Camera optical lens

TECHNICAL FIELD

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

BACKGROUND

With the emergence of smart phones in recent years, the demand for miniature camera optical lens is increasingly higher, but in general the photosensitive devices of camera optical lens are nothing more than Charge Coupled Devices (CCDs) or Complementary Metal-Oxide Semiconductor Sensors (CMOS sensors). 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 optical lenses with good imaging quality have become a mainstream in the market.

In order to obtain better imaging quality, the lens that is conventionally equipped in mobile phone cameras adopts a three-piece lens structure. However, with the development of technology and the increasingly diverse demands of users, the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is increasingly higher, a four-piece lens structure gradually emerges in lens designs. Although the common four-piece lens has good optical performance, its settings on refractive power, lens spacing and lens shape still have some deficiencies, which result in that the lens structure cannot have a good optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

SUMMARY

In view of the problems, the present disclosure provides a camera optical lens, which has high imaging performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

In an embodiment, the present disclosure provides a camera optical lens. The camera optical lens includes, from an object side to an image side, a first lens, a second lens, a third lens, and a fourth lens. The camera optical lens satisfies following conditions: 0.03≤R1/R2≤0.10; 1.00≤R3/R4≤1.50; 3.50≤R5/R6≤5.50; and 3.50≤d1/d2≤5.50, R1 denotes a curvature radius of an object side surface of the first lens; R2 denotes a curvature radius of an image side surface of the first lens; R3 denotes a curvature radius of an object side surface of the second lens; R4 denotes a curvature radius of an image side surface of the second lens; R5 denotes a curvature radius of an object side surface of the third lens; R6 denotes a curvature radius of an image side surface of the third lens; d1 denotes an on-axis thickness of the first lens; and d2 denotes an on-axis distance from the image side surface of the first lens to the object side surface of the second lens.

As an improvement, the camera optical lens further satisfies a following condition: −0.30≤f1/f2≤−0.20, where f1 denotes a focal length of the first lens; and f2 denotes a focal length of the second lens.

As an improvement, the camera optical lens further satisfies following conditions: 0.49≤f1/f≤1.74; −2.40≤(R1+R2)/(R1−R2)≤−0.71; and 0.08≤d1/TTL≤0.26, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies following conditions: −11.54≤f2/f≤−2.36; 2.52≤(R3+R4)/(R3−R4)≤1103.10; and 0.03≤d3/TTL≤0.10, where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; d3 denotes an on-axis thickness of the second lens; and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies following conditions: 0.25≤f3/f≤0.88; 0.72≤(R5+R6)/(R5−R6)≤2.70; and 0.11≤d5/TTL≤0.40, where f denotes a focal length of the camera optical lens; f3 denotes a focal length of the third lens; d5 denotes an on-axis thickness of the third lens; and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies following conditions: −1.17≤f4/f≤−0.33; 0.59≤(R7+R8)/(R7−R8)≤2.60; and 0.04≤d7/TTL≤0.18, where f denotes a focal length of the camera optical lens; f4 denotes a focal length of the fourth lens; R7 denotes a curvature radius of an 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; and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies a following condition: TTL/IH≤1.60, where IH denotes an image height of the camera optical lens; and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies a following condition: FNO≤2.20, where FNO denotes an F number of the camera optical lens.

As an improvement, the camera optical lens further satisfies a following condition: FOV≥78°, where FOV denotes a field of view of the camera optical lens.

As an improvement, the camera optical lens further satisfies a following condition: 0.57≤f12/f≤1.98, where f denotes a focal length of the camera optical lens; and f12 denotes a combined focal length of the first lens and the second lens.

The present disclosure has advantageous effects in that the camera optical lens according to the present disclosure has excellent optical characteristics and is ultra-thin, wide-angle and has a large aperture, making it especially suitable for camera optical lens assembly of mobile phones and WEB camera optical lenses formed by high-pixel camera elements such as CCD and CMOS.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a structural schematic diagram 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 structural schematic diagram 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 structural schematic diagram 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;

FIG. 13 is a structural schematic diagram of a camera optical lens according to Embodiment 4 of the present disclosure;

FIG. 14 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 13;

FIG. 15 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 13; and

FIG. 16 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 13.

