Patent Publication Number: US-11662554-B2

Title: Camera optical lens

Description:
TECHNICAL FIELD 
     The present invention relates to the field of optical lens, and more particularly, to a camera optical lens suitable for handheld terminal devices, such as smart phones or digital cameras, and camera devices, such as monitors or PC lenses. 
     BACKGROUND 
     With the development of imaging lenses, requirements on imaging of the lenses have become increasingly higher. The features of “night scene photography” and “background blurring” of the lenses have also become important indicators for measuring the imaging standards of the lenses. At present, rotationally symmetric aspheric surfaces are commonly used. Such aspheric surfaces only have sufficient degrees of freedom in the meridian plane, and cannot correct off-axis aberrations effectively. In addition, the existing structures have insufficient refractive power distributions, lens spacings and lens shape settings, resulting in insufficient ultra-thin and wide-angle properties of the lenses. Moreover, a rotationally symmetric aspheric surface cannot correct aberrations effectively. A free-form surface is a non-rotationally symmetric surface type, which can better balance aberrations and improve imaging quality. The manufacture of free-form surfaces has gradually matured. As the requirements on the imaging of the lens increase, it is very important to add free-form surfaces when designing the lens, especially in the design of wide-angle and ultra-wide-angle lenses. 
     SUMMARY 
     In view of the problems, the present invention aims to provide a camera optical lens, which can achieve high optical performance while satisfying requirements for ultra-thin and wide-angle lenses. 
     In an embodiment, the present invention provides a camera optical lens. The camera optical lens includes, sequentially from an object side to an image side: a first lens having a negative refractive power; a second lens; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. At least one of the first to seventh lenses comprises a free-form surface. The camera optical lens satisfies following conditions: −5.00≤f 1 /f≤−1.00; and 1.50≤d 1 /d 2 ≤7.00, where f denotes a focal length of the camera optical lens; f 1  denotes a focal length of the first lens; d 1  denotes an on-axis thickness of the first lens; and d 2  denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens. 
     As an improvement, the camera optical lens further satisfies a following condition: 0≤R 3 /R 4 ≤2.00, where R 3  denotes a curvature radius of the object side surface of the second lens; and R 4  denotes a curvature radius of an image side surface of the second lens. 
     As an improvement, the camera optical lens further satisfies a following condition: −4.00≤f 7 /f≤−1.50, where f 7  denotes a focal length of the seventh lens. 
     As an improvement, the camera optical lens further satisfies following conditions: −5.41≤(R 1 +R 2 )/(R 1 −R 2 )≤0.55; and 0.03≤d 1 /TTL≤0.18, where R 1  denotes a curvature radius of an object side surface of the first lens; R 2  denotes a curvature radius of the image side surface of the first lens; and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     As an improvement, the camera optical lens further satisfies following conditions: −12.01≤f 2 /f≤4.72; −4.80≤(R 3 +R 4 )/(R 3 −R 4 )≤5.83; and 0.03≤d 3 /TTL≤0.11, where f 2  denotes a focal length of the second lens; R 3  denotes a curvature radius of the object side surface of the second lens; R 4  denotes a curvature radius of an image side surface of the second lens; d 3  denotes an on-axis thickness of the second lens; and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     As an improvement, the camera optical lens further satisfies following conditions: 0.63≤f 3 /f≤2.21; 0.07≤(R 5 +R 6 )/(R 5 -R 6 )≤0.24; and 0.06≤d 5 /TTL≤0.21, where f 3  denotes a focal length of the third lens; R 5  denotes a curvature radius of an object side surface of the third lens; R 6  denotes a curvature radius of an image side surface of the third lens; d 5  denotes an on-axis thickness of the third lens; and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     As an improvement, the camera optical lens further satisfies following conditions: −7.14≤f 4 /f≤−1.25; 0.29≤(R 7 +R 8 )/(R 7 −R 8 )≤2.28; and 0.02≤d 7 /TTL≤0.07, where f 4  denotes a focal length of the fourth lens; R 7  denotes a curvature radius of an object side surface of the fourth lens; R 8  denotes a curvature radius of an image side surface of the fourth lens; d 7  denotes an on-axis thickness of the fourth lens; and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     As an improvement, the camera optical lens further satisfies following conditions: −216.57≤f 5 /f≤3.80; −21.08≤(R 9 +R 10 )/(R 9 −R 10 )≤2.81; and 0.05≤d 9 /TTL≤0.15, where f 5  denotes a focal length of the fifth lens; R 9  denotes a curvature radius of an object side surface of the fifth lens; R 10  denotes a curvature radius of an image side surface of the fifth lens; d 9  denotes an on-axis thickness of the fifth lens; and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     As an improvement, the camera optical lens further satisfies following conditions: 0.48≤f 6 /f≤2.47; 0.47≤(R 11 +R 12 )/(R 11 −R 12 )≤2.53; and 0.05≤d 11 /TTL≤0.17, where f 6  denotes a focal length of the sixth lens; R 11  denotes a curvature radius of an object side surface of the sixth lens; R 12  denotes a curvature radius of an image side surface of the sixth lens; d 11  denotes an on-axis thickness of the sixth lens; and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     As an improvement, the camera optical lens further satisfies following conditions: 0.96≤(R 13 +R 14 )/(R 13 -R 14 )≤5.19; and 0.03≤d 13 /TTL≤0.24, where R 13  denotes a curvature radius of an object side surface of the seventh lens; R 14  denotes a curvature radius of an image side surface of the seventh lens; d 13  denotes an on-axis thickness of the seventh lens; and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis. 
     The present invention has advantageous effects in that the camera optical lens according to the present invention has excellent optical performance, is ultra-thin, wide-angle and includes, among the first lens to the seventh lens, at least one lens that includes a free-form surface, which can effectively correct aberrations while further improving the performance of the optical system, making it especially suitable for high-pixel camera optical lens assembly of mobile phones and WEB camera optical lenses formed by camera elements such as CCD and CMOS. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present invention. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG.  1    is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 1 of the present invention; 
         FIG.  2    illustrates a case where an RMS spot diameter of the camera optical lens shown in  FIG.  1    is in a first quadrant. 
         FIG.  3    is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 2 of the present invention; 
         FIG.  4    illustrates a case where an RMS spot diameter of the camera optical lens shown in  FIG.  3    is in a first quadrant. 
         FIG.  5    is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 3 of the present invention; 
         FIG.  6    illustrates a case where an RMS spot diameter of the camera optical lens shown in  FIG.  5    is in a first quadrant. 
         FIG.  7    is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 4 of the present invention; and 
         FIG.  8    illustrates a case where an RMS spot diameter of the camera optical lens shown in  FIG.  7    is in a first quadrant. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The present invention 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 invention more apparent, the present invention 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 
     Referring to  FIG.  1   , the present invention provides a camera optical lens  10 .  FIG.  1    shows the camera optical lens  10  according to Embodiment 1 of the present invention. The camera optical lens  10  includes seven lenses. Specifically, the camera optical lens  10  includes, sequentially from an object side to an image side, a first lens L 1 , a second lens L 2 , an aperture S 1 , 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 . An optical element such as a glass filter (GF) can be arranged between the seventh lens L 7  and an image plane Si. 
     In this embodiment, the first lens L 1  is made of a plastic material, the second lens L 2  is made of a plastic material, the third lens L 3  is made of a plastic material, the fourth lens L 4  is made of a plastic material, the fifth lens L 5  is made of a plastic material, the sixth lens L 6  is made of a plastic material, and the seventh lens L 7  is made of a plastic material. 
     A focal length of the camera optical lens  10  is defined as f, and a focal length of the first lens L 1  is defined as f 1 . The camera optical lens  10  should satisfy a condition of −5.00≤f 1 /f≤−1.00, which specifies a ratio of the focal length of the first lens L 1  to the focal length of the camera optical lens  10 . This can effectively balance spherical aberrations and a field curvature of the system. As an example, −4.71≤f 1 /f≤−1.18. 
     An on-axis thickness of the first lens L 1  is defined as d 1 , and an on-axis distance from an image side surface of the first lens L 1  to an object side surface of the second lens L 2  is defined as d 2 . The camera optical lens  10  should satisfy a condition of 1.50≤d 1 /d 2 ≤7.00, which specifies a ratio of the thickness of the first lens to an air space between the first and second lenses. When the condition is satisfied, reduction of the total length can be facilitated, thereby achieving ultra-thin lenses. As an example, 1.51≤d 1 /d 2 ≤6.84. 
     At least one of the first lens L 1  to the seventh lens L 7  includes a free-form surface. This can effectively correct aberrations while further improving the performance of the optical system. 
     A curvature radius of the object side surface of the second lens L 2  is defined as R 3 , and a curvature radius of the image side surface of the second lens L 2  is defined as R 4 . The camera optical lens  10  should satisfy a condition of 0≤R 3 /R 4 ≤2.00, which specifies a shape of the second lens L 2 . When the condition is satisfied, the lens assembly and processing can be facilitated. As an example, 0.21≤R 3 /R 4 ≤1.85. 
     The focal length of the camera optical lens  10  is f, and the focal length of the seventh lens L 7  is P. The camera optical lens  10  further satisfies a condition of −4.00≤f 7 /f≤−1.50, which specifies a ratio of the focal length of the seventh lens to the focal length of the camera optical lens  10 . The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity. As an example, −3.78≤f 7 /f≤−1.56. 
     In this embodiment, the first lens L 1  has a negative refractive power, and includes an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region. 
     A curvature radius of the object side surface of the first lens L 1  is defined as R 1 , and a curvature radius of the image side surface of the first lens L 1  is defined as R 2 . The camera optical lens  10  should satisfy a condition of −5.41≤(R 1 +R 2 )/(R 1 −R 2 )≤0.55. By reasonably controlling a shape of the first lens L 1 , the first lens L 1  can effectively correct spherical aberrations of the system. As an example, −3.38≤(R 1 +R 2 )/(R 1 -R 2 )≤0.44. 
     An on-axis thickness of the first lens L 1  is defined as d 1 , and a total optical length from the object side surface of the first lens L 1  to an image plane of the camera optical lens  10  along an optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.03≤d 1 /TTL≤0.18. This can facilitate achieving ultra-thin lenses. As an example, 0.04≤d 1 /TTL≤0.14. 
     In an embodiment, the second lens L 2  has a negative refractive power, and includes an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region. 
     The focal length of the camera optical lens  10  is f, and a focal length of the second lens L 2  is f 2 . The camera optical lens  10  further satisfies a condition of −12.01≤f 2 /f≤4.72. By controlling the refractive power of the second lens L 2  within the reasonable range, correction of aberrations of the optical system can be facilitated. As an example, −7.50≤f 2 /f≤3.78. 
     A curvature radius of the object side surface of the second lens L 2  is defined as R 3 , and a curvature radius of the image side surface of the second lens L 2  is defined as R 4 . The camera optical lens  10  should satisfy a condition of −4.80≤(R 3 +R 4 )/(R 3 −R 4 )≤5.83, which specifies a shape of the second lens L 2 . This can facilitate correction of an on-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, −3.00≤(R 3 +R 4 )/(R 3 −R 4 )≤4.66. 
     An on-axis thickness of the second lens L 2  is defined as d 3 , and the total optical length from the object side surface of the first lens L 1  to the image plane of the camera optical lens  10  along the optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.03≤d 3 /TTL≤0.11. This can facilitate achieving ultra-thin lenses. As an example, 0.05≤d 3 /TTL≤0.09. 
     In an embodiment, the third lens L 3  has a positive refractive power, and includes an object side surface being convex in the paraxial region and an image side surface being convex in the paraxial region. 
     The focal length of the camera optical lens  10  is f, and a focal length of the third lens L 3  is f 3 . The camera optical lens  10  further satisfies a condition of 0.63≤f 3 /f≤2.21. The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity. As an example, 1.00≤f 3 /f≤1.77. 
     A curvature radius of the object side surface of the third lens L 3  is defined as R 5 , and a curvature radius of the image side surface of the third lens L 3  is defined as R 6 . The camera optical lens  10  should satisfy a condition of 0.07≤(R 5 +R 6 )/(R 5 −R 6 )≤0.24. This specifies a shape of the third lens. When the condition is satisfied, the deflection of light passing through the lens can be alleviated, and aberrations can be effectively reduced. As an example, 0.11≤(R 5 +R 6 )/(R 5 −R 6 )≤0.19. 
     An on-axis thickness of the third lens L 3  is defined as d 5 , and the total optical length from the object side surface of the first lens L 1  to the image plane of the camera optical lens  10  along the optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.06≤d 5 /TTL≤0.21. This can facilitate achieving ultra-thin lenses. As an example, 0.10≤d 5 /TTL≤0.17. 
     In an embodiment, the fourth lens L 4  has a negative refractive power, includes an object side surface being is convex in a paraxial region and an image side surface being concave in the paraxial region. 
     The focal length of the camera optical lens  10  is f, and a focal length of the fourth lens L 4  is f 4 . The camera optical lens  10  further satisfies a condition of −7.14≤f 4 /f≤−1.25, which specifies a ratio of the focal length of the fourth lens L 4  to the focal length of the camera optical lens. This facilitates improving the performance of the optical system. As an example, −4.46≤f 4 /f≤−1.56. 
     A curvature radius of the object side surface of the fourth lens L 4  is defined as R 7 , and a curvature radius of the image side surface of the fourth lens L 4  is defined as R 8 . The camera optical lens  10  should satisfy a condition of 0.29≤(R 7 +R 8 )/(R 7 −R 8 )≤2.28, which specifies a shape of the fourth lens L 4 . This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 0.47≤(R 7 +R 8 )/(R 7 −R 8 )≤1.82. 
     An on-axis thickness of the fourth lens L 4  is defined as d 7 , and the total optical length from the object side surface of the first lens L 1  to the image plane of the camera optical lens  10  along the optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.02≤d 7 /TTL≤0.07. This can facilitate achieving ultra-thin lenses. As an example, 0.03≤d 7 /TTL≤0.06. 
     In an embodiment, the fifth lens L 5  has a negative refractive power, and includes an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region. 
     The focal length of the camera optical lens  10  is f, and the focal length of the fifth lens L 5  is f 5 . The camera optical lens  10  further satisfies a condition of −216.57≤f 5 /f≤3.80. This condition for the fifth lens L 5  can effectively make a light angle of the camera optical lens  10  gentle and reduce the tolerance sensitivity. As an example, −135.36≤f 5 /f≤3.04. 
     A curvature radius of the object side surface of the fifth lens L 5  is defined as R 9 , and a curvature radius of the image side surface of the fifth lens L 5  is defined as R 10 . The camera optical lens  10  should satisfy a condition of −21.08≤(R 9 +R 10 )/(R 9 −R 10 )≤2.81, which specifies a shape of the fifth lens L 5 . This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, −13.18≤(R 9 +R 10 )/(R 9 −R 10 )≤2.25. 
     An on-axis thickness of the fifth lens L 5  is defined as d 9 , and the total optical length from the object side surface of the first lens L 1  to the image plane of the camera optical lens  10  along the optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.05≤d 9 /TTL≤0.15. This can facilitate achieving ultra-thin lenses. As an example, 0.07≤d 9 /TTL≤0.12. 
     In an embodiment, the sixth lens L 6  has a positive refractive power, and includes an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region. 
     The focal length of the camera optical lens  10  is f, and the focal length of the sixth lens L 6  is f 6 . The camera optical lens  10  further satisfies a condition of 0.48≤f 6 /f≤2.47. The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity. As an example, 0.76≤f 6 /f≤1.97. 
     A curvature radius of the object side surface of the sixth lens L 6  is defined as R 11 , and a curvature radius of the image side surface of the sixth lens L 6  is defined as R 12 . The camera optical lens  10  should satisfy a condition of 0.47≤(R 11 +R 12 )/(R 11 −R 12 )≤2.53, which specifies a shape of the sixth lens L 6 . This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 0.75≤(R 11 +R 12 )/(R 11 −R 12 )≤2.03. 
     An on-axis thickness of the sixth lens L 6  is defined as d 11 , and the total optical length from the object side surface of the first lens L 1  to the image plane of the camera optical lens  10  along the optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.05≤d 11 /TTL≤0.17. This can facilitate achieving ultra-thin lenses. As an example, 0.07≤d 11 /TTL≤0.13. 
     In an embodiment, the seventh lens L 7  has a negative refractive power, and includes an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region. 
     A curvature radius of the object side surface of the seventh lens L 7  is defined as R 13 , and a curvature radius of the image side surface of the seventh lens L 7  is defined as R 14 . The camera optical lens  10  further satisfies a condition of 0.96≤(R 13 +R 14 )/(R 13 −R 14 )≤5.19, which specifies a shape of the seventh lens L 7 . This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 1.53≤(R 13 +R 14 )/(R 13 −R 14 )≤4.15. 
     An on-axis thickness of the seventh lens L 7  is defined as d 13 , and the total optical length from the object side surface of the first lens L 1  to the image plane of the camera optical lens  10  along the optic axis is defined as TTL. The camera optical lens  10  should satisfy a condition of 0.03≤d 13 /TTL≤0.24. This can facilitate achieving ultra-thin lenses. As an example, 0.05≤d 13 /TTL≤0.20. 
     In this embodiment, an F number of the camera optical lens  10  is smaller than or equal to 2.06. The camera optical lens  10  has a large aperture and better imaging performance. As an example, the F number of the camera optical lens  10  is smaller than or equal to 2.02. 
     In this embodiment, the total optical length TTL of the camera optical lens  10  is smaller than or equal to 6.71 mm, which is beneficial for achieving ultra-thin lenses. As an example, the total optical length TTL of the camera optical lens  10  is smaller than or equal to 6.40 mm. 
     When the above conditions are satisfied, the camera optical lens  10  will have high optical imaging performance, and at the same time, with the free-form surface, achieve matching between a designed image side surface region and an actually used region, which can improve image quality of the effective region to the maximum extent. With these characteristics, the camera optical lens  10  is especially suitable for high-pixel camera optical lens assembly of mobile phones and WEB camera optical lenses formed by imaging elements such as CCD and CMOS. 
     In the following, examples will be used to describe the camera optical lens  10  of the present invention. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, and curvature radius are all in units of mm. 
     TTL: Optical length (the total optical length from the object side surface of the first lens L 1  to the image plane Si of the camera optical lens along the optic axis) in mm. 
     F number (FNO): a ratio of an effective focal length of the camera optical lens to an entrance pupil diameter (ENPD) of the camera optical lens. 
     Table 1 and Table 2 show design data of the camera optical lens  10  according to Embodiment 1 of the present invention, in which the object side surface and the image side surface of the sixth lens L 6  are each a free-form surface. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                 R 
                 d 
                 nd 
                 νd 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 S1 
                 ∞ 
                 d0= 
                 −1.848 
                   
