Patent Publication Number: US-10330895-B2

Title: Camera optical lens

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the priority benefit of Chinese Patent Applications Ser. No. 201710975253.4 and Ser. No. 201710975235.6 filed on Oct. 19, 2017, the entire content of which is incorporated herein by reference. 
     FIELD OF THE PRESENT DISCLOSURE 
     The present disclosure relates to optical lens, in particular to a camera optical lens suitable for handheld devices such as smart phones and digital cameras and imaging devices. 
     DESCRIPTION OF RELATED ART 
     With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but the photosensitive devices of general camera lens are no other than Charge Coupled Device (CCD) or Complementary metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices shrink, coupled with the current development trend of electronic products being that their functions should be better and their shape should be thin and small, miniature camera lens with good imaging quality therefor has become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. And, with the development of technology and the increase of the diverse demands of users, and under this circumstances that the pixel area of photosensitive devices is shrinking steadily and the requirement of the system for the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens design. There is an urgent need for ultra-thin wide-angle camera lenses which have good optical characteristics and the chromatic aberration of which is fully corrected. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. 
         FIG. 1  is a schematic diagram of a camera optical lens in accordance with a first embodiment of the present invention; 
         FIG. 2  shows the longitudinal aberration of the camera optical lens shown in  FIG. 1 ; 
         FIG. 3  shows the lateral color of the camera optical lens shown in  FIG. 1 ; 
         FIG. 4  presents a schematic diagram of the field curvature and distortion of the camera optical lens shown in  FIG. 1 ; 
         FIG. 5  is a schematic diagram of a camera optical lens in accordance with a second embodiment of the present invention; 
         FIG. 6  presents the longitudinal aberration of the camera optical lens shown in  FIG. 5 ; 
         FIG. 7  presents the lateral color of the camera optical lens shown in  FIG. 5 ; 
         FIG. 8  presents the field curvature and distortion of the camera optical lens shown in  FIG. 5 . 
     
    
    
     DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS 
     The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure. 
     Embodiment 1 
     As referring to  FIG. 1 , the present invention provides a camera optical lens  10 .  FIG. 1  shows the camera optical lens  10  of embodiment 1 of the present invention, the camera optical lens  10  comprises 7 lenses. Specifically, from the object side to the image side, the camera optical lens  10  comprises in sequence: an aperture S1, a first lens L 1 , a second lens L 2 , a third lens L 3 , a fourth lens L 4 , a fifth lens L 5 , a sixth lens L 6  and a seventh lens L 7 . Optical element like optical filter GF can be arranged between the seventh lens L 7  and the image surface Si. The first lens L 1  is made of plastic material, the second lens L 2  is made of plastic material, the third lens L 3  is made of plastic material, the fourth lens L 4  is made of glass material, the fifth lens L 5  is made of glass material, the sixth lens L 6  is made of plastic material, the seventh lens L 7  is made of plastic material. 
     Here, the focal length of the whole camera optical lens is defined as f, the focal length of the first lens L 1  is defined as f1, the focal length of the third lens L 3 is defined as f3, the focal length of the fourth lens L 4  is defined as f4, the refractive index of the fourth lens L 4  is defined as n4, the refractive index of the fifth lens L 5  is defined as n5, the curvature radius of the object side surface of the seventh lens L 7  is defined as R13, the curvature radius of the image side surface of the seventh lens L 7  is defined as R14, a total optical length (a total distance from an object side surface of the first lens to an image surface along the optic axis) is defined as TTL. The f, f1, f3, f4, n4, d7, TTL, R13 and R14 satisfy the following conditions: 1≤f1/f≤1.5; 1.7≤n4≤2.2; −2≤f3/f4≤2; 0.5≤(R13+R14)/(R13−R14)≤10; 1.7≤n5≤2.2. 
     Condition 1≤f1/f≤1.5 fixes the positive refractive power of the first lens L 1 . If the lower limit of the set value is exceeded, although it benefits the ultra thin development of lenses, but the positive refractive power of the first lens L will be too strong, problem like aberration is difficult to be corrected, and it is also unfavorable for wide-angle development of lens. On the contrary, if the higher limit of the set value is exceeded, the positive refractive power of the first lens becomes too weak, it is then difficult to develop ultra thin lenses. Preferably, the following condition shall be satisfied, 1.19≤f1/f≤1.44. 
     Condition 1.7≤n4≤2.2 fixes the refractive index of the fourth lens L 4 , refractive index within this range benefits the ultra thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.7≤n4≤2.01. 
     Condition −2≤f3/f4≤2 fixes the ratio between the focal length f3 of the third lens L 3  and the focal length f4 of the fourth lens L 4 , a ratio within this range can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the following condition shall be satisfied, −2≤f3/f4≤1.37. 
     Condition 0.5≤(R13+R14)/(R13−R14)≤10 fixes the shape of the seventh lens L 7 , when the value is beyond this range, with the development into the direction of ultra thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, 0.51≤(R13+R14)/(R13−R14)≤5.23. 
     Condition 1.7≤n5≤2.2 fixes the refractive index of the fifth lens L 5 , refractive index within this range benefits the ultra thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.78≤n5≤2.03. 
     When the focal length of the camera optical lens  10  of the present invention, the focal length of each lens, the refractive power of the related lens, and the total optical length, the thickness on-axis and the curvature radius of the camera optical lens satisfy the above conditions, the camera optical lens  10  has the advantage of high performance and satisfies the design requirement of low TTL. 
     In this embodiment, the focal length of the whole camera optical lens is f, the focal length of the first lens L 1  is f1, the curvature radius of the object side surface of the first lens L 1  is R1, the curvature radius of the image side surface of the first lens L 1  is R2 and the thickness on-axis of the first lens L 1  is d1, they satisfy the following condition: −4.94≤(R1+R2)/(R1−R2)≤−1.54, this condition reasonably controls the shape of the first lens, then the first lens can effectively correct the spherical aberration of the system; if the condition 0.25≤d1≤0.78 is satisfied it is beneficial for the realization of ultra-thin lens. Preferably, the following condition shall be satisfied, −3.09≤(R1+R2)/(R1−R2)≤−1.92; 0.41≤d1≤0.62. 
     In this embodiment, the focal length of the whole camera optical lens  10  is f, the focal length of the second lens L 2  is f2, the curvature radius of the object side surface of the second lens L 2  is R3, the curvature radius of image side surface of the second lens L 2  is R4 and the thickness on-axis of the second lens L 2  is d3, they satisfy the following condition: when the condition −14.05≤f2/f≤−3.84 is satisfied, the negative refractive power of the second lens L 2  is controlled within reasonable scope, the negative spherical aberration caused by the first lens L which has positive refractive power and the field curvature of the system then can be reasonably and effectively balanced; the condition 5.63≤(R3+R4)/(R3−R4)≤20.47 fixes the shape of the second lens L 2 , when value is beyond this range, with the development into the direction of ultra thin and wide-angle lenses, problem like on-axis chromatic aberration is difficult to be corrected; if the condition 0.11≤d3≤0.41 is satisfied, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, −8.78≤f2/f≤−4.8; 9.01≤(R3+R4)/(R3−R4)≤16.37; 0.18≤d3≤0.33. 
     In this embodiment, the focal length of the whole camera optical lens  10  is f, the focal length of the third lens L 3  is f3, the curvature radius of the object side surface of the third lens L 3  is R5, the curvature radius of the image side surface of the third lens L 3  is R6 and the thickness on-axis of the third lens L 3  is d5, they satisfy the condition: −1.45≤f3/f≤4.68, by meeting this condition, it is helpful for the system to obtain good ability in balancing the field curvature, so that the image quality can be effectively improved; by meeting the condition 0.15≤(R5+R6)/(R5−R6)≤0.55 the shape of the third lens L 3  can be effectively controlled, it is beneficial for the shaping of the third lens L 3  and bad shaping and stress generation due to extra large curvature of surface of the third lens L 3  can be avoided; when the condition 0.28≤d5≤0.84 is satisfied, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, 2.31≤f3/f≤3.74; 0.24≤(R5+R6)/(R5−R6)≤0.44; 0.45≤d5≤0.68. 
     In this embodiment, the focal length of the whole camera optical lens  10  is f, the focal length of the fourth lens L 4  is f4, the curvature radius of the object side surface of the fourth lens L 4  is R7, the curvature radius of the image side surface of the fourth lens L 4  is R8 and the thickness on-axis of the fourth lens L 4  is d7, they satisfy the condition: −7.73≤f4/f≤−1.04, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition 1.09≤(R7+R8)/(R7−R8)≤6.49 fixes the shape of the fourth lens L 4 , when beyond this range, with the development into the direction of ultra thin and wide-angle lens, the problem like chromatic aberration is difficult to be corrected; when the condition 0.12≤d7≤0.35 is satisfied, it is beneficial for realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, −4.83≤f4/f4≤−1.3; 1.75≤(R7+R8)/(R7−R8)≤5.19; 0.18≤d7≤0.28. 
     In this embodiment, the focal length of the whole camera optical lens  10  is f, the focal length of the fifth lens L 5  is f5, the curvature radius of the object side surface of the fifth lens L 5  is R9, the curvature radius of the image side surface of the fifth lens L 5  is R10 and the thickness on-axis of the fifth lens L 5  is d9, they satisfy the condition: 0.85≤f5/f≤9.19, the limitation on the fifth lens L 5  can effectively make the light angle of the camera lens flat and the tolerance sensitivity reduces; the condition −1.96≤(R9+R10)/(R9−R10)≤−0.62 fixes the shape of the fifth lens L 5 , when beyond this range, with the development into the direction of ultra thin and wide-angle lens, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.10≤d9≤0.30 is satisfied, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, 1.37≤f5/f≤7.35; −1.23≤(R9+R10)/(R9−R10)≤−0.78; 0.16≤d 9 ≤0.24. 
     In this embodiment, the focal length of the whole camera optical lens  10  is f, the focal length of the sixth lens L 6  is f6, the curvature radius of the object side surface of the sixth lens L 6  is R11, the curvature radius of the image side surface of the sixth lens L 6  is R12 and the thickness on-axis of the sixth lens L 6  is d11, they satisfy the condition: 0.50≤f6/f≤1.61, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −1.05≤(R11+R12)/(R11−R12)≤0.07 fixes the shape of the sixth lens L 6 , when beyond this range, with the development into the direction of ultra thin and wide-angle lenses, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.21≤d11≤0.67, is satisfied, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, 0.8≤f6/f≤1.29; −0.65≤(R11+R12)/(R11−R12)≤0.05; 0.34≤d11≤0.54. 
     In this embodiment, the focal length of the whole camera optical lens  10  is f, the focal length of the seventh lens L 7  is f7 and the thickness on-axis of the seventh lens L 7  is d13, they satisfy the condition −1.38≤f7/f≤−0.44, appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; when the condition 0.13≤d13≤0.41 is satisfied, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, −0.86≤f7/f≤−0.55; 0.21≤d13≤0.33. 
     In this embodiment, the total optical length TTL of the camera optical lens  10  is less than or equal to 5.12 mm, it is beneficial for the realization of ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens  10  is less than or equal to 4.89. 
     In this embodiment, the aperture F number of the camera optical lens  10  is less than or equal to 1.89. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens  10  is less than or equal to 1.85. 
     With such design, the total optical length TTL of the whole camera optical lens  10  can be made as short as possible, thus the miniaturization characteristics can be maintained. 
     In the following, an example will be used to describe the camera optical lens  10  of the present invention. The symbols recorded in each example are as follows. The unit of distance, radius and center thickness is mm. 
     TTL: Optical length (the total distance from an object side surface of the first lens L 1  to the image surface along the optic axis). 
     Preferably, inflexion points and/or arrest points can also be arranged on the object side surface and/or image side surface of the lens, so that the demand for high quality imaging can be satisfied, the description below can be referred for specific implementable scheme. 
     The design information of the camera optical lens  10  in the first embodiment of the present invention is shown in the following, the unit of the focal length, distance, radius and center thickness is mm. 
     The design information of the camera optical lens  10  in the first embodiment of the present invention is shown in the tables 1 and 2. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 R 
                 d 
                 nd 
                 νd 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 S1 
                 ∞ 
                 d0= 
                 −0.300 
                   