DESCRIPTION OF IMPLEMENTATIONS

The present disclosure will hereinafter be described in detail with reference to several 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

The present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment 1 of the present disclosure. The camera optical lens 10 includes four lenses. For example, 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, and a fourth lens L4. In the present embodiment, as an example, an optical element such as a glass filter (GF) can be arranged between the fourth lens L4 and an image plane Si, and the glass fiber GF can be a glass plate or can be an optical filter. In other embodiments, the glass fiber GF can also be arranged at other positions.

In the present embodiment, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, and the fourth lens L4 has a negative refractive power.

In the present embodiment, a curvature radius of an 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, a curvature radius of an object side surface of the second lens L2 is defined as R3, and a curvature radius of an image side surface of the second lens L2 is defined as R4, a curvature radius of an object side surface of the third lens L3 is defined as R5, a curvature radius of an image side surface of the third lens L3 is defined as R6, an on-axis thickness of the first lens is defined as d1, and an on-axis distance from an image side surface of the first lens to an object side surface of the second lens is defined as d2. The camera optical lens 10 should satisfy following conditions:

0.03≤R1/R2≤0.10 (1);
1.00≤R3/R4≤1.50 (2);
3.50≤R5/R6≤5.50 (3); and
3.50≤d1/d2≤5.50 (4).

The condition (1) specifies a shape of the first lens. This condition is beneficial for the correction of spherical aberrations, so as to improve the imaging quality.

The condition (2) specifies a shape of the second lens. This condition is beneficial for reducing lens sensitivity and improving production yield.

The condition (3) specifies a shape of the third lens. This condition is beneficial for improving image quality.

When d1/d2 satisfies condition (4), the processing and assembly of lenses can be facilitated.

A focal length of the first lens L1 is defined as f1, and a focal length of the second lens L2 is defined as f2. The camera optical lens 10 should satisfy a condition of −0.30≤f1/f2≤−0.20. When f1/f2 meets such a condition, the focal lengths of the first and second lenses can be effectively allocated to correct aberration of an optical system, so as to improve the imaging quality.

In the present embodiment, the first lens L1 includes an object side surface being convex in a paraxial region, and an image side surface being concave in the paraxial region.

Here, a focal length of the first lens L1 is defined as f1, and the focal length of the camera optical lens 10 is defined as f. The camera optical lens 10 should satisfy a condition of 0.49≤f1/f≤1.74, which specifies a ratio of the refractive power of the first lens L1 to the focal length f of the system. When the condition is satisfied, the first lens L1 has an appropriate positive refractive power, thereby facilitating the reduction of aberrations of the system while facilitating development towards ultra-thin, wide-angle lenses. As an example, 0.78≤f1/f≤1.39.

A curvature radius of the object side surface of the first lens L1 is defined as R1, and a curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens 10 should satisfy a condition of −2.40≤(R1+R2)/(R1−R2)≤−0.71, control a shape of the first lens L1 in such a manner that the first lens L1 can effectively correct spherical aberrations of the system. As an example, −1.50≤(R1+R2)/(R1−R2)≤−0.89.

An on-axis thickness of the first lens L1 is defined as d1, and a total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.08≤d1/TTL≤0.26, which can achieve the ultra-thin lenses. As an example, 0.13≤d1/TTL≤0.21.

In the present embodiment, the second lens L2 includes the object side surface being convex in a paraxial region and the image side surface being concave in the paraxial region.

A focal length of the second lens L2 is defined as f2, and a focal length of the camera optical lens 10 is defined as f. The camera optical lens 10 should satisfy a condition of −11.54≤f2/f≤−2.36. By controlli9 ng the negative refractive power of the second lens L2 within an appropriate range, the aberration of the optical system can be advantageously corrected. As an example, −7.22≤f2/f≤−2.95.

