Patent Publication Number: US-11391916-B2

Title: Optical imaging lens

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to an optical imaging lens. Specifically speaking, the present invention is directed to an optical imaging lens for use in a portable electronic device such as a mobile phone, a camera, a tablet personal computer, or a personal digital assistant (PDA) for taking pictures or for recording videos. 
     2. Description of the Prior Art 
     In recent years, the optical imaging lens has been continuously evolving, and its application range becomes wider. In addition to requiring the lens to be thin, light and short, the design of small f-number (Fno) is conducive to improving luminous flux. 
     Therefore, in addition to pursuing the thinness and smallness of the optical imaging lens, it is also an important direction of research and development to design an optical imaging lens with small f-number. 
     SUMMARY OF THE INVENTION 
     In light of the above, the present invention proposes an optical imaging lens of seven lens elements which is shorter in system length, technically possible, has ensured imaging quality, and has smaller f-number and enhanced image definition. The optical imaging lens of seven lens elements of the present invention from an object side to an image side in order along an optical axis has a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each first lens element, second lens element, third lens element, fourth lens element, fifth lens element, sixth lens element and seventh lens element respectively has an object-side surface which faces toward the object side to allow imaging rays to pass through as well as an image-side surface which faces toward the image side to allow the imaging rays to pass through. 
     In one embodiment of the present invention, a periphery region of the image-side surface of the first lens element is concave, a periphery region of the object-side surface of the third lens element is concave, a periphery region of the object-side surface of the fourth lens element is concave, the fifth lens element has negative refracting power, and a periphery region of the object-side surface of the fifth lens element is concave, an optical axis region of the image-side surface of the sixth lens element is concave, the lens elements having refracting power included by the optical imaging lens are only the seven lens elements described above, wherein the optical imaging lens satisfies the relationships: (G45+T5+G56+T6+G67+T7)/(T1+G12+T2)≥3.200, T1 is a thickness of the first lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, T5 is a thickness of the fifth lens element along the optical axis, T6 is a thickness of the sixth lens element along the optical axis, T7 is a thickness of the seventh lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, G67 is an air gap between the sixth lens element and the seventh lens element along the optical axis. 
     In another embodiment of the present invention, an optical axis region of the object-side surface of the first lens element is convex, a periphery region of the image-side surface of the second lens element is concave, a periphery region of the object-side surface of the third lens element is concave, a periphery region of the object-side surface of the fourth lens element is concave, the fifth lens element has negative refracting power, and a periphery region of the object-side surface of the fifth lens element is concave, an optical axis region of the image-side surface of the sixth lens element is concave, the lens elements having refracting power included by the optical imaging lens are only the seven lens elements described above, wherein the optical imaging lens satisfies the relationships: (G45+T5+G56+T6+G67+T7)/(T1+G12+T2)≥3.200, T1 is a thickness of the first lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, T5 is a thickness of the fifth lens element along the optical axis, T6 is a thickness of the sixth lens element along the optical axis, T7 is a thickness of the seventh lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, G67 is an air gap between the sixth lens element and the seventh lens element along the optical axis. 
     In the optical imaging lens of the present invention, the embodiments may also selectively satisfy the following optical conditions:
 
 TTL/AAG≤ 3.200;  1.
 
( EFL+BFL )/ AAG≤ 3.000;  2.
 
 TL /( T 2+ T 4+ T 7)≥4.200;  3.
 
 ALT /( T 2+ G 23+ T 3)≤3.200;  4.
 
( ALT+BFL )/( T 3+ G 34+ T 4)≥4.000;  5.
 
( EFL+AAG )/( G 45+ G 56+ G 67)≤5.100;  6.
 
 TTL /( G 12+ G 23+ G 45)≤7.000;  7.
 
( T 4+ T 5+ T 6)/( T 2+ T 3)≤3.000;  8.
 
( T 3+ G 34+ T 4)/ T 1≤2.500;  9.
 
( G 23+ G 67)/( T 2+ T 6)≥1.000;  10.
 
( T 6+ T 7)/( T 3+ T 4)≥1.000;  11.
 
 TL /( G 12+ G 23+ G 34)≥8.800;  12.
 
 TL /( G 45+ T 5+ G 56)≤6.000;  13.
 
( EFL+AAG )/( ALT+BFL )≥1.700;  14.
 
( G 23+ T 3+ G 34)/( T 4+ T 5)≥1.100;  15.
 
( G 45+ G 56+ G 67)/( G 12+ G 23+ G 34)≥2.580;  16.
 
( T 1+ T 2+ G 23)/( T 5+ G 56)≥1.700; and  17.
 
 TTL /( G 23+ G 45)≤6.100.  18.
 