                   
                   
                   
               
               
                 R1 
                 −2.071 
                 d1= 
                 0.712 
                 nd1 
                 1.5444 
                 ν1 
                 56.43 
               
               
                 R2 
                 −4.499 
                 d2= 
                 0.139 
                   
                   
                   
                   
               
               
                 R3 
                 4.579 
                 d3= 
                 0.433 
                 nd2 
                 1.6800 
                 ν2 
                 18.40 
               
               
                 R4 
                 2.705 
                 d4= 
                 0.516 
                   
                   
                   
                   
               
               
                 R5 
                 2.758 
                 d5= 
                 0.797 
                 nd3 
                 1.5444 
                 ν3 
                 56.43 
               
               
                 R6 
                 −2.075 
                 d6= 
                 0.231 
                   
                   
                   
                   
               
               
                 R7 
                 16.567 
                 d7= 
                 0.240 
                 nd4 
                 1.6800 
                 ν4 
                 18.40 
               
               
                 R8 
                 3.418 
                 d8= 
                 0.087 
                   
                   
                   
                   
               
               
                 R9 
                 −17.075 
                 d9= 
                 0.594 
                 nd5 
                 1.5444 
                 ν5 
                 56.43 
               
               
                 R10 
                 −20.654 
                 d10= 
                 0.112 
                   
                   
                   
                   
               
               
                 R11 
                 −299.953 
                 d11= 
                 0.569 
                 nd6 
                 1.5444 
                 ν6 
                 56.43 
               
               
                 R12 
                 −0.932 
                 d12= 
                 0.040 
                   
                   
                   
                   
               
               
                 R13 
                 1.136 
                 d13= 
                 0.375 
                 nd7 
                 1.6153 
                 ν7 
                 26.00 
               
               
                 R14 
                 0.605 
                 d14= 
                 0.600 
                   
                   
                   
                   
               
               
                 R15 
                 ∞ 
                 d15= 
                 0.210 
                 ndg 
                 1.5168 
                 νg 
                 64.17 
               
               
                 R16 
                 ∞ 
                 d16= 
                 0.444 
               
               
                   
               
            
           
         
       
     
