Camera Optical Lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Applications Ser. No. 201810924553.4 and Ser. No. 201810924591.X filed on Aug. 14, 2018, 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 presents the longitudinal aberration of the camera optical lens shown in FIG. 1;

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

FIG. 4 presents 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 six 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, and a sixth lens L6. Optical element like optical filter GF can be arranged between the sixth lens L6 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 glass material, and the sixth lens L6 is made of glass material.

The second lens L2 has a positive refractive power, and the third lens L3 has a positive refractive power.

Here, the focal length of the whole camera optical lens 10 is defined as f, the focal length of the first lens is defined as f1. The camera optical lens 10 further satisfies the following condition: −3≤f1/f≤−2. Condition −3≤f1/f≤−1 fixes the negative refractive power of the first lens L1. If the upper limit of the set value is exceeded, although it benefits the ultra-thin development of lenses, but the negative 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 lower limit of the set value is exceeded, the negative refractive power of the first lens L1 becomes too weak, it is then difficult to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, −2.982≤f1/f≤−2.071.

The refractive index of the fifth lens L5 is defined as n5. Here the following condition should be satisfied: 1.7≤n5≤2.2. This condition fixes the refractive index of the fifth lens L5, and refractive index within this range benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.709≤n2≤2.047.

The refractive index of the sixth lens L6 is defined as n6. Here the following condition should be satisfied: 1.7≤n6≤2.2. This condition fixes the refractive index of the sixth lens L6, and refractive index within this range benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.71≤n6≤2.042.

The thickness on-axis of the fifth lens L5 is defined as d9, the total distance from the object side surface of the first lens to the image plane along the optic axis is defined as TTL. Here the following condition should be satisfied: 0.065≤d9/TTL≤0.09. This condition fixes the ratio between the thickness on-axis of the fifth lens L5 and the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the camera optical lens 10, a ratio within this range can benefits for realization of the ultra-thin lens. Preferably, the condition 0.066≤d9/TTL≤0.082 shall be satisfied.

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 first lens L1 has a negative refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The curvature radius of the object side surface of the first lens L1 is defined as R1, the curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens 10 further satisfies the following condition: 3.19≤(R1+R2)/(R1−R2)≤11.28, by which, the shape of the first lens L1 can be reasonably controlled and it is effectively for correcting spherical aberration of the camera optical lens. Preferably, the condition 5.10≤(R1+R2)/(R1−R2)≤9.03 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.02≤d1/TTL≤0.07 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.04≤d1/TTL≤0.05 shall be satisfied.

In this embodiment, the second lens L2 has a positive refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2. The following condition should be satisfied: 0.42≤f2/f≤1.41. The positive refractive power of the second lens L2 within this range can be reasonably controlled, which can properly and effectively balance the field curvature of the system and the spherical aberration caused by the negative refractive power of the first lens L1. Preferably, the condition 0.67≤f2/f≤1.13 should be satisfied.

The curvature radius of the object side surface of the second lens L2 is defined as R3, the curvature radius of the image side surface of the second lens L2 is defined as R4. The following condition should be satisfied: −2.99≤(R3+R4)/(R3−R4)≤−0.85, which fixes the shape of the second lens L2 and when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like chromatic aberration of the on-axis is difficult to be corrected. Preferably, the following condition shall be satisfied, −1.87≤(R3+R4)/(R3−R4)≤−1.07.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.05≤d3/TTL≤0.16 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.08≤d3/TTL≤0.13 shall be satisfied.

In this embodiment, the third lens L3 has a positive refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the third lens L3 is f3. The following condition should be satisfied: 1.53≤f3/f≤5.08. When the condition is satisfied, it is beneficial for the system to balance field curvature and further enhance the imaging quality. Preferably, the condition 2.44≤f3/f≤4.07 should be satisfied.

