; f56/F=0.09; f5/F=-0.09; f6/F=0.28; f7/F=0.35. 
     With the aforementioned design, the first optical assembly C 1  to the fifth optical assembly C 5  satisfy the aforementioned conditions (1) to (5) of the optical imaging lens  100 . 
     Moreover, an aspheric surface contour shape Z of each of the object-side surface S 1  of the first lens L 1 , and the image-side surface S 2  of the first lens L 1 , and the object-side surface S 13  of the seventh lens L 7 , and the image-side surface S 14  of the seventh lens L 7  of the optical imaging lens  100  according to the first embodiment could be obtained by following formula: 
     
       
         
           
             
               
                 Z= 
                 
                   
                     c 
                     
                       h 
                       2 
                     
                   
                   
                     1 
                     + 
                     
                       
                         1 
                         − 
                         
                           
                             1 
                             + 
                             k 
                           
                         
                         
                           c 
                           2 
                         
                         
                           h 
                           2 
                         
                       
                     
                   
                 
                 + 
                 
                   A 
                   2 
                 
                 
                   h 
                   2 
                 
                 + 
                 
                   A 
                   4 
                 
                 
                   h 
                   4 
                 
                 + 
                 
                   A 
                   6 
                 
                 
                   h 
                   6 
                 
                 + 
                 
                   A 
                   8 
                 
                 
                   h 
                   8 
                 
                 + 
                 
                   A 
                   
                     10 
                   
                 
                 
                   h 
                   
                     10 
                   
                 
               
             
             
               
                 + 
                 
                   A 
                   
                     12 
                   
                 
                 
                   h 
                   
                     12 
                   
                 
                 + 
                 
                   A 
                   
                     14 
                   
                 
                 
                   h 
                   
                     14 
                   
                 
                 + 
                 
                   A 
                   
                     16 
                   
                 
                 
                   h 
                   
                     16 
                   
                 
               
             
           
         
       
     
      wherein Z is aspheric surface contour shape; c is reciprocal of radius of curvature; h is half the off-axis height of the surface; k is conic constant; A 2 , A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , and A 16  respectively represents different order coefficient of h. 
     The conic constant k of each of the object-side surface S 1  of the first lens L 1 , and the image-side surface S 2  of the first lens L 1 , and the object-side surface S 13  of the seventh lens L 7 , and the image-side surface S 14  of the seventh lens L 7  of the optical imaging lens  100  according to the first embodiment and the different order coefficient of A 2 , A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , and A 16  are listed in following Table 2: 
     
       
         
          TABLE 2
           
               
               
               
               
               
             
               
                 Surface 
                 S 1 
 
                 S 2 
 
                 S 13 
 
                 S 14 
 
               
             
            
               
                 k 
                 -7.84E-01 
                 -1.07E+00 
                 4.45E+00 
                 -2.55E-01 
               
               
                 A 2 
 
                 0 
                 0 
                 0 
                 0 
               
               
                 A 4 
 
                 -3.34E-04 
                 4.02E-04 
                 -2.97E-04 
                 1.93E-04 
               
               
                 A 6 
 
                 2.26E-06 
                 2.15E-06 
                 -4.96E-06 
                 -1.52E-05 
               
               
                 A 8 
 
                 -8.44E-09 
                 -3.15E-07 
                 3.52E-07 
                 8.30E-07 
               
               
                 A 10 
 
                 -3.61E-11 
                 1.49E-08 
                 -2.55E-08 
                 -4.22E-08 
               
               
                 A 12 
 
                 4.72E-13 
                 -3.30E-10 
                 7.86E-10 
                 1.07E-09 
               
               
                 A 14 
 
                 0.00E+00 
                 1.77E-12 
                 -8.53E-12 
                 -9.94E-12 
               
               
                 A 16 
 
                 0 
                 0 
                 0 
                 0 
               
            
           
         
       