     In the table, meanings of various symbols will be described as follows. 
     S 1 : aperture; 
     R: central curvature radius of an optical surface; 
     R 1 : curvature radius of the object side surface of the first lens L 1 ; 
     R 2 : curvature radius of the image side surface of the first lens L 1 ; 
     R 3 : curvature radius of the object side surface of the second lens L 2 ; 
     R 4 : curvature radius of the image side surface of the second lens L 2 ; 
     R 5 : curvature radius of the object side surface of the third lens L 3 ; 
     R 6 : curvature radius of the image side surface of the third lens L 3 ; 
     R 7 : curvature radius of the object side surface of the fourth lens L 4 ; 
     R 8 : curvature radius of the image side surface of the fourth lens L 4 ; 
     R 9 : curvature radius of the object side surface of the fifth lens L 5 ; 
     R 10 : curvature radius of the image side surface of the fifth lens L 5 ; 
     R 11 : curvature radius of the object side surface of the sixth lens L 6 ; 
     R 12 : curvature radius of the image side surface of the sixth lens L 6 ; 
     R 13 : curvature radius of the object side surface of the seventh lens L 7 ; 
     R 14 : curvature radius of the image side surface of the seventh lens L 7 ; 
     R 15 : curvature radius of an object side surface of the optical filter GF; 
     R 16 : curvature radius of an image side surface of the optical filter GF; 
     d: on-axis thickness of a lens and an on-axis distance between lenses; 
     d 0 : on-axis distance from the aperture S 1  to the object side surface of the first lens L 1 ; 
     d 1 : on-axis thickness of the first lens L 1 ; 
     d 2 : on-axis distance from the image side surface of the first lens L 1  to the object side surface of the second lens L 2 ; 
     d 3 : on-axis thickness of the second lens L 2 ; 
     d 4 : on-axis distance from the image side surface of the second lens L 2  to the object side surface of the third lens L 3 ; 
     d 5 : on-axis thickness of the third lens L 3 ; 
     d 6 : on-axis distance from the image side surface of the third lens L 3  to the object side surface of the fourth lens L 4 ; 
     d 7 : on-axis thickness of the fourth lens L 4 ; 
     d 8 : on-axis distance from the image side surface of the fourth lens L 4  to the object side surface of the fifth lens L 5 ; 
     d 9 : on-axis thickness of the fifth lens L 5 ; 
     d 10 : on-axis distance from the image side surface of the fifth lens L 5  to the object side surface of the sixth lens L 6 ; 
     d 11 : on-axis thickness of the sixth lens L 6 ; 
     d 12 : on-axis distance from the image side surface of the sixth lens L 6  to the object side surface of the seventh lens L 7 ; 
     d 13 : on-axis thickness of the seventh lens L 7 ; 
     d 14 : on-axis distance from the image side surface of the seventh lens L 7  to the object side surface of the optical filter GF; 
     d 15 : on-axis thickness of the optical filter GF; 
     d 16 : on-axis distance from the image side surface of the optical filter GF to the image plane; 
     nd: refractive index of d line; 
     nd 1 : refractive index of d line of the first lens L 1 ; 
     nd 2 : refractive index of d line of the second lens L 2 ; 
     nd 3 : refractive index of d line of the third lens L 3 ; 
     nd 4 : refractive index of d line of the fourth lens L 4 ; 
     nd 5 : refractive index of d line of the fifth lens L 5 ; 
     nd 6 : refractive index of d line of the sixth lens L 6 ; 
     nd 7 : refractive index of d line of the seventh lens L 7 ; 
     ndg: refractive index of d line of the optical filter GF; 
     vd: abbe number; 
     v 1 : abbe number of the first lens L 1 ; 
     v 2 : abbe number of the second lens L 2 ; 
     v 3 : abbe number of the third lens L 3 ; 
     v 4 : abbe number of the fourth lens L 4 ; 
     v 5 : abbe number of the fifth lens L 5 ; 
     v 6 : abbe number of the sixth lens L 6 ; 
     v 7 : abbe number of the seventh lens L 7 ; 
     vg: abbe number of the optical filter GF. 
     Table 2 shows aspheric surface data of respective lens in the camera optical lens  10  according to Embodiment 1 of the present invention. 
                             TABLE 2                      Conic coefficient   Aspherical surface coefficients                                             k   A4   A6   A8   A10   A12               R1   −1.8339E+01   9.5091E−02   −5.7882E−02   2.5208E−02   −7.4051E−03   1.4476E−03       R2    2.6255E−01   8.9631E−01   −1.9363E+00   4.4128E+00   −8.1217E+00   1.0447E+01       R3    9.9930E+00   6.0024E−01   −1.8856E+00   6.0340E+00   −1.4769E+01   2.5073E+01       R4   −1.4620E+00   2.1430E−01   −1.3374E−01   3.5196E−01    1.0877E+00   −5.7704E+00        R5   −5.4802E+00   6.3985E−02   −3.2584E−03   −5.8965E−02     0.0000E+00   0.0000E+00       R6    2.7697E+00   −9.0993E−02     1.8720E−01   −2.5171E−01     1.6500E−01   −4.4213E−02        R7    1.0000E+01   −4.5683E−01     6.2283E−01   −1.5486E+00     4.1735E+00   −9.6470E+00        R8   −9.9955E+00   −2.8523E−01     1.7508E−01   5.5108E−01   −1.7117E+00   2.2179E+00       R9    1.0000E+01   2.8129E−02   −4.9701E−01   1.8527E+00   −3.3257E+00   3.1967E+00       R10   −4.6489E+00   8.0738E−02   −7.3952E−01   1.4500E+00   −2.1646E+00   2.2893E+00       R13   −1.9726E+00   −3.8614E−01     2.8044E−01   −1.4958E−01     5.1453E−02   −6.2106E−03        R14   −3.2191E+00   −1.6994E−01     1.1434E−01   −5.9479E−02     2.1946E−02   −5.4045E−03                                      Conic coefficient   Aspherical surface coefficients                                         k   A14   A16   A18   A20               R1   −1.8339E+01   −1.7891E−04   1.2545E−05   −3.7738E−07   0.0000E+00       R2    2.6255E−01   −8.7993E+00   4.5953E+00   −1.3389E+00   1.6482E−01       R3    9.9930E+00   −2.7941E+01   1.9364E+01   −7.5085E+00   1.2323E+00       R4   −1.4620E+00    1.1047E+01   −9.3633E+00     2.8691E+00   0.0000E+00       R5   −5.4802E+00    0.0000E+00   0.0000E+00    0.0000E+00   0.0000E+00       R6    2.7697E+00    0.0000E+00   0.0000E+00    0.0000E+00   0.0000E+00       R7    1.0000E+01    1.5679E+01   −1.6572E+01     1.0071E+01   −2.6024E+00        R8   −9.9955E+00   −1.5460E+00   5.6919E−01   −8.6946E−02   0.0000E+00       R9    1.0000E+01   −1.5127E+00   1.5720E−01    1.3470E−01   −3.9295E−02        R10   −4.6489E+00   −1.5772E+00   6.5722E−01   −1.4506E−01   1.2405E−02       R13   −1.9726E+00   −2.6622E−03   1.1972E−03   −1.7914E−04   9.4688E−06       R14   −3.2191E+00    8.2152E−04   −6.7804E−05     2.0477E−06   3.2406E−08                      z =( cr   2 )/[1+{1−( k+ 1)( c   2   r   2 )} 1/2 ]+ A 4 r   4   +A 6 r   6   +A 8 r   8   +A 10 r   10   +A 12 r   12   +A 14 r   14   +A 16 r   16   +A 18 r   18   +A 20 r   20   (1),
 
     where k is a conic coefficient, A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18  and A 20  are aspheric surface coefficients, c denotes a central curvature radius of an optical surface, r denotes a normal distance between a point on an aspheric surface curve to the optic axis, and z denotes a depth of the aspheric surface (a normal distance between a point on the aspherical surface, having a distance of r from the optic axis, and a surface tangent to a vertex of the aspherical surface on the optic axis). 
     In the present embodiment, an 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 polynomial form shown in the condition (1). 
     Table 3 shows data of free-form surfaces of the camera optical lens  10  according to Embodiment 1 of the present invention. 
     
       
         
           
               
               
             
               
                 TABLE 3 
               
               
                   
               
             
            
               
                   
                 Free-form surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 k 
                 X 4 Y 0   
                 X 2 Y 2   
                 X 0 Y 4   
                 X 6 Y 0   
                 X 4 Y 2   
                 X 2 Y 4   
                 X 0 Y 6   
               
               
                   
               
               
                 R11 
                 1.0000E+01 
                 3.2484E−01 
                 6.4831E−01 
                 3.2374E−01 
                 −9.2282E−01 
                 −2.7666E+00 
                 −2.7654E+00 
                 −9.2136E−01 
               
               
                 R12 
                 −7.5439E−01  
                 4.9995E−01 
                 9.9866E−01 
                 4.9895E−01 
                 −7.4701E−01 
                 −2.2398E+00 
                 −2.2395E+00 
                 −7.4614E−01 
               
               
                   
               
               
                   
                 X 4 Y 6   
                 X 2 Y 8   
                 X 0 Y 10   
                 X 12 Y 0   
                 X 10 Y 2   
                 X 8 Y 4   
                 X 6 Y 6   
                 X 4 Y 8   
               
               
                   
               
               
                 R11 
                 −2.0725E+01  
                 −1.0364E+01  
                 −2.0733E+00  
                 1.7603E+00 
                  1.0562E+01 
                  2.6407E+01 
                  3.5210E+01 
                  2.6409E+01 
               
               
                 R12 
                 −1.4527E+01  
                 −7.2656E+00  
                 −1.4532E+00  
                 1.0095E+00 
                  6.0579E+00 
                  1.5144E+01 
                  2.0192E+01 
                  1.5146E+01 
               
               
                   
               
               
                   
                 X 2 Y 12   
                 X 0 Y 14   
                 X 16 Y 0   
                 X 14 Y 2   
                 X 12 Y 4   
                 X 10 Y 6   
                 X 8 Y 8   
                 X 6 Y 10   
               
               
                   
               
               
                 R11 
                 −6.9058E+00  
                 −9.8634E−01  
                 3.4402E−01 
                 2.7517E+00 
                  9.6319E+00 
                  1.9263E+01 
                  2.4078E+01 
                  1.9261E+01 
               
               
                 R12 
                 −3.2078E+00  
                 −4.5815E−01  
                 1.3249E−01 
                 1.0596E+00 
                  3.7090E+00 
                  7.4182E+00 
                  9.2721E+00 
                  7.4178E+00 
               
               
                   
               
               
                   
                 X 8 Y 10   
                 X 6 Y 12   
                 X 4 Y 14   
                 X 2 Y 16   
                 X 0 Y 18   
                 X 20 Y 0   
                 X 18 Y 2   
                 X 16 Y 4   
               
               
                   
               
               
                 R11 
                 −8.4018E+00  
                 −5.6032E+00  
                 −2.3990E+00  
                 −5.9957E−01  
                 −6.6855E−02 
                  5.4366E−03 
                  5.4536E−02 
                  2.4489E−01 
               
               
                 R12 
                 −2.7691E+00  
                 −1.8455E+00  
                 −7.9161E−01  
                 −1.9758E−01  
                 −2.1981E−02 
                  1.5760E−03 
                  1.5832E−02 
                  7.1110E−02 
               