                   
                   
                   
               
               
                 R1 
                 1.718 
                 d1= 
                 0.518 
                 nd1 
                 1.5440 
                 ν1 
                 56.10 
               
               
                 R2 
                 4.056 
                 d2= 
                 0.030 
               
               
                 R3 
                 1.595 
                 d3= 
                 0.225 
                 nd2 
                 1.6600 
                 ν2 
                 20.41 
               
               
                 R4 
                 1.378 
                 d4= 
                 0.476 
               
               
                 R5 
                 17.811 
                 d5= 
                 0.557 
                 nd3 
                 1.5440 
                 ν3 
                 56.10 
               
               
                 R6 
                 −9.511 
                 d6= 
                 0.084 
               
               
                 R7 
                 6.643 
                 d7= 
                 0.230 
                 nd4 
                 1.7000 
                 ν4 
                 23.00 
               
               
                 R8 
                 2.475 
                 d8= 
                 0.043 
               
               
                 R9 
                 5.391 
                 d9= 
                 0.200 
                 nd5 
                 1.8500 
                 ν5 
                 23.80 
               
               
                 R10 
                 −601.005 
                 d10= 
                 0.269 
               
               
                 R11 
                 4.134 
                 d11= 
                 0.450 
                 nd6 
                 1.5440 
                 ν6 
                 56.10 
               
               
                 R12 
                 −3.778 
                 d12= 
                 0.498 
               
               
                 R13 
                 −5.377612 
                 d13= 
                 0.274 
                 nd7 
                 1.5350 
                 νg 
                 56.10 
               
               
                 R14 
                 1.743159 
                 d14= 
                 0.174 
               
               
                 R15 
                 ∞ 
                 d15= 
                 0.210 
                 ndg 
                 1.5160 
                 νg 
                 64.16 
               
               
                 R16 
                 ∞ 
                 d16= 
                 0.363 
               
               
                   
               
            
           
         
       
     
