Camera optical lens

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 seven 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, a sixth lens L6 and a seventh lens L7. An optical element such as an optical filter GF can be arranged between the seventh lens L7 and an image surface Si.

The first lens L1, the third lens L3, the fifth lens L5, the sixth lens L6 and the seventh lens L7 are all made of plastic material. The second lens L2 and the fourth lens L4 are all made of glass material.

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 1.51≤f1/f≤2.50, 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 a problem like an 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 1.52≤f1/f≤2.43.

A refractive index of the second lens L2 is defined as n2, and the camera optical lens 10 should satisfy a condition of 1.70≤n2≤2.20, which specifies the refractive index of the second lens L2. Within this range, it facilitates the development towards ultra-thin lenses and correction of the aberration. Preferably, the camera optical lens 10 further satisfies a condition of 1.71≤n2≤2.05.

A focal length of the third lens L3 is defined as f3, a focal length of the fourth lens L4 is defined as f4, and the camera optical lens 10 should satisfy a condition of −2.00≤f3/f4≤1.80, which specifies a ratio of the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4. This can effectively reduce a sensitivity of the camera optical lens and further enhance an imaging quality. Preferably, the camera optical lens 10 further satisfies a condition of −1.93≤f3/f4≤1.80.

A curvature radius of an object-side surface of the seventh lens L7 is defined as R13, a curvature radius of an image-side surface of the seventh lens L7 is defined as R14, and the camera optical lens 10 further satisfies a condition of −10.00≤(R13+R14)/(R13−R14)≤10.00, which specifies a shape of the seventh lens L7. 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 −9.55≤(R13+R14)/(R13−R14)≤9.57.

A refractive index of the fourth lens L4 is defined as n4, and the camera optical lens 10 should satisfy a condition of 1.70≤n4≤2.20, which specifies the refractive index of the fourth lens L4. Within this range, it facilitates the development towards ultra-thin lenses and the correction of the aberration. Preferably, the camera optical lens 10 further satisfies a condition of 1.71≤n4≤2.02.

A total optical length from an 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, the focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, the refractive index n2 of the second lens L2, the refractive index n4 of the fourth lens L4, the curvature radius R13 of the object-side surface of the seventh lens L7, and the curvature radius R14 of the image-side surface of the seventh lens L7 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 proximal region, an image-side surface of the first lens L1 is concave in the proximal 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 an image-side surface of the first lens L1 is defined as R2, and the camera optical lens 10 further satisfies a condition of −13.55≤(R1+R2)/(R1−R2)≤−1.67. 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 −8.47≤(R1+R2)/(R1−R2)≤−2.08.

An on-axis thickness of the first lens L1 is defined as d1, and the camera optical lens 10 further satisfies a condition of 0.04≤d1/TTL≤0.20. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.06≤d1/TTL≤0.16.

In an embodiment, an object-side surface of the second lens L2 is convex in the proximal region, an image-side of the second lens L2 surface is concave in the proximal region, and the second lens L2 has a refractive power.

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 −323.34≤f2/f≤2.00. By controlling a 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 −202.09≤f2/f≤1.60.

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 −4.78≤(R3+R4)/(R3−R4)≤106.50, which specifies a shape of the second lens L2. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting a problem of an on-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −2.99≤(R3+R4)/(R3−R4)≤85.20.

An on-axis thickness of the second lens L2 is defines as d3, and the camera optical lens 10 further satisfies a condition of 0.02≤d3/TTL≤0.13. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.03≤d3/TTL≤0.11.

In an embodiment, an object-side surface of the third lens L3 is concave in the proximal region, an image-side surface of the third lens L3 is convex in the proximal region, and the third lens L3 has a refractive power.

A focal length of the third lens L3 is defined as f3, and the camera optical lens 10 further satisfies a condition of −5.07≤f3/f≤12.63. 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 −3.17≤f3/f≤10.10.

A curvature radius of the 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 −152.68≤(R5+R6)/(R5−R6)≤−1.68. This can effectively control a shape of the third lens L3, thereby facilitating shaping of the third lens and avoiding bad shaping and generation of stress due to an the overly large surface curvature of the third lens L3. Preferably, the camera optical lens 10 further satisfies a condition of −95.43≤(R5+R6)/(R5−R6)≤−2.09.

