Camera Optical Lens

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Applications Ser. No. 201710975262.3 and Ser. No. 201710975233.7 filed on Oct. 19, 2017, the entire content of which is incorporated herein by reference.

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to optical lens, in particular to a camera optical lens suitable for handheld devices such as smart phones and digital cameras and imaging devices.

DESCRIPTION OF RELATED ART

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but the photosensitive devices of general camera lens are no other than Charge Coupled Device (CCD) or Complementary metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices shrink, coupled with the current development trend of electronic products being that their functions should be better and their shape should be thin and small, miniature camera lens with good imaging quality therefor has become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. And, with the development of technology and the increase of the diverse demands of users, and under this circumstances that the pixel area of photosensitive devices is shrinking steadily and the requirement of the system for the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens design. There is an urgent need for ultra-thin wide-angle camera lenses which have good optical characteristics and the chromatic aberration of which is fully corrected.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.

FIG. 1 is a schematic diagram of a camera optical lens in accordance with a first embodiment of the present invention;

FIG. 2 shows the longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 shows the lateral color of the camera optical lens shown in FIG. 1;

FIG. 4 presents a schematic diagram of the field curvature and distortion of the camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a camera optical lens in accordance with a second embodiment of the present invention;

FIG. 6 presents the longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 presents the lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 presents the field curvature and distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a camera optical lens in accordance with a third embodiment of the present invention;

FIG. 10 presents the longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 presents the lateral color of the camera optical lens shown in FIG. 9;

FIG. 12 presents the field curvature and distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure.

Embodiment 1

As referring to FIG. 1, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of embodiment 1 of the present invention, the camera optical lens 10 comprises 7 lenses. Specifically, from the object side to the image side, the camera optical lens 10 comprises in sequence: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. Optical element like optical filter GF can be arranged between the seventh lens L7 and the image surface Si. The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, the sixth lens L6 is made of glass material, the seventh lens L7 is made of glass material;

Here, the focal length of the whole camera optical lens 10 is defined as f, the focal length of the first lens L1 is defined as f1, the focal length of the third lens L3 is defined as f3, the focal length of the fourth lens L4 is defined as f4, the refractive power of the fourth lens L6 is defined as n6, the refractive power of the fourth lens L7 is defined as n7, the curvature radius of the object side surface of the seventh lens L7 is defined as R13, the curvature radius of the image side surface of the seventh lens L7 is defined as R14. The f, f1, f3, f4, n4, d7, TTL, R13 and R14 satisfy the following conditions: 1≤f1/f≤1.5, 1.7≤n6≤2.2, −2≤f3/f4≤2; −10≤(R13+R14)/(R13−R14)≤10; 1.7≤n7≤2.2.

condition 1≤f1/f≤1.5 fixes the positive refractive power of the first lens L1. If the lower limit of the set value is exceeded, although it benefits the ultra thin development of lenses, but the positive refractive power of the first lens L1 will be too strong, problem like aberration is difficult to be corrected, and it is also unfavorable for wide-angle development of lens. On the contrary, if the higher limit of the set value is exceeded, the positive refractive power of the first lens becomes too weak, it is then difficult to develop ultra thin lenses. Preferably, the following condition shall be met, 1≤f1/f≤1.3.

condition 1.7≤n6≤2.2 fixes the refractive power of the sixth lens L6, refractive power within this range benefits the ultra thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be met, 1.7≤n6≤2.09.

condition −2≤f3/f4≤2 fixes the ratio between the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4, a ratio within this range can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the following condition shall be met, −1.95≤f3/f4≤1.45.

condition −10≤(R13+R14)/(R13−R14)≤10 fixes the shape of the seventh lens L7, when the value is beyond this range, with the development into the direction of ultra thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be met, 0.18≤(R13+R14)/(R13−R14)≤0.58.

condition 1.7≤n7≤2.2 fixes the refractive power of the seventh lens L7, refractive power within this range benefits the ultra thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be met, 1.7≤n7≤2.06.