     In the present invention, T1 is a thickness of the first lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, T3 is a thickness of the third lens element along the optical axis, T4 is a thickness of the fourth lens element along the optical axis, T5 is a thickness of the fifth lens element along the optical axis, T6 is a thickness of the sixth lens element along the optical axis, T7 is a thickness of the seventh lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G23 is an air gap between the second lens element and the third lens element along the optical axis, G34 is an air gap between the third lens element and the fourth lens element along the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element along the optical axis, G56 is an air gap between the fifth lens element and the sixth lens element along the optical axis, G67 is an air gap between the sixth lens element and the seventh lens element along the optical axis, ALT is a sum of thicknesses of seven lens elements along the optical axis, TL is a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element along the optical axis, TTL is the distance from the object-side surface of the first lens element to an image plane along the optical axis, BFL is a distance from the image-side surface of the seventh lens element to an image plane along the optical axis, AAG is a sum of six air gaps from the first lens element to the seventh lens element along the optical axis, EFL is an effective focal length of the optical imaging lens. 
     These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1-5  illustrates the methods for determining the surface shapes and for determining optical region or periphery region of one lens element. 
         FIG. 6  illustrates a first example of the optical imaging lens of the present invention. 
         FIG. 7A  illustrates the longitudinal spherical aberration on the image plane of the first example. 
         FIG. 7B  illustrates the field curvature aberration on the sagittal direction of the first example. 
         FIG. 7C  illustrates the field curvature aberration on the tangential direction of the first example. 
         FIG. 7D  illustrates the distortion of the first example. 
         FIG. 8  illustrates a second example of the optical imaging lens of the present invention. 
         FIG. 9A  illustrates the longitudinal spherical aberration on the image plane of the second example. 
         FIG. 9B  illustrates the field curvature aberration on the sagittal direction of the second example. 
         FIG. 9C  illustrates the field curvature aberration on the tangential direction of the second example. 
         FIG. 9D  illustrates the distortion of the second example. 
         FIG. 10  illustrates a third example of the optical imaging lens of the present invention. 
         FIG. 11A  illustrates the longitudinal spherical aberration on the image plane of the third example. 
         FIG. 11B  illustrates the field curvature aberration on the sagittal direction of the third example. 
         FIG. 11C  illustrates the field curvature aberration on the tangential direction of the third example. 
         FIG. 11D  illustrates the distortion of the third example. 
         FIG. 12  illustrates a fourth example of the optical imaging lens of the present invention. 
         FIG. 13A  illustrates the longitudinal spherical aberration on the image plane of the fourth example. 
         FIG. 13B  illustrates the field curvature aberration on the sagittal direction of the fourth example. 
         FIG. 13C  illustrates the field curvature aberration on the tangential direction of the fourth example. 
         FIG. 13D  illustrates the distortion of the fourth example. 
         FIG. 14  illustrates a fifth example of the optical imaging lens of the present invention. 
         FIG. 15A  illustrates the longitudinal spherical aberration on the image plane of the fifth example. 
         FIG. 15B  illustrates the field curvature aberration on the sagittal direction of the fifth example. 
         FIG. 15C  illustrates the field curvature aberration on the tangential direction of the fifth example. 
         FIG. 15D  illustrates the distortion of the fifth example. 
         FIG. 16  illustrates a sixth example of the optical imaging lens of the present invention. 
         FIG. 17A  illustrates the longitudinal spherical aberration on the image plane of the sixth example. 
         FIG. 17B  illustrates the field curvature aberration on the sagittal direction of the sixth example. 
         FIG. 17C  illustrates the field curvature aberration on the tangential direction of the sixth example. 
         FIG. 17D  illustrates the distortion of the sixth example. 
         FIG. 18  illustrates a seventh example of the optical imaging lens of the present invention. 
         FIG. 19A  illustrates the longitudinal spherical aberration on the image plane of the seventh example. 
         FIG. 19B  illustrates the field curvature aberration on the sagittal direction of the seventh example. 
         FIG. 19C  illustrates the field curvature aberration on the tangential direction of the seventh example. 
         FIG. 19D  illustrates the distortion of the seventh example. 
         FIG. 20  illustrates an eighth example of the optical imaging lens of the present invention. 
         FIG. 21A  illustrates the longitudinal spherical aberration on the image plane of the eighth example. 
         FIG. 21B  illustrates the field curvature aberration on the sagittal direction of the eighth example. 
         FIG. 21C  illustrates the field curvature aberration on the tangential direction of the eighth example. 
         FIG. 21D  illustrates the distortion of the eighth example. 
         FIG. 22  illustrates a ninth example of the optical imaging lens of the present invention. 
         FIG. 23A  illustrates the longitudinal spherical aberration on the image plane of the ninth example. 
         FIG. 23B  illustrates the field curvature aberration on the sagittal direction of the ninth example. 
         FIG. 23C  illustrates the field curvature aberration on the tangential direction of the ninth example. 
         FIG. 23D  illustrates the distortion of the ninth example. 
         FIG. 24  illustrates a tenth example of the optical imaging lens of the present invention. 
         FIG. 25A  illustrates the longitudinal spherical aberration on the image plane of the tenth example. 
         FIG. 25B  illustrates the field curvature aberration on the sagittal direction of the tenth example. 
         FIG. 25C  illustrates the field curvature aberration on the tangential direction of the tenth example. 
         FIG. 25D  illustrates the distortion of the tenth example. 
         FIG. 26  illustrates an eleventh example of the optical imaging lens of the present invention. 
         FIG. 27A  illustrates the longitudinal spherical aberration on the image plane of the eleventh example. 
         FIG. 27B  illustrates the field curvature aberration on the sagittal direction of the eleventh example. 
         FIG. 27C  illustrates the field curvature aberration on the tangential direction of the eleventh example. 
         FIG. 27D  illustrates the distortion of the eleventh example. 
         FIG. 28  shows the optical data of the first example of the optical imaging lens. 
         FIG. 29  shows the aspheric surface data of the first example. 
         FIG. 30  shows the optical data of the second example of the optical imaging lens. 
         FIG. 31  shows the aspheric surface data of the second example. 
         FIG. 32  shows the optical data of the third example of the optical imaging lens. 
         FIG. 33  shows the aspheric surface data of the third example. 
         FIG. 34  shows the optical data of the fourth example of the optical imaging lens. 
         FIG. 35  shows the aspheric surface data of the fourth example. 
         FIG. 36  shows the optical data of the fifth example of the optical imaging lens. 
         FIG. 37  shows the aspheric surface data of the fifth example. 
         FIG. 38  shows the optical data of the sixth example of the optical imaging lens. 
         FIG. 39  shows the aspheric surface data of the sixth example. 
         FIG. 40  shows the optical data of the seventh example of the optical imaging lens. 
         FIG. 41  shows the aspheric surface data of the seventh example. 
         FIG. 42  shows the optical data of the eighth example of the optical imaging lens. 
         FIG. 43  shows the aspheric surface data of the eighth example. 
         FIG. 44  shows the optical data of the ninth example of the optical imaging lens. 
         FIG. 45  shows the aspheric surface data of the ninth example. 
         FIG. 46  shows the optical data of the tenth example of the optical imaging lens. 
         FIG. 47  shows the aspheric surface data of the tenth example. 
         FIG. 48  shows the optical data of the eleventh example of the optical imaging lens. 
         FIG. 49  shows the aspheric surface data of the eleventh example. 
         FIG. 50  shows some important ratios in the examples. 
         FIG. 51  shows some important ratios in the examples. 
     
