Camera optical lens including six lenses of +-+-+- refractive powers

Description

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, in particular, to a camera optical lens suitable for handheld devices, such as smart phones and digital cameras, and imaging devices, such as monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but in general the photosensitive devices of camera lens are nothing more 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 become smaller, plus the current development trend of electronic products towards better functions and thinner and smaller dimensions, miniature camera lens with good imaging quality therefore have 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. Also, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens designs. There is an urgent need for ultra-thin wide-angle camera lenses which with good optical characteristics and fully corrected aberration.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a structure of a camera optical lens according to Embodiment 1 of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1.

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1.

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

FIG. 5 is a schematic diagram of a structure of a camera optical lens according to Embodiment 2 of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5.

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5.

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5.

FIG. 9 is a schematic diagram of a structure of a camera optical lens according to Embodiment 3 of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9.

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9.

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF EMBODIMENTS

To make the objects, technical solutions, and advantages of the present disclosure clearer, embodiments of the present disclosure are described in detail with reference to accompanying drawings in the following. A person of ordinary skill in the art can understand that, in the embodiments of the present disclosure, many technical details are provided to make readers better understand the present disclosure. However, even without these technical details and any changes and modifications based on the following embodiments, technical solutions required to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the accompanying drawings, the present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of Embodiment 1 of the present disclosure, the camera optical lens 10 includes six lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side: 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. An optical element such as an optical filter GF can be arranged between the sixth lens L7 and an image surface Si.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all made of plastic material.

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

Here, a focal length of the camera optical lens 10 is defined as f, a focal length of the first lens L1 is defined as f1, and the camera optical lens 10 should satisfy a condition of 1.00≤f1/f≤20.00, which specifies a positive refractive power of the first lens L1. A value lower than a lower limit may facilitate a development towards ultra-thin lenses, but the positive refractive power of the first lens L1 may be too powerful to correct such a problem as aberration, which is unbeneficial for a development towards wide-angle lenses. On the contrary, a value higher than an upper limit may weaken the positive refractive power of the first lens L1, and it will be difficult to realize the development towards ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 1.46≤f1/f≤11.39.

A curvature radius of an object-side surface of the first lens L1 is defined as R1, an on-axis thickness of the first lens L1 is defined as d1, and the camera optical lens 10 further satisfies a condition of 30.00≤R1/d1≤40.00, which specifies a shape of the first lens L1. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting a problem like the aberration. Preferably, the camera optical lens 10 further satisfies a condition of 30.19≤R1/d1≤39.46.

A total optical length from the object-side surface of the first lens L1 to the image surface Si of the camera optical lens along an optical axis is defined as TTL.

When a focal length f of the camera optical lens 10, the focal length f1 of the first lens L1, a curvature radius R1 of the object-side surface of the first lens L1 and an on-axis thickness d1 of the first lens L1 all satisfy the above conditions, the camera optical lens 10 has an advantage of high performance and satisfies a design requirement of low TTL.

In an embodiment, the object-side surface of the first lens L1 is convex in a paraxial region, an image-side surface of the first lens L1 is convex in the paraxial region, and the first lens L1 has a positive refractive power.

A curvature radius of the object-side surface of the first lens L1 is defined as R1, a curvature radius of the image-side surface of the first lens L1 is defined as R2, and the camera optical lens 10 further satisfies a condition of −0.60≤(R1+R2)/(R1−R2)≤0.39. This can reasonably control a shape of the first lens L1 in such a manner that the first lens L1 can effectively correct a spherical aberration of the camera optical lens. Preferably, the camera optical lens 10 further satisfies a condition of −0.38≤(R1+R2)/(R1−R2)≤0.31.

An on-axis thickness of the first lens L1 is defined as d1, and the camera optical lens 10 further satisfies a condition of 0.03≤d1/TTL≤0.08. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.04≤d1/TTL≤0.07.

In an embodiment, an object-side surface of the second lens L2 is convex in the paraxial region, and an image-side surface of the second lens L2 is concave in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, the focal length of the second lens L2 is defined as f2, and the camera optical lens 10 further satisfies a condition of −10.77≤f2/f≤−2.66. By controlling a negative refractive power of the second lens L2 within a reasonable range, correction of the aberration of the optical system can be facilitated. Preferably, the camera optical lens 10 further satisfies a condition of −6.73≤f2/f≤−3.32.