When the focal length of the camera optical lens 10 of the present invention, the focal length of each lens, the refractive power of the related lens, and the total optical length, the thickness on-axis and the curvature radius of the camera optical lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and satisfies the design requirement of low TTL.

In this embodiment, the object side surface of the first lens L1 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has positive refractive power; the focal length of the whole camera optical lens is f, the focal length of the first lens L1 is f1, the curvature radius of the object side surface of the first lens L1 is R1, the curvature radius of the image side surface of the first lens L1 is R2 and the thickness on-axis of the first lens L1 is d1, they satisfy the following condition: −2.51≤(R1+R2)/(R1−R2)≤−0.80, this condition reasonably controls the shape of the first lens, then the first lens can effectively correct the spherical aberration of the system; if the condition 0.33≤d1≤0.98 is met it is beneficial for the realization of ultra-thin lens. Preferably, the following condition shall be met, −1.57≤(R1+R2)/(R1−R2)≤−0.99; 0.52≤d1≤0.78.

In this embodiment, the object side surface of the second lens L2 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2, the curvature radius of the object side surface of the second lens L2 is R3, the curvature radius of image side surface of the second lens L2 is R4 and the thickness on-axis of the second lens L2 is d3, they satisfy the following condition: when the condition −6.75≤f2/f≤−1.87 is met, the negative refractive power of the second lens L2 is controlled within reasonable scope, the spherical aberration caused by the first lens L1 which has positive refractive power and the field curvature of the system then can be reasonably and effectively balanced; the condition 2.06≤(R3+R4)/(R3−R4)≤6.66 fixes the shape of the second lens L2, when value is beyond this range, with the development into the direction of ultra thin and wide-angle lenses, problem like on-axis chromatic aberration is difficult to be corrected; if the condition 0.12≤d3≤0.40 is met, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be met, −4.22≤f2/f≤−2.34; 3.29≤(R3+R4)/(R3−R4)≤5.33; 0.2≤d3≤0.32.

In this embodiment, the object side surface of the third lens L3 is a concave surface relative to the proximal axis, its image side surface is a convex surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the third lens L3 is f3, the curvature radius of the object side surface of the third lens L3 is R5, the curvature radius of the image side surface of the third lens L3 is R6 and the thickness on-axis of the third lens L3 is d5, they satisfy the condition: −50.50≤f3/f≤−4.48, by meeting this condition, it is helpful for the system to obtain good ability in balancing the field curvature, so that the image quality can be effectively improved; by meeting the condition −33.91≤(R5+R6)/(R5−R6)≤−3.86 the shape of the third lens L3 can be effectively controlled, it is beneficial for the shaping of the third lens L3 and bad shaping and stress generation due to extra large curvature of surface of the third lens L3 can be avoided; when the condition 0.17≤d5≤0.56 is met, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be met, −31.56≤f3/f≤−5.59; −21.2≤(R5+R6)/(R5−R6)≤−4.83; 0.27≤d5≤0.44.

In this embodiment, the object side surface of the fourth lens L4 is a convex surface relative to the proximal axis, the focal length of the whole camera optical lens 10 is f, the focal length of the fourth lens L4 is f4, the curvature radius of the object side surface of the fourth lens L4 is R7, the curvature radius of the image side surface of the fourth lens L4 is R8 and the thickness on-axis of the fourth lens L4 is d7, they satisfy the condition: −56.14≤f4/f≤5420.53, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −1.02≤(R7+R8)/(R7−R8)≤314.95 fixes the shape of the fourth lens L4, when beyond this range, with the development into the direction of ultra thin and wide-angle lens, the problem like chromatic aberration is difficult to be corrected; when the condition 0.25≤d7≤0.82 is met, it is beneficial for realization of ultra-thin lenses. Preferably, the following conditions shall be met, −35.09≤f4/f≤4336.42; −0.64≤(R7+R8)/(R7−R8)≤251.96; 0.4≤d7≤0.66.