     
     Taking optical simulation data to verify the imaging quality of the optical imaging lens  100 , wherein  FIG.  1 B  is a diagram showing the astigmatic field curves according to the first embodiment;  FIG.  1 C  is a diagram showing the distortion according to the first embodiment;  FIG.  1 D  is a diagram showing the modulus of the OTF according to the first embodiment. In  FIG.  1 B , a curve S is data of a sagittal direction, and a curve T is data of a tangential direction. The graphics shown in  FIG.  1 C  and  FIG.  1 D  are within a standard range. In this way, the optical imaging lens  100  of the first embodiment could effectively enhance image quality and lower a distortion thereof. 
     An optical imaging lens  200  according to a second embodiment of the present invention is illustrated in  FIG.  2 A , which includes, in order along an optical axis Z from an object side to an image side, a first optical assembly C 1 , a second optical assembly C 2 , a third optical assembly C 3 , an aperture ST, a fourth optical assembly C 4 , and a fifth optical assembly C 5 . In the current embodiment, the second optical assembly C 2  and the fourth optical assembly C 4  are respectively a compound lens, while the first optical assembly C 1 , the third optical assembly C 3 , and the fifth optical assembly C 5  are respectively a single lens. 
     The first optical assembly C 1  has negative refractive power. In the current embodiment, the first optical assembly C 1  is a single lens that includes a first lens L 1 , wherein the first lens L 1  is a negative meniscus; an object-side surface S 1  of the first lens L 1  is a convex surface that is slightly convex toward the object side, and an image-side surface S 2  of the first lens L 1  is a concave surface toward the image side; the object-side surface S 1 , the image-side surface S 2 , or both of the object-side surface S 1  and the image-side surface S 2  of the first lens L 1  are aspheric surfaces. As shown in  FIG.  2 A , both of the object-side surface S 1  and the image-side surface S 2  of the first lens L 1  are aspheric surfaces, and a part of a surface of the first lens L 1  toward the image side is recessed to form the image-side surface S 2 , and the optical axis Z passes through the object-side surface S 1  and the image-side surface S 2  of the first lens L 1 . 
     The second optical assembly C 2  has positive refractive power. In the current embodiment, the second optical assembly C 2  is a compound lens formed by adhering a second lens L 2  and a third lens L 3 , wherein the second lens L 2  is a biconcave lens with negative refractive power (i.e., both of an object-side surface S 3  of the second lens L 2  and an image-side surface S 4  of the second lens L 2  are concave surfaces). As shown in  FIG.  2 A , a part of a surface of the second lens L 2  toward the object side is recessed to form the object-side surface S 3 , and a surface of the second lens L 2  toward the image side is recessed to form the image-side surface S 4 , and the optical axis Z passes through the obj ect-side surface S 3  and the image-side surface S 4  of the second lens L 2 . 
     The third lens L 3  is a biconvex lens (i.e., both of an object-side surface S 5  of the third lens L 3  and an image-side surface S 6  of the third lens L 3  are convex surfaces) with positive refractive power. In the current embodiment, a part of a surface of the third lens L 3  toward the object side is convex to form the object-side surface S 5 , and a surface of the third lens L 3  toward the image side is convex to form the image-side surface S 6 , and the optical axis Z passes through the object-side surface S 5  and the image-side surface S 6  of the third lens L 3 , wherein the object-side surface S 5  of the third lens L 3  and the image-side surface S 4  of the second lens L 2  are adhered to form a same surface. 
     The third optical assembly C 3  has positive refractive power. In the current embodiment, the third optical assembly C 3  is a single lens that includes a fourth lens L 4 , wherein the fourth lens L 4  is a biconvex lens (i.e., both of an object-side surface S 7  of the fourth lens L 4  and an image-side surface S 8  of the fourth lens L 4  are convex surfaces). As shown in  FIG.  2 A , the object-side surface S 7  of the fourth lens L 4  is convex toward the object side in an arc shape, and the image-side surface S 8  of the fourth lens L 4  is slightly convex toward the image side. 
     The fourth optical assembly C 4  has positive refractive power. In the current embodiment, the fourth optical assembly C 4  is a compound lens formed by adhering a fifth lens L 5  and a sixth lens L 6 , wherein the fifth lens L 5  is a negative meniscus; an object-side surface S 9  of the fifth lens L 5  is a convex surface toward the object side, and an image-side surface S 10  of the fifth lens L 5  is a concave surface toward the image side. As shown in  FIG.  2 A , a part of a surface of the fifth lens L 5  toward the image side is recessed to form the image-side surface S 10 , and the optical axis Z passes through the object-side surface S 9  and the image-side surface S 10  of the fifth lens L 5 . 
     The sixth lens L 6  is a positive meniscus, wherein a surface of the sixth lens L 6  toward the object side is convex to form an object-side surface S 11 , and a surface of the sixth lens L 6  toward the image side is slightly recessed to form an image-side surface S 12 . The object-side surface S 11  of the sixth lens L 6  and the image-side surface S 10  of the fifth lens L 5  are adhered to form a same surface. 
     The fifth optical assembly C 5  has positive refractive power. In the current embodiment, the fifth optical assembly C 5  is a single lens that includes a seventh lens L 7 , wherein the seventh lens L 7  is a biconvex lens (i.e., both of an object-side surface S 13  of the seventh lens L 7  and an image-side surface S 14  of the seventh lens L 7  are convex surfaces) with positive refractive power; the object-side surface S 13 , the image-side surface S 14 , or both of the object-side surface S 13  and the image-side surface S 14  of the seventh lens L 7  are aspheric surfaces. As shown in  FIG.  2 A , both of the object-side surface S 13  and the image-side surface S 14  of the seventh lens L 7  are aspheric surfaces, and a surface of the seventh lens L 7  toward the object side is slightly convex to form the object-side surface S 13 , and a surface of the seventh lens L 7  toward the image side is convex to form the image-side surface S 14 . 
     Additionally, the optical imaging lens  200  further includes an infrared filter L 8  and a protective glass L 9 , wherein the infrared filter L 8  is disposed between the seventh lens L 7  and the protective glass L 9  and is closer to the image-side surface S 14  of the seventh lens L 7  than the protective glass L 9 , thereby filtering out excess infrared rays in an image light passing through the optical imaging lens  100  to improve imaging quality. The protective glass L 9  for protecting the infrared filter L 8  is disposed between the infrared filter L 8  and an image plane Im of the optical imaging lens  200  and is closer to the image plane Im than the infrared filter L 8 . 
     In order to keep the optical imaging lens  200  in good optical performance and high imaging quality, the optical imaging lens  200  further satisfies: 
     