     In which, the meaning of the various symbols is as follows. 
     S1: Aperture; 
     R: The curvature radius of the optical surface, the central curvature radius in case of lens; 
     R1: The curvature radius of the object side surface of the first lens L 1 ; 
     R2: The curvature radius of the image side surface of the first lens L 1 ; 
     R3: The curvature radius of the object side surface of the second lens L 2 ; 
     R4: The curvature radius of the image side surface of the second lens L 2 ; 
     R5: The curvature radius of the object side surface of the third lens L 3 ; 
     R6: The curvature radius of the image side surface of the third lens L 3 ; 
     R7: The curvature radius of the object side surface of the fourth lens L 4 ; 
     R8: The curvature radius of the image side surface of the fourth lens L 4 ; 
     R9: The curvature radius of the object side surface of the fifth lens L 5 ; 
     R10: The curvature radius of the image side surface of the fifth lens L 5 ; 
     R11: The curvature radius of the object side surface of the sixth lens L 6 ; 
     R12: The curvature radius of the image side surface of the sixth lens L 6 ; 
     R13: The curvature radius of the object side surface of the seventh lens L 7 ; 
     R14: The curvature radius of the image side surface of the seventh lens L 7 ; 
     R15: The curvature radius of the object side surface of the optical filter GF; 
     R16: The curvature radius of the image side surface of the optical filter GF; 
     d: The thickness on-axis of the lens and the distance on-axis between the lens; 
     d0: The distance on-axis from aperture S1 to the object side surface of the first lens L 1 ; 
     d1: The thickness on-axis of the first lens L 1 ; 
     d2: The distance on-axis from the image side surface of the first lens L 1  to the object side surface of the second lens L 2 ; 
     d3: The thickness on-axis of the second lens L 2 ; 
     d4: The distance on-axis from the image side surface of the second lens L 2  to the object side surface of the third lens L 3 ; 
     d5: The thickness on-axis of the third lens L 3 ; 
     d6: The distance on-axis from the image side surface of the third lens L 3  to the object side surface of the fourth lens L 4 ; 
     d7: The thickness on-axis of the fourth lens L 4 ; 
     d8: The distance on-axis from the image side surface of the fourth lens L 4  to the object side surface of the fifth lens L 5 ; 
     d9: The thickness on-axis of the fifth lens L 5 ; 
     d10: The distance on-axis from the image side surface of the fifth lens L 5  to the object side surface of the sixth lens L 6 ; 
     d11: The thickness on-axis of the sixth lens L 6 ; 
     d12: The distance on-axis from the image side surface of the sixth lens L 6  to the object side surface of the seventh lens L 7 ; 
     d13: The thickness on-axis of the seventh lens L 7 ; 
     d14: The distance on-axis from the image side surface of the seventh lens L 7  to the object side surface of the optical filter GF; 
     d15: The thickness on-axis of the optical filter GF; 
     d16: The distance on-axis from the image side surface to image surface of the optical filter GF; 
     nd: The refractive index of the d line; 
     nd1: The refractive index of the d line of the first lens L 1 ; 
     nd2: The refractive index of the d line of the second lens L 2 ; 
     nd3: The refractive index of the d line of the third lens L 3 ; 
     nd4: The refractive index of the d line of the fourth lens L 4 ; 
     nd5: The refractive index of the d line of the fifth lens L 5 ; 
     nd6: The refractive index of the d line of the sixth lens L 6 ; 
     nd7: The refractive index of the d line of the seventh lens L 7 ; 
     ndg: The refractive index of the d line of the optical filter GF; 
     vd: The abbe number; 
     v1: The abbe number of the first lens L 1 ; 
     v2: The abbe number of the second lens L 2 ; 
     v3: The abbe number of the third lens L 3 ; 
     v4: The abbe number of the fourth lens L 4 ; 
     v5: The abbe number of the fifth lens L 5 ; 
     v6: The abbe number of the sixth lens L 6 ; 
     v7: The abbe number of the seventh lens L 7 ; 
     vg: The abbe number of the optical filter GF; 
     Table 2 shows the aspherical surface data of the camera optical lens  10  in the embodiment 1 of the present invention. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 2 
               
             
            
               
                   
                   
               
               
                   
                 Conic Index 
                 Aspherical Surface Index 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 k 
                 A4 
                 A6 
                 A8 
                 A10 
                 A12 
                 A14 
                 A16 
               
               
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 R1 
                 −6.7766E−01 
                  2.8576E−02 
                 −3.9611E−02  
                  1.0968E−01 
                 −1.7636E−01  
                  1.3972E−01 
                 −4.4480E−02  
                 −3.5549E−03 
               
               
                 R2 
                 −7.6593E+00 
                 −6.7170E−01 
                 2.4023E+00 
                 −5.3440E+00 
                 7.6252E+00 
                 −6.7402E+00 
                 3.3383E+00 
                 −7.1219E−01 
               
               
                 R3 
                 −2.5264E+00 
                 −7.2819E−01 
                 2.2111E+00 
                 −4.3599E+00 
                 5.7891E+00 
                 −4.8384E+00 
                 2.2895E+00 
                 −4.7072E−01 
               
