CAMERA OPTICAL LENS

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

Smart phones are developing and getting popularized fast, and development and design of cameras follow. As the current development trend of electronic products goes towards better functions and thinner and smaller dimensions, miniature camera lenses with good imaging quality is becoming a mainstream (in the market.

In order to obtain better imaging quality, a mini-lens that is traditionally equipped in a mobile phone camera adopts a three-piece or four-piece and even five-piece lens structure. Although a lens as such has good optical functions, the lens is fairly unreasonable in terms of setting of focal length and lens shape, rendering that the lens structure with good optical functions can not satisfy a design requirement of large aperture, ultra-thinness and wide angle.

SUMMARY

To address the above issues, the present disclosure seeks to provide a camera optical lens that satisfies a design requirement of large aperture, ultra-thinness and wide angle while having good optical functions.

The technical solutions of the present disclosure are as follows:

A camera optical lens including, from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power; wherein the camera optical lens satisfies following conditions:

−0.50≤f1/f2≤−0.35;

5.00≤f3/f≤14.00;

−3.10≤(f2+f5)/f≤−2.40;

3.00≤(R3+R4)/(R3−R4)≤4.00;

1.20≤(R7+R8)/(R7−R8)≤1.30; and

0.25≤(R9+R10)/(R9−R10)≤0.65;

where f 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; f3 denotes a focal length of the third lens; f5 denotes a focal length of the fifth 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; 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; R9 denotes a curvature radius of an object-side surface of the fifth lens; and R10 denotes a curvature radius of an image-side surface of the fifth lens.

As an improvement, the camera optical lens further satisfies the following condition:

−2.60≤f2/f≤−1.90.

As an improvement, the camera optical lens further satisfies the following condition:

0.06≤d1/TTL≤0.20;

−3.37≤(R1+R2)/(R1−R2)≤−1.01; and

0.46≤f1/f≤1.40;

where d1 denotes an on-axis thickness of the first lens; TTL 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; R1 denotes a curvature radius of an object-side surface of the first lens; and R2 denotes a curvature radius of an image-side surface of the first lens.

As an improvement, the camera optical lens further satisfies the following condition:

0.03≤d3/TTL≤0.08;

where d3 denotes an on-axis thickness of the second lens; and TTL 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.

As an improvement, the camera optical lens according to claim 1 further satisfies the following conditions:

0.04≤d5/TTL≤0.16; and

0.55≤(R5+R6)/(R5−R6)≤5.17;

where d5 denotes an on-axis thickness of the third lens; TTL 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; R5 denotes a curvature radius of an object-side surface of the third lens; and R6 denotes a curvature radius of an image-side surface of the third lens.

As an improvement, the camera optical lens according further satisfies the following conditions:

0.06≤d7/TTL≤0.18; and

0.29≤f4/f≤1.04;

where d7 denotes an on-axis thickness of the fourth lens, TTL 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; and f4 denotes a focal length of the fourth lens.

As an improvement, the camera optical lens further satisfies the following conditions:

0.04≤d9/TTL≤0.12; and

−1.08≤f5/f≤−0.32;

where d9 denotes an on-axis thickness of the fifth lens, and TTL 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.

As an improvement, the camera optical lens further satisfies the following condition:

FNO≤2.11;

where FNO denotes an F number of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following conditions:

FOV≥78;

where FOV denotes a field of view of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following condition:

TTL/IH≤1.45;

where TTL 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; and IH denotes an image height of the camera optical lens.

The present disclosure is advantageous in: through the above lens configuration, the camera optical lens in the present disclosure has good optical functions and has characteristics of large aperture, wide angle and ultra-thinness, and is especially fit for WEB camera lenses and mobile phone camera lens assemblies composed by such camera elements as CCD and CMOS for high pixels.

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.

FIG. 13 is a schematic diagram of a structure 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.

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

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

FIG. 1 shows the camera optical lens 10 of Embodiment 1 of the present disclosure, the camera optical lens 10 includes five 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 and a fifth lens L5. In this embodiment, an optical element such as an optical filter GF is arranged between the fifth lens L5 and an image surface Si. Herein, the optical filter GF may either be a glass cover plate or be an optical filter. Alternatively, the optical filter GF may further be arranged at another position in another embodiment.