               
                   
               
               
                   
                 X 8 Y 0   
                 X 6 Y 2   
                 X 4 Y 4   
                 X 2 Y 6   
                 X 0 Y 8   
                 X 10 Y 0   
                 X 8 Y 2   
                 X 6 Y 4   
               
               
                   
               
               
                 R11 
                 1.6504E+00 
                 6.5975E+00 
                 9.8993E+00 
                 6.5961E+00 
                  1.6492E+00 
                 −2.0731E+00 
                 −1.0361E+01 
                 −2.0734E+01 
               
               
                 R12 
                 1.3198E+00 
                 5.2776E+00 
                 7.9167E+00 
                 5.2778E+00 
                  1.3193E+00 
                 −1.4530E+00 
                 −7.2641E+00 
                 −1.4532E+01 
               
               
                   
               
               
                   
                 X 2 Y 10   
                 X 0 Y 12   
                 X 14 Y 0   
                 X 12 Y 2   
                 X 10 Y 4   
                 X 8 Y 6   
                 X 6 Y 8   
                 X 4 Y 10   
               
               
                   
               
               
                 R11 
                 1.0563E+01 
                 1.7608E+00 
                 −9.8642E−01  
                 −6.9061E+00  
                 −2.0716E+01 
                 −3.4528E+01 
                 −3.4524E+01 
                 −2.0717E+01 
               
               
                 R12 
                 6.0571E+00 
                 1.0098E+00 
                 −4.5827E−01  
                 −3.2082E+00  
                 −9.6237E+00 
                 −1.6039E+01 
                 −1.6040E+01 
                 −9.6249E+00 
               
               
                   
               
               
                   
                 X 4 Y 12   
                 X 2 Y 14   
                 X 0 Y 16   
                 X 18 Y 0   
                 X 16 Y 2   
                 X 14 Y 4   
                 X 12 Y 6   
                 X 10 Y 8   
               
               
                   
               
               
                 R11 
                 9.6282E+00 
                 2.7520E+00 
                 3.4401E−01 
                 −6.6671E−02  
                 −5.9998E−01 
                 −2.4002E+00 
                 −5.5997E+00 
                 −8.3998E+00 
               
               
                 R12 
                 3.7079E+00 
                 1.0602E+00 
                 1.3234E−01 
                 −2.1971E−02  
                 −1.9779E−01 
                 −7.9110E−01 
                 −1.8461E+00 
                 −2.7696E+00 
               
               
                   
               
               
                   
                 X 14 Y 6   
                 X 12 Y 8   
                 X 10 Y 10   
                 X 8 Y 12   
                 X 6 Y 14   
                 X 4 Y 16   
                 X 2 Y 18   
                 X 0 Y 20   
               
               
                   
               
               
                 R11 
                 6.5366E−01 
                 1.1424E+00 
                 1.3727E+00 
                 1.1448E+00 
                  6.5604E−01 
                  2.4450E−01 
                  5.4372E−02 
                  5.4926E−03 
               
               
                 R12 
                 1.8962E−01 
                 3.3229E−01 
                 3.9832E−01 
                 3.3201E−01 
                  1.8990E−01 
                  7.1342E−02 
                  1.5657E−02 
                  1.5897E−03 
               
               
                   
               
            
           
         
       
     
     
       
         
           
             
               
                 
                   
                     Z 
                     = 
                     
                       
                         
                           c 
                           ⁢ 
                           
                             r 
                             2 
                           
                         
                         
                           1 
                           + 
                           
                             
                               1 
                               - 
                               
                                 
                                   ( 
                                   
                                     1 
                                     + 
                                     k 
                                   
                                   ) 
                                 
                                 ⁢ 
                                 
                                   c 
                                   2 
                                 
                                 ⁢ 
                                 
                                   r 
                                   2 
                                 
                               
                             
                           
                         
                       
                       + 
                       
                         
                           ∑ 
                           
                             i 
                             = 
                             1 
                           
                           N 
                         
                         ⁢ 
                         
                           
                             B 
                             i 
                           
                           ⁢ 
                           
                             
                               E 
                               i 
                             
                             ⁡ 
                             
                               ( 
                               
                                 x 
                                 , 
                                 y 
                               
                               ) 
                             
                           
                         
                       
                     
                   
                   , 
                 
               
               
                 
                   ( 
                   2 
                   ) 
                 
               
             
           
         
       
     
     where k is a conic coefficient, Bi denotes aspheric surface coefficients, c denotes a central curvature radius of an optical surface, r denotes a normal distance between a point on an aspheric surface curve to the optic axis, x denotes a x direction component of r, y denotes a y direction component of r, and z denotes a depth of the aspheric surface (a normal distance between a point on the aspherical surface, having a distance of r from the optic axis, and a surface tangent to a vertex of the aspherical surface on the optic axis). 
     For sake of explanation, each free-form surface adopts an extended polynomial form indicated in the above equation (2), however, the present invention is not limited thereto. 
       FIG.  2    illustrates a case where an RMS spot diameter of the camera optical lens  10  according to Embodiment 1 is in a first quadrant. It can be seen from  FIG.  2    that the camera optical lens  10  according to Embodiment 1 can achieve excellent imaging quality. 
     Table 13 below lists various values of Embodiments 1, 2, 3 and 4 and values corresponding to parameters which are specified in the above conditions. 
     As shown in Table 13, Embodiment 1 satisfies the respective conditions. 
     In this embodiment, the entrance pupil diameter of the camera optical lens is 0.908 mm. A full-field image height of the camera optical lens (along a diagonal direction) is 6.000 mm, an image height along the x direction of the camera optical lens is 4.800 mm, and an image height along the y direction of the camera optical lens is 3.600 mm. In such rectangular range, the best imaging effect can be achieved. A FOV (field of view) along a diagonal direction is 120.00°, a FOV along the x direction is 107.38°, and a FOV along the y direction is 90.58°. Thus, the camera optical lens  10  can satisfy design requirements for ultra-thin, wide-angle lenses while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics. 
     Embodiment 2 
     Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment, and only differences from Embodiment 1 will be described below. 
       FIG.  3    is a schematic diagram of a structure of a camera optical lens  20  in accordance with Embodiment 2 of the present invention. In this embodiment, the object side surface of the sixth lens L 6  is convex in the paraxial region. 
     Table 4 and Table 5 show design data of the camera optical lens  20  according to Embodiment 2 of the present invention, in which the object side surface and the image side surface of the first lens L 1  are each a free-form surface. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 4 
               
               
                   
               
               
                   
                 R 
                 d 
                 nd 
                 νd 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 S1 
                 ∞ 
                 d0= 
                 −1.723 
                   
                   
                   
                   
               
               
                 R1 
                 −2.108 
                 d1= 
                 0.667 
                 nd1 
                 1.5444 
                 ν1 
                 56.43 
               
               
                 R2 
                 −5.213 
                 d2= 
                 0.100 
                   
                   
                   
                   
               
               
                 R3 
                 4.673 
                 d3= 
                 0.391 
                 nd2 
                 1.6800 
                 ν2 
                 18.40 
               
               
                 R4 
                 2.752 
                 d4= 
                 0.500 
                   
                   
                   
                   
               
               
                 R5 
                 2.687 
                 d5= 
                 0.836 
                 nd3 
                 1.5444 
                 ν3 
                 56.43 
               
               
                 R6 
                 −1.957 
                 d6= 
                 0.221 
                   
                   
                   
                   
               
               
                 R7 
                 18.870 
                 d7= 
                 0.240 
                 nd4 
                 1.6800 
                 ν4 
                 18.40 
               
               
                 R8 
                 3.479 
                 d8= 
                 0.090 
                   
                   
                   
                   
               
               
                 R9 
                 −16.790 
                 d9= 
                 0.593 
                 nd5 
                 1.5444 
                 ν5 
                 56.43 
               
               
                 R10 
                 −358.255 
                 d10= 
                 0.109 
                   
                   
                   
                   
               
               
                 R11 
                 29.941 
                 d11= 
                 0.581 
                 nd6 
                 1.5444 
                 ν6 
                 56.43 
               
               
                 R12 
                 −0.947 
                 d12= 
                 0.040 
                   
                   
                   
                   
               
               
                 R13 
                 1.070 
                 d13= 
                 0.359 
                 nd7 
                 1.6153 
                 ν7 
                 26.00 
               
               
                 R14 
                 0.590 
                 d14= 
                 0.600 
                   
                   
                   
                   
               
               
                 R15 
                 ∞ 
                 d15= 
                 0.210 
                 ndg 
                 1.5168 
                 νg 
                 64.17 
               
               
                 R16 
                 ∞ 
                 d16= 
                 0.450 
               
               
                   
               
            
           
         
       
     
     Table 5 shows aspheric surface data of respective lenses in the camera optical lens  20  according to Embodiment 2 of the present invention. 
     
       
         
           
               
               
               
             
               
                 TABLE 5 
               
               
                   
               
             
            
               
                   
                 Conic coefficient 
                 Aspherical surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 k 
                 A4 
                 A6 
                 A8 
                 A10 
                 A12 
               
               
                   
               
               
                 R3 
                  9.8635E+00 
                 5.9865E−01 
                 −1.8931E+00 
                 6.2270E+00 
                 −1.5623E+01 
                 2.7229E+01 
               
               
                 R4 
                 −4.1964E+00 
                 1.9639E−01 
                 −1.8751E−01 
                 1.9781E+00 
                 −9.3538E+00 
                 2.9819E+01 
               
               
                 R5 
                 −7.6280E+00 
                 7.8024E−02 
                  3.2041E−02 
                 −3.4924E−01  
                  8.0611E−01 
                 −9.6759E−01  
               
               
                 R6 
                  2.7515E+00 
                 −7.0488E−02  
                  4.5874E−02 
                 7.0485E−01 
                 −3.7955E+00 
                 1.1268E+01 
               
               
                 R7 
                 −1.0000E+01 
                 −4.2165E−01  
                  4.4855E−01 
                 −7.8105E−01  
                  1.2602E+00 
                 −1.7614E+00  
               
               
                 R8 
                 −9.9910E+00 
                 −2.4634E−01  
                  1.1763E−01 
                 5.5700E−01 
                 −1.7770E+00 
                 2.7176E+00 
               
               
                 R9 
                  9.7036E+00 
                 3.4352E−02 
                 −4.5569E−01 
                 1.6709E+00 
                 −3.2105E+00 
                 3.6107E+00 
               
               
                 R10 
                  1.0000E+01 
                 7.9268E−02 
                 −7.3321E−01 
                 1.4573E+00 
                 −2.4018E+00 
                 2.8445E+00 
               
               
                 R11 
                  1.0000E+01 
                 3.3910E−01 
                 −9.2426E−01 
                 1.6135E+00 
                 −2.0625E+00 
                 1.7801E+00 
               