               
                 R4 
                 −9.1161E−02 
                 −2.4290E−01 
                 3.0984E−01 
                 −1.0157E−02 
                 −6.1052E−01  
                  1.0383E+00 
                 −7.3431E−01  
                  1.9415E−01 
               
               
                 R5 
                  8.9988E+01 
                 −9.2976E−02 
                 1.5371E−01 
                 −8.4203E−01 
                 1.8984E+00 
                 −2.5658E+00 
                 1.8524E+00 
                 −5.5504E−01 
               
               
                 R6 
                  6.4968E+01 
                 −3.0601E−01 
                 5.7846E−01 
                 −1.2843E+00 
                 1.6987E+00 
                 −1.3538E+00 
                 6.1215E−01 
                 −1.2322E−01 
               
               
                 R7 
                  2.6900E+00 
                 −5.7135E−01 
                 1.0840E+00 
                 −1.5471E+00 
                 1.4668E+00 
                 −8.1323E−01 
                 2.4085E−01 
                 −2.9745E−02 
               
               
                 R8 
                 −1.9255E+01 
                 −2.5779E−01 
                 4.4298E−01 
                 −6.9526E−01 
                 6.5050E−01 
                 −3.3850E−01 
                 9.3822E−02 
                 −1.0798E−02 
               
               
                 R9 
                 −9.0000E+01 
                  5.7351E−02 
                 −9.3304E−02  
                  7.6371E−03 
                 2.6879E−02 
                 −7.7990E−03 
                 −4.2265E−03  
                  1.7583E−03 
               
               
                 R10 
                  0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
               
               
                 R11 
                  5.3021E+00 
                 −5.7632E−02 
                 7.8693E−02 
                 −2.0837E−01 
                 1.9874E−01 
                 −9.4202E−02 
                 2.2393E−02 
                 −2.2524E−03 
               
               
                 R12 
                 −8.1590E+00 
                  1.5828E−02 
                 1.3092E−01 
                 −2.7464E−01 
                 2.1387E−01 
                 −8.2300E−02 
                 1.5550E−02 
                 −1.1490E−03 
               
               
                 R13 
                 −6.8148E+00 
                 −8.1897E−02 
                 −4.1522E−03  
                 −1.2659E−02 
                 1.7642E−02 
                 −5.6302E−03 
                 7.0757E−04 
                 −3.1500E−05 
               
               
                 R14 
                 −8.4365E+00 
                 −7.4486E−02 
                 2.2375E−02 
                 −4.8911E−03 
                 7.0691E−04 
                 −8.0193E−05 
                 5.1531E−06 
                 −1.2725E−07 
               
               
                   
               
            
           
         
       
     
     Among them, K is a conic index, A4, A6, A8, A10, A12, A14, A16 are aspheric surface indexes. 
     IH: Image height
 
 y =( x   2   /R )/[1+{(1−( k+ 1)( x   2   /R   2 )} 1/2 ]+ A 4 x   4   +A 6 x   6   +A 8 x   8   +A 10 x   10   +A 12 x   12   +A 14 x   14   +A 16 x   16   (1)
 
     For convenience, the aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (1). However, the present invention is not limited to the aspherical polynomials form shown in the condition (1). 
     Table 3 and table 4 show the inflexion points and the arrest point design data of the camera optical lens  10  lens in embodiment 1 of the present invention. In which, R1 and R2 represent respectively the object side surface and image side surface of the first lens L 1 , R3 and R4 represent respectively the object side surface and image side surface of the second lens L 2 , R5 and R6 represent respectively the object side surface and image side surface of the third lens L 3 , R 7  and R8 represent respectively the object side surface and image side surface of the fourth lens L 4 , R9 and R10 represent respectively the object side surface and image side surface of the fifth lens L 5 , R11 and R12 represent respectively the object side surface and image side surface of the sixth lens L 6 , R13 and R14 represent respectively the object side surface and image side surface of the seventh lens L 7 . The data in the column named “inflexion point position” are the vertical distances from the inflexion points arranged on each lens surface to the optic axis of the camera optical lens  10 . The data in the column named “arrest point position” are the vertical distances from the arrest points arranged on each lens surface to the optic axis of the camera optical lens  10 . 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 3 
               
               
                   
                   
               
               
                   
                 Inflexion 
                 Inflexion 
                 Inflexion 
                 Inflexion 
               
               
                   
                 point 
                 point 
                 point 
                 point 
               
               
                   
                 number 
                 position 1 
                 position 2 
                 position 3 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 R1 
                 0 
                   
                   
                   
               
               
                   
                 R2 
                 3 
                 0.235 
                 0.525 
                 0.805 
               
               
                   
                 R3 
                 1 
                 0.985 
               
               
                   
                 R4 
                 0 
               
               
                   
                 R5 
                 1 
                 0.305 
               
               
                   