An on-axis thickness of the third lens L3 is defined as d5, and the camera optical lens 10 further satisfies a condition of 0.02≤d5/TTL≤0.08. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.03≤d5/TTL≤0.06.

In an embodiment, an object-side surface of the fourth lens L4 is convex in the proximal region, and the fourth lens L4 has a positive 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 0.59≤f4/f≤7.04. 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 0.95≤f4/f≤5.63.

A curvature radius of the object-side surface of the fourth lens L4 is defined as R7, a curvature radius of an image-side surface of the fourth lens L4 is defined as R8, and the camera optical lens 10 further satisfies a condition of −40.06≤(R7+R8)/(R7−R8)≤−0.41, 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 the off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −25.04≤(R7+R8)/(R7−R8)≤−0.51.

An on-axis thickness of the fourth lens L4 is defined as d7, and the camera optical lens 10 further satisfies a condition of 0.03≤d7/TTL≤0.13. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.05≤d7/TTL≤0.11.

In an embodiment, the fifth lens L5 has a 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 −6.21≤f5/f≤22.10, 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 −3.88≤f5/f≤17.68.

A curvature radius of an object-side surface of the fifth lens L5 is defined as R9, a curvature radius of an image-side surface of the fifth lens L5 is defined as R10, and the camera optical lens 10 further satisfies a condition of −10.32≤(R9+R10)/(R9−R10)≤0.96, which specifies a shape of the fifth lens L5. Within this range, a development towards ultra-thin and wide-angle lenses can facilitate correcting the problem of the off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −6.45≤(R9+R10)/(R9−R10)≤0.76.

An on-axis thickness of the fifth lens L5 is defined as d9, and the camera optical lens 10 further satisfies a condition of 0.02≤d9/TTL≤0.08. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.03≤d9/TTL≤0.07.

In an embodiment, an object-side surface of the sixth lens L6 is convex in the proximal region, an image-side surface of the sixth lens L6 is concave in the proximal region, and the sixth lens L6 has a positive 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 0.83≤f6/f≤4.70. 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 1.33≤f6/f≤3.76.

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 −10.65≤(R11+R12)/(R11−R12)≤−0.91, 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 −6.66≤(R11+R12)/(R11−R12)≤−1.14.

An on-axis thickness of the sixth lens L6 is defined as d11, and the camera optical lens 10 further satisfies a condition of 0.33≤d11/TTL≤0.12. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.04≤d11/TTL≤0.10.

In an embodiment, the seventh lens L7 has a negative refractive power.

A focal length of the seventh lens L7 is defined as f7, and the camera optical lens 10 further satisfies a condition of −30.18≤f7/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 −18.86≤f7/f≤−0.66.

An on-axis thickness of the seventh lens L7 is defined as d13, and the camera optical lens 10 further satisfies a condition of 0.03≤d13/TTL≤0.24. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.04≤d13/TTL≤0.20.

In an embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.61 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 5.36 mm.

In an embodiment, an F number of the camera optical lens 10 is less than or equal to 2.37. The camera optical lens has a large aperture and a better imaging performance. Preferably, the F number of the camera optical lens 10 is less than or equal to 2.32.

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
vd

S1
∞
d0 =
−0.180

R1
2.007
d1 =
0.407
nd1
1.5445
v1
55.99

R2
4.679
d2 =
0.376

R3
7.082
d3 =
0.221
nd2
1.7174
v2
29.52

R4
6.886
d4 =
0.366

R5
−2.258
d5 =
0.205
nd3
1.6613
v3
20.37

R6
−3.504
d6 =
0.020

R7
4.453
d7 =
0.447
nd4
1.7130
v4
53.87

R8
−32.780
d8 =
0.659

R9
10.697
d9 =
0.280
nd5
1.5445
v5
55.99

R10
15.839
d10 =
0.147

R11
1.943
d11 =
0.262
nd6
1.5445
v6
55.99

R12
3.969
d12 =
0.557

R13
−6.399
d13 =
0.259
nd7
1.5352
v7
56.12

R14
2.356
d14 =
0.585

R15
∞
d15 =
0.210
ndg
1.5163
vg
64.15

R16
∞
d16 =
0.100

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 the object-side surface of the seventh lens L7;