A curvature radius of the object side surface of the second lens L2 is defined as R3, and a curvature radius of the image side surface of the second lens L2 is defined as R4. The camera optical lens 10 should satisfy a condition of 2.52≤(R3+R4)/(R3−R4)≤1103.10, which specifies a shape of the second lens L2. This condition can facilitate the correction of an on-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 4.03≤(R3+R4)/(R3−R4)≤882.48.

An on-axis thickness of the second lens L2 is defined as d3, and the total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.03≤d3/TTL≤0.10, which can achieve the ultra-thin lenses. As an example, 0.04≤d3/TTL≤0.08.

In the present embodiment, the third lens L3 includes the object side surface being concave in a paraxial region and the image side surface being convex in the paraxial region.

A focal length of the third lens L3 is defined as f3, and the focal length of the camera optical lens 10 is defined as f. The camera optical lens 10 further satisfies a condition of 0.25≤f3/f≤0.88. The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity of the system. As an example, 0.40≤f3/f≤0.71.

A curvature radius of the object side surface of the third lens L3 is defined as R5, and a curvature radius of the image side surface of the third lens L3 is defined as R6. The camera optical lens 10 should satisfy a condition of 0.72≤(R5+R6)/(R5−R6)≤2.70, which specifies a shape of the third lens L3, thereby facilitating shaping of the third lens L3. This condition can alleviate the deflection of light passing through the lens while effectively reducing aberrations. As an example, 1.16≤(R5+R6)/(R5−R6)≤2.16.

An on-axis thickness of the third lens L3 is defined as d5, and the total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.11≤d5/TTL≤0.40, which can achieve the ultra-thin lenses. As an example, 0.18≤d5/TTL≤0.32.

In the present embodiment, the fourth lens L4 includes the object side surface being convex in a paraxial region and the image side surface being concave in the paraxial region.

A focal length of the fourth lens L4 is f4, and the focal length of the camera optical lens 10 is f. The camera optical lens 10 further satisfies a condition of −1.17≤f4/f≤−0.33, which specifies a ratio of the focal length f4 of the fourth lens L4 to the focal length of the system. This condition can facilitate the improvement of an optical performance of the system. As an example, −0.73≤f4/f≤−0.41.

A curvature radius of the object side surface of the fourth lens L4 is defined as R7, and a curvature radius of the image side surface of the fourth lens L4 is defined as R8. The camera optical lens 10 should satisfy a condition of 0.59≤(R7+R8)/(R7−R8)≤2.60, which specifies a shape of the fourth lens L4. This condition can facilitate the correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 0.94≤(R7+R8)/(R7−R8)≤2.08.

An on-axis thickness of the fourth lens L4 is defined as d7, and the total optical length from the object side surface of the first lens L 1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.04≤d7/TTL≤0.18, which can achieve the ultra-thin lenses. As an example, 0.06≤d7/TTL≤0.14.

In the present embodiment, an image height of the camera optical lens 10 is defined as IH, and the total optical length of the camera optical lens 10 is defined as TTL. The camera optical lens 10 should satisfy a condition of TTL/IH≤1.60, which can achieve the ultra-thin lenses.

In the present embodiment, an F number (FNO) of the camera optical lens 10 is smaller than or equal to 2.20, thereby achieving a large aperture and high imaging performance.

In the present embodiment, a FOV (field of view) of the camera optical lens 10 is larger than or equal to 78°, thereby achieving the wide-angle performance.

In the present embodiment, the focal length of the camera optical lens 10 is defined as f, and a combined focal length of the first lens L1 and the second lens L2 is defined as f12. The camera optical lens 10 should satisfy a condition of 0.57≤f12/f≤1.98. This condition can eliminate aberration and distortion of the camera optical lens 10, suppress the back focal length of the camera optical lens 10, and maintain the miniaturization of the camera lens system group. As an example, 0.91≤f12/f≤1.58.