In this embodiment, the image side surface of the fifth lens L5 is a convex surface relative to the proximal axis, and it has positive refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the fifth lens L5 is f5, the curvature radius of the object side surface of the fifth lens L5 is R9, the curvature radius of the image side surface of the fifth lens L5 is R10 and the thickness on-axis of the fifth lens L5 is d9, they satisfy the condition: 0.28≤f5/f≤0.91, the limitation on the fifth lens L5 can effectively make the light angle of the camera lens flat and the tolerance sensitivity reduces; the condition 0.45≤(R9+R10)/(R9−R10)≤1.57 fixes the shape of the fifth lens L5, when beyond this range, with the development into the direction of ultra thin and wide-angle lens, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.34≤d9≤1.24 is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be met, 0.44≤f5/f≤0.73; 0.72≤(R9+R10)/(R9−R10)≤1.26; 0.54≤d9≤0.99.

In this embodiment, the object side surface of the sixth lens L6 is a concave surface relative to the proximal axis, its image side surface is a convex surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the sixth lens L6 is f6, the curvature radius of the object side surface of the sixth lens L6 is R11, the curvature radius of the image side surface of the sixth lens L6 is R12 and the thickness on-axis of the sixth lens L6 is d11, they satisfy the condition: −58.49≤f6/f≤−3.35, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −11.33≤(R11+R12)/(R11−R12)≤−0.85 fixes the shape of the sixth lens L6, when beyond this range, with the development into the direction of ultra thin and wide-angle lenses, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.21≤d11 ≤0.79, is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be met, −36.55≤f6/f≤−4.19; −7.08≤(R11+R12)/(R11−R12)≤−1.06; 0.34≤d11≤0.63.

In this embodiment, the object side surface of the seventh lens L7 is a concave surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the seventh lens L7 is f7 and the thickness on-axis of the seventh lens L7 is d13, they satisfy the condition −1.03≤f7/f≤−0.28, appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; when the condition 0.13≤d13≤0.38 is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be met, −0.64≤f7/f≤−0.36; 0.2≤d13≤0.3.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.72 mm, it is beneficial for the realization of ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.46.

In this embodiment, the aperture F number of the camera optical lens 10 is less than or equal to 1.83. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 1.80.

With such design, the total optical length TTL of the whole camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

In the following, an example will be used to describe the camera optical lens 10 of the present invention. The symbols recorded in each example are as follows. The unit of distance, radius and center thickness is mm.

TTL: Optical length (the distance on-axis from the object side surface to the image surface of the first lens L1);

Preferably, inflexion points and/or arrest points can also be arranged on the object side surface and/or image side surface of the lens, so that the demand for high quality imaging can be met, the description below can be referred for specific implementable scheme.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the following, the unit of the focal length, distance, radius and center thickness is mm.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the tables 1 and 2.

TABLE 1

R
d
nd
νd

S1
∞
d0=
−0.232

R1
2.214
d1=
0.650
nd1
1.5462
ν1
55.95

R2
25.218
d2=
0.040

R3
4.199
d3=
0.266
nd2
1.6580
ν2
21.49

R4
2.646
d4=
0.518

R5
−5.060
d5=
0.332
nd3
1.6580
ν3
21.49

R6
−7.170
d6=
0.036

R7
10.564
d7=
0.515
nd4
1.5462
ν4
55.95

R8
−32.568
d8=
0.466

R9
−57.468
d9=
0.676
nd5
1.5462
ν5
55.95

R10
−1.353
d10=
0.055

R11
−13.307
d11=
0.426
nd6
1.7274
ν6
24.59

R12
−109.750
d12=
0.352

R13
−5.062
d13=
0.252
nd7
1.7273
ν7
51.31

R14
2.236
d14=
0.500

R15
∞
d15=
0.210
ndg
1.5187
νg
64.17

R16
∞
d16=
0.329

In which, the meaning of the various symbols is as follows.