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

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

R16: 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 sixth lens L6 to the object-side surface of the seventh lens L7;

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

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

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

d16: 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;

nd7: refractive index of the d line of the seventh lens L7;

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;

v7: abbe number of the seventh lens L7;

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
A12
A14
A16

R1
−2.0133E−01
9.5703E−03
1.1154E−02
6.1651E−03
1.1451E−02
−4.4578E−02
4.2338E−02
−1.8307E−02

R2
4.0007E+00
−1.2444E−03
1.7522E−02
2.1255E−02
−5.2476E−02
2.6553E−02
−4.5442E−02
1.7563E−02

R3
4.2639E+01
−9.6908E−02
3.0683E−02
2.6268E−02
−1.5872E−01
2.0500E−01
−1.5067E−01
2.4269E−02

R4
−1.8930E+02
−4.5496E−02
−7.2287E−02
2.1635E−01
−4.2470E−01
5.8550E−01
−4.3294E−01
1.7956E−01

R5
0.0000E+00
−8.0270E−02
−7.5542E−02
1.4797E−01
−5.0133E−02
−2.6691E−02
8.8919E−02
−1.2081E−03

R6
0.0000E+00
−8.2439E−02
5.9617E−02
−2.0616E−02
6.5875E−02
−1.6807E−01
1.4533E−01
−3.6237E−02

R7
9.9457E+00
−1.0385E−01
1.4994E−01
−1.5540E−01
9.9168E−02
−5.4044E−02
2.6034E−02
−5.8810E−03

R8
0.0000E+00
−7.5502E−02
4.8518E−02
−1.2450E−02
−5.0951E−03
1.4236E−02
−1.2447E−02
4.6879E−03

R9
3.0206E+01
−7.6772E−02
1.5268E−02
−3.1952E−02
2.5412E−02
−1.0465E−02
2.8612E−03
−3.5003E−04

R10
8.7227E+01
−1.7554E−01
1.0055E−01
−4.1646E−02
1.1221E−02
−4.9632E−04
−2.0259E−04
−1.6465E−05

R11
−2.6675E+00
−8.5429E−02
−7.3461E−02
5.5833E−02
−3.9918E−03
−1.2247E−02
5.1183E−03
−6.0571E−04

R12
2.8183E+00
5.4897E−02
−2.2251E−01
1.8421E−01
−8.4386E−02
2.1931E−02
−2.9830E−03
1.6225E−04

R13
7.3407E+00
−2.5255E−01
1.5921E−01
−3.8837E−02
1.6710E−03
1.1919E−03
−2.4310E−04
1.4538E−05

R14
−1.1300E+01
−1.7223E−01
1.1720E−01
−4.8390E−02
1.2225E−02
−1.8688E−03
1.5899E−04
−5.8501E−06

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14, and A16 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 (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, P6R1 and P6R2 represent the object-side surface and the image-side surface of the sixth lens L6, and P7R1 and P7R2 represent the object-side surface and the image-side surface of the seventh lens L7. 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
Inflexion

inflexion
point
point

points
position 1
position 2

P1R1
0

P1R2
1
0.805

P2R1
1
0.435

P2R2
2
0.345
0.755

P3R1
1
0.805

P3R2
1
0.945

P4R1
0

P4R2
1
0.965

P5R1
2
0.335
1.335

P5R2
2
0.185
1.205

P6R1
2
0.555
1.615

P6R2
2
0.625
1.785

P7R1
2
1.175
1.865

P7R2
1
0.435

TABLE 4

Number(s) of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1
0

P1R2
0

P2R1
1
0.735

P2R2
2
0.635
0.825

P3R1
0

P3R2
0

P4R1
0

P4R2
1
1.165

P5R1
1
0.575

P5R2
1
0.315

P6R1
1
0.965

P6R2
1
1.055

P7R1
0

P7R2
1
0.935

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color with wavelengths of 470 nm, 555 nm and 650 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 555 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 1.825 mm, an image height of 1.0H is 2.934 mm, a FOV (field of view) in a diagonal direction is 71.81°. 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
vd