A curvature radius of the object-side surface of the second lens L2 is defined as R3, a curvature radius of the image-side surface of the second lens L2 is defined as R4, and the camera optical lens 10 further satisfies a condition of 3.55≤(R3+R4)/(R3−R4)≤12.86, which specifies a shape of the second lens L2. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting the problem of the aberration. Preferably, the camera optical lens 10 further satisfies a condition of 5.68≤(R3+R4)/(R3−R4)≤10.29.

An on-axis thickness of the second lens L2 is defines as d3, and the camera optical lens 10 further satisfies a condition of 0.04≤d3/TTL≤0.12. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.06≤d3/TTL≤0.10.

In an embodiment, an image-side surface of the third lens L3 is convex in the paraxial region.

A focal length of the third lens L3 is defined as f3, and the camera optical lens 10 further satisfies a condition of 0.80≤f3/f≤2.70. An appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of 1.28≤f3/f≤2.16.

A curvature radius of an object-side surface of the third lens L3 is defined as R5, a curvature radius of the image-side surface of the third lens L3 is defined as R6, and the camera optical lens 10 further satisfies a condition of 0.27≤(R5+R6)/(R5−R6)≤1.53, which specifies a shape of the third lens L3. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting a problem like the aberration. Preferably, the camera optical lens 10 further satisfies a condition of 0.44≤(R5+R6)/(R5−R6)≤1.22.

An on-axis thickness of the third lens L3 is defined as d5, and the camera optical lens 10 further satisfies a condition of 0.05≤d5/TTL≤0.16. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.08≤d5/TTL≤0.13.

In an embodiment, an object-side surface of the fourth lens L4 is convex in the paraxial region, an image-side surface of the fourth lens L4 is concave in the paraxial region, and the fourth lens L4 has a negative refractive power.

A focal length of the fourth lens L4 is defined as f4, and the camera optical lens 10 further satisfies a condition of −7.86≤f4/f≤−2.08. The appropriate distribution of refractive power makes it possible that the system has the better imaging quality and the lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of −4.91≤f4/f≤−2.60.

A curvature radius of the object-side surface of the fourth lens L4 is defined as R7, a curvature radius of the image-side surface of the fourth lens L4 is defined as R8, and the camera optical lens 10 further satisfies a condition of 2.43≤(R7+R8)/(R7−R8)≤10.77, which specifies a shape of the fourth lens L4. Within this range, a development towards ultra-thin and wide-angle lens would facilitate correcting a problem like an off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of 3.89≤(R7+R8)/(R7−R8)≤8.62.

An on-axis thickness of the fourth lens L4 is defined as d7, and the camera optical lens 10 further satisfies a condition of 0.02≤d7/TTL≤0.07. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.04≤d7/TTL≤0.06.

In an embodiment, an object-side surface of the fifth lens L5 is convex in the paraxial region, an image-side surface of the fifth lens L5 is convex in the paraxial region, and the fifth lens L5 has a positive refractive power.

A focal length of the fifth lens L5 is defined as f5, and the camera optical lens 10 further satisfies a condition of 0.43≤f5/f≤1.36, which can effectively make a light angle of the camera lens gentle and reduce an tolerance sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of 0.69≤f5/f≤1.09.

A curvature radius of the object-side surface of the fifth lens L5 is defined as R9, a curvature radius of the image-side surface of the fifth lens L5 is defined as R10, and the camera optical lens 10 further satisfies a condition of 0.23≤(R9+R10)/(R9−R10)≤0.82, which specifies a shape of the fifth lens L5. Within this range, a development towards ultra-thin and wide-angle lenses can facilitate correcting a problem of the off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of 0.37≤(R9+R10)/(R9−R10)≤0.66.

An on-axis thickness of the fifth lens L5 is defined as d9, and the camera optical lens 10 further satisfies a condition of 0.07≤d9/TTL≤0.22. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.11≤d9/TTL≤0.18.

In an embodiment, an object-side surface of the sixth lens L6 is convex in the paraxial region, an image-side surface of the sixth lens L6 is concave in the paraxial region, and the sixth lens L6 has a negative refractive power.