S1: Aperture;

R: The curvature radius of the optical surface, the central curvature radius in case of lens;

R1: The curvature radius of the object side surface of the first lens L1;

R2: The curvature radius of the image side surface of the first lens L1;

R3: The curvature radius of the object side surface of the second lens L2;

R4: The curvature radius of the image side surface of the second lens L2;

R5: The curvature radius of the object side surface of the third lens L3;

R6: The curvature radius of the image side surface of the third lens L3;

R7: The curvature radius of the object side surface of the fourth lens L4;

R8: The curvature radius of the image side surface of the fourth lens L4;

R9: The curvature radius of the object side surface of the fifth lens L5;

R10: The curvature radius of the image side surface of the fifth lens L5;

R11: The curvature radius of the object side surface of the sixth lens L6;

R12: The curvature radius of the image side surface of the sixth lens L6;

R13: The curvature radius of the object side surface of the seventh lens L7;

R14: The curvature radius of the image side surface of the seventh lens L7;

R15: The curvature radius of the object side surface of the optical filter GF;

R16: The curvature radius of the image side surface of the optical filter GF;

d: The thickness on-axis of the lens and the distance on-axis between the lens;

d0: The distance on-axis from aperture S1 to the object side surface of the first lens L1;

d1: The thickness on-axis of the first lens L1;

d2: The distance on-axis from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: The thickness on-axis of the second lens L2;

d4: The distance on-axis from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: The thickness on-axis of the third lens L3;

d6: The distance on-axis from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: The thickness on-axis of the fourth lens L4;

d8: The distance on-axis from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: The thickness on-axis of the fifth lens L5;

d10: The distance on-axis from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: The thickness on-axis of the sixth lens L6;

d12: The distance on-axis from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

d13: The thickness on-axis of the seventh lens L7;

d14: The distance on-axis from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

d15: The thickness on-axis of the optical filter GF;

d16: The distance on-axis from the image side surface to image surface of the optical filter GF;

nd: The refractive power of the d line;

nd1: The refractive power of the d line of the first lens L1;

nd2: The refractive power of the d line of the second lens L2;

nd3: The refractive power of the d line of the third lens L3;

nd4: The refractive power of the d line of the fourth lens L4;

nd5: The refractive power of the d line of the fifth lens L5;

nd6: The refractive power of the d line of the sixth lens L6;

nd7: The refractive power of the d line of the seventh lens L7;

ndg: The refractive power of the d line of the optical filter GF;

vd: The abbe number;

v1: The abbe number of the first lens L1;

v2: The abbe number of the second lens L2;

v3: The abbe number of the third lens L3;

v4: The abbe number of the fourth lens L4;

v5: The abbe number of the fifth lens L5;

v6: The abbe number of the sixth lens L6;

v7: The abbe number of the seventh lens L7;

vg: The abbe number of the optical filter GF;

Table 2 shows the aspherical surface data of the camera optical lens 10 in the embodiment 1 of the present invention.

TABLE 2

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−1.2845E−01
1.1069E−02
−8.3201E−04
9.6461E−05
1.5351E−03
2.8998E−04
−7.7020E−04
1.3623E−04