In this embodiment, the first lens L1 has a positive refractive power, an object-side surface of the first lens L1 is convex and an image-side surface of the first lens L1 is concave; the second lens L2 has a negative refractive power, an object-side surface of the second lens L2 is convex and an image-side surface of the second lens L2 is concave; the third lens L3 has a positive refractive power, an object-side surface of the third lens L3 is concave and an image-side surface of the third lens L3 is convex; the fourth lens L4 has a positive refractive power, an object-side surface of the fourth lens L4 is concave and an image-side surface of the fourth lens L4 is convex; the fifth lens L5 has a negative refractive power, an object-side surface of the fifth lens L5 is concave and an image-side surface of the fifth lens L5 is concave.

Here, a focal length of the first lens L1 is defined as f1, a focal length of the second lens L2 is defined as f2, and the camera optical lens 10 satisfies the following condition: −0.50≤f1/f2≤−0.35, which specifies a ratio between the focal length of the first lens L1 and the focal length of the second lens L2. Within the range, a spherical aberration and field curvature quantity of the camera optical lens may be effectively balanced.

A focal length of the camera optical lens 10 is defined as f, a focal length of the third lens L3 is defined as f3, and the camera optical lens 10 satisfies the following condition: 5.00≤f3/f≤14.00, which specifies a ratio between the focal length of the third lens L3 and a focal length of the camera optical lens 10, through which and a reasonable distribution in focal length the camera optical lens 10 has better imaging quality and lower sensitivity.

A focal length of the fifth lens L5 is f5, and the camera optical lens 10 satisfies the following condition: −3.10≤f2+f5)/f≤−2.40, which specifies a ratio between a sum of focal length of the second lens L2 and fifth lens L5 and the focal length of the camera optical lens 10. Within the range, it helps improve functions of the camera optical lens 10.

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 satisfies the following condition: 3.00≤(R3+R4)/(R3−R4)≤4.00, which specifies a shape of the second lens L2. Within the range, it helps correct an on-axis aberration.

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 satisfies the following condition: 1.20≤(R7+R8)/(R7−R8)≤1.30, which specifies a shape of the fourth lens L4. Within the range, it may soften refraction of light that passes through the lens, thereby effectively reducing aberration.

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 satisfies the following condition: 0.25≤(R9+R10)/(R9−R10)≤0.65, which specifies a shape of the fifth lens L5. Within the range, it helps correct an off-axis aberration.

In this embodiment, through configuration of the lens as described above, i.e., by using lenses (L1, L2, L3, L4 and L5) with varied refractive powers, setting the ratio between the focal lengths of the first lens L1 and second lens L2, the ratio between the focal lengths of the third lens L3 and camera optical lens 10, the ratio between the sum of the focal lengths of the second lens L2 and fifth lens L5 and the focal length of the camera optical lens 10, and by defining shapes of the second lens L2, fourth lens L4 and fifth lens L5, it helps improving functions of the camera optical lens 10 and satisfying the design requirement of ultra-thinness and wide angle.

The camera optical lens 10 further satisfies the following condition: −2.60≤f2/f≤−1.90, which specifies a ratio between the focal length of the second lens L2 and the focal length of the camera optical lens 10, through which and a reasonable distribution in focal length the camera optical lens 10 has better imaging quality and lower sensitivity.

An on-axis thickness of the first lens L1 is defined as d1, a total optical length from the object-side surface of the first lens to an image surface Si of the camera optical lens 10 along an optical axis is defined as TTL, and the camera optical lens 10 satisfies the following condition: 0.06≤d1/TTL≤0.20, which helps realizing ultra-thinness.

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 satisfies the following condition: −3.37≤(R1+R2)/(R1−R2)≤−1.01. A reasonable control of a shape of the first lens L1 enables the first lens L1 to effectively correct the spherical aberration of the camera optical lens 10.

The camera optical lens 10 further satisfies the following condition: 0.46≤f1/f≤1.40, within a range of which the first lens L1 has an appropriate positive refractive power, which helps reducing the spherical aberration of the camera optical lens 10 and lenses development towards ultra-thinness and wide angle.

An on-axis thickness of the second lens L2 is defined as d3, the total optical length from the object-side surface of the first lens to the image surface Si of the camera optical lens 10 along the optical axis is defined as TTL, and the camera optical lens 10 satisfies the following condition: 0.03≤d3/TTL≤0.08, which helps realizing ultra-thinness.

An on-axis thickness of the third lens L3 is defined as d5, and the camera optical lens 10 satisfies the following condition: 0.04≤d5/TTL≤0.16, which helps realizing ultra-thinness.