When the above conditions are satisfied, the camera optical lens 10 will have good optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures. With these characteristics, the camera optical lens 10 is especially suitable for camera optical lens assembly of mobile phones and WEB camera optical lenses formed by high-pixel imaging elements such as CCD and CMOS.

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: total optical length (total optical length from the object side surface of the first lens L1 to the image plane of the camera optical lens along the optic axis) in units of mm.

In an example, inflexion points and/or arrest points can be arranged on the object side surface and/or image side surface of the lens, in order to satisfy the demand for the high quality imaging. The specific implementations are described below.

Table 1 and Table 2 shows design data of the camera optical lens 10 according to Embodiment 1 of the present disclosure.

TABLE 1

R
d
nd
νd

S1
∞
d0=
−0.075

R1
1.614
d1=
0.625
nd1
1.5444
ν1
55.82

R2
28.480
d2=
0.133

R3
2.440
d3=
0.238
nd2
1.6610
ν2
20.53

R4
1.836
d4=
0.343

R5
−3.403
d5=
0.801
nd3
1.5444
ν3
55.82

R6
−0.756
d6=
0.062

R7
2.684
d7=
0.367
nd4
1.5444
ν4
55.82

R8
0.618
d8=
0.656

R9
∞
d9=
0.210
ndg
1.5168
νg
64.17

R10
∞
d10=
0.225

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

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

S1: aperture;

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 an object side surface of the optical filter GF;

R10: 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 adjacent lenses;

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 optical filter GF;

d9: on-axis thickness of the optical filter GF;

d10: on-axis distance from the image side surface of the optical filter GF to the image plane;

nd: refractive index of d line;

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

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

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

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

ndg: refractive index of 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;

vg: abbe number of the optical filter GF.

Table 2 shows aspheric surface data of respective lens in the camera optical lens 10 according to Embodiment 1 of the present disclosure.

TABLE 2

Conic coefficient
Aspherical coefficient

k
A4
A6
A8
A10

R1
−4.7456E+00
1.9601E−01
−3.0798E+00
4.0655E+01
−3.2583E+02

R2
−9.9000E+01
−3.2137E−01
−3.1191E+00
4.0410E+01
−2.6958E+02

R3
−2.3889E+01
−9.4669E−03
−7.8877E+00
1.0014E+02
−7.5149E+02

R4
1.7406E+00
6.7436E−02
−4.7074E+00
4.1513E+01
−2.2484E+02

R5
1.1871E+01
−1.6529E−02
2.0777E+00
−2.1371E+01
1.1231E+02

R6
−1.8758E+00
2.2745E−01
−4.9710E−01
−7.3607E−01
5.6554E+00

R7
−9.8041E+01
−4.3100E−01
4.0269E−01
−4.1323E−01
4.8153E−01

R8
−4.9533E+00
−3.3625E−01
4.1741E−01
−4.2303E−01
3.0415E−01

Aspherical coefficient

A12
A14
A16
A18
A20

R1
1.5700E+03
−4.5940E+03
7.9010E+03
−7.2237E+03
2.6319E+03

R2
1.0693E+03
−2.5686E+03
3.6201E+03
−2.7005E+03
7.9397E+02

R3
3.5112E+03
−1.0206E+04
1.7933E+04
−1.7419E+04
7.1735E+03

R4
7.9762E+02
−1.8284E+03
2.6007E+03
−2.0816E+03
7.1523E+02

R5
−3.5320E+02
6.9260E+02
−8.2963E+02
5.5588E+02
−1.5997E+02

R6
−1.3142E+01
1.6852E+01
−1.2328E+01
4.7758E+00
−7.5972E−01

R7
−3.5519E−01
1.5215E−01
−3.7678E−02
5.0453E−03
−2.8408E−04

R8
−1.4769E−01
4.6671E−02
−9.0780E−03
9.7511E−04
−4.3649E−05

In Table 2, 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−(1+k)(x²/R²)]^1/2}+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶+A18x¹⁸+A20x²⁰ (5)

It should be noted that in the present embodiment, an aspheric surface of each lens uses the aspheric surfaces represented by the above condition (5). However, a specific form of the condition (5) is only an example, and it is not limited to the aspherical polynomial form represented by the condition (5).