R2
−9.9002E+01
−1.0732E−02
2.0569E−03
−2.6831E−04
2.7344E−04
5.6562E−04
6.7916E−04
−1.4652E−03

R3
−2.1613E+01
−3.4435E−02
−1.0181E−02
6.9613E−03
−1.5043E−04
3.1532E−03
4.4084E−04
−2.7602E−03

R4
−8.0647E+00
−1.4206E−02
−1.8973E−02
−2.1084E−03
−2.2059E−03
3.2003E−03
2.6172E−03
−5.0175E−03

R5
1.4526E+01
−3.3381E−02
−3.8433E−02
−3.2721E−02
7.3435E−03
8.5875E−03
−9.3873E−03
4.5240E−03

R6
2.5506E+01
−1.6137E−02
−3.9031E−02
7.1882E−03
7.4171E−03
−5.3160E−04
−1.5983E−03
9.3548E−04

R7
3.0306E+01
−5.1769E−02
1.2798E−02
1.3267E−03
1.6598E−04
9.9572E−05
−6.2882E−05
4.9487E−05

R8
−9.8995E+01
−6.8421E−02
2.4199E−03
2.6375E−03
−1.9047E−04
−2.8132E−04
4.4739E−05
1.6304E−04

R9
−6.5117E+01
−4.0552E−02
1.3452E−03
1.4632E−04
−1.1344E−03
1.3241E−04
8.6931E−05
−5.8684E−06

R10
−3.7530E+00
−3.4390E−02
1.7574E−02
−1.0902E−03
−4.2748E−04
−2.1040E−05
1.2802E−05
−6.8106E−07

R11
4.9875E+00
−1.4565E−02
−1.4465E−04
3.4410E−04
5.1104E−07
−3.3794E−05
2.8406E−07
1.0508E−06

R12
−9.9000E+01
−8.7542E−03
1.3625E−04
7.4890E−05
7.7242E−06
−7.5005E−07
−1.0891E−07
2.4114E−08

R13
1.1723E+00
−3.6177E−03
2.3234E−03
4.1545E−05
−1.3843E−05
−1.1074E−06
−1.3045E−08
1.2793E−08

R14
−1.4090E+01
−2.5500E−02
4.2959E−03
−5.1245E−04
2.0211E−05
1.1157E−06
1.5151E−08
−1.1501E−08

Among them, K is a conic index, A4, A6, A8, A10, A12, A14, A16 are aspheric surface indexes.

IH: Image Height

y=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶ (1)

For convenience, the aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (1). However, the present invention is not limited to the aspherical polynomials form shown in the condition (1).

Table 3 and table 4 show the inflexion points and the arrest point design data of the camera optical lens 10 lens in embodiment 1 of the present invention. In which, R1 and R2 represent respectively the object side surface and image side surface of the first lens L1, R3 and R4 represent respectively the object side surface and image side surface of the second lens L2, R5 and R6 represent respectively the object side surface and image side surface of the third lens L3, R7 and R8 represent respectively the object side surface and image side surface of the fourth lens L4, R9 and R10 represent respectively the object side surface and image side surface of the fifth lens L5, R11 and R12 represent respectively the object side surface and image side surface of the sixth lens L6, R13 and R14 represent respectively the object side surface and image side surface of the seventh lens L7. The data in the column named “inflexion point position” are the vertical distances from the inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” are the vertical distances from the arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3

Inflexion
Inflexion
Inflexion

point number
point position 1
point position 2

R1

R2
1
0.585

R3
1
0.565

R4
1
0.685

R5

R6

R7
2
0.435
0.985

R8
1
1.255

R9
1
1.595

R10
2
1.185
1.555

R11
1
1.985

R12
1
2.015

R13
2
1.555
2.595

R14
1
0.715

TABLE 4

Arrest point
Arrest point
Arrest point

number
position 1
position 2

R1

R2
1
0.995

R3
1
1.035

R4
1
1.035

R5

R6

R7
2
0.865
1.075

R8
1
1.445

R9

R10

R11

R12
1
2.435

R13

R14
1
1.655

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 435.8 nm, 486.1 nm, 546.1, 587.6 and 656.3 nm passes the camera optical lens 10 in the first embodiment. FIG. 4 shows the field curvature and distortion schematic diagrams after light with a wavelength of 546.1 nm passes the camera optical lens 10 in the first embodiment, the field curvature dotted line in FIG. 4 is a field curvature in the sagittal direction, solid line is field curvature in the meridian direction.

Table 13 shows the various values of the embodiments 1, 2, 3 and the values corresponding with the parameters which are already specified in the conditions.

As shown in Table 13, the first embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 2.332 mm, the full vision field image height is 3.475 mm, the vision field angle in the diagonal direction is 79.17°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

Table 5 and table 6 show the design data of the camera optical lens 20 in embodiment 2 of the present invention.