               
                 R12 
                 −7.5826E−01 
                 5.1229E−01 
                 −8.3708E−01 
                 1.5462E+00 
                 −1.7872E+00 
                 1.2973E+00 
               
               
                 R13 
                 −2.0984E+00 
                 −3.5447E−01  
                  1.3258E−01 
                 6.5472E−02 
                 −1.0564E−01 
                 6.0317E−02 
               
               
                 R14 
                 −2.8896E+00 
                 −2.1885E−01  
                  1.4980E−01 
                 −6.7499E−02  
                  1.9341E−02 
                 −3.2558E−03  
               
               
                   
               
            
           
           
               
               
               
            
               
                   
                 Conic coefficient 
                 Aspherical surface coefficients 
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 k 
                 A14 
                 A16 
                 A18 
                 A20 
               
               
                   
               
               
                 R3 
                  9.8635E+00 
                 −3.1189E+01 
                 2.2243E+01 
                 −8.9033E+00 
                 1.5161E+00 
               
               
                 R4 
                 −4.1964E+00 
                 −6.0909E+01 
                 7.6703E+01 
                 −5.3726E+01 
                 1.5865E+01 
               
               
                 R5 
                 −7.6280E+00 
                  2.6585E−01 
                 0.0000E+00 
                  0.0000E+00 
                 0.0000E+00 
               
               
                 R6 
                  2.7515E+00 
                 −2.1393E+01 
                 2.5094E+01 
                 −1.6292E+01 
                 4.4123E+00 
               
               
                 R7 
                 −1.0000E+01 
                  1.9835E+00 
                 −2.2561E+00  
                  1.8678E+00 
                 −6.4259E−01  
               
               
                 R8 
                 −9.9910E+00 
                 −2.4792E+00 
                 1.3748E+00 
                 −4.3046E−01 
                 5.8799E−02 
               
               
                 R9 
                  9.7036E+00 
                 −2.3663E+00 
                 8.4024E−01 
                 −1.2561E−01 
                 0.0000E+00 
               
               
                 R10 
                  1.0000E+01 
                 −2.1737E+00 
                 1.0090E+00 
                 −2.5610E−01 
                 2.7068E−02 
               
               
                 R11 
                  1.0000E+01 
                 −9.9975E−01 
                 3.4587E−01 
                 −6.6214E−02 
                 5.3370E−03 
               
               
                 R12 
                 −7.5826E−01 
                 −6.0634E−01 
                 1.7775E−01 
                 −2.9610E−02 
                 2.1285E−03 
               
               
                 R13 
                 −2.0984E+00 
                 −1.9601E−02 
                 3.7454E−03 
                 −3.8754E−04 
                 1.6608E−05 
               
               
                 R14 
                 −2.8896E+00 
                  2.2017E−04 
                 1.9906E−05 
                 −4.6271E−06 
                 2.4259E−07 
               
               
                   
               
            
           
         
       
     
     Table 6 shows data of free-form surfaces of the camera optical lens  20  according to Embodiment 2 of the present invention. 
     
       
         
           
               
               
             
               
                 TABLE 6 
               
               
                   
               
             
            
               
                   
                 Free-form surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 k 
                 X 4 Y 0   
                 X 2 Y 2   
                 X 0 Y 4   
                 X 6 Y 0   
                 X 4 Y 2   
                 X 2 Y 4   
                 X 0 Y 6   
               
               
                   
               
               
                 R1 
                 −2.0000E+01 
                 1.0069E−01 
                 2.0201E−01 
                 1.0096E−01 
                 −6.0143E−02 
                 −1.8092E−01 
                 −1.8120E−01 
                 −6.0501E−02 
               
               
                 R2 
                 −4.0592E+00 
                 9.4790E−01 
                 1.8988E+00 
                 9.4907E−01 
                 −2.1441E+00 
                 −6.4458E+00 
                 −6.4372E+00 
                 −2.1502E+00 
               
               
                   
               
               
                   
                 X 4 Y 6   
                 X 2 Y 8   
                 X 0 Y 10   
                 X 12 Y 0   
                 X 10 Y 2   
                 X 8 Y 4   
                 X 6 Y 6   
                 X 4 Y 8   
               
               
                   
               
               
                 R1 
                 −7.9233E−02 
                 −3.9628E−02  
                 −7.9194E−03  
                 1.5698E−03 
                  9.4141E−03 
                  2.3531E−02 
                  3.1362E−02 
                  2.3551E−02 
               
               
                 R2 
                 −1.0264E+02 
                 −5.1326E+01  
                 −1.0268E+01  
                 1.3942E+01 
                  8.3666E+01 
                  2.0911E+02 
                  2.7893E+02 
                  2.0921E+02 
               
               
                   
               
               
                   
                 X 2 Y 12   
                 X 0 Y 14   
                 X 16 Y 0   
                 X 14 Y 2   
                 X 12 Y 4   
                 X 10 Y 6   
                 X 8 Y 8   
                 X 6 Y 10   
               
               
                   
               
               
                 R1 
                 −1.3666E−03 
                 −1.9575E−04  
                 1.3726E−05 
                 1.1007E−04 
                  3.8600E−04 
                  7.7308E−04 
                  9.6366E−04 
                  7.7010E−04 
               
               
                 R2 
                 −8.6251E+01 
                 −1.2315E+01  
                 6.6894E+00 
                 5.3505E+01 
                  1.8726E+02 
                  3.7459E+02 
                  4.6800E+02 
                  3.7452E+02 
               
               
                   
               
               
                   
                 X 8 Y 10   
                 X 6 Y 12   
                 X 4 Y 14   
                 X 2 Y 16   
                 X 0 Y 18   
                 X 20 Y 0   
                 X 18 Y 2   
                 X 16 Y 4   
               
               
                   
               
               
                 R1 
                 −5.0448E−05 
                 −3.3805E−05  
                 −1.7139E−05  
                 −4.2880E−06  
                 −5.3062E−07 
                  0.0000E+00 
                  0.0000E+00 
                  0.0000E+00 
               
               
                 R2 
                 −2.5204E+02 
                 −1.6800E+02  
                 −7.1699E+01  
                 −1.8019E+01  
                 −2.0031E+00 
                  2.4784E−01 
                  2.4761E+00 
                  1.1150E+01 
               
               
                   
               
               
                   
                 X 8 Y 0   
                 X 6 Y 2   
                 X 4 Y 4   
                 X 2 Y 6   
                 X 0 Y 8   
                 X 10 Y 0   
                 X 8 Y 2   
                 X 6 Y 4   
               
               
                   
               
               
                 R1 
                  2.6516E−02 
                 1.0619E−01 
                 1.5933E−01 
                 1.0659E−01 
                  2.6662E−02 
                 −7.9141E−03 
                 −3.9575E−02 
                 −7.9076E−02 
               
               
                 R2 
                  5.2501E+00 
                 2.1034E+01 
                 3.1522E+01 
                 2.1006E+01 
                  5.2625E+00 
                 −1.0260E+01 
                 −5.1340E+01 
                 −1.0266E+02 
               
               
                   
               
               
                   
                 X 2 Y 10   
                 X 0 Y 12   
                 X 14 Y 0   
                 X 12 Y 2   
                 X 10 Y 4   
                 X 8 Y 6   
                 X 6 Y 8   
                 X 4 Y 10   
               
               
                   
               
               
                 R1 
                  9.3533E−03 
                 1.5635E−03 
                 −1.9581E−04  
                 −1.3704E−03  
                 −4.1169E−03 
                 −6.8581E−03 
                 −6.8544E−03 
                 −4.1044E−03 
               
               
                 R2 
                  8.3700E+01 
                 1.3934E+01 
                 −1.2322E+01  
                 −8.6249E+01  
                 −2.5864E+02 
                 −4.3126E+02 
                 −4.3115E+02 
                 −2.5888E+02 
               
               
                   
               
               
                   
                 X 4 Y 12   
                 X 2 Y 14   
                 X 0 Y 16   
                 X 18 Y 0   
                 X 16 Y 2   
                 X 14 Y 4   
                 X 12 Y 6   
                 X 10 Y 8   
               
               
                   
               
               
                 R1 
                  3.9020E−04 
                 1.1650E−04 
                 1.4205E−05 
                 −4.0206E−07  
                 −3.6535E−06 
                 −1.4708E−05 
                 −3.3805E−05 
                 −5.2040E−05 
               
               
                 R2 
                  1.8723E+02 
                 5.3473E+01 
                 6.6976E+00 
                 −1.9994E+00  
                 −1.7985E+01 
                 −7.1984E+01 
                 −1.6810E+02 
                 −2.5174E+02 
               
               
                   
               
               
                   
                 X 14 Y 6   
                 X 12 Y 8   
                 X 10 Y 10   
                 X 8 Y 12   
                 X 6 Y 14   
                 X 4 Y 16   
                 X 2 Y 18   
                 X 0 Y 20   
               
               
                   
               
               
                 R1 
                  0.0000E+00 
                 0.0000E+00 
                 0.0000E+00 
                 0.0000E+00 
                  0.0000E+00 
                  0.0000E+00 
                  0.0000E+00 
                  0.0000E+00 
               
               
                 R2 
                  2.9824E+01 
                 5.2067E+01 
                 6.2536E+01 
                 5.2216E+01 
                  2.9796E+01 
                  1.1016E+01 
                  2.5174E+00 
                  2.4528E−01 
               
               
                   
               
            
           
         
       
     
       FIG.  4    illustrates a case where an RMS spot diameter of the camera optical lens  20  according to Embodiment 2 is in a first quadrant. It can be seen from  FIG.  4    that the camera optical lens  20  according to Embodiment 2 can achieve excellent imaging quality. 
     As shown in Table 13, Embodiment 2 satisfies the respective conditions. 
     In this embodiment, the entrance pupil diameter of the camera optical lens is 0.908 mm. A full-field image height of the camera optical lens (along a diagonal direction) is 6.000 mm, an image height along the x direction of the camera optical lens is 4.800 mm, and an image height along the y direction of the camera optical lens is 3.600 mm. In such rectangular range, the best imaging effect can be achieved. A FOV (field of view) along a diagonal direction is 120.00°, a FOV along the x direction is 107.60°, and a FOV along the y direction is 90.91°. Thus, the camera optical lens  20  can satisfy design requirements for ultra-thin, wide-angle lenses while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics. 
     Embodiment 3 
     Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences from Embodiment 1 will be described below. 
       FIG.  5    is a schematic diagram of a structure of a camera optical lens  30  in accordance with Embodiment 3 of the present invention. In this embodiment, the second lens L 2  has a positive refractive power, the fifth lens L 5  has a positive refractive power, the image side surface of the first lens L 1  is concave in the paraxial region, and the object side surface of fourth lens L 4  is concave in the paraxial region. 
     Table 7 and Table 8 show design data of the camera optical lens  30  according to Embodiment 3 of the present invention, in which the object side surface and the image side surface of the seventh lens L 7  are each a free-form surface. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 7 
               