Table 3 and Table 4 show design data of inflexion points and arrest points of respective lens in the camera optical lens 10 according to the present embodiment of the present disclosure. P1R1 and P2R2 represent the object side surface and the image side surface of the first lens L1, respectively; P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, respectively; P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, respectively; and P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, respectively. The data in the column “inflexion point position” indicates 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 “arrest point position” indicates vertical distances from arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
1
0.585

P1R2
1
0.095

P2R1
2
0.275
0.595

P2R2
0

P3R1
0

P3R2
2
0.795
1.105

P4R1
2
0.205
0.945

P4R2
2
0.395
1.865

TABLE 4

Number of
Arrest point
Arrest point

Arrest points
position 1
position 2

P1R1
0

P1R2
1
0.145

P2R1
2
0.545
0.635

P2R2
0

P3R1
0

P3R2
0

P4R1
2
0.385
1.425

P4R2
1
1.075

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm after passing the camera optical lens 10 according to Embodiment 1. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 10 according to Embodiment 1, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

The following Table 17 below further lists various values of Embodiments 1, 2, 3 and 4, and parameters which are specified in the above conditions.

As shown in Table 17, Embodiment 1 satisfies the respective conditions.

In the present embodiment, the entrance pupil diameter of the camera optical lens 10 is 1.249 mm. The image height is 2.300 mm. The FOV along a diagonal direction is 78.30°. Thus, the camera optical lens 10 is an ultra-thin, large-aperture, wide-angle lens in which the on-axis and off-axis aberrations are sufficiently corrected, thereby leading to better optical characteristics.

Embodiment 2

FIG. 5 is a structural schematic diagram of a camera optical lens 20 according to Embodiment 2. Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1. 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=
−0.090

R1
1.350
d1=
0.602
nd1
1.5444
ν1
55.82

R2
14.978
d2=
0.110

R3
3.518
d3=
0.240
nd2
1.6610
ν2
20.53

R4
2.354
d4=
0.281

R5
−2.502
d5=
0.809
nd3
1.5444
ν3
55.82

R6
−0.713
d6=
0.035

R7
8.628
d7=
0.428
nd4
1.5444
ν4
55.82

R8
0.715
d8=
0.656

R9
∞
d9=
0.210
ndg
1.5168
νg
64.17

R10
∞
d10=
0.186

Table 6 shows aspheric surface data of respective lenses in the camera optical lens 20 according to Embodiment 2 of the present disclosure.