                 R6 
                 0 
               
               
                   
                 R7 
                 2 
                 0.165 
                 0.925 
               
               
                   
                 R8 
                 2 
                 0.365 
                 1.165 
               
               
                   
                 R9 
                 2 
                 0.625 
                 1.375 
               
               
                   
                 R10 
                 0 
               
               
                   
                 R11 
                 1 
                 0.635 
               
               
                   
                 R12 
                 3 
                 0.375 
                 0.635 
                 1.685 
               
               
                   
                 R13 
                 1 
                 1.315 
               
               
                   
                 R14 
                 1 
                 0.485 
               
               
                   
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 4 
               
               
                   
                   
               
               
                   
                 Arrest point 
                 Arrest point 
                 Arrest point 
               
               
                   
                 number 
                 position 1 
                 position 2 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 R1 
                 0 
                   
                   
               
               
                   
                 R2 
                 1 
                 0.965 
               
               
                   
                 R3 
                 0 
               
               
                   
                 R4 
                 0 
               
               
                   
                 R5 
                 1 
                 0.485 
               
               
                   
                 R6 
                 0 
               
               
                   
                 R7 
                 0.285 
                 1.215 
               
               
                   
                 R8 
                 0.725 
                 1.355 
               
               
                   
                 R9 
                 1 
                 0.965 
               
               
                   
                 R10 
                 0 
               
               
                   
                 R11 
                 1 
                 1.015 
               
               
                   
                 R12 
                 0 
               
               
                   
                 R13 
                 0 
               
               
                   
                 R14 
                 1 
                 0.995 
               
               
                   
                   
               
            
           
         
       
     
       FIG. 2  and  FIG. 3  show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 550 nm and 650 nm passes the camera optical lens  10  in the first embodiment.  FIG. 4  shows the field curvature and distortion schematic diagrams after light with a wavelength of 470 nm passes the camera optical lens  10  in the first embodiment, the field curvature S in  FIG. 4  is a field curvature in the sagittal direction, T is a field curvature in the meridian direction. 
     Table 9 shows the various values of the examples 1, 2 and the values corresponding with the parameters which are already specified in the condition expressions. 
     As shown in Table 9, the first embodiment satisfies the various conditions. 
     In this embodiment, the pupil entering diameter of the camera optical lens is 2 mm, the full vision field image height is 2.93 mm, the vision field angle in the diagonal direction is 76.14°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics. 
     Embodiment 2 
     Embodiment 2 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described. 
     Table 5 and table 6 show the design data of the camera optical lens  20  in embodiment 2 of the present invention. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 5 
               
               
                   
                   
               
               
                   
                 R 
                 d 
                 nd 
                 νd 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 S1 
                 ∞ 
                 d0= 
                 −0.300 
                   
                   
                   
                   
               
               
                 R1 
                 1.787 
                 d1= 
                 0.499 
                 nd1 
                 1.5440 
                 ν1 
                 56.10 
               
               
                 R2 
                 4.520 
                 d2= 
                 0.030 
               
               
                 R3 
                 1.639 
                 d3= 
                 0.272 
                 nd2 
                 1.6600 
                 ν2 
                 20.41 
               
               
                 R4 
                 1.372 
                 d4= 
                 0.443 
               
               
                 R5 
                 18.218 
                 d5= 
                 0.563 
                 nd3 
                 1.5440 
                 ν3 
                 56.10 
               
               
                 R6 
                 −8.447 
                 d6= 
                 0.082 
               
               
                 R7 
                 7.530 
                 d7= 
                 0.230 
                 nd4 
                 1.9100 
                 ν4 
                 23.00 
               
               
                 R8 
                 4.703 
                 d8= 
                 0.076 
               
               
                 R9 
                 19.890 
                 d9= 
                 0.200 
                 nd5 
                 1.8500 
                 ν5 
                 21.40 
               
               
                 R10 
                 −601.005 
                 d10= 
                 0.242 
               
               
                 R11 
                 2.805 
                 d11= 
                 0.427 
                 nd6 
                 1.5440 
                 ν6 
                 56.10 
               
               
                 R12 
                 −8.961 
                 d12= 
                 0.557 
               
               
                 R13 
                 −5.80972 
                 d13= 
                 0.260 
                 nd7 
                 1.5350 
                 νg 
                 56.10 
               
               
                 R14 
                 1.817819 
                 d14= 
                 0.175 
               
               
                 R15 
                 ∞ 
                 d15= 
                 0.210 
                 ndg 
                 1.5160 
                 νg 
                 64.16 
               
               
                 R16 
                 ∞ 
                 d16= 
                 0.393 
               
               
                   
               
            
           
         
       
     
     Table 6 shows the aspherical surface data of each lens of the camera optical lens  20  in embodiment 2 of the present invention. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 6 
               
             
            
               
                   
                   
               
               
                   