    
    
     DETAILED DESCRIPTION 
     The terms “optical axis region”, “periphery region”, “concave”, and “convex” used in this specification and claims should be interpreted based on the definition listed in the specification by the principle of lexicographer. 
     In the present disclosure, the optical system may comprise at least one lens element to receive imaging rays that are incident on the optical system over a set of angles ranging from parallel to an optical axis to a half field of view (HFOV) angle with respect to the optical axis. The imaging rays pass through the optical system to produce an image on an image plane. The term “a lens element having positive refracting power (or negative refracting power)” means that the paraxial refracting power of the lens element in Gaussian optics is positive (or negative). The term “an object-side (or image-side) surface of a lens element” refers to a specific region of that surface of the lens element at which imaging rays can pass through that specific region. Imaging rays include at least two types of rays: a chief ray Lc and a marginal ray Lm (as shown in  FIG. 1 ). An object-side (or image-side) surface of a lens element can be characterized as having several regions, including an optical axis region, a periphery region, and, in some cases, one or more intermediate regions, as discussed more fully below. 
       FIG. 1  is a radial cross-sectional view of a lens element  100 . Two referential points for the surfaces of the lens element  100  can be defined: a central point, and a transition point. The central point of a surface of a lens element is a point of intersection of that surface and the optical axis I. As illustrated in  FIG. 1 , a first central point CP 1  may be present on the object-side surface  110  of lens element  100  and a second central point CP 2  may be present on the image-side surface  120  of the lens element  100 . The transition point is a point on a surface of a lens element, at which the line tangent to that point is perpendicular to the optical axis I. The optical boundary OB of a surface of the lens element is defined as a point at which the radially outermost marginal ray Lm passing through the surface of the lens element intersects the surface of the lens element. All transition points lie between the optical axis I and the optical boundary OB of the surface of the lens element. If multiple transition points are present on a single surface, then these transition points are sequentially named along the radial direction of the surface with reference numerals starting from the first transition point. For example, the first transition point, e.g., TP 1 , (closest to the optical axis I), the second transition point, e.g., TP 2 , (as shown in  FIG. 4 ), and the Nth transition point (farthest from the optical axis I). 
     The region of a surface of the lens element from the central point to the first transition point TP 1  is defined as the optical axis region, which includes the central point. The region located radially outside of the farthest Nth transition point from the optical axis I to the optical boundary OB of the surface of the lens element is defined as the periphery region. In some embodiments, there may be intermediate regions present between the optical axis region and the periphery region, with the number of intermediate regions depending on the number of the transition points. 
     The shape of a region is convex if a collimated ray being parallel to the optical axis I and passing through the region is bent toward the optical axis I such that the ray intersects the optical axis I on the image side A 2  of the lens element. The shape of a region is concave if the extension line of a collimated ray being parallel to the optical axis I and passing through the region intersects the optical axis I on the object side A 1  of the lens element. 
     Additionally, referring to  FIG. 1 , the lens element  100  may also have a mounting portion  130  extending radially outward from the optical boundary OB. The mounting portion  130  is typically used to physically secure the lens element to a corresponding element of the optical system (not shown). Imaging rays do not reach the mounting portion  130 . The structure and shape of the mounting portion  130  are only examples to explain the technologies, and should not be taken as limiting the scope of the present disclosure. The mounting portion  130  of the lens elements discussed below may be partially or completely omitted in the following drawings. 
     Referring to  FIG. 2 , optical axis region Z 1  is defined between central point CP and first transition point TP 1 . Periphery region Z 2  is defined between TP 1  and the optical boundary OB of the surface of the lens element. Collimated ray  211  intersects the optical axis I on the image side A 2  of lens element  200  after passing through optical axis region Z 1 , i.e., the focal point of collimated ray  211  after passing through optical axis region Z 1  is on the image side A 2  of the lens element  200  at point R in  FIG. 2 . Accordingly, since the ray itself intersects the optical axis I on the image side A 2  of the lens element  200 , optical axis region Z 1  is convex. On the contrary, collimated ray  212  diverges after passing through periphery region Z 2 . The extension line EL of collimated ray  212  after passing through periphery region Z 2  intersects the optical axis I on the object side A 1  of lens element  200 , i.e., the focal point of collimated ray  212  after passing through periphery region Z 2  is on the object side A 1  at point M in  FIG. 2 . Accordingly, since the extension line EL of the ray intersects the optical axis I on the object side A 1  of the lens element  200 , periphery region Z 2  is concave. In the lens element  200  illustrated in  FIG. 2 , the first transition point TP 1  is the border of the optical axis region and the periphery region, i.e., TP 1  is the point at which the shape changes from convex to concave. 
     Alternatively, there is another way for a person having ordinary skill in the art to determine whether an optical axis region is convex or concave by referring to the sign of “Radius” (the “R” value), which is the paraxial radius of shape of a lens surface in the optical axis region. The R value is commonly used in conventional optical design software such as Zemax and CodeV. The R value usually appears in the lens data sheet in the software. For an object-side surface, a positive R value defines that the optical axis region of the object-side surface is convex, and a negative R value defines that the optical axis region of the object-side surface is concave. Conversely, for an image-side surface, a positive R value defines that the optical axis region of the image-side surface is concave, and a negative R value defines that the optical axis region of the image-side surface is convex. The result found by using this method should be consistent with the method utilizing intersection of the optical axis by rays/extension lines mentioned above, which determines surface shape by referring to whether the focal point of a collimated ray being parallel to the optical axis I is on the object-side or the image-side of a lens element. As used herein, the terms “a shape of a region is convex (concave),” “a region is convex (concave),” and “a convex- (concave-) region,” can be used alternatively. 
       FIG. 3 ,  FIG. 4  and  FIG. 5  illustrate examples of determining the shape of lens element regions and the boundaries of regions under various circumstances, including the optical axis region, the periphery region, and intermediate regions as set forth in the present specification. 
       FIG. 3  is a radial cross-sectional view of a lens element  300 . As illustrated in  FIG. 3 , only one transition point TP 1  appears within the optical boundary OB of the image-side surface  320  of the lens element  300 . Optical axis region Z 1  and periphery region Z 2  of the image-side surface  320  of lens element  300  are illustrated. The R value of the image-side surface  320  is positive (i.e., R≥0). Accordingly, the optical axis region Z 1  is concave. 