A focal length of the sixth lens L6 is defined as f6, and the camera optical lens 10 further satisfies a condition of −1.62≤f6/f≤−0.53. The appropriate distribution of refractive power makes it possible that the system has the better imaging quality and lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of −1.01≤f6/f≤−0.66.

A curvature radius of the object-side surface of the sixth lens L6 is defined as R11, a curvature radius of the image-side surface of the sixth lens L6 is defined as R12, and the camera optical lens 10 further satisfies a condition of 0.92≤(R11+R12)/(R11−R12)≤3.07, which specifies a shape of the sixth lens L6. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting the problem of the off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of 1.48≤(R11+R12)/(R11−R12)≤2.46.

An on-axis thickness of the sixth lens L6 is defined as d11, and the camera optical lens 10 further satisfies a condition of 0.04≤d11/TTL≤0.11. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.06≤d11/TTL≤0.09.

In an embodiment, the focal length of the camera optical lens is defined as f, a combined focal length of the first lens and the second lens is defined as f12, and the camera optical lens 10 further satisfies a condition of 1.54≤f12/f≤7.15. This can eliminate the aberration and distortion of the camera optical lens and reduce a back focal length of the camera optical lens, thereby maintaining miniaturization of the camera optical lens. Preferably, the camera optical lens 10 further satisfies a condition of 2.47≤f12/f≤5.72.

In an embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.24 mm, which is beneficial for achieving ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.96 mm.

In an embodiment, the camera optical lens 10 has a large aperture, and an F number of the camera optical lens 10 is less than or equal to 1.80. Preferably, the F number of the camera optical lens 10 is less than or equal to 1.77.

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

In the following, examples will be used to describe the camera optical lens 10 of the present disclosure. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object-side surface of the first lens to the image surface of the camera optical lens along the optical axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on the object-side surface and/or the image-side surface of the lens, so as to satisfy the demand for high quality imaging. The description below can be referred for specific implementations.

The design data of the camera optical lens 10 in Embodiment 1 of the present disclosure are shown in Table 1 and Table 2.

TABLE 1

R
d
nd
νd

S1
∞
d0=
−0.105

R1
9.390
d1=
0.309
nd1
1.5467
ν1
55.82

R2
−7.881
d2=
0.028

R3
2.662
d3=
0.410
nd2
1.6781
ν2
19.39

R4
2.027
d4=
0.227

R5
70.640
d5=
0.612
nd3
1.5467
ν3
55.82

R6
−4.274
d6=
0.571

R7
3.507
d7=
0.260
nd4
1.6516
ν4
22.54

R8
2.445
d8=
0.274

R9
7.907
d9=
0.841
nd5
1.5467
ν5
55.82

R10
−2.477
d10=
0.612

R11
3.950
d11=
0.426
nd6
1.5461
ν6
56.03

R12
1.176
d12=
0.637

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.228

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radius for a lens;

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

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

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

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

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

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

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

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

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

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

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

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

R13: curvature radius of an object-side surface of the optical filter GF;

R14: 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 lens;

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

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

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

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

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

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

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

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

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

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

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

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

d12: on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the optical filter GF;

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

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

nd: refractive index of the d line;

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

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

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

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

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

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

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

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF.