       
         
           
             -0 
             .48&gt;f1/F&gt;-0 
             .53; 
           
         
       
     
     
       
         
           
             0 
             .18&gt;f23/F&gt;0 
             .13; -0 
             .35&gt;f2/F&gt;-0 
             .42; 0 
             .35&gt;f3/F&gt;0 
             .25; 
           
         
       
     
     
       
         
           
             0 
             .35&gt;f4/F&gt;0 
             .3; 
           
         
       
     
     
       
         
           
             0 
             .15&gt;f56/F&gt;0 
             .05; -0 
             .05&gt;f5/F&gt;-0 
             .15; 0 
             .3&gt;f6/F&gt;0 
             .2; 
           
         
       
     
     
       
         
           
             0 
             .37&gt;f7/F&gt;0 
             .3; 
           
         
       
     
     wherein F is a focal length of the optical imaging lens  200 ;  f   1  is a focal length of the first lens L 1  of the first optical assembly C 1 ;  f   23  is a focal length of the second optical assembly C 2 ;  f   2  is a focal length of the second lens L 2  of the second optical assembly C 2 ;  f   3  is a focal length of the third lens L 3  of the second optical assembly C 2 ;  f   4  is a focal length of the fourth lens L 4  of the third optical assembly C 3 ;  f   56  is a focal length of the fourth optical assembly C 4 ;  f   5  is a focal length of the fifth lens L 5  of the fourth optical assembly C 4 ;  f   6  is a focal length of the sixth lens L 6  of the fourth optical assembly C 4 ;  f   7  is a focal length of the seventh lens L 7  of the fifth optical assembly C 5 . 
     Parameters of the optical imaging lens  200  of the second embodiment of the present invention are listed in following Table 3, including the focal length F of the optical imaging lens  200  (also called an effective focal length (EFL)), a F-number (Fno), a maximal field of view (HFOV), a radius of curvature (R) of each lens, a distance (D) between each surface and the next surface on the optical axis Z, a refractive index (Nd) of each lens, the focal length of each lens, the focal length (cemented focal length) of the second optical assembly C 2 , and the focal length (cemented focal length) of the fourth optical assembly C 4 , wherein a unit of the focal length, the radius of curvature, and the distance is millimeter (mm). 
     
       
         
          TABLE 3
           
               
               
               
               
               
               
               
             
               
                 F=5.68 mm; Fno=1.75; HFOV=100 deg 
               
               
                 Surface 
                 R(mm) 
                 D(mm) 
                 Nd 
                 Focal length 
                 Cemented focal length 
                 Note 
               
             
            
               
                 S 1 
 
                 22.25 
                 1.4 
                 1.52 
                 -11.36 
                 0 
                 L 1 
 
               
               
                 S 2 
 
                 4.56 
                 6.92 
                 1 
                 0 
                 0 
                   
               
               
                 S 3 
 
                 -8.07 
                 3.09 
                 1.88 
                 -15.22 
                 38.79 
                 L 2 
 
               
               
                 S 4 , S 5 
 
                 14.69 
                 4.81 
                 1.7 
                 20.64 
                 0 
                 L 3 
 
               
               
                 S 6 
 
                 -11.06 
                 0.1 
                 1 
                 0 
                 0 
                   
               
               