               
                   
               
               
                   
                 R 
                 d 
                 nd 
                 νd 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 S1 
                 ∞ 
                 d0= 
                 −1.041 
                   
                   
                   
                   
               
               
                 R1 
                 −3.511 
                 d1= 
                 0.257 
                 nd1 
                 1.5444 
                 ν1 
                 55.82 
               
               
                 R2 
                 1.621 
                 d2= 
                 0.169 
                   
                   
                   
                   
               
               
                 R3 
                 1.638 
                 d3= 
                 0.355 
                 nd2 
                 1.6400 
                 ν2 
                 23.54 
               
               
                 R4 
                 3.979 
                 d4= 
                 0.317 
                   
                   
                   
                   
               
               
                 R5 
                 2.272 
                 d5= 
                 0.603 
                 nd3 
                 1.5450 
                 ν3 
                 55.81 
               
               
                 R6 
                 −1.737 
                 d6= 
                 0.183 
                   
                   
                   
                   
               
               
                 R7 
                 −8.965 
                 d7= 
                 0.244 
                 nd4 
                 1.6613 
                 ν4 
                 20.37 
               
               
                 R8 
                 2.325 
                 d8= 
                 0.054 
                   
                   
                   
                   
               
               
                 R9 
                 −4.323 
                 d9= 
                 0.456 
                 nd5 
                 1.5450 
                 ν5 
                 55.81 
               
               
                 R10 
                 −1.312 
                 d10= 
                 0.054 
                   
                   
                   
                   
               
               
                 R11 
                 −3.618 
                 d11= 
                 0.547 
                 nd6 
                 1.5450 
                 ν6 
                 55.81 
               
               
                 R12 
                 −0.926 
                 d12= 
                 0.048 
                   
                   
                   
                   
               
               
                 R13 
                 2.401 
                 d13= 
                 0.808 
                 nd7 
                 1.5444 
                 ν7 
                 55.82 
               
               
                 R14 
                 1.078 
                 d14= 
                 0.333 
                   
                   
                   
                   
               
               
                 R15 
                 ∞ 
                 d15= 
                 0.231 
                 ndg 
                 1.5168 
                 νg 
                 64.17 
               
               
                 R16 
                 ∞ 
                 d16= 
                 0.296 
               
               
                   
               
            
           
         
       
     
     Table 8 shows aspheric surface data of respective lenses in the camera optical lens  30  according to Embodiment 3 of the present invention. 
     
       
         
           
               
               
               
             
               
                 TABLE 8 
               
               
                   
               
             
            
               
                   
                 Conic coefficient 
                 Aspherical surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 k 
                 A4 
                 A6 
                 A8 
                 A10 
                 A12 
               
               
                   
               
               
                 R1 
                 −2.0143E+02  
                  2.5445E−01 
                 −3.0287E−01  
                  2.4610E−01 
                 −1.3966E−01  
                  5.2075E−02 
               
               
                 R2 
                 5.8525E−01 
                  5.4492E−01 
                 −6.9429E−01  
                  1.2637E−01 
                 8.3418E−01 
                 −1.8058E+00 
               
               
                 R3 
                 1.0300E+00 
                 −2.5963E−02 
                 1.2355E−01 
                  1.0934E−01 
                 −9.1176E−02  
                 −7.6508E−02 
               
               
                 R4 
                 2.4910E+01 
                  1.3624E−02 
                 1.1026E+00 
                 −2.2645E+00 
                 2.5769E+00 
                  7.6302E+00 
               
               
                 R5 
                 3.0564E+00 
                  7.7243E−02 
                 −1.4248E−01  
                 −1.4580E−02 
                 4.4274E−01 
                  2.2558E−01 
               
               
                 R6 
                 2.8517E+00 
                 −2.6573E−01 
                 6.9194E−02 
                 −4.4218E−02 
                 2.0926E−01 
                  5.5716E−01 
               
               
                 R7 
                 1.0655E+02 
                 −1.2707E+00 
                 2.1502E+00 
                 −1.0192E+01 
                 4.6290E+01 
                 −1.4815E+02 
               
               
                 R8 
                 −3.7218E+01  
                 −7.1263E−01 
                 1.9815E+00 
                 −6.3346E+00 
                 1.3932E+01 
                 −1.9882E+01 
               
               
                 R9 
                 −9.2357E+02  
                 −2.5835E−01 
                 1.5940E+00 
                 −5.9499E+00 
                 1.3861E+01 
                 −2.0565E+01 
               
               
                 R10 
                 −8.6350E+00  
                 −9.5549E−02 
                 3.7003E−02 
                  6.0192E−02 
                 1.8562E−02 
                 −1.7049E−02 
               
               
                 R11 
                 4.4499E+00 
                  4.4622E−02 
                 −1.5972E−02  
                 −7.4345E−03 
                 1.8547E−02 
                  1.2676E−02 
               
               
                 R12 
                 −6.3306E−01  
                 −1.0692E−01 
                 9.4655E−01 
                 −2.0008E+00 
                 3.0980E+00 
                 −3.2463E+00 
               
               
                   
               
            
           
           
               
               
               
            
               
                   
                 Conic coefficient 
                 Aspherical surface coefficients 
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 k 
                 A14 
                 A16 
                 A18 
                 A20 
               
               
                   
               
               
                 R1 
                 −2.0143E+02  
                 −1.1141E−02  
                  9.9070E−04 
                 −1.7089E−05  
                  2.6946E−06 
               
               
                 R2 
                 5.8525E−01 
                 1.2584E+00 
                 −2.6580E−01 
                 1.9701E−02 
                 −1.0919E−02 
               
               
                 R3 
                 1.0300E+00 
                 7.4597E−02 
                  1.4444E−01 
                 −9.1964E−02  
                 −6.2564E−01 
               
               
                 R4 
                 2.4910E+01 
                 −3.1653E+00  
                 −2.5395E+01 
                 −3.0986E+01  
                  1.3415E+02 
               
               
                 R5 
                 3.0564E+00 
                 −3.5852E+00  
                  2.6496E+00 
                 2.5901E+01 
                 −1.6966E+01 
               
               
                 R6 
                 2.8517E+00 
                 8.4394E−01 
                 −7.9187E−01 
                 −6.1848E+00  
                  1.1558E+01 
               
               
                 R7 
                 1.0655E+02 
                 3.1844E+02 
                 −4.0344E+02 
                 2.5880E+02 
                 −5.8807E+01 
               
               
                 R8 
                 −3.7218E+01  
                 1.9817E+01 
                 −1.3545E+01 
                 5.5173E+00 
                 −9.1974E−01 
               
               
                 R9 
                 −9.2357E+02  
                 1.9905E+01 
                 −1.2389E+01 
                 4.4779E+00 
                 −6.9986E−01 
               
               
                 R10 
                 −8.6350E+00  
                 −2.3584E−02  
                 −1.4671E−02 
                 −1.1317E−03  
                  1.1544E−02 
               
               
                 R11 
                 4.4499E+00 
                 −9.9850E−03  
                 −8.6241E−03 
                 2.9676E−03 
                 −9.5487E−05 
               
               
                 R12 
                 −6.3306E−01  
                 2.2396E+00 
                 −9.6248E−01 
                 2.3072E−01 
                 −2.3344E−02 
               
               
                   
               
            
           
         
       
     
     Table 9 shows data of free-form surfaces of the camera optical lens  30  according to Embodiment 3 of the present invention. 
     
       
         
           
               
               
             
               
                 TABLE 9 
               
               
                   
               
             
            
               
                   
                 Free-form surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 k 
                 X 4 Y 0   
                 X 2 Y 2   
                 X 0 Y 4   
                 X 6 Y 0   
                 X 4 Y 2   
                 X 2 Y 4   
                 X 0 Y 6   
               
               
                   
               
               
                 R13 
                 −3.9316E+03 
                 −2.6201E−01 
                 −5.1399E−01 
                 −2.5948E−01 
                  3.4503E−01 
                 1.0324E+00 
                 1.0262E+00 
                 3.4285E−01 
               
               
                 R14 
                 −4.7946E+00 
                 −2.7928E−01 
                 −5.4913E−01 
                 −2.7319E−01 
                  2.3610E−01 
                 7.0933E−01 
                 7.1106E−01 
                 2.3668E−01 
               
               
                   
               
               
                   
                 X 4 Y 6   
                 X 2 Y 8   
                 X 0 Y 10   
                 X 12 Y 0   
                 X 10 Y 2   
                 X 8 Y 4   
                 X 6 Y 6   
                 X 4 Y 8   
               
               
                   
               
               
                 R13 
                 −3.2756E+00 
                 −1.6371E+00 
                 −3.2713E−01 
                  7.2227E−01 
                  4.3324E+00 
                 1.0833E+01 
                 1.4445E+01 
                 1.0836E+01 
               
               
                 R14 
                  9.5457E−01 
                  4.7749E−01 
                  9.5425E−02 
                 −3.5185E−02 
                 −2.1111E−01 
                 −5.2779E−01  
                 −7.0371E−01  
                 −5.2776E−01  
               
               
                   
               
               
                   
                 X 2 Y 12   
                 X 0 Y 14   
                 X 16 Y 0   
                 X 14 Y 2   
                 X 12 Y 4   
                 X 10 Y 6   
                 X 8 Y 8   
                 X 6 Y 10   
               
               
                   
               
               
                 R13 
                 −4.7320E+00 
                 −6.7642E−01 
                  3.4678E−01 
                  2.7740E+00 
                  9.7103E+00 
                 1.9421E+01 
                 2.4276E+01 
                 1.9421E+01 
               
               
                 R14 
                  6.0622E−02 
                  8.6556E−03 
                 −1.3549E−03 
                 −1.0839E−02 
                 −3.7936E−02 
                 −7.5872E−02  
                 −9.4841E−02  
                 −7.5873E−02  
               
               
                   
               
               
                   
                 X 8 Y 10   
                 X 6 Y 12   
                 X 4 Y 14   
                 X 2 Y 16   
                 X 0 Y 18   
                 X 20 Y 0   
                 X 18 Y 2   
                 X 16 Y 4   
               
               
                   
               
               
                 R13 
                 −1.1668E+01 
                 −7.7764E+00 
                 −3.3333E+00 
                 −8.3334E−01 
                 −9.2586E−02 
                 9.9921E−03 
                 1.0004E−01 
                 4.5049E−01 
               
               
                 R14 
                  1.5250E−02 
                  1.0165E−02 
                  4.3543E−03 
                  1.0915E−03 
                  1.2105E−04 
                 −4.6810E−06  
                 −4.6866E−05  
                 −2.1030E−04  
               