TABLE 5

R
d
nd
νd

S1
∞
d0=
−0.232

R1
2.175
d1 =
0.651
nd1
1.5462
ν1
55.95

R2
20.882
d2=
0.040

R3
5.052
d3=
0.259
nd2
1.6580
ν2
21.49

R4
3.195
d4=
0.532

R5
−5.526
d5=
0.370
nd3
1.6580
ν3
21.49

R6
−7.081
d6=
0.053

R7
16.777
d7=
0.547
nd4
1.5462
ν4
55.95

R8
16.618
d8=
0.318

R9
38.444
d9=
0.726
nd5
1.5462
ν5
55.95

R10
−1.339
d10=
0.071

R11
−18.560
d11=
0.499
nd6
1.8498
ν6
21.50

R12
−123.128
d12=
0.351

R13
−5.038
d13=
0.252
nd7
1.7272
ν7
44.96

R14
2.291
d14=
0.500

R15
∞
d15=
0.210
ndg
1.5187
νg
64.17

R16
∞
d16=
0.336

Table 6 shows the aspherical surface data of each lens of the camera optical lens 20 in embodiment 2 of the present invention.

TABLE 6

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−2.1132E−01
1.0084E−02
−2.4606E−03
2.2641E−04
8.9506E−04
−1.2551E−05
−6.9273E−04
−7.3231E−05

R2
−9.9000E+01
−2.4047E−02
4.6405E−03
−5.8359E−04
6.7982E−04
−2.7332E−04
−9.7413E−04
−1.7967E−04

R3
−3.1913E+01
−3.6663E−02
−6.7834E−03
1.0294E−02
−1.6969E−03
1.4451E−03
7.3953E−04
−1.8146E−03

R4
−1.0455E+01
−1.5905E−02
−1.4859E−02
−5.1867E−04
−4.2187E−03
9.4987E−04
2.9379E−03
−3.2969E−03

R5
1.6933E+01
−4.5383E−02
−3.2029E−02
−3.6450E−02
4.9818E−03
8.5719E−03
−9.0242E−03
6.4276E−03

R6
2.7836E+01
−1.3708E−02
−3.7733E−02
8.7797E−03
7.0505E−03
−1.6893E−03
−1.6308E−03
1.5618E−03

R7
8.5187E+01
−5.0410E−02
1.3825E−02
1.3968E−03
−4.5118E−05
−2.3470E−04
−2.1550E−04
1.2947E−04

R8
−9.9007E+01
−7.3895E−02
1.5392E−03
2.6976E−03
−1.7479E−04
−3.4985E−04
−3.7880E−05
1.0999E−04

R9
−3.9797E+01
−4.1540E−02
9.0496E−04
−1.0216E−04
−1.1980E−03
1.2770E−04
8.9696E−05
−6.0728E−06

R10
−3.4378E+00
−3.5412E−02
1.7915E−02
−1.0401E−03
−4.4103E−04
−2.9451E−05
1.0657E−05
−4.7659E−07

R11
1.2785E+01
−1.4750E−02
−2.7537E−04
3.5224E−04
7.1196E−06
−3.2592E−05
2.8202E−07
9.5215E−07

R12
−9.7010E+01
−8.7027E−03
1.2881E−04
7.0469E−05
6.9618E−06
−8.1808E−07
−1.0950E−07
2.5627E−08

R13
1.1654E+00
−3.6683E−03
2.3367E−03
4.3727E−05
−1.3715E−05
−1.1251E−06
−1.9661E−08
1.1416E−08

R14
−1.3785E+01
−2.4617E−02
4.3286E−03
−5.1463E−04
1.9923E−05
1.0944E−06
1.4410E−08
−1.1429E−08

Table 7 and table 8 show the inflexion points and the arrest point design data of the camera optical lens 20 lens in embodiment 2 of the present invention.

TABLE 7

Inflexion
Inflexion
Inflexion

point number
point position 1
point position 2

R1
1
1.175

R2
1
0.415

R3
1
0.535

R4
1
0.675

R5

R6
1
1.175

R7
2
0.345
1.065

R8
2
0.265
1.365

R9
2
0.235
1.635

R10
2
1.205
1.495

R11
1
1.995

R12
1
2.055

R13
2
1.555
2.485

R14
1
0.735

TABLE 8

Arrest point
Arrest point
Arrest point

number
position 1
position 2

R1

R2
1
0.745

R3
1
1.035

R4
1
1.025

R5

R6

R7
2
0.615
1.285

R8
1
0.445

R9
1
0.395

R10

R11

R12
1
2.475

R13

R14
1
1.715

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 435.8 nm, 486.1 nm and 546.1 nm, 587.6 and 656.3 nm passes the camera optical lens 20 in the second embodiment. FIG. 8 shows the field curvature and distortion schematic diagrams after light with a wavelength of 546.1 nm passes the camera optical lens 20 in the second embodiment.