TABLE 6

Conic coefficient
Aspherical coefficient

k
A4
A6
A8
A10

R1
−3.5568E+00
−6.5389E−02
4.4068E+00
−5.8114E+01
4.4982E+02

R2
7.5895E+01
−3.1134E−01
−1.2886E+00
1.3011E+01
−8.1693E+01

R3
−3.1111E+01
−2.9060E−01
3.5436E−01
−8.5204E+00
7.1513E+01

R4
5.2772E+00
−1.2928E−01
6.6491E−01
−9.0156E+00
6.5773E+01

R5
7.1568E+00
3.8124E−01
−5.3452E+00
5.3227E+01
−3.3426E+02

R6
−2.1256E+00
3.7767E−01
−2.1796E+00
6.9717E+00
−1.4763E+01

R7
−9.6922E+01
−4.6913E−01
5.0066E−01
−4.7959E−01
5.7073E−01

R8
−5.8244E+00
−2.7393E−01
2.9433E−01
−2.4088E−01
1.2822E−01

Aspherical coefficient

A12
A14
A16
A18
A20

R1
−2.1972E+03
6.8046E+03
−1.2980E+04
1.3925E+04
−6.4365E+03

R2
3.2218E+02
−7.7764E+02
1.0769E+03
−7.3443E+02
1.5512E+02

R3
−3.1456E+02
8.4641E+02
−1.3995E+03
1.3190E+03
−5.4651E+02

R4
−2.7696E+02
7.3947E+02
−1.2368E+03
1.1810E+03
−4.8838E+02

R5
1.3316E+03
−3.3403E+03
5.1210E+03
−4.3885E+03
1.6120E+03

R6
2.0791E+01
−1.8117E+01
9.1936E+00
−2.4650E+00
2.6723E−01

R7
−4.9394E−01
2.5965E−01
−8.0323E−02
1.3527E−02
−9.5598E−04

R8
−3.8919E−02
3.9037E−03
1.1928E−03
−3.9092E−04
3.3019E−05

Table 7 and Table 8 show design data of inflexion points and arrest points of respective lens in the camera optical lens 20 according to the present embodiment of the present disclosure.

TABLE 7

Number of
Inflexion
Inflexion
Inflexion
Inflexion

inflexion
point
point
point
point

points
position 1
position 2
position 3
position 4

P1R1
1
0.595

P1R2
1
0.135

P2R1
2
0.255
0.615

P2R2
0

P3R1
1
0.735

P3R2
1
0.715

P4R1
4
0.145
0.885
1.405
1.555

P4R2
1
0.405

TABLE 8

Number of Arrest points
Arrest point position 1

P1R1
0

P1R2
1
0.215

P2R1
1
0.455

P2R2
0

P3R1
0

P3R2
0

P4R1
1
0.255

P4R2
1
1.095

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 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. In FIG. 8, a field curvature S is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

Table 13 below lists various values of Embodiments 1, 2, 3 and 4, and parameters which are specified in the above conditions.

As shown in Table 17, Embodiment 2 satisfies the respective conditions.

In the present embodiment, the entrance pupil diameter of the camera optical lens is 1.248 mm. The image height is 2.300 mm. The FOV along a diagonal direction is 78.00°. Thus, the camera optical lens 10 is an ultra-thin, large-aperture, wide-angle lens, thereby leading to better optical characteristics.

Embodiment 3

FIG. 9 is a structural schematic diagram of a camera optical lens 30 according to Embodiment 3. Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1. Only differences therebetween will be described in the following.

Table 10 shows aspheric surface data of respective lenses in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.051

R1
1.539
d1=
0.578
nd1
1.5444
ν1
55.82

R2
50.298
d2=
0.165

R3
2.905
d3=
0.223
nd2
1.6610
ν2
20.53

R4
1.942
d4=
0.265

R5
−3.740
d5=
0.971
nd3
1.5444
ν3
55.82

R6
−0.680
d6=
0.058

R7
1.865
d7=
0.283
nd4
1.5444
ν4
55.82

R8
0.499
d8=
0.656

R9
∞
d9=
0.210
ndg
1.5168
νg
64.17

Table 10 shows aspheric surface data of respective lenses in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 10