     In general, the shape of each region demarcated by the transition point will have an opposite shape to the shape of the adjacent region(s). Accordingly, the transition point will define a transition in shape, changing from concave to convex at the transition point or changing from convex to concave. In  FIG. 3 , since the shape of the optical axis region Z 1  is concave, the shape of the periphery region Z 2  will be convex as the shape changes at the transition point TP 1 . 
       FIG. 4  is a radial cross-sectional view of a lens element  400 . Referring to  FIG. 4 , a first transition point TP 1  and a second transition point TP 2  are present on the object-side surface  410  of lens element  400 . The optical axis region Z 1  of the object-side surface  410  is defined between the optical axis I and the first transition point TP 1 . The R value of the object-side surface  410  is positive (i.e., R≥0). Accordingly, the optical axis region Z 1  is convex. 
     The periphery region Z 2  of the object-side surface  410 , which is also convex, is defined between the second transition point TP 2  and the optical boundary OB of the object-side surface  410  of the lens element  400 . Further, intermediate region Z 3  of the object-side surface  410 , which is concave, is defined between the first transition point TP 1  and the second transition point TP 2 . Referring once again to  FIG. 4 , the object-side surface  410  includes an optical axis region Z 1  located between the optical axis I and the first transition point TP 1 , an intermediate region Z 3  located between the first transition point TP 1  and the second transition point TP 2 , and a periphery region Z 2  located between the second transition point TP 2  and the optical boundary OB of the object-side surface  410 . Since the shape of the optical axis region Z 1  is designed to be convex, the shape of the intermediate region Z 3  is concave as the shape of the intermediate region Z 3  changes at the first transition point TP 1 , and the shape of the periphery region Z 2  is convex as the shape of the periphery region Z 2  changes at the second transition point TP 2 . 
       FIG. 5  is a radial cross-sectional view of a lens element  500 . Lens element  500  has no transition point on the object-side surface  510  of the lens element  500 . For a surface of a lens element with no transition point, for example, the object-side surface  510  the lens element  500 , the optical axis region Z 1  is defined as the region between 0-50% of the distance between the optical axis I and the optical boundary OB of the surface of the lens element and the periphery region is defined as the region between 50%-100% of the distance between the optical axis I and the optical boundary OB of the surface of the lens element. Referring to lens element  500  illustrated in  FIG. 5 , the optical axis region Z 1  of the object-side surface  510  is defined between the optical axis I and 50% of the distance between the optical axis I and the optical boundary OB. The R value of the object-side surface  510  is positive (i.e., R≥0). Accordingly, the optical axis region Z 1  is convex. For the object-side surface  510  of the lens element  500 , because there is no transition point, the periphery region Z 2  of the object-side surface  510  is also convex. It should be noted that lens element  500  may have a mounting portion (not shown) extending radially outward from the periphery region Z 2 . 
     As shown in  FIG. 6 , the optical imaging lens  1  of seven lens elements of the present invention, sequentially located from an object side A 1  (where an object is located) to an image side A 2  along an optical axis I, has an aperture stop (ape. stop)  80 , a first lens element  10 , a second lens element  20 , a third lens element  30 , a fourth lens element  40 , a fifth lens element  50 , a sixth lens element  60 , a seventh lens element  70 , a filter  90  and an image plane  91 . Generally speaking, the first lens element  10 , the second lens element  20 , the third lens element  30 , the fourth lens element  40 , the fifth lens element  50 , the sixth lens element  60  and the seventh lens element  70  may be made of a transparent plastic material but the present invention is not limited to this, and each has an appropriate refracting power. In the present invention, lens elements having refracting power included by the optical imaging lens  1  are only the seven lens elements described above. The optical axis I is the optical axis of the entire optical imaging lens  1 , and the optical axis of each of the lens elements coincides with the optical axis of the optical imaging lens  1 . 
     Furthermore, the optical imaging lens  1  includes an aperture stop (ape. stop)  80  disposed in an appropriate position. In  FIG. 6 , the aperture stop  80  is disposed between the first lens element  10  and object side A 1 . When light emitted or reflected by an object (not shown) which is located at the object side A 1  enters the optical imaging lens  1  of the present invention, it forms a clear and sharp image on the image plane  91  at the image side A 2  after passing through the aperture stop  80 , the first lens element  10 , the second lens element  20 , the third lens element  30 , the fourth lens element  40 , the fifth lens element  50 , the sixth lens element  60 , the seventh lens element  70  and the filter  90 . In one embodiment of the present invention, the optional filter  90  may be a filter of various suitable functions, for example, the filter  90  may be an infrared cut filter (IR cut filter), placed between the seventh lens element  70  and the image plane  91 . 
     Each lens element in the optical imaging lens  1  of the present invention has an object-side surface facing toward the object side A 1  as well as an image-side surface facing toward the image side A 2 . For example, the first lens element  10  has an object-side surface  11  and an image-side surface  12 ; the second lens element  20  has an object-side surface  21  and an image-side surface  22 ; the third lens element  30  has an object-side surface  31  and an image-side surface  32 ; the fourth lens element  40  has an object-side surface  41  and an image-side surface  42 ; the fifth lens element  50  has an object-side surface  51  and an image-side surface  52 ; the sixth lens element  60  has an object-side surface  61  and an image-side surface  62 ; and the seventh lens element  70  has an object-side surface  71  and an image-side surface  72 . In addition, each object-side surface and image-side surface in the optical imaging lens  1  of the present invention has an optical axis region and a periphery region. 
     Each lens element in the optical imaging lens  1  of the present invention further has a thickness T along the optical axis I. For example, the first lens element  10  has a first lens element thickness T1, the second lens element  20  has a second lens element thickness T2, the third lens element  30  has a third lens element thickness T3, the fourth lens element  40  has a fourth lens element thickness T4, the fifth lens element  50  has a fifth lens element thickness T5, the sixth lens element  60  has a sixth lens element thickness T6, the seventh lens element  70  has a seventh lens element thickness T7. Therefore, the sum of thicknesses of seven lens elements in the optical imaging lens  1  along the optical axis I is ALT=T1+T2+T3+T4+T5+T6+T7. 
     In addition, between two adjacent lens elements in the optical imaging lens  1  of the present invention there may be an air gap along the optical axis I. For example, there is an air gap G12 disposed between the first lens element  10  and the second lens element  20 , an air gap G23 disposed between the second lens element  20  and the third lens element  30 , an air gap G34 disposed between the third lens element  30  and the fourth lens element  40 , an air gap G45 disposed between the fourth lens element  40  and the fifth lens element  50 , an air gap G56 disposed between the fifth lens element  50  and the sixth lens element  60  as well as an air gap G67 disposed between the sixth lens element  60  and the seventh lens element  70 . Therefore, the sum of six air gaps from the first lens element  10  to the seventh lens element  70  along the optical axis I is AAG=G12+G23+G34+G45+G56+G67. 