As shown in Table 13, the second embodiment satisfies the various condition expressions.

In this embodiment, the pupil entering diameter of the camera optical lens is 2.328 mm, the full vision field image height is 3.475 mm, the vision field angle in the diagonal direction is 79.27°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

The design information of the camera optical lens 30 in the third embodiment of the present invention is shown in the tables 9 and 10.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.232

R1
2.137
d1 =
0.650
nd1
1.5462
ν1
55.95

R2
18.865
d2=
0.039

R3
5.442
d3=
0.248
nd2
1.6580
ν2
21.49

R4
3.312
d4=
0.536

R5
−6.212
d5=
0.359
nd3
1.6580
ν3
21.49

R6
−6.990
d6=
0.073

R7
18.417
d7=
0.495
nd4
1.5462
ν4
55.95

R8
14.115
d8=
0.329

R9
25.710
d9=
0.828
nd5
1.5462
ν5
55.95

R10
−1.283
d10=
0.073

R11
−34.733
d11=
0.529
nd6
1.9809
ν6
21.50

R12
−49.621
d12=
0.288

R13
−5.06E+00
d13=
0.252
nd7
1.9185
ν7
39.33

R14
2.42E+00
d14=
0.500

R15
∞
d15=
0.210
ndg
1.5187
νg
64.17

R16
∞
d16=
0.305

Table 10 shows the aspherical surface data of each lens of the camera optical lens 30 in embodiment 3 of the present invention.

TABLE 10

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−2.3988E−01
9.3128E−03
−1.6168E−03
−2.0844E−05
4.6931E−04
6.5313E−05
−4.9475E−04
−2.7008E−04

R2
−9.8918E+01
−2.9477E−02
8.4744E−03
−1.3128E−03
2.8281E−04
−6.6463E−04
−1.6211E−03
3.3495E−04

R3
−3.9389E+01
−3.9652E−02
−4.3983E−03
1.3443E−02
−2.7626E−03
−2.3218E−04
6.9070E−04
−1.0637E−03

R4
−1.1599E+01
−1.3945E−02
−1.1663E−02
−2.9909E−04
−4.1287E−03
9.9685E−04
3.0646E−03
−3.2158E−03

R5
1.9676E+01
−4.9976E−02
−3.0746E−02
−3.7877E−02
6.0405E−03
7.6657E−03
−1.1833E−02
8.3377E−03

R6
2.7849E+01
−1.2528E−02
−3.8244E−02
8.9960E−03
6.7476E−03
−2.2807E−03
−1.9567E−03
2.0608E−03

R7
8.1727E+01
−5.0064E−02
1.3214E−02
9.2451E−04
−2.6624E−04
−1.4641E−04
−1.3196E−04
1.1051E−04

R8
−9.9013E+01
−7.4498E−02
1.5592E−03
2.7059E−03
−1.6905E−04
−3.5079E−04
−3.6423E−05
1.1382E−04

R9
6.6217E+01
−4.1020E−02
1.1655E−03
−1.9487E−05
−1.1606E−03
1.3354E−04
8.8346E−05
−8.2230E−06

R10
−3.5310E+00
−3.5897E−02
1.7734E−02
−1.0928E−03
−4.5714E−04
−3.2803E−05
1.0741E−05
−2.6329E−07

R11
5.5594E+01
−1.5724E−02
−3.6779E−04
3.4541E−04
6.6085E−06
−3.2998E−05
1.2035E−07
9.0091E−07

R12
−7.4444E+01
−8.5032E−03
1.3527E−04
6.9666E−05
6.6430E−06
−8.8761E−07
−1.2000E−07
2.4997E−08

R13
1.1839E+00
−3.8783E−03
2.3317E−03
4.3978E−05
−1.3667E−05
−1.1329E−06
−2.2779E−08
1.0462E−08

R14
−1.8055E+01
−2.4347E−02
4.3695E−03
−5.1301E−04
1.9922E−05
1.0842E−06
1.2837E−08
−1.1436E−08

Table 11 and table 12 show the inflexion points and the arrest point design data of the camera optical lens 30 lens in embodiment 3 of the present invention.