               
                   
               
               
                   
                 X 8 Y 0   
                 X 6 Y 2   
                 X 4 Y 4   
                 X 2 Y 6   
                 X 0 Y 8   
                 X 10 Y 0   
                 X 8 Y 2   
                 X 6 Y 4   
               
               
                   
               
               
                 R13 
                 −1.8057E−01 
                 −7.2371E−01 
                 −1.0844E+00 
                 −7.2427E−01 
                 −1.8087E−01 
                 −3.2768E−01  
                 −1.6402E+00  
                 −3.2784E+00  
               
               
                 R14 
                 −1.7633E−01 
                 −7.0602E−01 
                 −1.0589E+00 
                 −7.0544E−01 
                 −1.7656E−01 
                 9.5490E−02 
                 4.7728E−01 
                 9.5452E−01 
               
               
                   
               
               
                   
                 X 2 Y 10   
                 X 0 Y 12   
                 X 14 Y 0   
                 X 12 Y 2   
                 X 10 Y 4   
                 X 8 Y 6   
                 X 6 Y 8   
                 X 4 Y 10   
               
               
                   
               
               
                 R13 
                  4.3378E+00 
                  7.2233E−01 
                 −6.7650E−01 
                 −4.7361E+00 
                 −1.4207E+01 
                 −2.3677E+01  
                 −2.3677E+01  
                 −1.4204E+01  
               
               
                 R14 
                 −2.1102E−01 
                 −3.5199E−02 
                  8.6564E−03 
                  6.0598E−02 
                  1.8179E−01 
                 3.0299E−01 
                 3.0299E−01 
                 1.8180E−01 
               
               
                   
               
               
                   
                 X 4 Y 12   
                 X 2 Y 14   
                 X 0 Y 16   
                 X 18 Y 0   
                 X 16 Y 2   
                 X 14 Y 4   
                 X 12 Y 6   
                 X 10 Y 8   
               
               
                   
               
               
                 R13 
                  9.7119E+00 
                  2.7759E+00 
                  3.4678E−01 
                 −9.2589E−02 
                 −8.3329E−01 
                 −3.3324E+00  
                 −7.7755E+00  
                 −1.1664E+01  
               
               
                 R14 
                 −3.7942E−02 
                 −1.0835E−02 
                 −1.3550E−03 
                  1.2103E−04 
                  1.0891E−03 
                 4.3577E−03 
                 1.0169E−02 
                 1.5251E−02 
               
               
                   
               
               
                   
                 X 14 Y 6   
                 X 12 Y 8   
                 X 10 Y 10   
                 X 8 Y 12   
                 X 6 Y 14   
                 X 4 Y 16   
                 X 2 Y 18   
                 X 0 Y 20   
               
               
                   
               
               
                 R13 
                  1.2012E+00 
                  2.1011E+00 
                  2.5195E+00 
                  2.0986E+00 
                  1.1998E+00 
                 4.4748E−01 
                 9.8137E−02 
                 9.9652E−03 
               
               
                 R14 
                 −5.6027E−04 
                 −9.8082E−04 
                 −1.1778E−03 
                 −9.8262E−04 
                 −5.6236E−04 
                 −2.1115E−04  
                 −4.2940E−05  
                 −4.6192E−06  
               
               
                   
               
            
           
         
       
     
       FIG.  6    illustrates a case where an RMS spot diameter of the camera optical lens  30  according to Embodiment 3 is in a first quadrant. It can be seen from  FIG.  6    that the camera optical lens  30  according to Embodiment 3 can achieve excellent imaging quality. 
     Table 13 below lists values corresponding to respective conditions in the present embodiment. The camera optical lens according to Embodiment 3 satisfies the respective conditions. 
     In this embodiment, the entrance pupil diameter of the camera optical lens is 0.664 mm. A full-field image height of the camera optical lens (along a diagonal direction) is 6.000 mm, an image height along the x direction of the camera optical lens is 4.800 mm, and an image height along the y direction of the camera optical lens is 3.600 mm. In such rectangular range, the best imaging effect can be achieved. A FOV (field of view) along a diagonal direction is 116.68°, a FOV along the x direction is 106.50°, and a FOV along the y direction is 94.43°. Thus, the camera optical lens  30  can satisfy design requirements for ultra-thin, wide-angle lenses while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics. 
     Embodiment 4 
     Embodiment 4 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences from Embodiment 1 will be described below. 
       FIG.  7    is a schematic diagram of a structure of a camera optical lens  40  in accordance with Embodiment 4 of the present invention. In this embodiment, the second lens L 2  has a positive refractive power, the fifth lens L 5  has a positive refractive power, the image side surface of the first lens L 1  is concave in the paraxial region, and the object side surface of fourth lens L 4  is concave in the paraxial region. 
     Table 10 and Table 11 show design data of the camera optical lens  40  according to Embodiment 4 of the present invention, in which the object side surface and the image side surface of the second lens L 2  are each a free-form surface. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 10 
               
               
                   
               
               
                   
                 R 
                 d 
                 nd 
                 νd 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 S1 
                 ∞ 
                 d0= 
                 −0.949 
                   
                   
                   
                   
               
               
                 R1 
                 −3.186 
                 d1= 
                 0.240 
                 nd1 
                 1.5444 
                 ν1 
                 55.82 
               
               
                 R2 
                 1.475 
                 d2= 
                 0.150 
                   
                   
                   
                   
               
               
                 R3 
                 1.494 
                 d3= 
                 0.323 
                 nd2 
                 1.6400 
                 ν2 
                 23.54 
               
               
                 R4 
                 3.651 
                 d4= 
                 0.288 
                   
                   
                   
                   
               
               
                 R5 
                 2.068 
                 d5= 
                 0.549 
                 nd3 
                 1.5450 
                 ν3 
                 55.81 
               
               
                 R6 
                 −1.578 
                 d6= 
                 0.166 
                   
                   
                   
                   
               
               
                 R7 
                 −8.148 
                 d7= 
                 0.222 
                 nd4 
                 1.6613 
                 ν4 
                 20.37 
               
               
                 R8 
                 2.128 
                 d8= 
                 0.051 
                   
                   
                   
                   
               
               
                 R9 
                 −4.171 
                 d9= 
                 0.417 
                 nd5 
                 1.5450 
                 ν5 
                 55.81 
               
               
                 R10 
                 −1.241 
                 d10= 
                 0.050 
                   
                   
                   
                   
               
               
                 R11 
                 −3.286 
                 d11= 
                 0.501 
                 nd6 
                 1.5450 
                 ν6 
                 55.81 
               
               
                 R12 
                 −0.842 
                 d12= 
                 0.049 
                   
                   
                   
                   
               
               
                 R13 
                 3.015 
                 d13= 
                 0.735 
                 nd7 
                 1.5444 
                 ν7 
                 55.82 
               
               
                 R14 
                 0.946 
                 d14= 
                 0.303 
                   
                   
                   
                   
               
               
                 R15 
                 ∞ 
                 d15= 
                 0.210 
                 ndg 
                 1.5168 
                 νg 
                 64.17 
               
               
                 R16 
                 ∞ 
                 d16= 
                 0.269 
               
               
                   
               
            
           
         
       
     
     Table 11 shows aspheric surface data of respective lenses in the camera optical lens  40  according to Embodiment 4 of the present invention. 
     
       
         
           
               
               
               
             
               
                 TABLE 11 
               
               
                   
               
             
            
               
                   
                 Conic coefficient 
                 Aspherical surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
            
               
                   
                 k 
                 A4 
                 A6 
                 A8 
                 A10 
                 A12 
               
               
                   
               
               
                 R1 
                 −2.0279E+02 
                  3.3868E−01 
                 −4.8766E−01  
                  4.7969E−01 
                 −3.2925E−01  
                  1.4862E−01 
               
               
                 R2 
                  5.8971E−01 
                  7.2530E−01 
                 −1.1181E+00  
                  2.4629E−01 
                 1.9670E+00 
                 −5.1522E+00 
               
               
                 R5 
                  3.0510E+00 
                  1.0294E−01 
                 −2.2870E−01  
                 −2.7078E−02 
                 1.0358E+00 
                  6.3620E−01 
               
               
                 R6 
                  2.8717E+00 
                 −3.5721E−01 
                 1.0721E−01 
                 −8.8027E−02 
                 4.8995E−01 
                  1.5804E+00 
               
               
                 R7 
                  1.0527E+02 
                 −1.6902E+00 
                 3.4654E+00 
                 −1.9859E+01 
                 1.0914E+02 
                 −4.2271E+02 
               
               
                 R8 
                 −3.5464E+01 
                 −9.4749E−01 
                 3.1917E+00 
                 −1.2344E+01 
                 3.2852E+01 
                 −5.6724E+01 
               
               
                 R9 
                 −9.8637E+02 
                 −3.4687E−01 
                 2.5642E+00 
                 −1.1597E+01 
                 3.2683E+01 
                 −5.8675E+01 
               
               
                 R10 
                 −9.0046E+00 
                 −1.2349E−01 
                 6.2495E−02 
                  1.1903E−01 
                 4.4295E−02 
                 −4.8762E−02 
               
               
                 R11 
                  4.5978E+00 
                  5.7384E−02 
                 −2.7444E−02  
                 −1.4815E−02 
                 4.4844E−02 
                  3.8187E−02 
               
               
                 R12 
                 −6.3341E−01 
                 −1.4168E−01 
                 1.5246E+00 
                 −3.8991E+00 
                 7.3051E+00 
                 −9.2624E+00 
               
               
                 R13 
                 −2.5453E+03 
                 −2.3239E−01 
                 3.1154E−01 
                 −1.6476E−01 
                 −2.9806E−01  
                  6.5660E−01 
               
               
                 R14 
                 −4.9959E+00 
                 −2.4934E−01 
                 2.1501E−01 
                 −1.6050E−01 
                 8.6766E−02 
                 −3.1989E−02 
               
               
                   
               
            
           
           
               
               
               
            
               
                   
                 Conic coefficient 
                 Aspherical surface coefficients 
               
            
           
           
               
               
               
               
               
               
            
               
                   
                 k 
                 A14 
                 A16 
                 A18 
                 A20 
               
               
                   
               
               
                 R1 
                 −2.0279E+02 
                 −3.8455E−02  
                  4.1389E−03 
                 −8.9059E−05  
                  1.8548E−05 
               
               
                 R2 
                  5.8971E−01 
                 4.3442E+00 
                 −1.1103E+00 
                 9.9634E−02 
                 −6.6708E−02 
               
               
                 R5 
                  3.0510E+00 
                 −1.2384E+01  
                  1.0351E+01 
                 1.2108E+02 
                 −2.2495E+02 
               
               
                 R6 
                  2.8717E+00 
                 2.8885E+00 
                 −3.1890E+00 
                 −3.0531E+01  
                  7.5454E+01 
               
               
                 R7 
                  1.0527E+02 
                 1.0993E+03 
                 −1.6852E+03 
                 1.3083E+03 
                 −3.5870E+02 
               
               
                 R8 
                 −3.5464E+01 
                 6.8416E+01 
                 −5.6579E+01 
                 2.7887E+01 
                 −5.6250E+00 
               
               
                 R9 
                 −9.8637E+02 
                 6.8716E+01 
                 −5.1751E+01 
                 2.2633E+01 
                 −4.2799E+00 
               
               
                 R10 
                 −9.0046E+00 
                 −8.1669E−02  
                 −6.1469E−02 
                 −5.5690E−03  
                  7.1319E−02 
               
               
                 R11 
                  4.5978E+00 
                 −3.2307E−02  
                 −3.4226E−02 
                 1.6088E−02 
                 −4.9737E−04 
               
               
                 R12 
                 −6.3341E−01 
                 7.7315E+00 
                 −4.0206E+00 
                 1.1662E+00 
                 −1.4276E−01 
               
               
                 R13 
                 −2.5453E+03 
                 −6.1497E−01  
                  3.1528E−01 
                 −8.4157E−02  
                  9.0921E−03 
               
               
                 R14 
                 −4.9959E+00 
                 7.8696E−03 
                 −1.2317E−03 
                 1.1005E−04 
                 −4.2423E−06 
               
               
                   
               
            
           
         
       
     
     Table 12 shows data of free-form surfaces of the camera optical lens  40  according to Embodiment 4 of the present invention. 
     