Conic coefficient
Aspherical coefficient

k
A4
A6
A8
A10

R1
−4.5903E+00
5.3050E−02
1.1770E+00
−1.9486E+01
1.6555E+02

R2
8.8687E+01
−3.2712E−01
5.9697E−02
−7.2322E−01
5.4022E+00

R3
−3.2610E+01
−2.4926E−01
−4.3960E−01
1.0662E+00
2.7497E+00

R4
1.8566E+00
−1.4446E−01
−9.8019E−01
7.9962E+00
−4.1005E+01

R5
1.2924E+01
1.3244E−01
−7.2995E−01
4.3806E+00
−2.2857E+01

R6
−2.3574E+00
4.0736E−01
−1.7900E+00
4.1676E+00
−6.1224E+00

R7
−6.3000E+01
−3.6239E−01
2.8533E−01
−2.5296E−01
3.1229E−01

R8
−4.7060E+00
−3.0628E−01
3.5475E−01
−3.3692E−01
2.3357E−01

Aspherical coefficient

A12
A14
A16
A18
A20

R1
−8.6833E+02
2.8366E+03
−5.6299E+03
6.2122E+03
−2.9242E+03

R2
−2.3706E+01
6.6976E+01
−1.2622E+02
1.4677E+02
−7.7778E+01

R3
−1.5906E+01
4.4076E+01
−8.6060E+01
1.1056E+02
−6.4668E+01

R4
1.4992E+02
−3.5369E+02
5.0476E+02
−3.9421E+02
1.2924E+02

R5
8.6520E+01
−2.1037E+02
3.1379E+02
−2.6304E+02
9.4816E+01

R6
5.5151E+00
−2.3804E+00
−5.3365E−02
4.0452E−01
−9.8102E−02

R7
−2.4061E−01
1.0510E−01
−2.6270E−02
3.5338E−03
−1.9935E−04

R8
−1.1153E−01
3.5168E−02
−6.9173E−03
7.6425E−04
−3.6132E−05

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

TABLE 11

Number of
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3

P1R1
1
0.575

P1R2
1
0.075

P2R1
2
0.265
0.615

P2R2
0

P3R1
1
0.795

P3R2
2
0.775
1.185

P4R1
3
0.235
0.955
1.785

P4R2
1
0.385

TABLE 12

Number of
Arrest point
Arrest point

Arrest points
position 1
position 2

P1R1
0

P1R2
1
0.125

P2R1
2
0.475
0.705

P2R2
0

P3R1
0

P3R2
0

P4R1
2
0.465
1.365

P4R2
1
1.165

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates field curvature and distortion of light with a wavelength of 555 nm after passing the camera optical lens 30 according to Embodiment 3. In FIG. 12, a field curvature S is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

Table 17 below lists various values of Embodiments 1, 2, 3 and 4, and parameters which are specified in the above conditions.

As shown in Table 17, Embodiment 3 satisfies the respective conditions.

In the present embodiment, the entrance pupil diameter of the camera optical lens is 1.332 mm. The image height is 2.300 mm. The FOV along a diagonal direction is 78.50°. Thus, the camera optical lens 10 is an ultra-thin, large-aperture, wide-angle lens in which the on-axis and off-axis aberrations are sufficiently corrected, thereby leading to better optical characteristics.

Embodiment 4

FIG. 13 is a structural schematic diagram of a camera optical lens 40 according to Embodiment 4. Embodiment 4 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1. Only differences therebetween will be described in the following.

Table 13 and Table 14 show design data of a camera optical lens 40 in Embodiment 4 of the present disclosure.

TABLE 13

R
d
nd
νd

S1
∞
d0=
−0.076

R1
1.620
d1=
0.632
nd1
1.5444
ν1
55.82

R2
26.783
d2=
0.115

R3
1.841
d3=
0.204
nd2
1.6610
ν2
20.53

R4
1.836
d4=
0.360

R5
−3.432
d5=
0.816
nd3
1.5444
ν3
55.82

R6
−0.756
d6=
0.049

R7
2.570
d7=
0.358
nd4
1.5444
ν4
55.82

R8
0.616
d8=
0.656

R9
∞
d9=
0.210
ndg
1.5168
νg
64.17

R10
∞
d10=
0.246

Table 14 shows aspheric surface data of respective lenses in the camera optical lens 40 according to Embodiment 4 of the present disclosure.