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 satisfies the following condition: 0.55≤(R5+R6)/(R5−R6)≤5.17, which specifies a shape of the third lens L3. Within the range, it may soften refraction of light that passes through the lens, thereby effectively reducing aberration.

An on-axis thickness of the fourth lens L4 is defined as d7, and the camera optical lens 10 satisfies the following condition: 0.06≤d7/TTL≤0.18, which helps realizing ultra-thinness.

A focal length of the fourth lens L4 is f4, and the camera optical lens 10 satisfies the following condition: 0.29≤f4/f≤1.04, which specifies a ratio between the focal length of the fourth lens L4 and the focal length of the camera optical lens 10. Within the range, it helps improve functions of the camera optical lens 10.

An on-axis thickness of the fifth lens L5 is defined as d9, and the camera optical lens 10 satisfies the following condition: 0.04≤d9/TTL≤0.12, which helps realizing ultra-thinness.

The camera optical lens 10 satisfies the following condition: −1.08≤f5/f≤−0.32. The definition on the fifth lens L5 may effectively make a light angle of the camera optical lens 10 more even, thereby reducing tolerance sensitivity.

In this embodiment, an F number of the camera optical lens 10 is FNO, which satisfies the following condition: FNO≤1.90, in a case of which the camera optical lens 10 has a large aperture and good imaging functions.

A field of view of the camera optical lens 10 is defined as FOV, and the camera optical lens 10 satisfies the following condition: FOV≥78, which specifies a range of the field of view of the camera optical lens 10, so that the camera optical lens 10 has a greater field of view and good imaging functions.

The total optical length from the object-side surface of the first lens to the image surface Si of the camera optical lens 10 along the optical axis is defined as TTL, an image height of the camera optical lens 10 is defined as IH, and the camera optical lens 10 satisfies the following condition: TTL/IH≤1.45, which specifies a ratio between the total optical length of the camera optical lens 10 and an image height, which helps realizing ultra-thinness.

Based on this design, TTL of the camera optical lens 10 is as short as possible, thereby maintaining a miniaturization characteristic.

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.

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.

FIG. 1 is a schematic diagram of a structure of the camera optical lens 10 according to Embodiment 1 of the present disclosure. The design data of the camera optical lens 10 in Embodiment 1 of the present disclosure are shown in the following.

Table 1 lists object-side and image-side curvature radiuses R, on-axis thicknesses of lenses, distance d between lenses, refraction indexes nd and abbe numbers vd of the first to fifth lenses L1 to L5 that forms the camera optical lens 10 in Embodiment 1 of the present disclosure. Table 2 lists conic coefficient k and aspheric surface coefficients of the camera optical lens 10. It shall be noted that in this embodiment, units of distance, radius and thickness are millimeter (mm).

TABLE 1

R
d
nd
νd

S1
∞
d0=
−0.280

R1
1.353
d1=
0.551
nd1
1.5444
ν1
55.82

R2
5.293
d2=
0.055

R3
5.602
d3=
0.225
nd2
1.6700
ν2
19.39

R4
2.817
d4=
0.314

R5
−26.701
d5=
0.415
nd3
1.5444
ν3
55.82

R6
−7.842
d6=
0.439

R7
−11.570
d7=
0.493
nd4
1.5444
ν4
55.82

R8
−1.194
d8=
0.311

R9
−2.768
d9=
0.305
nd5
1.5438
ν5
56.03

R10
1.475
d10=
0.410

R11
∞
d11=
0.210
ndg
1.5168
νg
64.21

R12
∞
d12=
0.348

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

R: curvature radius of an optical surface;

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 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 an object-side surface of the optical filter GF;

R12: curvature radius of an image-side surface of the optical filter GF;

d: on-axis thickness of a lens or on-axis distance between neighboring 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 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 image-side surface of the optical filter GF;

d11: on-axis thickness of the optical filter GF;

d12: on-axis distance from the image-side surface to the image surface Si 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;

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;

vg: abbe number of the optical filter GF.