       
         
           
               
               
             
               
                 TABLE 12 
               
               
                   
               
             
            
               
                   
                 Free-form surface coefficients 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 k 
                 X 4 Y 0   
                 X 2 Y 2   
                 X 0 Y 4   
                 X 6 Y 0   
                 X 4 Y 2   
                 X 2 Y 4   
                 X 0 Y 6   
               
               
                   
               
               
                 R3 
                  1.0084E+00 
                 −3.7496E−02 
                 −7.5272E−02 
                 −3.7598E−02 
                  1.9819E−01 
                  5.9005E−01 
                  5.9495E−01 
                  1.9820E−01 
               
               
                 R4 
                  2.4838E+01 
                  2.1076E−02 
                  4.4397E−02 
                  2.1263E−02 
                  1.7712E+00 
                  5.3130E+00 
                  5.3218E+00 
                  1.7711E+00 
               
               
                   
               
               
                   
                 X 4 Y 6   
                 X 2 Y 8   
                 X 0 Y 10   
                 X 12 Y 0   
                 X 10 Y 2   
                 X 8 Y 4   
                 X 6 Y 6   
                 X 4 Y 8   
               
               
                   
               
               
                 R3 
                 −2.0872E+00 
                 −1.0430E+00 
                 −2.0931E−01 
                 −2.0787E−01 
                 −1.2462E+00 
                 −3.1207E+00 
                 −4.0787E+00 
                 −3.0881E+00 
               
               
                 R4 
                  6.0829E+01 
                  3.0397E+01 
                  6.1012E+00 
                  2.1821E+01 
                  1.3059E+02 
                  3.2516E+02 
                  4.3454E+02 
                  3.2734E+02 
               
               
                   
               
               
                   
                 X 2 Y 12   
                 X 0 Y 14   
                 X 16 Y 0   
                 X 14 Y 2   
                 X 12 Y 4   
                 X 10 Y 6   
                 X 8 Y 8   
                 X 6 Y 10   
               
               
                   
               
               
                 R3 
                  1.9829E+00 
                  2.7432E−01 
                  6.1978E−01 
                  4.9811E+00 
                  1.8327E+01 
                  3.5566E+01 
                  4.5057E+01 
                  3.4926E+01 
               
               
                 R4 
                 −7.2734E+01 
                 −1.0276E+01 
                 −1.0341E+02 
                 −8.3260E+02 
                 −2.8949E+03 
                 −5.7047E+03 
                 −7.4372E+03 
                 −5.7907E+03 
               
               
                   
               
               
                   
                 X 8 Y 10   
                 X 6 Y 12   
                 X 4 Y 14   
                 X 2 Y 16   
                 X 0 Y 18   
                 X 20 Y 0   
                 X 18 Y 2   
                 X 16 Y 4   
               
               
                   
               
               
                 R3 
                 −5.9307E+01 
                 −3.7891E+01 
                 −1.5831E+01 
                 −3.5228E+00 
                 −4.6873E−01 
                 −3.8868E+00 
                 −3.8833E+01 
                 −1.7130E+02 
               
               
                 R4 
                 −1.7195E+04 
                 −1.2102E+04 
                 −5.1983E+03 
                 −1.3314E+03 
                 −1.4700E+02 
                  8.5521E+02 
                  8.4946E+03 
                  3.8198E+04 
               
               
                   
               
               
                   
                 X 8 Y 0   
                 X 6 Y 2   
                 X 4 Y 4   
                 X 2 Y 6   
                 X 0 Y 8   
                 X 10 Y 0   
                 X 8 Y 2   
                 X 6 Y 4   
               
               
                   
               
               
                 R3 
                  2.1566E−01 
                  8.5493E−01 
                  1.2871E+00 
                  8.6457E−01 
                  2.1584E−01 
                 −2.0969E−01 
                 −1.0547E+00 
                 −2.1254E+00 
               
               
                 R4 
                 −4.4213E+00 
                 −1.7692E+01 
                 −2.6470E+01 
                 −1.7699E+01 
                 −4.4186E+00 
                  6.0912E+00 
                  3.0402E+01 
                  6.0692E+01 
               
               
                   
               
               
                   
                 X 2 Y 10   
                 X 0 Y 12   
                 X 14 Y 0   
                 X 12 Y 2   
                 X 10 Y 4   
                 X 8 Y 6   
                 X 6 Y 8   
                 X 4 Y 10   
               
               
                   
               
               
                 R3 
                 −1.2297E+00 
                 −2.0754E−01 
                  2.7505E−01 
                  1.9368E+00 
                  6.0014E+00 
                  9.9666E+00 
                  9.8504E+00 
                  5.8422E+00 
               
               
                 R4 
                  1.3075E+02 
                  2.1845E+01 
                 −1.0315E+01 
                 −7.3218E+01 
                 −2.2921E+02 
                 −3.7169E+02 
                 −3.6739E+02 
                 −2.1516E+02 
               
               
                   
               
               
                   
                 X 4 Y 12   
                 X 2 Y 14   
                 X 0 Y 16   
                 X 18 Y 0   
                 X 16 Y 2   
                 X 14 Y 4   
                 X 12 Y 6   
                 X 10 Y 8   
               
               
                   
               
               
                 R3 
                  1.7562E+01 
                  5.1382E+00 
                  6.1498E−01 
                 −4.5089E−01 
                 −4.0249E+00 
                 −1.3913E+01 
                 −3.6531E+01 
                 −6.0083E+01 
               
               
                 R4 
                 −2.8787E+03 
                 −8.3079E+02 
                 −1.0343E+02 
                 −1.4659E+02 
                 −1.3406E+03 
                 −5.2576E+03 
                 −1.1588E+04 
                 −1.7133E+04 
               
               
                   
               
               
                   
                 X 14 Y 6   
                 X 12 Y 8   
                 X 10 Y 10   
                 X 8 Y 12   
                 X 6 Y 14   
                 X 4 Y 16   
                 X 2 Y 18   
                 X 0 Y 20   
               
               
                   
               
               
                 R3 
                 −4.5337E+02 
                 −8.2879E+02 
                 −9.5539E+02 
                 −8.1944E+02 
                 −4.6645E+02 
                 −1.7349E+02 
                 −3.7329E+01 
                 −3.9440E+00 
               
               
                 R4 
                  1.0712E+05 
                  1.9135E+05 
                  2.1394E+05 
                  1.9049E+05 
                  1.0582E+05 
                  3.8771E+04 
                  8.4584E+03 
                  8.5202E+02 
               
               
                   
               
            
           
         
       
     
       FIG.  8    illustrates a case where an RMS spot diameter of the camera optical lens  40  according to Embodiment 4 is in a first quadrant. It can be seen from  FIG.  8    that the camera optical lens  40  according to Embodiment 4 can achieve excellent imaging quality. 
     Table 13 below lists values corresponding to respective conditions in the present embodiment. The camera optical lens according to Embodiment 4 satisfies the respective conditions. 
     In this embodiment, the entrance pupil diameter of the camera optical lens is 0.669 mm. A full-field image height of the camera optical lens (along a diagonal direction) is 6.000 mm, an image height along the x direction of the camera optical lens is 4.800 mm, and an image height along the y direction of the camera optical lens is 3.600 mm. In such rectangular range, the best imaging effect can be achieved. A FOV (field of view) along a diagonal direction is 120.43°, a FOV along the x direction is 110.45°, and a FOV along the y direction is 98.99°. Thus, the camera optical lens  40  can satisfy design requirements for ultra-thin, wide-angle lenses while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 13 
               
               
                   
               
               
                 Parameters and 
                 Embodi- 
                 Embodi- 
                 Embodi- 
                 Embodi- 
               
               
                 Conditions 
                 ment 1 
                 ment 2 
                 ment 3 
                 ment 4 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 f1/f 
                 −4.43 
                 −3.96 
                 −1.54 
                 −1.36 
               
               
                 d1/d2 
                 5.12 
                 6.67 
                 1.52 
                 1.60 
               
               
                 f 
                 1.770 
                 1.770 
                 1.291 
                 1.337 
               
               
                 f1 
                 −7.837 
                 −7.011 
                 −1.993 
                 −1.811 
               
               
                 f2 
                 −10.626 
                 −10.626 
                 4.064 
                 3.696 
               
               
                 f3 
                 2.302 
                 2.214 
                 1.900 
                 1.728 
               
               
                 f4 
                 −6.318 
                 −6.251 
                 −2.737 
                 −2.501 
               
               
                 f5 
                 −191.666 
                 −32.273 
                 3.268 
                 3.075 
               
               
                 f6 
                 1.711 
                 1.692 
                 2.122 
                 1.929 
               
               
                 f7 
                 −2.863 
                 −2.969 
                 −4.562 
                 −2.883 
               
               
                 FNO 
                 1.95 
                 1.95 
                 2.00 
                 2.00 
               
               
                 TTL 
                 6.099 
                 5.987 
                 4.955 
                 4.523 
               
               
                 FOV 
                 120.00° 
                 120.00° 
                 116.68° 
                 120.43° 
               
               
                 IH 
                 6.00 
                 6.00 
                 6.00 
                 6.00 
               
               
                   
               
            
           
         
       
     
     It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present invention. In practice, one having ordinary skill in the art can make various modifications to these embodiments in forms and details without departing from the spirit and scope of the present invention.