S1
∞
d0 =
−0.100

R1
1.922
d1 =
0.615
nd1
1.5445
v1
55.99

R2
3.334
d2 =
0.056

R3
2.964
d3 =
0.276
nd2
1.8052
v2
25.43

R4
12.639
d4 =
0.227

R5
−1.204
d5 =
0.210
nd3
1.6713
v3
19.24

R6
−2.796
d6 =
0.025

R7
3.905
d7 =
0.348
nd4
1.7550
v4
52.32

R8
−16.133
d8 =
0.227

R9
−2.899
d9 =
0.214
nd5
1.5445
v5
55.99

R10
−5.758
d10 =
0.030

R11
2.168
d11 =
0.378
nd6
1.5445
v6
55.99

R12
3.171
d12 =
0.258

R13
1.412
d13 =
0.386
nd7
1.5352
v7
56.12

R14
1.134
d14 =
1.017

R15
∞
d15 =
0.210
ndg
1.5163
vg
64.15

R16
∞
d16 =
0.100

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
A12
A14
A16

R1
−8.1481E+00
8.4136E−02
9.6923E−02
−8.8983E−01
1.9458E+00
−2.0295E+00
4.6061E−01
4.0858E−01

R2
3.4017E+00
3.5906E−03
−1.8014E+00
4.3984E+00
−9.2609E+00
1.4924E+01
−8.6745E+00
−1.6821E+00

R3
1.6865E+00
5.8919E−02
−1.1467E+00
1.8065E+00
−5.3131E+00
1.3624E+01
−8.9180E+00
−3.0127E+00

R4
0.0000E+00
−5.4470E−02
−1.4514E−01
−1.0987E+00
6.0750E−01
3.2263E+00
−1.3822E+00
−3.3758E+00

R5
−1.3346E−01
2.3315E−02
−3.2254E−01
1.4625E+00
−5.3478E+00
6.3491E+00
5.2843E+00
−1.1117E+01

R6
1.3324E+00
−2.0969E−02
1.1109E−01
1.8401E−02
8.5485E−02
−8.7043E−02
−1.9067E−01
2.3173E−01

R7
8.5432E+00
−9.7127E−02
1.4496E−01
−1.5792E−01
1.0540E−01
−4.9247E−02
4.6978E−03
4.0737E−03

R8
0.0000E+00
−5.6997E−02
5.6169E−02
−6.5812E−03
3.6333E−03
1.1934E−02
−4.8690E−03
2.3033E−04

R9
−4.7425E−01
−3.0929E−02
−7.5018E−03
−5.2211E−03
3.3535E−02
−1.0241E−03
2.6584E−03
−2.1250E−03

R10
−5.1423E+00
−1.9010E−01
1.3860E−01
−4.0173E−02
1.2286E−02
−2.6567E−04
1.4257E−04
1.3609E−04

R11
1.3683E+00
−2.2221E−01
−5.9822E−02
0.0000E+00
1.3832E−02
−2.8260E−03
6.0501E−04
4.5159E−04

R12
1.9472E+00
2.6048E−02
−2.1714E−01
1.8512E−01
−8.4048E−02
2.1916E−02
−3.0131E−03
1.4906E−04

R13
−4.1475E+00
−2.7110E−01
1.5280E−01
−3.8898E−02
1.8436E−03
1.2275E−03
−2.4684E−04
1.3467E−05

R14
−3.5330E+00
−2.1082E−01
1.2115E−01
−4.7963E−02
1.2147E−02
−1.8788E−03
1.5978E−04
−5.7248E−06

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
Inflexion
Inflexion

inflexion
point
point
point

points
position 1
position 2
position 3

P1R1
1
0.675

P1R2
1
0.315

P2R1
3
0.365
0.635
0.715

P2R2
1
0.265

P3R1
0

P3R2
1
0.605

P4R1
0

P4R2
1
0.695

P5R1
1
0.865

P5R2
1
0.905

P6R1
2
0.425
1.175

P6R2
1
0.615

P7R1
1
0.445

P7R2
1
0.525

TABLE 8

Number of
Arrest point

arrest points
position 1

P1R1
0

P1R2
1
0.485

P2R1
0

P2R2
1
0.395

P3R1
0

P3R2
0

P4R1
0

P4R2
1
0.905

P5R1
1
1.095

P5R2
1
1.175

P6R1
1
0.715

P6R2
1
1.085

P7R1
1
0.985

P7R2
1
1.195

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 470 nm, 555 nm and 650 nm 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 555 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 1.538 mm, an image height of 1.0H is 2.934 mm, a FOV (field of view) in the diagonal direction is 78.02°. 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
vd