                 S 7 
 
                 18.59 
                 3.19 
                 1.89 
                 17.22 
                 0 
                 L 4 
 
               
               
                 S 8 
 
                 -86.96 
                 5.62 
                 1 
                 0 
                 0 
                   
               
               
                 ST 
                 Infinity 
                 0.01 
                 1 
                 0 
                 0 
                 ST 
               
               
                 S 9 
 
                 10.27 
                 2.2 
                 1.96 
                 -43.37 
                 47.87 
                 L 5 
 
               
               
                 S 10 , S 11 
 
                 5.93 
                 3.12 
                 1.5 
                 23.6 
                 0 
                 L 6 
 
               
               
                 S 12 
 
                 193.86 
                 4.75 
                 1 
                 0 
                 0 
                   
               
               
                 S 13 
 
                 19.16 
                 3.42 
                 1.5 
                 17.88 
                 0 
                 L 7 
 
               
               
                 S 14 
 
                 -16.71 
                 0.64 
                 1 
                 0 
                 0 
                   
               
               
                 S 15 
 
                 Infinity 
                 0.3 
                 1.52 
                 0 
                 0 
                 Infrared filter L 8 
 
               
               
                 S 16 
 
                 Infinity 
                 4.36 
                 1 
                 0 
                 0 
                   
               
               
                 S 17 
 
                 Infinity 
                 0.5 
                 1.52 
                 0 
                 0 
                 Protective glass L 9 
 
               
               
                 S 18 
 
                 Infinity 
                 0.16 
                 1 
                 0 
                 0 
                   
               
               
                 Im 
                 Infinity 
                   
                   
                   
                   
                 Im 
               
            
           
         
       
     
     It can be seen from Table 3 that, in the second embodiment, the focal length (F) of the optical imaging lens  200  is 5.68 mm, and the Fno is 1.75, and the HFOV is 100 degrees, wherein f1=-11.36 mm; f2=-15.22 mm; f3=20.64 mm; f4=17.22 mm; f5=-43.37 mm; f6=23.6 mm; f7=17.88 mm; f23=38.79 mm; f56=47.87 mm. 
     Additionally, based on the above detailed parameters, detailed values of the aforementioned conditional formula in the second embodiment are as follows:  f   1 /F=-0.5;  f   23 /F=0.15;  f   2 /F=-0.37;  f   3 /F=0.28;  f   4 /F=0.33;  f   56 /F=0.12;  f   5 /F=-0.13;  f   6 /F=0.24;  f   7 /F=0.32. 
     With the aforementioned design, the first optical assembly C 1  to the fifth optical assembly C 5  satisfy the aforementioned conditions (1) to (5) of the optical imaging lens  200 . 
     Moreover, an aspheric surface contour shape Z of each of the object-side surface S 1  of the first lens L 1 , and the image-side surface S 2  of the first lens L 1 , and the object-side surface S 13  of the seventh lens L 7 , and the image-side surface S 14  of the seventh lens L 7  of the optical imaging lens  200  according to the second embodiment could be obtained by following formula: 
     
       
         
           
             
               
                 Z= 
                 
                   
                     c 
                     
                       h 
                       2 
                     
                   
                   
                     1 
                     + 
                     
                       
                         1 
                         − 
                         
                           
                             1 
                             + 
                             k 
                           
                         
                         
                           c 
                           2 
                         
                         
                           h 
                           2 
                         
                       
                     
                   
                 
                 + 
                 
                   A 
                   2 
                 
                 
                   h 
                   2 
                 
                 + 
                 
                   A 
                   4 
                 
                 
                   h 
                   4 
                 
                 + 
                 
                   A 
                   6 
                 
                 
                   h 
                   6 
                 
                 + 
                 
                   A 
                   8 
                 
                 
                   h 
                   8 
                 
                 + 
                 
                   A 
                   
                     10 
                   
                 
                 
                   h 
                   
                     10 
                   
                 
               
             
             
               
                 + 
                 
                   A 
                   
                     12 
                   
                 
                 
                   h 
                   
                     12 
                   
                 
                 + 
                 
                   A 
                   
                     14 
                   
                 
                 
                   h 
                   
                     14 
                   
                 
                 + 
                 
                   A 
                   
                     16 
                   
                 
                 
                   h 
                   
                     16 
                   
                 
               
             
           