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

TABLE 2

Conic

coefficient
Aspheric surface coefficients

k
A4
A6
A8
A10

R1
2.9388E+01
1.5580E−01
−2.3458E−01
−7.9210E−01
4.0064E+00

R2
−1.9808E+02
−5.2184E−02
4.2569E−01
−2.3991E+00
8.0236E+00

R3
3.1684E+00
−2.7739E−01
2.6003E−01
−2.4146E+00
9.3548E+00

R4
1.3381E+00
−2.3490E−01
8.5339E−02
−1.0726E+00
4.1307E+00

R5
−1.3074E+04
−3.0535E−03
−9.3633E−02
1.2559E+00
−6.9768E+00

R6
−4.2656E+01
−4.6958E−01
1.0809E+00
−6.9317E−01
−1.0855E+01

R7
−2.1568E+01
−5.1559E−01
1.7548E+00
−6.1122E+00
1.3799E+01

R8
−4.3459E+00
−1.2494E+00
1.4552E+00
4.1347E+00
−3.2111E+01

R9
−1.3734E+01
8.5100E−01
−1.0210E+01
6.3979E+01
−2.6055E+02

R10
−4.2471E−01
2.9387E+00
−1.4053E+01
8.1299E+01
−3.1799E+02

R11
−1.3487E+02
−1.5933E+01
4.5406E+01
−9.0038E+01
2.9601E+02

R12
−5.9142E+00
−1.0855E+01
5.1917E+01
−2.1726E+02
6.8700E+02

Aspheric surface coefficients

A12
A14
A16
A18
A20

R1
−6.4565E+00
4.4246E+00
−7.1080E−01
1.2993E+00
−1.6770E+00

R2
−1.6172E+01
2.1371E+01
−1.7156E+01
6.9744E+00
−8.3133E−01

R3
−2.1598E+01
3.1294E+01
−2.7803E+01
1.3562E+01
−2.7845E+00

R4
−9.3561E+00
1.2569E+01
−9.7204E+00
3.9983E+00
−6.9481E−01

R5
1.9165E+01
−3.1516E+01
3.1557E+01
−1.7405E+01
3.9953E+00

R6
4.6905E+01
−9.4241E+01
1.0517E+02
−6.2546E+01
1.5443E+01

R7
−2.1791E+01
2.6708E+01
−2.4296E+01
1.3582E+01
−3.3514E+00

R8
8.6959E+01
−1.1732E+02
8.0176E+01
−2.3915E+01
1.5033E+00

R9
6.4270E+02
−9.7128E+02
8.9361E+02
−4.6480E+02
1.0529E+02

R10
7.9575E+02
−1.2669E+03
1.2430E+03
−6.8367E+02
1.6021E+02

R11
−8.6292E+02
1.4890E+03
−1.4552E+03
7.5414E+02
−1.6141E+02

R12
−1.4978E+03
2.1373E+03
−1.8903E+03
9.3505E+02
−1.9705E+02

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are aspheric surface coefficients.

IH: Image height

y=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶+A18x¹⁸+A20x²⁰ (1)

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

Table 3 and Table 4 show design data of inflexion points and arrest points of the camera optical lens 10 according to Embodiment 1 of the present disclosure. P1R1 and P1R2 represent the object-side surface and the image-side surface of the first lens L1, P2R1 and P2R2 represent the object-side surface and the image-side surface of the second lens L2, P3R1 and P3R2 represent the object-side surface and the image-side surface of the third lens L3, P4R1 and P4R2 represent the object-side surface and the image-side surface of the fourth lens L4, P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5, and P6R1 and P6R2 represent the object-side surface and the image-side surface of the sixth lens L6. The data in the column named “inflexion point position” refer to vertical distances from 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” refer to vertical distances from arrest points arranged on each lens surface to the optical axis of the camera optical lens 10.

TABLE 3

Number(s) of
Inflexion point
Inflexion point
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3
position 4
position 5

P1R1
0

P1R2
1
0.745

P2R1
1
0.655

P2R2
1
0.675

P3R1
4
0.475
0.995
1.195
1.245

P3R2
1
1.355

P4R1
1
0.535

P4R2
5
0.655
1.325
1.595
1.795
1.855

P5R1
1
0.955

P5R2
0

P6R1
2
0.285
1.665

P6R2
1
0.625

TABLE 4

Arrest
Arrest
Arrest
Arrest

Number(s) of
point
point
point
point

arrest points
position 1
position 2
position 3
position 4

P1R1
0

P1R2
1
1.015

P2R1
1
1.115

P2R2
1
1.235

P3R1
4
0.635
1.145
1.235
1.245

P3R2
0

P4R1
1
1.035

P4R2
0

P5R1
1
1.425

P5R2
0

P6R1
1
0.525

P6R2
1
1.595

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm and 656 nm after passing the camera optical lens 10 according to Embodiment 1, respectively. FIG. 4 illustrates a field curvature and a distortion with a wavelength of 546 nm after passing the camera optical lens 10 according to Embodiment 1. A field curvature S in FIG. 4 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

Table 13 in the following shows various values of Embodiments 1, 2, 3 and values corresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this Embodiment, an entrance pupil diameter of the camera optical lens is 2.343 mm, an image height of 1.0H is 4.00 mm, an FOV (field of view) in a diagonal direction is 88.30°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5