     In addition, a distance from the object-side surface  11  of the first lens element  10  to the image plane  91  along the optical axis I is TTL, namely a system length of the optical imaging lens  1 ; an effective focal length of the optical imaging lens is EFL; a distance from the object-side surface  11  of the first lens element  10  to the image-side surface  72  of the seventh lens element  70  along the optical axis I is TL; HFOV stands for the half field of view which is half of the field of view of the entire optical imaging lens element system; ImgH is the image height of the optical imaging lens  1 , and Fno is the f-number of the optical imaging lens  1 . 
     When the filter  90  is placed between the seventh lens element  70  and the image plane  91 , the air gap between the seventh lens element  70  and the filter  90  along the optical axis I is G7F; the thickness of the filter  90  along the optical axis I is TF; the air gap between the filter  90  and the image plane  91  along the optical axis I is GFP; and the distance from the image-side surface  72  of the seventh lens element  70  to the image plane  91  along the optical axis I is BFL. Therefore, BFL=G7F+TF+GFP. 
     Furthermore, the focal length of the first lens element  10  is f1; the focal length of the second lens element  20  is f2; the focal length of the third lens element  30  is f3; the focal length of the fourth lens element  40  is f4; the focal length of the fifth lens element  50  is f5; the focal length of the sixth lens element  60  is f6; the focal length of the seventh lens element  70  is f7; the refractive index of the first lens element  10  is n1; the refractive index of the second lens element  20  is n2; the refractive index of the third lens element  30  is n3; the refractive index of the fourth lens element  40  is n4; the refractive index of the fifth lens element  50  is n5; the refractive index of the sixth lens element  60  is n6; the refractive index of the seventh lens element  70  is n7; the Abbe number of the first lens element  10  is W; the Abbe number of the second lens element  20  is υ2; the Abbe number of the third lens element  30  is υ3; and the Abbe number of the fourth lens element  40  is υ4; the Abbe number of the fifth lens element  50  is υ5; the Abbe number of the sixth lens element  60  is υ6; and the Abbe number of the seventh lens element  70  is υ7. 
     First Example 
     Please refer to  FIG. 6  which illustrates the first example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 7A  for the longitudinal spherical aberration on the image plane  91  of the first example; please refer to  FIG. 7B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 7C  for the field curvature aberration on the tangential direction; and please refer to  FIG. 7D  for the distortion aberration. The Y axis of the spherical aberration in each example is “field of view” for 1.0. The Y axis of the astigmatic field and the distortion in each example stands for “image height” (ImgH), which is 4.500 mm. 
     The optical imaging lens  1  of the first example exclusively has seven lens elements  10 ,  20 ,  30 ,  40 ,  50 ,  60  and  70  with refracting power. The optical imaging lens  1  also has an aperture stop  80 . The aperture stop  80  is provided between the first lens element  10  and the object side A 1 . 
     The first lens element  10  has positive refracting power. An optical axis region  13  of the object-side surface  11  of the first lens element  10  is convex, and a periphery region  14  of the object-side surface  11  of the first lens element  10  is convex. An optical axis region  16  of the image-side surface  12  of the first lens element  10  is concave, and a periphery region  17  of the image-side surface  12  of the first lens element  10  is concave. Besides, both the object-side surface  11  and the image-side surface  12  of the first lens element  10  are aspherical surfaces, but it is not limited thereto. 
     The second lens element  20  has negative refracting power. An optical axis region  23  of the object-side surface  21  of the second lens element  20  is convex, and a periphery region  24  of the object-side surface  21  of the second lens element  20  is convex. An optical axis region  26  of the image-side surface  22  of the second lens element  20  is concave, and a periphery region  27  of the image-side surface  22  of the second lens element  20  is concave. Besides, both the object-side surface  21  and the image-side surface  22  of the second lens element  20  are aspherical surfaces, but it is not limited thereto. 
     The third lens element  30  has positive refracting power. An optical axis region  33  of the object-side surface  31  of the third lens element  30  is convex, and a periphery region  34  of the object-side surface  31  of the third lens element  30  is concave. An optical axis region  36  of the image-side surface  32  of the third lens element  30  is convex, and a periphery region  37  of the image-side surface  32  of the third lens element  30  is convex. Besides, both the object-side surface  31  and the image-side surface  32  of the third lens element  30  are aspherical surfaces, but it is not limited thereto. 
     The fourth lens element  40  has negative refracting power. An optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is convex, and a periphery region  44  of the object-side surface  41  of the fourth lens element  40  is concave. An optical axis region  46  of the image-side surface  42  of the fourth lens element  40  is concave, and a periphery region  47  of the image-side surface  42  of the fourth lens element  40  is convex. Besides, both the object-side surface  41  and the image-side surface  42  of the fourth lens element  40  are aspherical surfaces, but it is not limited thereto. 
     The fifth lens element  50  has negative refracting power. An optical axis region  53  of the object-side surface  51  of the fifth lens element  50  is concave, and a periphery region  54  of the object-side surface  51  of the fifth lens element  50  is concave. An optical axis region  56  of the image-side surface  52  of the fifth lens element  50  is convex, and a periphery region  57  of the image-side surface  52  of the fifth lens element  50  is convex. Besides, both the object-side surface  51  and the image-side surface  52  of the fifth lens element  50  are aspherical surfaces, but it is not limited thereto. 
     The sixth lens element  60  has positive refracting power. An optical axis region  63  of the object-side surface  61  of the sixth lens element  60  is convex, and a periphery region  64  of the object-side surface  61  of the sixth lens element  60  is concave. An optical axis region  66  of the image-side surface  62  of the sixth lens element  60  is concave, and a periphery region  67  of the image-side surface  62  of the sixth lens element  60  is convex. Besides, both the object-side surface  61  and the image-side surface  62  of the sixth lens element  60  are aspherical surfaces, but it is not limited thereto. 
     The seventh lens element  70  has negative refracting power. An optical axis region  73  of the object-side surface  71  of the seventh lens element  70  is concave, and a periphery region  74  of the object-side surface  71  of the seventh lens element  70  is concave. An optical axis region  76  of the image-side surface  72  of the seventh lens element  70  is concave, and a periphery region  77  of the image-side surface  72  of the seventh lens element  70  is convex. Besides, both the object-side surface  71  and the image-side surface  72  of the seventh lens element  70  are aspherical surfaces, but it is not limited thereto. 
     In the first lens element  10 , the second lens element  20 , the third lens element  30 , the fourth lens element  40 , the fifth lens element  50 , the sixth lens element  60  and the seventh lens element  70  of the optical imaging lens element  1  of the present invention, there are 14 surfaces, such as the object-side surfaces  11 / 21 / 31 / 41 / 51 / 61 / 71  and the image-side surfaces  12 / 22 / 32 / 42 / 52 / 62 / 72 . If a surface is aspherical, these aspheric coefficients are defined according to the following formula: 
               Z   ⁡     (   Y   )       =           Y   2     R     /     (     1   +       1   -       (     1   +   K     )     ⁢       Y   2       R   2               )       +       ∑     i   =   1     n     ⁢       a     2   ⁢   i       ×     Y     2   ⁢   i                   
In which:
 