         
       
     
      wherein Z is aspheric surface contour shape; c is reciprocal of radius of curvature; h is half the off-axis height of the surface; k is conic constant; A 2 , A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , and A 16  respectively represents different order coefficient of h. 
     The conic constant k of each of the object-side surface S 1  of the first lens L 1 , and the image-side surface S 2  of the first lens L 1 , and the object-side surface S 13  of the seventh lens L 7 , and the image-side surface S 14  of the seventh lens L 7  of the optical imaging lens  200  according to the second embodiment and the different order coefficient of A 2 , A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , and A 16  are listed in following Table 4: 
     
       
         
          TABLE 4
           
               
               
               
               
               
             
               
                 Surface 
                 S 1 
 
                 S 2 
 
                 S 13 
 
                 S 14 
 
               
             
            
               
                 k 
                 3.80E-01 
                 -1.02E+00 
                 2.76E+00 
                 2.59E-01 
               
               
                 A 2 
 
                 0 
                 0 
                 0 
                 0 
               
               
                 A 4 
 
                 -1.25E-04 
                 5.63E-04 
                 -4.76E-04 
                 3.87E-05 
               
               
                 A 6 
 
                 -2.98E-06 
                 2.42E-06 
                 7.28E-06 
                 -3.44E-06 
               
               
                 A 8 
 
                 6.27E-08 
                 -4.01E-07 
                 -8.59E-07 
                 -2.83E-07 
               
               
                 A 10 
 
                 -5.64E-10 
                 8.40E-09 
                 4.27E-08 
                 1.26E-08 
               
               
                 A 12 
 
                 2.08E-12 
                 2.12E-11 
                 -1.20E-09 
                 -3.36E-10 
               
               
                 A 14 
 
                 0.00E+00 
                 -3.05E-12 
                 1.52E-11 
                 4.40E-12 
               
               
                 A 16 
 
                 0 
                 0 
                 0 
                 0 
               
            
           
         
       