TABLE 2

Conic

coefficient
Aspheric surface coefficients

k
A4
A6
A8
A10

R1
−3.0314E−01
3.0600E−02
−2.3962E−01
1.6485E+00
−5.5512E+00

R2
−4.7657E+00
−3.4804E−01
1.0174E+00
−4.1160E+00
1.9958E+01

R3
−1.2890E+01
−4.1584E−01
1.0066E+00
−1.2386E+00
4.2274E+00

R4
−3.7930E+00
−7.1795E−02
−1.1960E+00
1.7681E+01
−1.0560E+02

R5
3.7357E+01
−2.9090E−01
1.2453E+00
−1.4257E+01
8.8705E+01

R6
5.8050E+01
−2.1141E−01
5.7339E−01
−5.0037E+00
2.1613E+01

R7
−5.3322E+01
1.1562E−02
−1.8591E−01
2.4349E−01
−6.5914E−01

R8
−7.0709E+00
−1.3718E−01
2.6689E−01
−4.9286E−01
5.3386E−01

R9
−3.4691E+00
−1.6994E−01
−8.0420E−02
2.6877E−01
−1.9687E−01

R10
−9.9725E+00
−1.9283E−01
1.3353E−01
−6.6048E−02
2.2867E−02

Aspheric surface coefficients

A12
A14
A16
A18
A20

R1
1.0126E+01
−9.7493E+00
4.0226E+00
4.0277E−02
−3.2992E−01

R2
−6.5891E+01
1.3062E+02
−1.5094E+02
9.3518E+01
−2.3946E+01

R3
−1.8616E+01
4.2403E+01
−4.9054E+01
2.7158E+01
−5.4627E+00

R4
3.7426E+02
−8.2081E+02
1.0887E+03
−7.9764E+02
2.4788E+02

R5
−3.3475E+02
7.7615E+02
−1.0806E+03
8.2515E+02
−2.6285E+02

R6
−5.5912E+01
8.8578E+01
−8.3849E+01
4.3222E+01
−9.1615E+00

R7
1.1494E+00
−1.1895E+00
6.9097E−01
−2.0218E−01
2.2889E−02

R8
−3.1715E−01
1.0768E−01
−2.1212E−02
2.3834E−03
−1.3570E−04

R9
7.6114E−02
−1.7655E−02
2.4716E−03
−1.9269E−04
6.4107E−06

R10
−5.7598E−03
1.0183E−03
−1.1491E−04
7.2079E−06
−1.8668E−07

In Table 2, k is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are aspheric surface coefficients.

It shall be noted that the non-spheres in each lens in this embodiment are ones represented by the following formula (21), but a specific form of the following formula (21) is only one example. Practically, the present disclosure is not limited to this formula.

y=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶+A18x¹⁸+A20x²⁰ (21)

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, and P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5. 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

P1R2
1
0.265

P2R1
2
0.225
0.455

P2R2

P3R1
1
0.755

P3R2
1
0.895

P4R1
1
1.195

P4R2
2
0.985
1.405

P5R1
2
1.005
2.105

P5R2
2
0.425
2.065

TABLE 4

Number(s) of arrest points
Arrest point position 1

P1R1

P1R2
1
0.725

P2R1

P2R2

P3R1

P3R2

P4R1

P4R2

P5R1
1
1.845

P5R2
1
0.945

In addition, Table 17 in the following shows various values of Embodiments 1 and values corresponding to parameters which are specified in the above conditions.

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color with wavelengths of 436 nm, 486 nm, 546 nm, 588 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.

In this embodiment, an entrance pupil diameter of the camera optical lens 10 is 1.720 mm, an image height of 1.0H is 2.914 mm, a FOV (field of view) in a diagonal direction is 78.60°. 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 2

FIG. 5 is a schematic diagram of a structure of a camera optical lens 20 according to Embodiment 2 of the present disclosure. 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=
−0.232