The curvature radius of the object side surface of the third lens L3 is defined as R5, the curvature radius of the image side surface of the third lens L3 is defined as R6. The following condition should be satisfied: −15.5≤(R5+R6)/(R5−R6)≤−4.06, by which, the shape of the third lens L3 can be effectively controlled and it is beneficial for shaping of the third lens L3, further, it also can avoid bad molding and stress caused by the excessive curvature of the third lens L3. Preferably, the following condition shall be satisfied, −9.69≤(R5+R5)/(R5−R6)≤−5.07.

The thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.03≤d5/TTL≤0.08 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.04≤d5/TTL≤0.07 shall be satisfied.

In this embodiment, the fourth lens L4 has a positive refractive power with a concave object side surface relative to the proximal axis and a convex image side 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 following condition should be satisfied: 0.98≤f4/f≤3.14, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity. Preferably, the condition 1.56≤f4/f≤2.51 should be satisfied.

The curvature radius of the object side surface of the fourth lens L4 is defined as R7, the curvature radius of the image side surface of the fourth lens L4 is defined as R8. The following condition should be satisfied: 1.21≤(R7+R8)/(R7−R8)≤4.11, by which, the shape of the fourth lens L4 is fixed, further, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, 1.93≤(R7+R8)/(R7−R8)≤3.29.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.04≤d7/TTL≤0.12 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.06≤d7/TTL≤0.10 shall be satisfied.

In this embodiment, the fifth lens L5 has a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the fifth lens L5 is f5. The following condition should be satisfied: −13.04≤f5/f≤5.25, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition −8.15≤f5/f≤−4.20 should be satisfied.

The curvature radius of the object side surface of the fifth lens L5 is defined as R9, the curvature radius of the image side surface of the fifth lens L5 is defined as R10. The following condition should be satisfied: −21.29≤(R9+R10)/(R9−R10)≤682.32, by which, the shape of the fifth lens L5 is fixed, further, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, −13.31≤(R9+R10)/(R9−R10)≤545.85.

In this embodiment, the sixth lens L6 has a negative refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the sixth lens L6 is f6. The following condition should be satisfied: −4.09≤f6/f≤−0.63, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity. Preferably, the condition −2.56≤f6/f≤−0.79 should be satisfied.

The curvature radius of the object side surface of the sixth lens L6 is defined as R11, the curvature radius of the image side surface of the sixth lens L6 is defined as R12. The following condition should be satisfied: 1.04≤(R11+R12)/(R11−R12)≤5.51, by which, the shape of the sixth lens L6 is fixed, further, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, 1.66≤(R11+R12)/(R11−R12)≤4.41.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.09≤d11/TTL≤0.33 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.14≤d11/TTL≤0.26 shall be satisfied.

The focal length of the whole camera optical lens 10 is f, the combined focal length of the first lens L1 and the second lens L2 is f12. The following condition should be satisfied: 0.73≤f12/f≤2.42, which can effectively avoid the aberration and field curvature of the camera optical lens, suppress the rear focal length for realizing the ultra-thin lens, and maintain the miniaturization of lens system. Preferably, the condition 1.17≤f12/f≤1.93 should be satisfied.

In this embodiment, the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the camera optical lens 10 is less than or equal to 5.17 mm, it is beneficial for the realization of ultra-thin lenses. Preferably, the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the camera optical lens 10 is less than or equal to 4.94 mm.

In this embodiment, the camera optical lens 10 is large aperture and the aperture F number of the camera optical lens 10 is less than or equal to 2.27. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 2.22.

With such design, the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the whole camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

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

TTL: Optical length (the total distance from the object side surface of the first lens to the image plane along the optic axis).