R
d
nd
νd

S1
∞
d0=
−0.105

R1
11.793
d1=
0.303
nd1
1.5467
ν1
55.82

R2
−6.952
d2=
0.031

R3
2.689
d3=
0.428
nd2
1.6781
ν2
19.39

R4
2.025
d4=
0.231

R5
−390.879
d5=
0.604
nd3
1.5467
ν3
55.82

R6
−3.600
d6=
0.617

R7
4.001
d7=
0.256
nd4
1.6516
ν4
22.54

R8
2.635
d8=
0.276

R9
7.390
d9=
0.826
nd5
1.5467
ν5
55.82

R10
−2.683
d10=
0.583

R11
3.207
d11=
0.426
nd6
1.5461
ν6
56.03

R12
1.104
d12=
0.637

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.226

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

TABLE 6

Conic

coefficient
Aspheric surface coefficients

k
A4
A6
A8
A10

R1
4.5893E+01
2.1591E−01
−3.9224E−01
−5.7347E−01
3.9976E+00

R2
−2.2279E+02
−7.3100E−02
4.3223E−01
−2.3457E+00
8.0157E+00

R3
3.0909E+00
−2.9038E−01
2.8060E−01
−2.4179E+00
9.3505E+00

R4
1.3086E+00
−2.4449E−01
1.0374E−01
−1.0763E+00
4.1236E+00

R5
2.4969E+02
−1.0748E−02
−1.1385E−01
1.3146E+00
−7.0039E+00

R6
−2.7609E+01
−4.9686E−01
1.1013E+00
−7.2141E−01
−1.0845E+01

R7
−1.1803E+01
−5.7534E−01
1.6971E+00
−5.5801E+00
1.3204E+01

R8
−2.3746E+00
−1.3020E+00
1.4113E+00
4.1005E+00
−3.2001E+01

R9
−1.5764E+00
8.6725E−01
−1.0676E+01
6.5264E+01
−2.6042E+02

R10
−2.7373E−01
2.7341E+00
−1.4195E+01
8.1870E+01
−3.1700E+02

R11
−9.5987E+01
−1.7326E+01
4.7963E+01
−9.0135E+01
2.9703E+02

R12
−5.9923E+00
−1.1142E+01
5.2474E+01
−2.1733E+02
6.8640E+02

Aspheric surface coefficients

A12
A14
A16
A18
A20

R1
−6.5152E+00
4.3808E+00
−8.0649E−01
1.3194E+00
−1.4092E+00

R2
−1.6187E+01
2.1325E+01
−1.7160E+01
6.9489E+00
−6.7880E−01

R3
−2.1591E+01
3.1281E+01
−2.7814E+01
1.3555E+01
−2.7413E+00

R4
−9.3600E+00
1.2569E+01
−9.7165E+00
4.0002E+00
−6.9503E−01

R5
1.9129E+01
−3.1514E+01
3.1586E+01
−1.7393E+01
3.9785E+00

R6
4.6913E+01
−9.4175E+01
1.0511E+02
−6.2587E+01
1.5486E+01

R7
−2.3020E+01
3.0230E+01
−2.7213E+01
1.4251E+01
−3.2213E+00

R8
8.7061E+01
−1.1740E+02
8.0036E+01
−2.3895E+01
1.5636E+00

R9
6.3874E+02
−9.6822E+02
8.9486E+02
−4.6587E+02
1.0504E+02

R10
7.9398E+02
−1.2673E+03
1.2437E+03
−6.8311E+02
1.6018E+02

R11
−8.6699E+02
1.4863E+03
−1.4533E+03
7.6401E+02
−1.6871E+02

R12
−1.4976E+03
2.1381E+03
−1.8913E+03
9.3545E+02
−1.9698E+02

Table 7 and table 8 show design data of inflexion points and arrest points of each lens of the camera optical lens 20 lens according to Embodiment 2 of the present disclosure.

TABLE 7

Number(s) of
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3

P1R1
0

P1R2
1
0.735

P2R1
1
0.645

P2R2
2
0.675
1.265

P3R1
3
0.995
1.195
1.245

P3R2
1
1.335

P4R1
1
0.545

P4R2
3
0.675
1.315
1.605

P5R1
1
0.985

P5R2
2
1.445
2.035

P6R1
2
0.285
1.645

P6R2
1
0.615

TABLE 8

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1
0

P1R2
1
1.005

P2R1
1
1.095

P2R2
1
1.225

P3R1
1
1.275

P3R2
0

P4R1
1
1.035

P4R2
0

P5R1
1
1.515

P5R2
0

P6R1
2
0.545
2.795

P6R2
1
1.555

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm and 656 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 20 according to Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies the above conditions.