R1
1.428
d1=
0.490
nd1
1.5444
ν1
55.82

R2
6.935
d2=
0.048

R3
3.281
d3=
0.222
nd2
1.6610
ν2
20.53

R4
1.864
d4=
0.385

R5
−40.571
d5=
0.378
nd3
1.5444
ν3
55.82

R6
−15.025
d6=
0.421

R7
−8.629
d7=
0.522
nd4
1.5444
ν4
55.82

R8
−1.091
d8=
0.359

R9
−5.038
d9=
0.306
nd5
1.5346
ν5
55.69

R10
1.293
d10=
0.372

R11
∞
d11=
0.300
ndg
1.5168
νg
64.21

R12
∞
d12=
0.455

TABLE 6

Conic

coefficient
Aspheric surface coefficients

k
A4
A6
A8
A10

R1
2.9642E−01
1.0617E−02
−4.0512E−01
3.4048E+00
−1.5523E+01

R2
2.9969E+01
−2.4445E−01
1.5500E−01
4.5068E+00
−2.8861E+01

R3
−6.7063E+01
−1.3347E−01
7.1282E−01
−3.5936E+00
2.0489E+01

R4
−3.7918E+00
−1.3357E−01
1.3081E+00
−7.9783E+00
3.9883E+01

R5
9.8699E+01
−2.7126E−01
1.0110E+00
−9.2384E+00
4.4844E+01

R6
1.6520E+02
−1.3845E−01
−2.1374E−01
−3.6812E−02
3.0392E+00

R7
6.8284E+00
−5.9005E−02
2.0656E−01
−6.9476E−01
1.3056E+00

R8
−5.8131E+00
−2.6442E−01
4.6759E−01
−5.9521E−01
6.1181E−01

R9
−9.6528E−01
−3.1722E−01
3.4758E−01
−2.6439E−01
1.5503E−01

R10
−9.0568E+00
−1.9701E−01
1.6932E−01
−1.0868E−01
4.6602E−02

Aspheric surface coefficients

A12
A14
A16
A18
A20

R1
4.1622E+01
−6.8785E+01
6.9310E+01
−3.9302E+01
9.5463E+00

R2
9.3653E+01
−1.8590E+02
2.2637E+02
−1.5596E+02
4.6551E+01

R3
−7.4629E+01
1.5923E+02
−1.9626E+02
1.2871E+02
−3.4492E+01

R4
−1.3032E+02
2.6895E+02
−3.3750E+02
2.3514E+02
−6.9915E+01

R5
−1.3371E+02
2.4887E+02
−2.8375E+02
1.8172E+02
−4.9620E+01

R6
−1.2971E+01
2.6060E+01
−2.8303E+01
1.5945E+01
−3.6170E+00

R7
−1.5286E+00
1.0879E+00
−4.5304E−01
1.0092E−01
−9.2738E−03

R8
−4.1482E−01
1.7447E−01
−4.4526E−02
6.4142E−03
−4.0671E−04

R9
−6.1736E−02
1.5729E−02
−2.4566E−03
2.1474E−04
−8.0582E−06

R10
−1.2863E−02
2.1123E−03
−1.7016E−04
2.0211E−06
3.6664E−07

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

inflexion
point
point
point
point

points
position 1
position 2
position 3
position 4

P1R1
1
0.815

P1R2
3
0.325
0.365
0.535

P2R1
1
0.695

P2R2

P3R1
1
0.805

P3R2
1
0.965

P4R1

P4R2
2
0.815
1.355

P5R1
1
1.095

P5R2
4
0.435
2.015
2.145
2.265

TABLE 8

Number of arrest points
Arrest point position 1

P1R1

P1R2
1
0.695

P2R1

P2R2

P3R1

P3R2

P4R1

P4R2

P5R1
1
1.855

P5R2
1
1.035

In addition, Table 17 in the following shows various values of Embodiments 2 and values corresponding to parameters which are specified in the above conditions.

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. A field curvature S in FIG. 8 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

M this embodiment, an entrance pupil diameter of the camera optical lens 20 is 1.702 mm, an image height of 1.0H is 2.946 mm, a FOV (field of view) in the diagonal direction is 78.80°. 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.

Embodiment 3

FIG. 9 is a schematic diagram of a structure of a camera optical lens 30 according to Embodiment 3 of the present disclosure. 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=
−0.263