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

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

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

TABLE 1

R
d
nd
νd

S1
∞
d0=
−0.120

R1
1.603
d1=
0.215
nd1
1.671
ν1
19.243

R2
1.169
d2=
0.049

R3
1.464
d3=
0.491
nd2
1.545
ν2
55.987

R4
9.160
d4=
0.193

R5
1.824
d5=
0.244
nd3
1.545
ν3
55.987

R6
2.365
d6=
0.387

R7
−5.042
d7=
0.386
nd4
1.535
ν4
56.093

R8
−2.345
d8=
0.468

R9
−1.124
d9=
0.308
nd5
1.717
ν5
29.518

R10
−1.119
d10=
0.030

R11
4.101
d11=
0.840
nd6
1.720
ν6
41.978

R12
1.437
d12=
0.778

R13
∞
d13=
0.210
ndg
1.517
νg
64.167

R14
∞
d14=
0.100

Where:

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 optical filter GF;

R14: 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 optical filter GF;

d13: The thickness on-axis of the optical filter GF;

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

nd: The refractive index of the d line;

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

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

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

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

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

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

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

vd: The abbe number;

v1: The abbe number of the first lens 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;

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
−1.4005E+00
−1.1492E−01
5.5012E−02
−7.1817E−02
−1.0883E−02
3.3050E−02
9.4877E−02
−9.5936E−02

R2
−2.1786E+00
−1.3424E−01
2.1067E−01
−2.1005E−01
−2.7235E−01
3.2627E−01
5.1017E−01
−5.3007E−01

R3
8.4595E−01
−1.7279E−01
1.9664E−01
−2.1678E−01
−1.6505E−01
1.5636E−01
3.2518E−01
−2.4078E−01

R4
9.9289E+01
−1.6840E−01
1.1171E−01
−3.3493E−02
−1.3093E−02
−8.3351E−02
−3.8804E−02
1.6764E−01

R5
−1.8662E+00
−1.7699E−01
3.8849E−03
−5.7359E−02
1.1689E−01
−1.4226E−03
−3.5263E−01
2.9276E−01

R6
−1.2569E+00
−9.2706E−02
−1.1367E−01
1.5959E−03
9.1796E−02
−9.6056E−02
−6.5483E−02
5.9871E−02

R7
0.0000E+00
−9.3861E−02
−1.0901E−02
−9.9532E−02
−2.2317E−02
5.1300E−02
−2.9424E−03
−1.7823E−02

R8
3.1074E+00
−7.3591E−02
4.4058E−03
3.5616E−03
−3.5857E−02
3.1437E−03
1.4825E−02
1.4970E−02

R9
−3.8102E+00
−1.1642E−01
−1.2906E−02
−3.6200E−02
7.3947E−03
5.7037E−03
−8.2539E−03
5.2586E−03

R10
−3.5187E+00
−2.1289E−02
−2.6800E−02
6.6462E−03
3.3715E−03
1.1884E−03
2.6359E−04
−3.3215E−04

R11
−2.0833E+01
−9.6728E−02
2.0585E−02
−1.1680E−05
−1.2882E−04
−4.6185E−05
−1.7921E−05
4.2426E−06

R12
−9.2668E+00
−4.2666E−02
9.0567E−03
−1.6863E−03
1.3801E−04
1.5131E−06
−5.6884E−07
−4.4334E−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, P1R1 and P1R2 represent respectively the object side surface and image side surface of the first lens L1, P2R1 and P2R2 represent respectively the object side surface and image side surface of the second lens L2, P3R1 and P3R2 represent respectively the object side surface and image side surface of the third lens L3, P4R1 and P4R2 represent respectively the object side surface and image side surface of the fourth lens L4, P5R1 and P5R2 represent respectively the object side surface and image side surface of the fifth lens L5, P6R1 and P6R2 represent respectively the object side surface and image side surface of the sixth lens L6. 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 point
Inflexion point
Inflexion point

number
position 1
position 2

P1R1
1
0.685

P1R2
0

P2R1
0

P2R2
2
0.265
0.765

P3R1
1
0.485

P3R2
1
0.485

P4R1
0

P4R2
1
1.015

P5R1
0

P5R2
1
1.115

P6R1
1
0.425

P6R2
1
0.635

TABLE 4

Arrest
Arrest
Arrest

point number
point position 1
point position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
2
0.495
0.845

P3R1
1
0.805

P3R2
1
0.755

P4R1
0

P4R2
0

P5R1
0

P5R2
0

P6R1
1
0.775

P6R2
1
1.475

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 10 in the first embodiment. FIG. 4 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 10 in the first embodiment, the field curvature S in FIG. 4 is a field curvature in the sagittal direction, T is a field curvature in the meridian direction.