     
     Taking optical simulation data to verify the imaging quality of the optical imaging lens  200 , wherein  FIG.  2 B  is a diagram showing the astigmatic field curves according to the second embodiment;  FIG.  2 C  is a diagram showing the distortion according to the second embodiment;  FIG.  2 D  is a diagram showing the modulus of the OTF according to the second embodiment. In  FIG.  2 B , a curve S is data of a sagittal direction, and a curve T is data of a tangential direction. The graphics shown in  FIG.  2 C  and  FIG.  2 D  are within a standard range. In this way, the optical imaging lens  200  of the second embodiment could effectively enhance image quality and lower a distortion thereof. 
     An optical imaging lens  300  according to a third embodiment of the present invention is illustrated in  FIG.  3 A , which includes, in order along an optical axis Z from an object side to an image side, a first optical assembly C 1 , a second optical assembly C 2 , a third optical assembly C 3 , an aperture ST, a fourth optical assembly C 4 , and a fifth optical assembly C 5 . In the current embodiment, the second optical assembly C 2  and the fourth optical assembly C 4  are respectively a compound lens, while the first optical assembly C 1 , the third optical assembly C 3 , and the fifth optical assembly C 5  are respectively a single lens. 
     The first optical assembly C 1  has negative refractive power. In the current embodiment, the first optical assembly C 1  is a single lens that includes a first lens L 1 , wherein the first lens L 1  is a negative meniscus; an object-side surface S 1  of the first lens L 1  is a convex surface that is slightly convex toward the object side, and an image-side surface S 2  of the first lens L 1  is a concave surface toward the image side; the object-side surface S 1 , the image-side surface S 2 , or both of the object-side surface S 1  and the image-side surface S 2  of the first lens L 1  are aspheric surfaces. As shown in  FIG.  3 A , both of the object-side surface S 1  and the image-side surface S 2  of the first lens L 1  are aspheric surfaces, and a part of a surface of the first lens L 1  toward the image side is recessed to form the image-side surface S 2 , and the optical axis Z passes through the object-side surface S 1  and the image-side surface S 2  of the first lens L 1 . 
     The second optical assembly C 2  has positive refractive power. In the current embodiment, the second optical assembly C 2  is a compound lens formed by adhering a second lens L 2  and a third lens L 3 , wherein the second lens L 2  is a biconcave lens with negative refractive power (i.e., both of an object-side surface S 3  of the second lens L 2  and an image-side surface S 4  of the second lens L 2  are concave surfaces). As shown in  FIG.  3 A , a part of a surface of the second lens L 2  toward the object side is recessed to form the object-side surface S 3 , and a surface of the second lens L 2  toward the image side is recessed to form the image-side surface S 4 , and the optical axis Z passes through the obj ect-side surface S 3  and the image-side surface S 4  of the second lens L 2 . 
     The third lens L 3  is a biconvex lens (i.e., both of an object-side surface S 5  of the third lens L 3  and an image-side surface S 6  of the third lens L 3  are convex surfaces) with positive refractive power. In the current embodiment, a part of a surface of the third lens L 3  toward the object side is convex to form the object-side surface S 5 , and a surface of the third lens L 3  toward the image side is convex to form the image-side surface S 6 , and the optical axis Z passes through the object-side surface S 5  and the image-side surface S 6  of the third lens L 3 , wherein the object-side surface S 5  of the third lens L 3  and the image-side surface S 4  of the second lens L 2  are adhered to form a same surface. 
     The third optical assembly C 3  has positive refractive power. In the current embodiment, the third optical assembly C 3  is a single lens that includes a fourth lens L 4 , wherein the fourth lens L 4  is a plano-convex lens; an object-side surface S 7  of the fourth lens L 4  is a convex surface toward the object side, and an image-side surface S 8  of the fourth lens L 4  is a flat surface. 
     The fourth optical assembly C 4  has positive refractive power. In the current embodiment, the fourth optical assembly C 4  is a compound lens formed by adhering a fifth lens L 5  and a sixth lens L 6 , wherein the fifth lens L 5  is a biconvex lens (i.e., both of an object-side surface S 9  of the fifth lens L 5  and an image-side surface S 10  of the fifth lens L 5  are convex surfaces) with negative refractive power. 
     The sixth lens L 6  is a biconcave lens with positive refractive power (i.e., both of an object-side surface S 11  of the sixth lens L 6  and an image-side surface S 12  of the sixth lens L 6  are concave surfaces). In the current embodiment, a surface of the sixth lens L 6  toward the object side is recessed to form the object-side surface S 11 , and a surface of the sixth lens L 6  toward the image side is slightly recessed to form the image-side surface S 12 , wherein the object-side surface S 11  of the sixth lens L 6  and the image-side surface S 10  of the fifth lens L 5  are adhered to form a same surface. 
     The fifth optical assembly C 5  has positive refractive power. In the current embodiment, the fifth optical assembly C 5  is a single lens that includes a seventh lens L 7 , wherein the seventh lens L 7  is a biconvex lens (i.e., both of an object-side surface S 13  of the seventh lens L 7  and an image-side surface S 14  of the seventh lens L 7  are convex surfaces) with positive refractive power; the object-side surface S 13 , the image-side surface S 14 , or both of the object-side surface S 13  and the image-side surface S 14  of the seventh lens L 7  are aspheric surfaces. As shown in  FIG.  3 A , both of the object-side surface S 13  and the image-side surface S 14  of the seventh lens L 7  are aspheric surfaces, and a surface of the seventh lens L 7  toward the object side is slightly convex to form the object-side surface S 13 , and a surface of the seventh lens L 7  toward the image side is convex to form the image-side surface S 14 . 
     Additionally, the optical imaging lens  300  further includes an infrared filter L 8  and a protective glass L 9 , wherein the infrared filter L 8  is disposed between the seventh lens L 7  and the protective glass L 9  and is closer to the image-side surface S 14  of the seventh lens L 7  than the protective glass L9. The protective glass L 9  for protecting the infrared filter L 8  is disposed between the infrared filter L 8  and an image plane Im of the optical imaging lens  300  and is closer to the image plane Im than the infrared filter L 8 . 
     In order to keep the optical imaging lens  300  in good optical performance and high imaging quality, the optical imaging lens  300  further satisfies: 
     
       
         
           
             -0 
             .48&gt;f1/F&gt;-0 
             .53; 
           
         
       
     
     
       
         
           
             0 
             .18&gt;f23/F&gt;0 
             .13; -0 
             .35&gt;f2/F&gt;-0 
             .42; 0 
             .35&gt;f3/F&gt;0 
             .25; 
           
         
       
     
     
       
         
           
             0 
             .35&gt;f4/F&gt;0 
             .3; 
           
         
       
     
     
       
         
           
             0 
             .15&gt;f56/F&gt;0 
             .05; -0 
             .05&gt;f5/F&gt;-0 
             .15; 0 
             .3&gt;f6/F&gt;0 
             .2; 
           
         
       
     
     
       
         
           
             0 
             .37&gt;f7/F&gt;0 
             .3; 
           