R represents the curvature radius of the lens element surface;
 
Z represents the depth of an aspherical surface (the perpendicular distance between the point of the aspherical surface at a distance Y from the optical axis and the tangent plane of the vertex on the optical axis of the aspherical surface);
 
Y represents a vertical distance from a point on the aspherical surface to the optical axis;
 
K is a conic constant; and
 
a 2i  is the aspheric coefficient of the 2i th  order.
 
     The optical data of the first example of the optical imaging lens  1  are shown in  FIG. 28  while the aspheric surface data are shown in  FIG. 29 . In the present examples of the optical imaging lens, the f-number of the entire optical imaging lens element system is Fno, EFL is the effective focal length, HFOV stands for the half field of view which is half of the field of view of the entire optical imaging lens element system, and the unit for the curvature radius, the thickness and the focal length is in millimeters (mm). In this example, EFL=4.715 mm; HFOV=41.682 degrees; TTL=5.505 mm; Fno=1.550; ImgH=4.500 mm. 
     Second Example 
     Please refer to  FIG. 8  which illustrates the second example of the optical imaging lens  1  of the present invention. It is noted that from the second example to the following examples, in order to simplify the figures, only the components different from what the first example has, and the basic lens elements will be labeled in figures. Other components that are the same as what the first example has, such as the object-side surface, the image-side surface, the portion in a vicinity of the optical axis and the portion in a vicinity of its periphery will be omitted in the following examples. Please refer to  FIG. 9A  for the longitudinal spherical aberration on the image plane  91  of the second example, please refer to  FIG. 9B  for the field curvature aberration on the sagittal direction, please refer to  FIG. 9C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 9D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, an optical axis region  33  of the object-side surface  31  of the third lens element  30  is concave, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave. 
     The optical data of the second example of the optical imaging lens are shown in  FIG. 30  while the aspheric surface data are shown in  FIG. 31 . In this example, EFL=4.459 mm; HFOV=42.781 degrees; TTL=5.565 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The field curvature aberration on the sagittal direction in this example is smaller than the field curvature aberration on the sagittal direction in the first example; (3) The field curvature aberration on the tangential direction in this example is smaller than the field curvature aberration on the tangential direction in the first example; (4) The distortion aberration in this example is smaller than the distortion aberration in the first example; (5) The HFOV in this example is larger than the HFOV in the first example. 
     Third Example 
     Please refer to  FIG. 10  which illustrates the third example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 11A  for the longitudinal spherical aberration on the image plane  91  of the third example; please refer to  FIG. 11B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 11C  for the field curvature aberration on the tangential direction; and please refer to  FIG. 11D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave, an optical axis region  46  of the image-side surface  42  of the fourth lens element  40  is convex. 
     The optical data of the third example of the optical imaging lens are shown in  FIG. 32  while the aspheric surface data are shown in  FIG. 33 . In this example, EFL=4.523 mm; HFOV=43.004 degrees; TTL=5.737 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The distortion aberration in this example is smaller than the distortion aberration in the first example; (3) The HFOV in this example is larger than the HFOV in the first example. 
     Fourth Example 
     Please refer to  FIG. 12  which illustrates the fourth example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 13A  for the longitudinal spherical aberration on the image plane  91  of the fourth example; please refer to  FIG. 13B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 13C  for the field curvature aberration on the tangential direction; and please refer to  FIG. 13D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, an optical axis region  33  of the object-side surface  31  of the third lens element  30  is concave, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave, an optical axis region  46  of the image-side surface  42  of the fourth lens element  40  is convex. 
     The optical data of the fourth example of the optical imaging lens are shown in  FIG. 34  while the aspheric surface data are shown in  FIG. 35 . In this example, EFL=4.452 mm; HFOV=42.491 degrees; TTL=5.532 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The HFOV in this example is larger than the HFOV in the first example. 
     Fifth Example 
     Please refer to  FIG. 14  which illustrates the fifth example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 15A  for the longitudinal spherical aberration on the image plane  91  of the fifth example; please refer to  FIG. 15B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 15C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 15D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, the fourth lens element  40  has positive refracting power. 
     The optical data of the fifth example of the optical imaging lens are shown in  FIG. 36  while the aspheric surface data are shown in  FIG. 37 . In this example, EFL=4.152 mm; HFOV=43.507 degrees; TTL=5.334 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The field curvature aberration on the tangential direction in this example is smaller than the field curvature aberration on the tangential direction in the first example; (2) The HFOV in this example is larger than the HFOV in the first example; (3) The system length of the optical imaging lens TTL in this example is shorter than the system length of the optical imaging lens TTL in the first example. 
     Sixth Example 
     Please refer to  FIG. 16  which illustrates the sixth example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 17A  for the longitudinal spherical aberration on the image plane  91  of the sixth example; please refer to  FIG. 17B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 17C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 17D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, an optical axis region  33  of the object-side surface  31  of the third lens element  30  is concave, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave, an optical axis region  46  of the image-side surface  42  of the fourth lens element  40  is convex. 
     The optical data of the sixth example of the optical imaging lens are shown in  FIG. 38  while the aspheric surface data are shown in  FIG. 39 . In this example, EFL=4.604 mm; HFOV=43.611 degrees; TTL=5.678 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The field curvature aberration on the tangential direction in this example is smaller than the field curvature aberration on the tangential direction in the first example; (3) The distortion aberration in this example is smaller than the distortion aberration in the first example; (4) The HFOV in this example is larger than the HFOV in the first example. 
     Seventh Example 
     Please refer to  FIG. 18  which illustrates the seventh example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 19A  for the longitudinal spherical aberration on the image plane  91  of the seventh example; please refer to  FIG. 19B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 19C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 19D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave, a periphery region  47  of the image-side surface  42  of the fourth lens element  40  is concave. 