Table 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 1.689 mm, the full vision field image height is 2.933 mm, the vision field angle in the diagonal direction is 76.77°, 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=
−0.120

R1
1.638
d1=
0.215
nd1
1.671
ν1
19.243

R2
1.230
d2=
0.048

R3
1.505
d3=
0.513
nd2
1.545
ν2
55.987

R4
7.573
d4=
0.160

R5
1.853
d5=
0.247
nd3
1.545
ν3
55.987

R6
2.570
d6=
0.367

R7
−5.352
d7=
0.370
nd4
1.535
ν4
56.093

R8
−2.297
d8=
0.389

R9
−1.027
d9=
0.324
nd5
1.808
ν5
22.761

R10
−1.239
d10=
0.030

R11
2.812
d11=
0.962
nd6
1.800
ν6
42.241

R12
1.608
d12=
0.765

R13
∞
d13=
0.210
ndg
1.517
νg
64.167

R14
∞
d14=
0.100

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
−9.9756E−01
−1.1033E−01
5.4919E−02
−7.9131E−02
−3.1721E−02
4.0048E−02
1.1727E−01
−1.0548E−01

R2
−2.0607E+00
−1.2488E−01
2.1319E−01
−2.5450E−01
−2.4864E−01
3.4116E−01
4.0761E−01
−4.3919E−01

R3
8.8296E−01
−1.6464E−01
1.9246E−01
−2.2233E−01
−2.0356E−01
1.5873E−01
4.1523E−01
−3.2579E−01

R4
−1.6717E+02
−1.5410E−01
1.1917E−01
−7.2086E−02
4.2162E−02
−3.0983E−02
−1.0295E−01
1.7409E−01

R5
−2.8276E+00
−1.8258E−01
1.2137E−02
−9.7562E−02
1.6082E−01
3.0722E−02
−2.6458E−01
2.0471E−01

R6
−1.8385E−01
−8.6009E−02
−1.3389E−01
−1.1600E−02
1.5706E−01
−1.0163E−01
−9.5849E−02
9.3618E−02

R7
0.0000E+00
−1.2052E−01
−1.8895E−02
−8.4845E−02
−2.8886E−02
3.9472E−02
3.9442E−02
−1.0322E−02

R8
3.0879E+00
−9.0550E−02
1.4470E−02
3.4935E−03
−2.3427E−02
8.7528E−03
2.1381E−02
1.3000E−02

R9
−4.5167E+00
−6.8858E−02
−1.6350E−02
−1.9231E−02
1.0405E−02
1.0794E−02
−7.8229E−03
−1.6447E−03

R10
−3.6434E+00
−7.5075E−03
−2.2172E−02
5.6992E−03
2.4448E−03
4.4755E−04
2.4277E−04
−2.3639E−04

R11
−2.0981E+01
−1.1080E−01
1.9559E−02
4.9873E−04
3.5770E−05
−4.3537E−05
−2.4189E−05
4.2056E−06

R12
−8.9562E+00
−4.8083E−02
1.0083E−02
−1.7159E−03
1.2379E−04
−7.8441E−07
−3.2965E−07
1.0706E−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

P1R1
1
0.675

P1R2
1
0.675

P2R1
0

P2R2
2
0.255
0.805

P3R1
2
0.465
0.865

P3R2
1
0.475

P4R1
0

P4R2
1
0.965

P5R1
0

P5R2
1
1.135

P6R1
1
0.415

P6R2
1
0.635

TABLE 8

Arrest
Arrest
Arrest

point number
point position 1
point position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
2
0.465
0.895

P3R1
2
0.835
0.885

P3R2
1
0.755

P4R1
0

P4R2
0

P5R1
0

P5R2
0

P6R1
1
0.775

P6R2
1
1.415

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 20 in the second embodiment. FIG. 8 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 20 in the second embodiment.