In an embodiment, an entrance pupil diameter of the camera optical lens is 2.342 mm, an image height of 1.0H is 4.00 mm, an FOV (field of view) in the diagonal direction is 88.60°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis aberrations are fully corrected, thereby achieving excellent 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 therebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.105

R1
9.472
d1=
0.306
nd1
1.5467
ν1
55.82

R2
−17.610
d2=
0.029

R3
2.580
d3=
0.459
nd2
1.6781
ν2
19.39

R4
2.041
d4=
0.223

R5
15.544
d5=
0.599
nd3
1.5467
ν3
55.82

R6
−4.570
d6=
0.543

R7
2.864
d7=
0.270
nd4
1.6516
ν4
22.54

R8
2.164
d8=
0.328

R9
8.371
d9=
0.764
nd5
1.5467
ν5
55.82

R10
−2.436
d10=
0.651

R11
3.787
d11=
0.428
nd6
1.5461
ν6
56.03

R12
1.161
d12=
0.637

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.229

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

TABLE 10

Conic

coefficient
Aspheric surface coefficients

k
A4
A6
A8
A10

R1
2.7407E+01
2.0647E−01
−3.5516E−01
−4.6767E−01
3.6263E+00

R2
−1.9289E+02
−5.0434E−02
4.3287E−01
−2.3118E+00
7.9503E+00

R3
3.0576E+00
−3.4412E−01
3.4166E−01
−2.4531E+00
9.3145E+00

R4
1.3448E+00
−2.3877E−01
9.0894E−02
−1.0639E+00
4.1226E+00

R5
−1.8826E+03
1.4905E−02
−1.6170E−01
1.2727E+00
−6.9006E+00

R6
−4.3941E+01
−4.9605E−01
1.0627E+00
−6.8951E−01
−1.0866E+01

R7
−1.6492E+01
−5.9272E−01
1.8376E+00
−6.2163E+00
1.3959E+01

R8
−5.4267E+00
−1.2852E+00
1.5550E+00
4.0479E+00
−3.2060E+01

R9
−1.3875E+01
8.2009E−01
−1.0262E+01
6.5085E+01
−2.6151E+02

R10
−1.9697E−01
2.8812E+00
−1.4327E+01
8.2834E+01
−3.1717E+02

R11
−1.0712E+02
−1.6656E+01
4.6190E+01
−8.8846E+01
2.9590E+02

R12
−5.6799E+00
−1.1206E+01
5.2816E+01
−2.1825E+02
6.8846E+02

Aspheric surface coefficients

A12
A14
A16
A18
A20

R1
−6.3685E+00
4.7083E+00
−8.4578E−01
1.2384E+00
−1.7007E+00

R2
−1.6273E+01
2.1465E+01
−1.6953E+01
6.8301E+00
−8.8057E−01

R3
−2.1520E+01
3.1237E+01
−2.7800E+01
1.3580E+01
−2.8130E+00

R4
−9.3602E+00
1.2572E+01
−9.7189E+00
3.9992E+00
−6.9464E−01

R5
1.9104E+01
−3.1575E+01
3.1601E+01
−1.7338E+01
3.9475E+00

R6
4.6965E+01
−9.4232E+01
1.0509E+02
−6.2521E+01
1.5456E+01

R7
−2.2023E+01
2.7058E+01
−2.4409E+01
1.3344E+01
−3.1846E+00

R8
8.7080E+01
−1.1740E+02
8.0029E+01
−2.3934E+01
1.5919E+00

R9
6.4191E+02
−9.7121E+02
8.9307E+02
−4.6179E+02
1.0357E+02

R10
7.9331E+02
−1.2675E+03
1.2417E+03
−6.7879E+02
1.5869E+02

R11
−8.6521E+02
1.4866E+03
−1.4508E+03
7.5559E+02
−1.6380E+02

R12
−1.4989E+03
2.1365E+03
−1.8894E+03
9.3591E+02
−1.9784E+02

Table 11 and Table 12 show design data inflexion points and arrest points of the respective lenses in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 11