TABLE 14

Conic coefficient
Aspherical coefficient

k
A4
A6
A8
A10

R1
−4.3685E+00
1.9922E−01
−3.0862E+00
4.0646E+01
−3.2582E+02

R2
−6.9958E+01
−3.2355E−01
−3.0670E+00
4.0409E+01
−2.6972E+02

R3
−1.6696E+01
−2.3520E−04
−7.8980E+00
1.0013E+02
−7.5143E+02

R4
1.6060E+00
5.9939E−02
−4.7097E+00
4.1513E+01
−2.2485E+02

R5
1.1777E+01
−1.7998E−02
2.0807E+00
−2.1367E+01
1.1231E+02

R6
−1.8905E+00
2.3114E−01
−4.9481E−01
−7.3482E−01
5.6560E+00

R7
−8.6267E+01
−4.3105E−01
4.0265E−01
−4.1325E−01
4.8152E−01

R8
−4.8848E+00
−3.3674E−01
4.1734E−01
−4.2303E−01
3.0415E−01

Aspherical coefficient

A12
A14
A16
A18
A20

R1
1.5701E+03
−4.5938E+03
7.9014E+03
−7.2249E+03
2.6273E+03

R2
1.0691E+03
−2.5684E+03
3.6215E+03
−2.6983E+03
7.8667E+02

R3
3.5114E+03
−1.0206E+04
1.7933E+04
−1.7420E+04
7.1707E+03

R4
7.9762E+02
−1.8285E+03
2.6006E+03
−2.0816E+03
7.1556E+02

R5
−3.5319E+02
6.9260E+02
−8.2963E+02
5.5587E+02
−1.5998E+02

R6
−1.3141E+01
1.6852E+01
−1.2328E+01
4.7758E+00
−7.5977E−01

R7
−3.5519E−01
1.5216E−01
−3.7678E−02
5.0453E−03
−2.8411E−04

R8
−1.4769E−01
4.6671E−02
−9.0780E−03
9.7511E−04
−4.3651E−05

Table 15 and Table 16 show design data of inflexion points and arrest points of respective lens in the camera optical lens 40 according to the present embodiment of the present disclosure.

TABLE 15

Number of
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3

P1R1
1
0.595

P1R2
1
0.095

P2R1
3
0.285
0.605
0.685

P2R2
0

P3R1
0

P3R2
2
0.785
1.145

P4R1
2
0.215
0.945

P4R2
2
0.395
1.865

TABLE 16

Number of
Arrest point
Arrest point

Arrest points
position 1
position 2

P1R1
0

P1R2
1
0.155

P2R1
0

P2R2
0

P3R1
0

P3R2
0

P4R1
2
0.405
1.405

P4R2
1
1.075

FIG. 14 and FIG. 15 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 430 nm after passing the camera optical lens 40 according to Embodiment 4. FIG. 16 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 40 according to Embodiment 4. In FIG. 16, a field curvature S is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

The following Table 17 shows various values in examples 1, 2, 3, and 4, and values corresponding to parameters specified in the conditions.

As shown in Table 17, Embodiment 4 satisfies the respective conditions.

In the present embodiment, the entrance pupil diameter of the camera optical lens is 1.237 mm. The image height is 2.300 mm. The FOV along a diagonal direction is 78.50°. Thus, the camera optical lens 10 is an ultra-thin, large-aperture, wide-angle lens, thereby leading to better optical characteristics.

The following Table 17 lists values of the corresponding relational expressions in Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4, and parameters according to the above conditions.

TABLE 17

Parameters and
Embodi-
Embodi-
Embodi-
Embodi-

conditions
ment 1
ment 2
ment 3
ment 4

R1/R2
0.06
0.09
0.03
0.06

R3/R4
1.33
1.49
1.50
1.00

R5/R6
4.50
3.51
5.50
4.54

d1/d2
4.70
5.47
3.50
5.50

f
2.748
2.745
2.735
2.720

f1
3.107
2.675
2.895
3.156

f2
−13.211
−11.623
−9.682
−15.700

f3
1.607
1.574
1.369
1.604

f4
−1.569
−1.456
−1.346
−1.594

f12
3.616
3.123
3.602
3.573

Fno
2.20
2.20
2.20
2.20

Fno is an F number of the camera optical lens.

Those skilled in the art can understand that the above are some of the embodiments of the present disclosure. In practice, those skilled in the art can make various modifications in terms of forms and details without departing from the spirit and scope of the present disclosure.

Camera optical lens

Information

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Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

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CPC

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Term Extension

Abstract

Description

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