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

In this embodiment, the pupil entering diameter of the camera optical lens is 1.776 mm, the full vision field image height is 2.933 mm, the vision field angle in the diagonal direction is 79.29°, 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.

FIG. 9 is a schematic diagram of a camera optical lens 30 in accordance with a third embodiment of the present invention.

Table 9 and table 10 show the design data of the camera optical lens 30 in embodiment 3 of the present invention.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.120

R1
1.669
d1=
0.214
nd1
1.661
ν1
20.373

R2
1.277
d2=
0.048

R3
1.594
d3=
0.467
nd2
1.545
ν2
55.987

R4
13.022
d4=
0.179

R5
1.984
d5=
0.263
nd3
1.545
ν3
55.987

R6
2.765
d6=
0.325

R7
−5.421
d7=
0.357
nd4
1.535
ν4
56.093

R8
−2.248
d8=
0.401

R9
−1.000
d9=
0.350
nd5
1.893
ν5
20.362

R10
−1.256
d10=
0.030

R11
3.169
d11=
1.032
nd6
1.883
ν6
40.765

R12
1.780
d12=
0.725

R13
∞
d13=
0.210
ndg
1.517
νg
64.167

R14
∞
d14=
0.100

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
−1.1265E+00
−1.0753E−01
2.6534E−02
−9.4534E−02
−1.7056E−02
6.2685E−02
1.5562E−01
−1.7985E−01

R2
−1.8347E+00
−1.2144E−01
1.8737E−01
−3.2406E−01
−2.2758E−01
4.5330E−01
3.9622E−01
−5.5153E−01

R3
1.1858E+00
−1.3947E−01
1.6632E−01
−2.3260E−01
−2.3168E−01
1.5486E−01
5.0382E−01
−4.0670E−01

R4
1.2494E+02
−2.0300E−01
1.5510E−01
−1.1174E−01
8.1538E−02
−3.0826E−02
−1.6785E−01
2.1525E−01

R5
−2.8979E+00
−1.7324E−01
1.8302E−02
−8.9731E−02
1.5267E−01
4.3495E−02
−2.7533E−01
2.0871E−01

R6
−2.2103E−01
−7.8410E−02
−1.3452E−01
−1.8507E−02
1.5497E−01
−9.7568E−02
−1.3019E−01
1.1038E−01

R7
0.0000E+00
−1.0581E−01
−2.2074E−02
−9.7984E−02
−3.4261E−02
4.8928E−02
4.0350E−02
−3.3322E−02

R8
3.1271E+00
−7.0903E−02
1.8878E−02
1.6980E−03
−2.2692E−02
1.3132E−02
2.5178E−02
1.2705E−02

R9
−4.0242E+00
−9.0104E−02
−3.6147E−03
−2.8971E−02
1.1703E−02
1.2093E−02
−8.6250E−03
−2.9250E−03

R10
−3.0590E+00
−1.2581E−02
−2.2531E−02
6.1207E−03
2.1594E−03
3.2078E−04
1.9510E−04
−1.3071E−04

R11
−2.6204E+01
−1.0433E−01
1.6268E−02
5.0743E−04
7.9586E−05
−4.8036E−05
−2.5712E−05
5.3041E−06

R12
−1.0129E+01
−4.6276E−02
9.9623E−03
−1.8035E−03
1.5045E−04
−1.8407E−06
−6.7241E−07
3.5328E−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

P1R1
1
0.615

P1R2
1
0.615

P2R1
0

P2R2
2
0.195
0.815

P3R1
2
0.465
0.845

P3R2
1
0.465

P4R1
0

P4R2
1
0.955

P5R1
0

P5R2
1
1.165

P6R1
1
0.405

P6R2
1
0.635

TABLE 12

Arrest point number
Arrest point position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.335

P3R1
0

P3R2
1
0.735

P4R1
0

P4R2
0

P5R1
0

P5R2
0

P6R1
1
0.755

P6R2
1
1.395

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 30 in the third embodiment. FIG. 12 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 30 in the third embodiment.