S1
∞
d0 =
−0.100

R1
1.699
d1 =
0.442
nd1
1.5445
v1
55.99

R2
2.287
d2 =
0.067

R3
3.011
d3 =
0.435
nd2
1.9027
v2
31.01

R4
7.344
d4 =
0.213

R5
−1.225
d5 =
0.250
nd3
1.6613
v3
20.37

R6
−1.258
d6 =
0.030

R7
2.435
d7 =
0.338
nd4
1.8348
v4
42.73

R8
2.691
d8 =
0.286

R9
−17.732
d9 =
0.205
nd5
1.6713
v5
19.24

R10
3.926
d10 =
0.147

R11
5.272
d11 =
0.402
nd6
1.5445
v6
55.99

R12
34.293
d12 =
0.499

R13
−5.052
d13 =
0.805
nd7
1.5352
v7
56.12

R14
−6.299
d14 =
0.505

R15
∞
d15 =
0.210
ndg
1.5163
vg
64.15

R16
∞
d16 =
0.100

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
A12
A14
A16

R1
1.4484E+00
−8.8562E−02
−1.0881E−01
−1.4554E−01
3.5808E−01
−5.1346E−01
2.3023E−01
4.9153E−03

R2
3.1795E+00
−8.7455E−02
−5.4913E−01
−2.1613E−01
1.5853E+00
−1.4661E+00
3.9932E−01
5.3347E−03

R3
1.8105E+00
7.3348E−03
−3.1506E−01
4.3280E−02
3.4726E−01
−8.1056E−02
−1.9312E−01
7.8169E−02

R4
−4.6085E+00
−8.7278E−02
−1.3807E−01
−1.2286E−02
−1.3923E−01
3.8776E−01
2.5029E−01
−3.7421E−01

R5
−9.8878E−01
5.7986E−02
2.5404E−01
2.4060E−01
−6.3418E−01
3.6878E−01
1.2809E−01
1.9516E−02

R6
−8.8660E−01
2.2202E−01
1.9672E−01
3.6137E−01
1.8414E−01
−7.2197E−01
−2.5649E−01
7.1019E−01

R7
5.6067E−01
−6.6702E−02
4.7432E−03
8.7503E−03
4.7947E−03
−3.9880E−02
3.2426E−02
−7.6582E−03

R8
2.1267E+00
−1.0241E−01
1.6869E−02
−1.6091E−03
−8.3908E−03
2.1075E−03
−3.6979E−03
4.1218E−04

R9
0.0000E+00
−5.4213E−02
−2.9304E−02
1.3383E−02
1.1640E−02
−4.1684E−03
1.3665E−03
−1.1196E−03

R10
−2.0672E+01
−1.1839E−01
3.0233E−02
3.3312E−03
−2.1153E−03
6.3017E−04
3.9565E−04
3.0448E−04

R11
4.6164E+00
−1.0749E−01
5.6880E−03
−2.6614E−03
1.3919E−03
1.7574E−03
−5.3046E−05
−6.6692E−05

R12
0.0000E+00
−9.3690E−03
1.3421E−03
1.3204E−03
1.1818E−05
−1.0501E−04
6.4961E−06
−6.4867E−07

R13
−1.5747E+01
−3.6290E−02
5.6223E−03
1.1966E−03
6.6068E−05
−3.2208E−05
−1.2665E−05
1.4872E−06

R14
0.0000E+00
−1.4188E−03
−1.2388E−02
2.9022E−03
−3.6915E−04
−3.4842E−05
1.0686E−05
−8.7914E−08

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

Number(s) of
Inflexion
Inflexion
Inflexion

inflexion
point
point
point

points
position 1
position 2
position 3

P1R1
1
0.625

P1R2
1
0.395

P2R1
1
0.485

P2R2
2
0.315
0.795

P3R1
1
0.535

P3R2
1
0.435

P4R1
1
0.835

P4R2
1
0.705

P5R1
0

P5R2
2
0.395
1.055

P6R1
2
0.405
1.195

P6R2
3
0.565
0.905
1.605

P7R1
2
1.335
1.895

P7R2
1
2.115

TABLE 12

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1
0

P1R2
1
0.635

P2R1
0

P2R2
1
0.495

P3R1
1
0.795

P3R2
1
0.665

P4R1
0

P4R2
1
1.055

P5R1
0

P5R2
2
0.725
1.205

P6R1
2
0.695
1.385

P6R2
0

P7R1
0

P7R2
0

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 470 nm, 555 nm and 650 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 555 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 1.768 mm, an image height of 1.0H is 2.934 mm, a FOV (field of view) in the diagonal direction is 70.74°. 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
4.016
3.538
4.065

f1
6.103
7.199
9.552

f2
−649.207
4.716
5.365

f3
−10.188
−3.296
34.224

f4
5.507
4.181
19.066

f5
59.176
−10.982
−4.725

f6
6.664
11.075
11.348

f7
−3.174
−20.757
−61.348

f12
6.071
3.061
3.629

FNO
2.20
2.30
2.30

f1/f
1.52
2.03
2.35

n2
1.72
1.81
1.90

f3/f4
−1.85
−0.79
1.80

(R13 + R14)/
0.46
9.15
−9.10

(R13 − R14)