TABLE 11

Inflexion
Inflexion
Inflexion

point number
point position 1
point position 2

R1
1
1.155

R2
1
0.405

R3
1
0.515

R4
1
0.695

R5

R6
1
1.175

R7
2
0.325
1.135

R8
2
0.275
1.355

R9
2
0.285
1.645

R10
2
1.235
1.425

R11
1
2.055

R12
1
2.095

R13
2
1.565
2.425

R14
1
0.695

TABLE 12

Arrest point
Arrest point
Arrest point

number
position 1
position 2

R1

R2
1
0.725

R3
1
1.025

R4
1
1.045

R5

R6

R7
2
0.575
1.345

R8
1
0.475

R9
1
0.495

R10

R11

R12
1
2.525

R13

R14
1
1.635

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 435.8 nm, 486.1 nm, 546.1, 587.6 and 656.3 nm passes the camera optical lens 30 in the third embodiment. FIG. 12 shows the field curvature and distortion schematic diagrams after light with a wavelength of 546.1 nm passes the camera optical lens 30 in the third embodiment.

The following table 13, in accordance with the above condition expressions, lists the values in this embodiment corresponding with each condition. Apparently, the camera optical system of this embodiment satisfies the above conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 2.308 mm, the full vision field image height is 3.475 mm, the vision field angle in the diagonal direction is 79.75°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

TABLE 13

Embodi-
Embodi-
Embodi-

ment 1
ment 2
ment 3

f
4.152
4.143
4.108

f1
4.400
4.390
4.353

f2
−11.667
−13.989
−13.486

f3
−27.873
−42.246
−103.718

f4
14.665
14972.069
−115.310

f5
2.526
2.384
2.261

f6
−20.857
−25.774
−120.130

f7
−2.102
−2.135
−1.752

f3/f4
−1.901
−0.003
0.899

(R1 + R2)/(R1 − R2)
−1.193
−1.233
−1.256

(R3 + R4)/(R3 − R4)
4.408
4.442
4.111

(R5 + R6)/(R5 − R6)
−5.796
−8.109
−16.956

(R7 + R8)/(R7 − R8)
−0.510
209.964
7.562

(R9 + R10)/(R9 − R10)
1.048
0.933
0.905

(R11 + R12)/(R11 − R12)
−1.276
−1.355
−5.666

(R13 + R14)/(R13 − R14)
0.387
0.375
0.353

f1/f
1.060
1.060
1.060

f2/f
−2.810
−3.376
−3.283

f3/f
−6.714
−10.197
−25.248

f4/f
3.532
3613.686
−28.069

f5/f
0.609
0.575
0.551

f6/f
−5.024
−6.221
−29.243

f7/f
−0.506
−0.515
−0.427

d1
0.650
0.651
0.650

d3
0.266
0.259
0.248

d5
0.332
0.370
0.359

d7
0.515
0.547
0.495

d9
0.676
0.726
0.828

d11
0.426
0.499
0.529

d13
0.252
0.252
0.252

Fno
1.780
1.780
1.780

TTL
5.083
5.168
5.200

d7/TTL
0.101
0.106
0.095

n1
1.5462
1.5462
1.5462

n2
1.6580
1.6580
1.6580

n3
1.6580
1.6580
1.6580

n4
1.5462
1.5462
1.5462

n5
1.5462
1.5462
1.5462

n6
1.7274
1.8498
1.9809

n7
1.7273
1.7272
1.9185

It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.

Number	Date	Country	Kind
201710975233.7	Oct 2017	CN	national
201710975262.3	Oct 2017	CN	national

Camera Optical Lens

Information

Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (2)