                 Conic Index 
                 Aspherical Surface Index 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 k 
                 A4 
                 A6 
                 A8 
                 A10 
                 A12 
                 A14 
                 A16 
               
               
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 R1 
                 −8.1608E−01 
                  2.1737E−02 
                 −2.1840E−02  
                  3.7420E−02 
                 −4.1953E−02  
                  1.3434E−02 
                 1.1882E−02 
                 −9.8503E−03 
               
               
                 R2 
                 −8.2914E+00 
                 −6.2634E−01 
                 2.2574E+00 
                 −5.1370E+00 
                 7.5050E+00 
                 −6.7691E+00 
                 3.4130E+00 
                 −7.3708E−01 
               
               
                 R3 
                 −2.4530E+00 
                 −6.1430E−01 
                 1.9911E+00 
                 −4.2986E+00 
                 6.2146E+00 
                 −5.6373E+00 
                 2.8826E+00 
                 −6.3495E−01 
               
               
                 R4 
                 −1.0787E−01 
                 −1.7950E−01 
                 2.4516E−01 
                 −3.6519E−01 
                 6.5972E−01 
                 −8.8129E−01 
                 6.5573E−01 
                 −2.0084E−01 
               
               
                 R5 
                  3.9197E+01 
                 −5.5312E−02 
                 1.4402E−01 
                 −8.8512E−01 
                 2.1415E+00 
                 −2.9546E+00 
                 2.1260E+00 
                 −6.3329E−01 
               
               
                 R6 
                  5.3364E+01 
                 −3.0377E−01 
                 7.3757E−01 
                 −1.6098E+00 
                 2.0332E+00 
                 −1.5779E+00 
                 7.0985E−01 
                 −1.4494E−01 
               
               
                 R7 
                  1.5458E+01 
                 −4.2167E−01 
                 8.2304E−01 
                 −1.1946E+00 
                 1.0886E+00 
                 −5.7553E−01 
                 1.6615E−01 
                 −2.0584E−02 
               
               
                 R8 
                 −5.3588E+01 
                 −2.2286E−01 
                 3.9554E−01 
                 −7.6202E−01 
                 8.8825E−01 
                 −5.8369E−01 
                 2.0389E−01 
                 −2.9069E−02 
               
               
                 R9 
                  3.2997E+01 
                  4.7196E−02 
                 2.2134E−02 
                 −3.8098E−01 
                 5.6059E−01 
                 −3.7875E−01 
                 1.2456E−01 
                 −1.5902E−02 
               
               
                 R10 
                  0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
               
               
                 R11 
                 −4.7933E−01 
                 −2.0231E−03 
                 −2.0770E−01  
                  1.5623E−01 
                 −1.3353E−02  
                 −3.5368E−02 
                 1.5310E−02 
                 −1.9555E−03 
               
               
                 R12 
                  1.0659E+01 
                  2.0528E−01 
                 −3.3494E−01  
                  1.8659E−01 
                 −1.8783E−02  
                 −2.3086E−02 
                 9.0763E−03 
                 −1.0065E−03 
               
               
                 R13 
                  5.4508E+00 
                 −2.0301E−01 
                 −2.0478E−02  
                  6.5180E−02 
                 −2.1155E−02  
                  2.6141E−03 
                 −9.4894E−05  
                 −2.4885E−06 
               
               
                 R14 
                 −6.4639E+00 
                 −1.8630E−01 
                 8.6098E−02 
                 −2.6116E−02 
                 5.1353E−03 
                 −6.2899E−04 
                 4.0585E−05 
                 −1.0307E−06 
               
               
                   
               
            
           
         
       
     
     Table 7 and table 8 show the inflexion points and the arrest point design data of the camera optical lens  20  lens in embodiment 2 of the present invention. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 7 
               
               
                   
                   
               
               
                   
                 Inflexion 
                 Inflexion 
                 Inflexion 
                 Inflexion 
               
               
                   
                 point 
                 point 
                 point 
                 point 
               
               
                   
                 number 
                 position 1 
                 position 2 
                 position 3 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 R1 
                 0 
                   
                   
                   
               
               
                   
                 R2 
                 3 
                 0.215 
                 0.665 
                 0.745 
               
               
                   
                 R3 
                 1 
                 0.965 
               
               
                   
                 R4 
                 0 
               
               
                   
                 R5 
                 1 
                 0.315 
               
               
                   
                 R6 
                 0 
               
               
                   
                 R7 
                 2 
                 0.185 
                 0.955 
               
               
                   
                 R8 
                 2 
                 0.295 
                 1.095 
               
               
                   
                 R9 
                 2 
                 0.565 
                 1.295 
               
               
                   
                 R10 
                 0 
               
               
                   
                 R11 
                 1 
                 0.565 
               
               
                   
                 R12 
                 2 
                 0.245 
                 0.535 
               
               
                   
                 R13 
                 1 
                 1.265 
               
               
                   