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

In this embodiment, the pupil entering diameter of the camera optical lens is 1.601 mm, the full vision field image height is 2.933 mm, the vision field angle in the diagonal direction is 79.90°, 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

Embodiment

Embodiment

1
Embodiment 2
3

f
3.716
3.552
3.522

f1
−7.954
−9.264
−10.438

f2
3.120
3.338
3.277

f3
12.595
10.837
11.498

f4
7.776
7.189
6.882

f5
13.001
−23.160
−15.419

f6
−3.527
−7.269
−7.034

f12
5.648
5.723
5.158

(R1 + R2)/(R1 − R2)
6.379
7.032
7.521

(R3 + R4)/(R3 − R4)
−1.381
−1.496
−1.279

(R5 + R6)/(R5 − R6)
−7.748
−6.168
−6.083

(R7 + R8)/(R7 − R8)
2.739
2.504
2.417

(R9 + R10)/(R9 − R10)
454.877
−10.644
−8.803

(R11 + R12)/(R11 − R12)
2.079
3.673
3.563

f1/f
−2.141
−2.608
−2.963

f2/f
0.840
0.940
0.930

f3/f
3.389
3.051
3.264

f4/f
2.093
2.024
1.954

f5/f
3.499
−6.520
−4.377

f6/f
−0.949
−2.046
−1.997

f12/f
1.520
1.611
1.464

d1
0.215
0.215
0.214

d3
0.491
0.513
0.467

d5
0.244
0.247
0.263

d7
0.386
0.370
0.357

d9
0.308
0.324
0.350

d11
0.840
0.962
1.032

Fno
2.200
2.000
2.200

TTL
4.700
4.700
4.700

d1/TTL
0.046
0.046
0.046

d3/TTL
0.104
0.109
0.099

d5/TTL
0.052
0.053
0.056

d7/TTL
0.082
0.079
0.076

d9/TTL
0.066
0.069
0.074

d11/TTL
0.179
0.205
0.219

n1
1.671
1.671
1.661

n2
1.545
1.545
1.545

n3
1.545
1.545
1.545

n4
1.535
1.535
1.535

n5
1.717
1.808
1.893

n6
1.720
1.800
1.883

v1
19.243
19.243
20.373

v2
55.987
55.987
55.987

v3
55.987
55.987
55.987

v4
56.093
56.093
56.093

v5
29.518
22.761
20.362

v6
41.978
42.241
40.765

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.