n4
1.71
1.76
1.83

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;a third lens;a fourth lens;a fifth lens;a sixth lens; anda seventh lens;wherein the camera optical lens satisfies following conditions: 1.51≤f1/f≤2.50,1.70≤n2≤2.20,−2.00≤f3/f4≤1.80;−10.00≤(R13+R14)/(R13−R14)≤10.00; and1.70≤n4≤2.20;wheref denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens;f3 denotes a focal length of the third lens;f4 denotes a focal length of the fourth lens;n2 denotes a refractive index of the second lens;n4 denotes a refractive index of the fourth lens;R13 denotes a curvature radius of an object-side surface of the seventh lens; andR14 denotes a curvature radius of an image-side surface of the seventh lens.
2. The camera optical lens according to claim 1 further satisfying following conditions: 1.52≤f1/f≤2.43;1.71≤n2≤2.05;−1.93≤f3/f4≤1.80;−9.55≤(R13+R14)/(R13−R14)≤9.57; and1.71≤n4≤2.02.
3. The camera optical lens according to claim 1, wherein the first lens has a positive refractive power, an object-side surface of the first lens is convex in a paraxial region and an image-side surface of the first lens is concave in the paraxial region; and the camera optical lens further satisfies following conditions: −13.55≤(R1+R2)/(R1−R2)≤−1.67; and0.04≤d1/TTL≤0.20;whereR1 denotes a curvature radius of the object-side surface of the first lens;R2 denotes a curvature radius of the image-side surface of the first lens; andd1 denotes an on-axis thickness 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: −8.47≤(R1+R2)/(R1−R2)≤−2.08; and0.06≤d1/TTL≤0.16.
5. The camera optical lens according to claim 1, wherein the second lens has a refractive power, an object-side surface of the second lens is convex in a paraxial region and an image-side surface of the second lens is concave in the paraxial region; and the camera optical lens further satisfies following conditions: −323.34≤f2/f≤2.00;−4.78≤(R3+R4)/(R3−R4)≤106.50; and0.02≤d3/TTL≤0.13;wheref2 denotes a focal length of the second lens;R3 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 an 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: −202.09≤f2/f≤1.60;−2.99≤(R3+R4)/(R3−R4)≤85.20; and0.03≤d3/TTL≤0.11.
7. The camera optical lens according to claim 1, wherein the third lens has a refractive power, an object-side surface of the third lens is concave in a paraxial region and an image-side surface of the third lens is convex in the paraxial region, and the camera optical lens further satisfies following conditions: −5.07≤f3/f≤12.63;−152.68≤(R5+R6)/(R5−R6)≤−1.68; and0.02≤d5/TTL≤0.08;whereR5 denotes a curvature radius of the 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 an 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: −3.17≤f3/f≤10.10;−95.43≤(R5+R6)/(R5−R6)≤−2.09; and0.03≤d5/TTL≤0.06.