R1
1.362
d1=
0.497
nd1
1.5444
ν1
55.82

R2
5.669
d2=
0.087

R3
5.659
d3=
0.230
nd2
1.6700
ν2
19.39

R4
2.857
d4=
0.356

R5
−7.984
d5=
0.426
nd3
1.5444
ν3
55.82

R6
−4.391
d6=
0.430

R7
−11.635
d7=
0.465
nd4
1.5444
ν4
55.82

R8
−1.144
d8=
0.279

R9
−2.484
d9=
0.333
nd5
1.5438
ν5
56.03

R10
1.475
d10=
0.410

R11
∞
d11=
0.210
ndg
1.5168
νg
64.21

R12
∞
d12=
0.348

TABLE 10

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10

R1
−1.4775E−01
2.1968E−02
−2.6488E−01
1.6920E+00
−5.4693E+00

R2
2.3576E+01
−1.7158E−01
4.8143E−01
−3.5851E+00
2.0201E+01

R3
2.4174E+01
−2.1860E−01
4.4976E−01
−9.4949E−01
4.8675E+00

R4
−1.7535E+00
2.8581E−02
−1.3996E+00
1.7624E+01
−1.0491E+02

R5
−7.8504E+02
−3.5509E−01
1.4309E+00
−1.4188E+01
8.8213E+01

R6
1.4395E+01
−1.8502E−01
5.8041E−01
−4.9866E+00
2.1595E+01

R7
1.1328E+01
2.1205E−02
−1.8565E−01
2.4472E−01
−6.4890E−01

R8
−7.1124E+00
−1.4647E−01
2.7020E−01
−4.9253E−01
5.3373E−01

R9
−6.1261E+00
−1.7063E−01
−8.0814E−02
2.6866E−01
−1.9688E−01

R10
−1.0026E+01
−1.8347E−01
1.3067E−01
−6.5811E−02
2.2925E−02

Aspherical surface coefficients

A12
A14
A16
A18
A20

R1
9.9325E+00
−9.9597E+00
4.2895E+00
6.7222E−01
−9.9763E−01

R2
−6.6606E+01
1.2988E+02
−1.5002E+02
9.5939E+01
−2.6649E+01

R3
−1.9019E+01
4.1183E+01
−4.8862E+01
3.0040E+01
−7.8708E+00

R4
3.7418E+02
−8.2204E+02
1.0887E+03
−7.9453E+02
2.4458E+02

R5
−3.3494E+02
7.7756E+02
−1.0796E+03
8.2345E+02
−2.6431E+02

R6
−5.5938E+01
8.8591E+01
−8.3809E+01
4.3269E+01
−9.2638E+00

R7
1.1520E+00
−1.1896E+00
6.8874E−01
−2.0317E−01
2.3525E−02

R8
−3.1700E−01
1.0771E−01
−2.1235E−02
2.3722E−03
−1.3067E−04

R9
7.6117E−02
−1.7655E−02
2.4718E−03
−1.9270E−04
6.4048E−06

R10
−5.7594E−03
1.0167E−03
−1.1524E−04
7.1889E−06
−1.7558E−07

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
point
point

points
position 1
position 2

P1R1
1
0.855

P1R2
1
0.475

P2R1
1
0.755

P2R2

P3R1
1
0.755

P3R2
1
0.915

P4R1
1
1.195

P4R2
2
0.985
1.505

P5R1
1
0.995

P5R2
2
0.435
2.295

TABLE 12

Number of arrest points
Arrest point position 1

P1R1

P1R2
1
0.755

P2R1

P2R2

P3R1

P3R2

P4R1

P4R2

P5R1
1
1.935

P5R2
1
0.985

In addition, Table 17 in the following shows various values of Embodiments 3 and values corresponding to parameters which are specified in the above conditions.

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 436 nm, 486 nm, 546 nm, 588 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. A field curvature S in FIG. 12 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

In this embodiment, an entrance pupil diameter of the camera optical lens 30 is 1.720 mm, an image height of 1.0H is 2.914 mm, a FOV (field of view) in the diagonal direction is 79.60°. 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 4

FIG. 13 is a schematic diagram of a structure of a camera optical lens 30 according to Embodiment 4 of the present disclosure. Embodiment 4 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 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=
−0.232