Inflexion
Inflexion
Inflexion
Inflexion

Number(s) of
point
point
point
point

inflexion points
position 1
position 2
position 3
position 4

P1R1
0

P1R2
1
0.695

P2R1
1
0.635

P2R2
2
0.675
1.265

P3R1
4
0.485
1.015
1.195
1.255

P3R2
1
1.345

P4R1
1
0.525

P4R2
3
0.625
1.315
1.575

P5R1
1
0.985

P5R2
2
1.345
2.195

P6R1
2
0.285
1.665

P6R2
1
0.625

TABLE 12

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1
0

P1R2
1
0.925

P2R1
1
1.115

P2R2
1
1.235

P3R1
2
0.715
1.275

P3R2
0

P4R1
1
1.035

P4R2
1
1.785

P5R1
1
1.515

P5R2
0

P6R1
1
0.535

P6R2
1
1.585

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm and 656 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 30 according to Embodiment 3.

Table 13 in the following lists values corresponding to the respective conditions in an embodiment according to the above conditions. Obviously, the embodiment satisfies the above conditions.

In an embodiment, an entrance pupil diameter of the camera optical lens is 2.328 mm, an image height of 1.0H is 4.00 mm, an FOV (field of view) in the diagonal direction is 88.80°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis aberrations are fully corrected, thereby achieving excellent optical characteristics.

TABLE 13

Parameters and

conditions
Embodiment 1
Embodiment 2
Embodiment 3

f
4.101
4.098
4.075

f1
7.887
8.046
11.311

f2
−16.961
−16.337
−21.941

f3
7.393
6.643
6.529

f4
−13.71
−12.783
−16.015

f5
3.551
3.708
3.539

f6
−3.243
−3.319
−3.253

f12
12.642
13.427
19.416

FNO
1.75
1.75
1.75

f1/f
1.92
1.96
2.78

R1/d1
30.39
38.92
30.95

It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present disclosure. In practice, one having ordinary skill in the art can make various modifications to these embodiments in forms and details without departing from the scope of the present disclosure.