9. The camera optical lens according to claim 1, wherein the fourth lens has a positive refractive power, and an object-side surface of the fourth lens is convex in a paraxial region, and the camera optical lens further satisfies following conditions: 0.59≤f4/f≤7.04;−40.06≤(R7+R8)/(R7−R8)≤−0.41; and0.03≤d7/TTL≤0.13;whereR7 denotes a curvature radius of the object-side surface of the fourth lens;R8 denotes a curvature radius of an image-side surface of the fourth lens;d7 denotes an on-axis thickness of the fourth lens; andTTL denotes a total optical length from an 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: 0.95≤f4/f≤5.63;−25.04≤(R7+R8)/(R7−R8)≤−0.51; and0.05≤d7/TTL≤0.11.
11. The camera optical lens according to claim 1, wherein the fifth lens has a refractive power, and the camera optical lens further satisfies following conditions: −6.21≤f5/f≤22.10;−10.32≤(R9+R10)/(R9−R10)≤0.96; and0.02≤d9/TTL≤0.08;wheref5 denotes a focal length of the fifth lens;R9 denotes a curvature radius of an object-side surface of the fifth lens;R10 denotes a curvature radius of an image-side surface of the fifth lens;d9 denotes an on-axis thickness of the fifth lens; andTTL denotes a total optical length from an 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: −3.88≤f5/f≤17.68;−6.45≤(R9+R10)/(R9−R10)≤0.76; and0.03≤d9/TTL≤0.07.
13. The camera optical lens according to claim 1, wherein the sixth lens has a positive refractive power, an object-side surface of the sixth lens is convex in a paraxial region and an image-side surface of the sixth lens is concave in the paraxial region, and the camera optical lens further satisfies following conditions: 0.83≤f6/f≤4.70;−10.65≤(R11+R12)/(R11−R12)≤−0.91; and0.03≤d11/TTL≤0.12;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 an 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: 1.33≤f6/f≤3.76;−6.66≤(R11+R12)/(R11−R12)≤−1.14; and0.04≤d11/TTL≤0.10.
15. The camera optical lens according to claim 1, wherein the seventh lens has a negative refractive power, and the camera optical lens further satisfies following conditions: −30.18≤f7/f≤−0.53; and0.03≤d13/TTL≤0.24;wheref7 denotes a focal length of the seventh lens;d13 denotes an on-axis thickness of the seventh lens; andTTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
16. The camera optical lens according to claim 15 further satisfying following condition: −18.86≤f7/f≤−0.66; and0.04≤d13/TTL≤0.20.
17. The camera optical lens according to claim 1, where a total optical length TTL from an 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 5.61 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 5.36 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 2.37.
20. The camera optical lens according to claim 19, wherein the F number of the camera optical lens is less than or equal to 2.32.

Priority Claims (1)

Number	Date	Country	Kind
201910581373.5	Jun 2019	CN	national

US Referenced Citations (1)

Number	Name	Date	Kind
8724232	Katsuragi	May 2014	B2

Related Publications (1)

	Number	Date	Country
	20200409058 A1	Dec 2020	US

Camera optical lens

Information

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Original Assignees

Examiners

Agents

CPC

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CPC

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Term Extension

Abstract

Description

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Priority Claims (1)

US Referenced Citations (1)

Related Publications (1)