         
       
     
     wherein F is a focal length of the optical imaging lens  300 ;  f   1  is a focal length of the first lens L 1  of the first optical assembly C 1 ;  f   23  is a focal length of the second optical assembly C 2 ;  f   2  is a focal length of the second lens L 2  of the second optical assembly C 2 ;  f   3  is a focal length of the third lens L 3  of the second optical assembly C 2 ;  f   4  is a focal length of the fourth lens L 4  of the third optical assembly C 3 ;  f   56  is a focal length of the fourth optical assembly C 4 ;  f   5  is a focal length of the fifth lens L 5  of the fourth optical assembly C 4 ;  f   6  is a focal length of the sixth lens L 6  of the fourth optical assembly C 4 ;  f   7  is a focal length of the seventh lens L 7  of the fifth optical assembly C 5 . 
     Parameters of the optical imaging lens  300  of the third embodiment of the present invention are listed in following Table 5, including the focal length F of the optical imaging lens  300  (also called an effective focal length (EFL)), a F-number (Fno), a maximal field of view (HFOV), a radius of curvature (R) of each lens, a distance (D) between each surface and the next surface on the optical axis Z, a refractive index (Nd) of each lens, the focal length of each lens, the focal length (cemented focal length) of the second optical assembly C 2 , and the focal length (cemented focal length) of the fourth optical assembly C 4 , wherein a unit of the focal length, the radius of curvature, and the distance is millimeter (mm). 
     
       
         
          TABLE 5
           
               
               
               
               
               
               
               
             
               
                 F=5.68 mm; Fno=1.75; HFOV=100 deg 
               
               
                 Surface 
                 R(mm) 
                 D(mm) 
                 Nd 
                 Focal length 
                 Cemented focal length 
                 Note 
               
             
            
               
                 S 1 
 
                 12.74 
                 1.47 
                 1.69 
                 -11.36 
                 0 
                 L 1 
 
               
               
                 S 2 
 
                 3.96 
                 7.98 
                 1 
                 0 
                 0 
                   
               
               
                 S 3 
 
                 -14 
                 4.54 
                 1.91 
                 -15.22 
                 38.79 
                 L 2 
 
               
               
                 S 4 , S 5 
 
                 14.97 
                 4.64 
                 1.88 
                 20.64 
                 0 
                 L 3 
 
               
               
                 S 6 
 
                 -15.97 
                 0.1 
                 1 
                 0 
                 0 
                   
               
               
                 S 7 
 
                 12.09 
                 3.5 
                 1.7 
                 17.22 
                 0 
                 L 4 
 
               
               
                 S 8 
 
                 Infinity 
                 2.69 
                 1 
                 0 
                 0 
                   
               
               
                 ST 
                 Infinity 
                 4.07 
                 1 
                 0 
                 0 
                 ST 
               
               
                 S 9 
 
                 10.75 
                 5.08 
                 1.5 
                 -43.37 
                 47.87 
                 L 5 
 
               
               
                 S 10 , S 11 
 
                 -8.29 
                 0.8 
                 1.81 
                 23.6 
                 0 
                 L 6 
 
               
               
                 S 12 
 
                 46.81 
                 2.29 
                 1 
                 0 
                 0 
                   
               
               
                 S 13 
 
                 12 
                 3.66 
                 1.5 
                 17.88 
                 0 
                 L 7 
 
               
               
                 S 14 
 
                 -49 
                 0.64 
                 1 
                 0 
                 0 
                   
               
               
                 S 15 
 
                 Infinity 
                 0.3 
                 1.52 
                 0 
                 0 
                 Infrared filter L 8 
 
               
               
                 S 16 
 
                 Infinity 
                 2.2 
                 1 
                 0 
                 0 
                   
               
               
                 S 17 
 
                 Infinity 
                 0.5 
                 1.52 
                 0 
                 0 
                 Protective glass L 9 
 
               
               
                 S 18 
 
                 Infinity 
                 0.16 
                 1 
                 0 
                 0 
                   
               
               
                 Im 
                 Infinity 
                   
                   
                   
                   
                 Im 
               
            
           
         
       
     
     It can be seen from Table 5 that, in the current embodiment, the focal length F of the optical imaging lens  300  is 5.68 mm, and the Fno is 1.75, and the HFOV is 100 degrees, wherein f1=-11.36 mm; f2=-15.22 mm; f3=20.64 mm; f4=17.22 mm; f5=-43.37 mm; f6=23.6 mm; f7=17.88 mm; f23=38.79 mm; f56=47.87 mm. 
     Additionally, based on the above detailed parameters, detailed values of the aforementioned conditional formula in the third embodiment are as follows:  f   1 /F=-0.5;  f   23 /F=0.15;  f   2 /F=-0.37;  f   3 /F=0.28;  f   4 /F=0.33;  f   56 /F=0.12;  f   5 /F=-0.13;  f   6 /F=0.24;  f   7 /F=0.32. 
     With the aforementioned design, the first optical assembly C 1  to the fifth optical assembly C 5  satisfy the aforementioned conditions (1) to (5) of the optical imaging lens  300 . 
     Moreover, an aspheric surface contour shape Z of each of the object-side surface S 1  of the first lens L 1 , and the image-side surface S 2  of the first lens L 1 , and the object-side surface S 13  of the seventh lens L 7 , and the image-side surface S 14  of the seventh lens L 7  of the optical imaging lens  300  according to the third embodiment could be obtained by following formula: 
     