R1
1.448
d1=
0.490
nd1
1.5444
ν1
55.82

R2
7.073
d2=
0.086

R3
2.736
d3=
0.230
nd2
1.6610
ν2
20.53

R4
1.633
d4=
0.427

R5
−524.540
d5=
0.412
nd3
1.5444
ν3
55.82

R6
−25.105
d6=
0.378

R7
−8.369
d7=
0.490
nd4
1.5444
ν4
55.82

R8
−0.993
d8=
0.314

R9
−5.502
d9=
0.298
nd5
1.5346
ν5
55.69

R10
1.185
d10=
0.422

R11
∞
d11=
0.300
ndg
1.5168
νg
64.21

R12
∞
d12=
0.405

TABLE 14

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10

R1
3.0045E−01
−1.2057E−02
−3.5175E−01
3.3739E+00
−1.5502E+01

R2
3.6860E+01
−1.3629E−01
−2.3811E−01
5.0376E+00
−2.8675E+01

R3
−8.4860E+00
−1.9675E−01
5.9274E−01
−3.2846E+00
2.0672E+01

R4
−3.3067E+00
−1.2172E−01
1.2473E+00
−7.9245E+00
4.0171E+01

R5
9.9863E+02
−2.0581E−01
8.3758E−01
−8.7860E+00
4.4750E+01

R6
8.8749E+01
−1.3546E−01
−1.5607E−01
−1.3849E−01
3.0560E+00

R7
−1.1709E+02
−5.7565E−02
2.0079E−01
−6.9417E−01
1.3059E+00

R8
−5.3455E+00
−2.5664E−01
4.6982E−01
−5.9532E−01
6.1182E−01

R9
−2.0482E+01
−3.2029E−01
3.4561E−01
−2.6435E−01
1.5508E−01

R10
−9.2526E+00
−1.9413E−01
1.6880E−01
−1.0871E−01
4.6600E−02

Aspherical surface coefficients

A12
A14
A16
A18
A20

R1
4.1538E+01
−6.8874E+01
6.9518E+01
−3.8870E+01
9.0811E+00

R2
9.3039E+01
−1.8659E+02
2.2722E+02
−1.5365E+02
4.3989E+01

R3
−7.5247E+01
1.5818E+02
−1.9516E+02
1.3284E+02
−3.9252E+01

R4
−1.3077E+02
2.6786E+02
−3.3649E+02
2.3906E+02
−7.4435E+01

R5
−1.3425E+02
2.4886E+02
−2.8306E+02
1.8224E+02
−5.0709E+01

R6
−1.2891E+01
2.6085E+01
−2.8356E+01
1.5867E+01
−3.5640E+00

R7
−1.5280E+00
1.0885E+00
−4.5272E−01
1.0100E−01
−9.3521E−03

R8
−4.1479E−01
1.7448E−01
−4.4525E−02
6.4135E−03
−4.0541E−04

R9
−6.1729E−02
1.5728E−02
−2.4568E−03
2.1471E−04
−8.0493E−06

R10
−1.2865E−02
2.1122E−03
−1.7009E−04
2.0391E−06
3.6280E−07

Table 15 and table 16 show design data of inflexion points and arrest points of each lens of the camera optical lens 40 lens according to Embodiment 4 of the present disclosure.

TABLE 15

Number(s) of
Inflexion
Inflexion

inflexion
point
point

points
position 1
position 2

P1R1

P1R2
1
0.645

P2R1
1
0.695

P2R2

P3R1
1
0.805

P3R2
1
0.985

P4R1
2
1.195
1.515

P4R2
2
0.785
1.685

P5R1
1
1.095

P5R2
2
0.425
2.315

TABLE 16

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1

P1R2
1
0.785

P2R1

P2R2

P3R1

P3R2

P4R1

P4R2
2
1.535
1.735

P5R1
1
1.885

P5R2
1
1.055

In addition, Table 17 in the following shows various values of Embodiments 4 and values corresponding to parameters which are specified in the above conditions.

FIG. 14 and FIG. 15 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 40 according to Embodiment 4. FIG. 16 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 40 according to Embodiment 4. A field curvature S in FIG. 16 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

In an embodiment, an entrance pupil diameter of the camera optical lens 40 is 1.685 mm, an image height of 1.0H is 2.946 mm, a FOV (field of view) in the diagonal direction is 79.40°. 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 17 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.

TABLE 21

Parameters and
Embodiment
Embodiment
Embodiment
Embodiment

conditions
1
2
3
4

f1/f2
−0.37
−0.46
−0.36
−0.49

f3/f
5.84
12.45
5.04
13.96

(f2 + f5)/f
−3.00
−2.52
−3.07
−2.43

(R3 + R4)/
3.02
3.63
3.04
3.96

(R3 − R4)

(R7 + R8)/
1.23
1.29
1.22
1.27

(R7 − R8)

(R9 + R10)/
0.30
0.59
0.25
0.65

(R9 − R10)

f
3.448
3.488
3.398
3.454

f1
3.169
3.188
3.152
3.231

f2
−8.634
−6.892
−8.802
−6.607

f3
20.152
43.418
17.128
48.212

f4
2.395
2.229
2.284
2.013

f5
−1.718
−1.885
−1.645
−1.788

f12
4.374
4.919
4.315
5.058

FNO
2.01
2.05
1.98
2.05

The above are only embodiments of the present disclosure. It shall be indicated that those of ordinary skill in the art can make improvements without departing from the creative concept of the present disclosure, and these belong to the protection scope of the present disclosure.

CAMERA OPTICAL LENS

Information

Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (1)