                 R14 
                 1 
                 0.455 
               
               
                   
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 8 
               
               
                   
                   
               
               
                   
                 Arrest point 
                 Arrest point 
                 Arrest point 
               
               
                   
                 number 
                 position 1 
                 position 2 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 R1 
                 0 
                   
                   
               
               
                   
                 R2 
                 1 
                 0.855 
               
               
                   
                 R3 
                 0 
               
               
                   
                 R4 
                 0 
               
               
                   
                 R5 
                 1 
                 0.495 
               
               
                   
                 R6 
                 0 
               
               
                   
                 R7 
                 2 
                 0.325 
                 1.195 
               
               
                   
                 R8 
                 2 
                 0.545 
                 1.285 
               
               
                   
                 R9 
                 1 
                 0.775 
               
               
                   
                 R10 
                 0 
               
               
                   
                 R11 
                 1 
                 0.985 
               
               
                   
                 R12 
                 0 
               
               
                   
                 R13 
                 0 
               
               
                   
                 R14 
                 1 
                 0.905 
               
               
                   
                   
               
            
           
         
       
     
       FIG. 6  and  FIG. 7  show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens  20  in the second embodiment.  FIG. 8  shows the field curvature and distortion schematic diagrams after light with a wavelength of 470 nm passes the camera optical lens  20  in the second embodiment. 
     As shown in Table 9, the second embodiment satisfies the various condition expressions. 
     In this embodiment, the pupil entering diameter of the camera optical lens is 2.04 mm, the full vision field image height is 2.934 mm, the vision field o 10  angle in the diagonal direction is 75.94°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 9 
               
               
                   
                   
               
               
                   
                 Embodiment 1 
                 Embodiment 2 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                   
                 f 
                 3.671 
                 3.685 
               
               
                   
                 f1 
                 5.066 
                 5.087 
               
               
                   
                 f2 
                 −25.780 
                 −21.220 
               
               
                   
                 f3 
                 11.444 
                 10.655 
               
               
                   
                 f4 
                 −5.722 
                 −14.250 
               
               
                   
                 f5 
                 6.264 
                 22.573 
               
               
                   
                 f6 
                 3.691 
                 3.966 
               
               
                   
                 f7 
                 −2.419 
                 −2.548 
               
               
                   
                 f3/f4 
                 −2.000 
                 −0.748 
               
               
                   
                 (R1 + R2)/(R1 − R2) 
                 −2.470 
                 −2.307 
               
               
                   
                 (R3 + R4)/(R3 − R4) 
                 13.645 
                 11.258 
               
               
                   
                 (R5 + R6)/(R5 − R6) 
                 0.304 
                 0.366 
               
               
                   
                 (R7 + R8)/(R7 − R8) 
                 2.188 
                 4.326 
               
               
                   
                 (R9 + R10)/(R9 − R10) 
                 −0.982 
                 −0.936 
               
               
                   
                 (R11 + R12)/(R11 − R12) 
                 0.045 
                 −0.523 
               
               
                   
                 (R13 + R14)/(R13 − R14) 
                 0.510 
                 0.523 
               
               
                   
                 f1/f 
                 1.380 
                 1.380 
               
               
                   
                 f2/f 
                 −7.023 
                 −5.758 
               
               
                   
                 f3/f 
                 3.117 
                 2.891 
               
               
                   
                 f4/f 
                 −1.559 
                 −3.867 
               
               
                   
                 f5/f 
                 1.706 
                 6.126 
               
               
                   
                 f6/f 
                 1.005 
                 1.076 
               
               
                   
                 f7/f 
                 −0.659 
                 −0.691 
               
               
                   
                 d1 
                 0.518 
                 0.499 
               
               
                   
                 d3 
                 0.225 
                 0.272 
               
               
                   
                 d5 
                 0.557 
                 0.563 
               
               
                   
                 d7 
                 0.230 
                 0.230 
               
               
                   
                 d9 
                 0.200 
                 0.200 
               
               
                   
                 d11 
                 0.450 
                 0.427 
               
               
                   
                 d13 
                 0.274 
                 0.260 
               
               
                   
                 Fno 
                 1.836 
                 1.806 
               
               
                   
                 TTL 
                 4.600 
                 4.658 
               
               
                   
                 d7/TTL 
                 0.050 
                 0.049 
               
               
                   
                 n1 
                 1.5440 
                 1.5440 
               
               
                   
                 n2 
                 1.6600 
                 1.6600 
               
               
                   
                 n3 
                 1.5440 
                 1.5440 
               
               
                   
                 n4 
                 1.7000 
                 1.9100 
               
               
                   
                 n5 
                 1.8500 
                 1.8500 
               
               
                   
                 n6 
                 1.5440 
                 1.5440 
               
               
                   
                 n7 
                 1.5350 
                 1.5350 
               
               
                   
                   
               
            
           
         
       
     
     It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.