     The optical data of the seventh example of the optical imaging lens are shown in  FIG. 40  while the aspheric surface data are shown in  FIG. 41 . In this example, EFL=4.481 mm; HFOV=43.702 degrees; TTL=5.584 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The field curvature aberration on the tangential direction in this example is smaller than the field curvature aberration on the tangential direction in the first example; (3) The distortion aberration in this example is smaller than the distortion aberration in the first example; (4) The HFOV in this example is larger than the HFOV in the first example. 
     Eighth Example 
     Please refer to  FIG. 20  which illustrates the eighth example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 21A  for the longitudinal spherical aberration on the image plane  91  of the eighth example; please refer to  FIG. 21B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 21C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 21D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, the second lens element  20  has positive refracting power, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave. 
     The optical data of the eighth example of the optical imaging lens are shown in  FIG. 50  while the aspheric surface data are shown in  FIG. 51 . In this example, EFL=4.540 mm; HFOV=43.517 degrees; TTL=5.966 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The field curvature aberration on the sagittal direction in this example is smaller than the field curvature aberration on the sagittal direction in the first example; (3) The distortion aberration in this example is smaller than the distortion aberration in the first example; (4) The HFOV in this example is larger than the HFOV in the first example. 
     Ninth Example 
     Please refer to  FIG. 22  which illustrates the ninth example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 23A  for the longitudinal spherical aberration on the image plane  91  of the ninth example; please refer to  FIG. 23B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 23C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 23D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, an optical axis region  33  of the object-side surface  31  of the third lens element  30  is concave, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave, an optical axis region  46  of the image-side surface  42  of the fourth lens element  40  is convex. 
     The optical data of the ninth example of the optical imaging lens are shown in  FIG. 44  while the aspheric surface data are shown in  FIG. 45 . In this example, EFL=4.489 mm; HFOV=43.690 degrees; TTL=5.694 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The field curvature aberration on the tangential direction in this example is smaller than the field curvature aberration on the tangential direction in the first example; (3) The distortion aberration in this example is smaller than the distortion aberration in the first example; (4) The HFOV in this example is larger than the HFOV in the first example. 
     Tenth Example 
     Please refer to  FIG. 24  which illustrates the tenth example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 25A  for the longitudinal spherical aberration on the image plane  91  of the tenth example; please refer to  FIG. 25B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 25C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 25D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, the sixth lens element  60  has negative refracting power, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave. 
     The optical data of the tenth example of the optical imaging lens are shown in  FIG. 46  while the aspheric surface data are shown in  FIG. 47 . In this example, EFL=4.303 mm; HFOV=43.256 degrees; TTL=5.385 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The field curvature aberration on the tangential direction in this example is smaller than the field curvature aberration on the tangential direction in the first example; (2) The distortion aberration in this example is smaller than the distortion aberration in the first example; (3) The system length of the optical imaging lens TTL in this example is shorter than the system length of the optical imaging lens TTL in the first example; (4) The HFOV in this example is larger than the HFOV in the first example. 
     Eleventh Example 
     Please refer to  FIG. 26  which illustrates the eleventh example of the optical imaging lens  1  of the present invention. Please refer to  FIG. 27A  for the longitudinal spherical aberration on the image plane  91  of the eleventh example; please refer to  FIG. 27B  for the field curvature aberration on the sagittal direction; please refer to  FIG. 27C  for the field curvature aberration on the tangential direction, and please refer to  FIG. 27D  for the distortion aberration. The components in this example are similar to those in the first example, but the optical data such as the curvature radius, the lens thickness, the aspheric surface or the back focal length in this example are different from the optical data in the first example. Besides, in this example, the seventh lens element  70  has positive refracting power, an optical axis region  33  of the object-side surface  31  of the third lens element  30  is concave, an optical axis region  43  of the object-side surface  41  of the fourth lens element  40  is concave, an optical axis region  76  of the image-side surface  72  of the seventh lens element  70  is convex. 
     The optical data of the eleventh example of the optical imaging lens are shown in  FIG. 48  while the aspheric surface data are shown in  FIG. 49 . In this example, EFL=4.424 mm; HFOV=43.783 degrees; TTL=6.094 mm; Fno=1.550; ImgH=4.500 mm. In particular: (1) The longitudinal spherical aberration in this example is smaller than the longitudinal spherical aberration in the first example; (2) The HFOV in this example is larger than the HFOV in the first example. 
     Some important ratios in each example are shown in  FIG. 50  and  FIG. 51 . 
     Each embodiment of the present invention provides an optical imaging lens which has good imaging quality. For example, the following lens curvature configuration may effectively reduce the field curvature aberration and the distortion aberration to optimize the imaging quality of the optical imaging lens. Furthermore, the present invention has the corresponding advantages: 
     1. According to each example of the invention, by designing each surface shape, for example: the periphery region  34  of the object-side surface  31  of the third lens element  30  is concave, the periphery region  44  of the object-side surface  41  of the fourth lens element  40  is concave, the fifth lens element  50  has negative refracting power, the periphery region  54  of the object-side surface  51  of the fifth lens element  50  is concave, the optical axis region  66  of the image-side surface  62  of the sixth lens element  60  is concave, when the surface shapes mentioned above matching one of the two conditions: the optical axis region  13  of the object-side surface  11  of the first lens element  10  is convex, or the periphery region  17  of the image-side surface  12  of the first lens element  10  is concave, and the periphery region  27  of the image-side surface  22  of the second lens element  20  is concave. If the conditions mentioned above are satisfied, the luminous flux of the whole optical imaging lens system can be effectively increased, and the optical imaging lens has good imaging quality.
 