Claims

1. A camera optical lens comprising, from an object side to an image side: a first lens;a second lens having a negative refractive power;a third lens having a positive refractive power;a fourth lens;a fifth lens; anda sixth lens;wherein the camera optical lens satisfies following conditions: 1.00≤f1/f≤20.00; and30.00≤R1/d1≤40.00;−10.77≤f2/f≤−2.66;wheref denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens;f2 denotes a focal length of the second lens;R1 denotes a curvature radius of an object-side surface of the first lens; andd1 denotes an on-axis thickness of the first lens.
2. The camera optical lens according to claim 1 further satisfying following conditions: 1.46≤f1/f≤11.39; and30.19≤R1/d1≤39.46.
3. The camera optical lens according to claim 1, wherein the first lens has a positive refractive power, the object-side surface of the first lens is convex in a paraxial region and an image-side surface of the first lens is convex in the paraxial region; and the camera optical lens further satisfies following conditions: −0.60≤(R1+R2)/(R1−R2)≤0.39; and0.03≤d1/TTL≤0.08;whereR2 denotes a curvature radius of the image-side surface of the first lens; andTTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
4. The camera optical lens according to claim 3 further satisfying following conditions: −0.38≤(R1+R2)/(R1−R2)≤0.31; and0.04≤d1/TTL≤0.07.
5. The camera optical lens according to claim 1, wherein an object-side surface of the second lens is convex in a paraxial region, an image-side surface of the second lens is concave in the paraxial region, and the camera optical lens further satisfies following conditions: 3.55≤(R3+R4)/(R3−R4)≤12.86; and0.04≤d3/TTL≤0.12;whereR3 denotes a curvature radius of the object-side surface of the second lens;R4 denotes a curvature radius of the image-side surface of the second lens;d3 denotes an on-axis thickness of the second lens; andTTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
6. The camera optical lens according to claim 5 further satisfying following conditions: −6.73≤f2/f≤−3.32;5.68≤(R3+R4)/(R3−R4)≤10.29; and0.06≤d3/TTL≤0.10.
7. The camera optical lens according to claim 1, wherein an image-side surface of the third lens is convex in a paraxial region, and the camera optical lens further satisfies following conditions: 0.80≤f3/f≤2.70;0.27≤(R5+R6)/(R5−R6)≤1.53; and0.05≤d5/TTL≤0.16;wheref3 is a focal length of the third lens;R5 denotes a curvature radius of an object-side surface of the third lens;R6 denotes a curvature radius of the image-side surface of the third lens;d5 denotes an on-axis thickness of the third lens; andTTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
8. The camera optical lens according to claim 7 further satisfying following conditions: 1.28≤f3/f≤2.16;0.44≤(R5+R6)/(R5−R6)≤1.22; and0.08≤d5/TTL≤0.13.
9. The camera optical lens according to claim 1, wherein the fourth lens has a negative refractive power, an object-side surface of the fourth lens is convex in a paraxial region, an image-side surface of the fourth lens is concave in the paraxial region, and the camera optical lens further satisfies following conditions: −7.86≤f4/f≤−2.08;2.43≤(R7+R8)/(R7−R8)≤10.77; and0.02≤d7/TTL≤0.07;wheref4 is a focal length of the fourth lens;R7 denotes a curvature radius of the object-side surface of the fourth lens;R8 denotes a curvature radius of the image-side surface of the fourth lens;d7 denotes an on-axis thickness of the fourth lens; andTTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
10. The camera optical lens according to claim 9 further satisfying following conditions: −4.91≤f4/f≤−2.60;3.89≤(R7+R8)/(R7−R8)≤8.62; and0.04≤d7/TTL≤0.06.
11. The camera optical lens according to claim 1, wherein the fifth lens has a positive refractive power, an object-side surface of the fifth lens is convex in a paraxial region, an image-side surface of the fifth lens is convex in the paraxial region, and the camera optical lens further satisfies following conditions: 0.43≤f5/f≤1.36;0.23≤(R9+R10)/(R9−R10)≤0.82; and0.07≤d9/TTL≤0.22;wheref5 denotes a focal length of the fifth lens;R9 denotes a curvature radius of the object-side surface of the fifth lens;R10 denotes a curvature radius of the image-side surface of the fifth lens;d9 denotes an on-axis thickness of the fifth lens; andTTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
12. The camera optical lens according to claim 11 further satisfying following conditions: 0.69≤f5/f≤1.09;0.37≤(R9+R10)/(R9−R10)≤0.66; and0.11≤d9/TTL≤0.18.
13. The camera optical lens according to claim 1, wherein the sixth lens has a negative refractive power, an object-side surface of the sixth lens is convex in a paraxial region, an image-side surface of the sixth lens is concave in the paraxial region, and the camera optical lens further satisfies following conditions: −1.62≤f6/f≤−0.53;0.92≤(R11+R12)/(R11−R12)≤3.07; and0.04≤d11/TTL≤0.11;wheref6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of the object-side surface of the sixth lens;R12 denotes a curvature radius of the image-side surface of the sixth lens;d11 denotes an on-axis thickness of the sixth lens; andTTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
14. The camera optical lens according to claim 13 further satisfying following conditions: −1.01≤f6/f≤−0.66;1.48≤(R11+R12)/(R11−R12)≤2.46; and0.06≤d11/TTL≤0.09.
15. The camera optical lens according to claim 1, wherein the camera optical lens further satisfies following condition: 1.54≤f12/f≤7.15,wheref12 denotes a combined focal length of the first lens and the second lens.
16. The camera optical lens according to claim 15 further satisfying following condition: 2.47≤f12/f≤5.72.
17. The camera optical lens according to claim 1, where a total optical length TTL from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis is less than or equal to 6.24 mm.
18. The camera optical lens according to claim 17, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.96 mm.
19. The camera optical lens according to claim 1, wherein an F number of the camera optical lens is less than or equal to 1.80.
20. The camera optical lens according to claim 19, wherein the F number of the camera optical lens is less than or equal to 1.77.

Priority Claims (1)

Number	Date	Country	Kind
201910582043.8	Jun 2019	CN	national

Foreign Referenced Citations (1)

Number	Date	Country
10031155	Feb 1998	JP

Non-Patent Literature Citations (1)

Entry
JP-10031155-A translation (Year: 1998).

Related Publications (1)

	Number	Date	Country
	20200409106 A1	Dec 2020	US

Camera optical lens including six lenses of +-+-+- refractive powers

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

Field of Search

CPC

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