       
         
           
             
               
                 Z 
                   
                 = 
                   
                 
                   
                     c 
                     
                       h 
                       2 
                     
                   
                   
                     1 
                     + 
                     
                       
                         1 
                         − 
                         
                           
                             1 
                             + 
                             k 
                           
                         
                         
                           c 
                           2 
                         
                         
                           h 
                           2 
                         
                       
                     
                   
                 
                 + 
                 
                   A 
                   2 
                 
                 
                   h 
                   2 
                 
                 + 
                 
                   A 
                   4 
                 
                 
                   h 
                   4 
                 
                 + 
                 
                   A 
                   6 
                 
                 
                   h 
                   6 
                 
                 + 
                 
                   A 
                   8 
                 
                 
                   h 
                   8 
                 
                 + 
                 
                   A 
                   
                     10 
                   
                 
                 
                   h 
                   
                     10 
                   
                 
               
             
             
               
                 + 
                 
                   A 
                   
                     12 
                   
                 
                 
                   h 
                   
                     12 
                   
                 
                 + 
                 
                   A 
                   
                     14 
                   
                 
                 
                   h 
                   
                     14 
                   
                 
                 + 
                 
                   A 
                   
                     16 
                   
                 
                 
                   h 
                   
                     16 
                   
                 
               
             
           
         
       
     
      wherein Z is aspheric surface contour shape; c is reciprocal of radius of curvature; h is half the off-axis height of the surface; k is conic constant; A 2 , A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , and A 16  respectively represents different order coefficient of h. 
     The conic constant k of each of the object-side surface S 1  of the first lens L 1 , and the image-side surface S 2  of the first lens L 1 , and the object-side surface S 13  of the seventh lens L 7 , and the image-side surface S 14  of the seventh lens L 7  of the optical imaging lens  300  according to the third embodiment and the different order coefficient of A 2 , A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , and A 16  are listed in following Table 6: 
     
       
         
          TABLE 6
           
               
               
               
               
               
             
               
                 Surface 
                 S 1 
 
                 S 2 
 
                 S 13 
 
                 S 14 
 
               
             
            
               
                 k 
                 -7.94E-01 
                 -1.71E+00 
                 1.66E+00 
                 0.00E+00 
               
               
                 A 2 
 
                 0 
                 0 
                 0 
                 0 
               
               
                 A 4 
 
                 -6.84E-04 
                 1.36E-03 
                 -7.93E-04 
                 3.55E-04 
               
               
                 A 6 
 
                 5.82E-06 
                 -3.08E-05 
                 -1.84E-05 
                 -5.48E-05 
               
               
                 A 8 
 
                 -3.09E-08 
                 5.00E-07 
                 -2.74E-08 
                 1.21E-06 
               
               
                 A 10 
 
                 8.66E-11 
                 -2.09E-10 
                 -2.40E-09 
                 -1.45E-08 
               
               
                 A 12 
 
                 -1.17E-13 
                 -7.56E-11 
                 2.97E-10 
                 2.46E-10 
               
               
                 A 14 
 
                 -6.23E-16 
                 0.00E+00 
                 0 
                 0 
               
               
                 A 16 
 
                 0 
                 0 
                 0 
                 0 
               
            
           
         
       
     
     Taking optical simulation data to verify the imaging quality of the optical imaging lens  300 , wherein  FIG.  3 B  is a diagram showing the astigmatic field curves according to the third embodiment;  FIG.  3 C  is a diagram showing the distortion according to the third embodiment;  FIG.  3 D  is a diagram showing the modulus of the OTF according to the third embodiment. In  FIG.  3 B , a curve S is data of a sagittal direction, and a curve T is data of a tangential direction. The graphics shown in  FIG.  3 C  and  FIG.  3 D  are within a standard range. In this way, the optical imaging lens  300  of the third embodiment could effectively enhance image quality and lower a distortion thereof. 
     It must be pointed out that the embodiments described above are only some preferred embodiments of the present invention. It is noted that, the parameters listed in Tables are not a limitation of the present invention. All equivalent structures which employ the concepts disclosed in this specification and the appended claims should fall within the scope of the present invention.