2. Furthermore, if the condition of: (G45+T5+G56+T6+G67+T7)/(T1+G12+T2)≥3.200 is satisfied, the system length of the optical imaging lens  1  can be effectively decreased, and the preferable range is 3.200≤(G45+T5+G56+T6+G67+T7)/(T1+G12+T2)≤4.100.
 
3. In order to reduce the system length of the optical imaging lens  1  along the optical axis I and simultaneously to ensure the imaging quality, the air gaps between the adjacent lens elements or the thickness of each lens element should be appropriately adjusted. However, the assembly or the manufacturing difficulty should be taken into consideration as well. If the following numerical conditions are selectively satisfied, the optical imaging lens  1  of the present invention may have better optical arrangements:
 
 TTL/AAG≤ 3.200, and the preferable range is 2.000≤ TTL/AAG≤ 3.200;  (1)
 
( EFL+BFL )/ AAG≤ 3.000, and the preferable range is 1.800≤( EFL+BFL )/ AAG≤ 3.000;  (2)
 
 TL /( T 2+ T 4+ T 7)≥4.200, and the preferable range is 4.200≤ TL /( T 2+ T 4+ T 7)≤10.700;  (3)
 
 ALT /( T 2+ G 23+ T 3)≤3.200, and the preferable range is 2.100≤ ALT /( T 2+ G 23+ T 3)≤3.200;  (4)
 
( ALT+BFL )/( T 3+ G 34+ T 4)≥4.000, and the preferable range is 4.000≤( ALT+BFL )/( T 3+ G 34+ T 4)≤5.900;  (5)
 
( EFL+AAG )/( G 45+ G 56+ G 67)≤5.100, and the preferable range is 3.300≤( EFL+AAG )/( G 45+ G 56+ G 67)≤5.100;  (6)
 
 TTL /( G 12+ G 23+ G 45)≤7.000, and the preferable range is 4.200≤ TTL /( G 12+ G 23+ G 45)≤7.000;  (7)
 
( T 4+ T 5+ T 6)/( T 2+ T 3)≤3.000, and the preferable range is 1.000≤( T 4+ T 5+ T 6)/( T 2+ T 3)≤3.000;  (8)
 
( T 3+ G 34+ T 4)/ T 1≤2.500, and the preferable range is 0.600≤( T 3+ G 34+ T 4)/ T 1≤2.500;  (9)
 
( G 23+ G 67)/( T 2+ T 6)≥1.000, and the preferable range is 1.000≤( G 23+ G 67)/( T 2+ T 6)≤3.200;  (10)
 
( T 6+ T 7)/( T 3+ T 4)≥1.000, and the preferable range is 1.000≤( T 6+ T 7)/( T 3+ T 4)≤2.400;  (11)
 
 TL /( G 12+ G 23+ G 34)≥8.800, and the preferable range is 8.800≤ TL /( G 12+ G 23+ G 34)≤13.600;  (12)
 
 TL /( G 45+ T 5+ G 56)≤6.000, and the preferable range is 4.000≤ TL /( G 45+ T 5+ G 56)≤6.000;  (13)
 
( EFL+AAG )/( ALT+BFL )≥1.700, and the preferable range is 1.700≤( EFL+AAG )/( ALT+BFL )≤2.500;  (14)
 
( G 23+ T 3+ G 34)/( T 4+ T 5)≥1.100, and the preferable range is 1.100≤( G 23+ T 3+ G 34)/( T 4+ T 5)≤2.000;  (15)
 
( G 45+ G 56+ G 67)/( G 12+ G 23+ G 34)≥2.580, and the preferable range is 2.580≤( G 45+ G 56+ G 67)/( G 12+ G 23+ G 34)≤4.800;  (16)
 
( T 1+ T 2+ G 23)/( T 5+ G 56)≥1.700, and the preferable range is 1.700≤( T 1+ T 2+ G 23)/( T 5+ G 56)≤4.900; and  (17)
 
 TTL /( G 23+ G 45)≤6.100, and the preferable range is 4.300≤ TTL /( G 23+ G 45)≤6.100.  (18)
 
     By observing three representative wavelengths of 470 nm, 555 nm and 650 nm in each embodiment of the present invention, it is suggested off-axis light of different heights of every wavelength all concentrates on the image plane, and deviations of every curve also reveal that off-axis light of different heights are well controlled so the examples do improve the spherical aberration, the astigmatic aberration and the distortion aberration. In addition, by observing the imaging quality data the distances amongst the three representing different wavelengths of 470 nm, 555 nm and 650 nm are pretty close to one another, which means the embodiments of the present invention are able to concentrate light of the three representing different wavelengths so that the aberration is greatly improved. Given the above, it is understood that the embodiments of the present invention provides outstanding imaging quality. 
     The numeral value ranges within the maximum and minimum values obtained from the combination ratio relationships of the optical parameters disclosed in each embodiment of the invention can all be implemented accordingly. 
     In addition, any arbitrary combination of the parameters of the embodiments can be selected to increase the lens limitation so as to facilitate the design of the same structure of the present invention. 
     In the light of the unpredictability of the optical imaging lens, the present invention suggests the above principles to have a shorter system length of the optical imaging lens, a larger aperture available, better imaging quality or a better fabrication yield to overcome the drawbacks of prior art. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.