Claims

1. A camera optical lens comprising, from an object side to an image side in sequence: a first lens, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens, a fifth lens, and a sixth lens; wherein the camera optical lens further satisfies the following conditions: −3≤f1/f≤−2;1.7≤n5≤2.2;1.7≤n6≤2.2;0.065≤d9/TTL≤0.09; wheref: the focal length of the camera optical lens;f1: the focal length of the first lens;n5: the refractive index of the fifth lens;n6: the refractive index of the sixth lens;d9: the thickness on-axis of the fifth lens;TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.
2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of glass material, the sixth lens is made of glass material.
3. The camera optical lens as described in claim 1 further satisfying the following conditions: −2.982≤f1/f≤−2.071;1.709≤n5≤2.047;1.71≤n6≤2.042;0.066≤d9/TTL≤0.082.
4. The camera optical lens as described in claim 1, wherein first lens has a negative refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 3.19≤(R1+R2)/(R1−R2)≤11.28;0.02≤d1/TTL≤0.07; whereR1: the curvature radius of object side surface of the first lens;R2: the curvature radius of image side surface of the first lens.d1: the thickness on-axis of the first lens;TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.
5. The camera optical lens as described in claim 4 further satisfying the following conditions: 5.10≤(R1+R2)/(R1−R2)≤9.03;0.04≤d1/TTL≤0.05.
6. The camera optical lens as described in claim 1, wherein the second lens has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 0.42≤f2/f≤1.41;−2.99≤(R3+R4)/(R3−R4)≤−0.85;0.05≤d3/TTL≤0.16; wheref: the focal length of the camera optical lens;f2: the focal length of the second lens;R3: the curvature radius of the object side surface of the second lens;R4: the curvature radius of the image side surface of the second lens;d3: the thickness on-axis of the second lens;TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.
7. The camera optical lens as described in claim 6 further satisfying the following conditions: 0.67≤f2/f≤1.13;−1.87≤(R3+R4)/(R3−R4)≤−1.07;0.08≤d3/TTL≤0.13.
8. The camera optical lens as described in claim 1, wherein the third lens has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 1.53≤f3/f≤5.08;−15.5≤(R5+R6)/(R5−R6)≤−4.06;0.03≤d5/TTL≤0.08; wheref: the focal length of the camera optical lens;f3: the focal length of the third lens;R5: the curvature radius of the object side surface of the third lens;R6: the curvature radius of the image side surface of the third lens;d5: the thickness on-axis of the third lens;TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.
9. The camera optical lens as described in claim 8 further satisfying the following conditions: 2.44≤f3/f≤4.07;−9.69≤(R5+R6)/(R5−R6)≤−5.07;0.04≤d5/TTL≤0.07.
10. The camera optical lens as described in claim 1, wherein the fourth lens has a positive refractive power with a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 0.98≤f4/f≤3.14;1.21≤(R7+R8)/(R7−R8)≤4.11;0.04≤d7/TTL≤0.12; wheref: the focal length of the camera optical lens;f4: the focal length of the fourth lens;R7: the curvature radius of the object side surface of the fourth lens;R8: the curvature radius of the image side surface of the fourth lens;d7: the thickness on-axis of the fourth lens;TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.
11. The camera optical lens as described in claim 10 further satisfying the following conditions: 1.56≤f4/f≤2.51;1.93≤(R7+R8)/(R7−R8)≤3.29;0.06≤d7/TTL≤0.10.
12. The camera optical lens as described in claim 1, wherein the fifth lens has a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: −13.04≤f5/f≤5.25;−21.29≤(R9+R10)/(R9−R10)≤682.32; wheref: the focal length of the camera optical lens;f5: the focal length of the fifth lens;R9: the curvature radius of the object side surface of the fifth lens;R10: the curvature radius of the image side surface of the fifth lens.
13. The camera optical lens as described in claim 12 further satisfying the following conditions: −8.15≤f5/f≤4.20;−13.31≤(R9+R10)/(R9−R10)≤545.85.
14. The camera optical lens as described in claim 1, wherein the sixth lens has a negative refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: −4.09≤f6/f≤−0.63;1.04≤(R11+R12)/(R11−R12)≤5.51;0.09≤d11/TTL≤0.33; wheref: the focal length of the camera optical lens;f6: the focal length of the sixth lens;R11: the curvature radius of the object side surface of the sixth lens;R12: the curvature radius of the image side surface of the sixth lens;d11: the thickness on-axis of the sixth lens;TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.
15. The camera optical lens as described in claim 14 further satisfying the following conditions: −2.56≤f6/f≤−0.79;1.66≤(R11+R12)/(R11−R12)≤4.41;0.14≤d11/TTL≤0.26.
16. The camera optical lens as described in claim 1 further satisfying the following condition: 0.73≤f12/f≤2.42; wheref12: the combined focal length of the first lens and the second lens;f: the focal length of the camera optical lens.
17. The camera optical lens as described in claim 16 further satisfying the following condition: 1.17≤f12/f≤1.93.
18. The camera optical lens as described in claim 1, wherein the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the camera optical lens is less than or equal to 5.17 mm.
19. The camera optical lens as described in claim 18, wherein the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the camera optical lens is less than or equal to 4.94 mm.
20. The camera optical lens as described in claim 1, wherein the aperture F number of the camera optical lens is less than or equal to 2.27.

Priority Claims (2)

Number	Date	Country	Kind
201810924553.4	Aug 2018	CN	national
201810924591.X	Aug 2018	CN	national

Camera Optical Lens

Information

Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (2)