WO2021119883A1 - Camera optical lens - Google Patents

Abstract

A camera optical lens (10), which successively comprises from the object side to the image side: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5), wherein the overall focal length of the camera optical lens (10) is f, the focal length of the third lens (L3) is f3, the focal length of the fifth lens (L5) is f5, the distance from the image side surface of the fifth lens (L5) to the image plane on an axis is BF, the total optical length of the camera optical lens (10) is TTL, and the following relationships are satisfied: 0.15≤f3/f≤0.60; 0.45≤BF/TTL≤0.70; and -5.00≤f5/f≤-0.30. The camera optical lens (10) meets the design requirements of a large aperture, a long focal length, and ultra-thinness while having a good optical performance.

Description

Camera optical lens 【Technical Field】

The present invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as imaging devices such as monitors and PC lenses.

【Background technique】

With the development of camera technology, camera optical lenses are widely used in various electronic products, such as smart phones and digital cameras. In order to facilitate portability, people are increasingly pursuing thinner and lighter electronic products. Therefore, miniaturized camera optical lenses with good image quality have become the mainstream of the current market.

Camera optical lenses on traditional electronic products mostly adopt four-element and five-element lens structures. However, as the diversified needs of users increase, due to the inadequate power distribution and lens shape settings of the existing lens structure, the camera The ultra-thinness of optical lenses is still insufficient.

Therefore, it is necessary to provide an imaging optical lens that has good optical performance and meets the requirements of long focal length and ultra-thin design.

[Summary of the invention]

The purpose of the present invention is to provide an imaging optical lens, which aims to solve the problem of insufficient ultra-thinning of the traditional imaging optical lens.

The technical solution of the present invention is as follows: an imaging optical lens, from the object side to the image side, including: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens;

Wherein, the overall focal length of the imaging optical lens is f, the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the on-axis distance from the image side surface of the fifth lens to the image surface is BF , The total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.15≤f3/f≤0.60; 0.45≤BF/TTL≤0.70; -5.00≤f5/f≤-0.30.

Preferably, the on-axis thickness of the second lens is d3, and the on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d4, and the following relationship is satisfied: 0.50≤d3/d4 ≤2.00.

Preferably, the radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8, and the following relationship is satisfied: -10.00≤(R7+R8)/(R7-R8 )≤-1.00.

Preferably, the focal length of the first lens is f1, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the on-axis thickness of the first lens is Is d1, and satisfies the following relationship: 0.20≤f1/f≤0.99; -5.55≤(R1+R2)/(R1-R2) ≤-0.75; 0.04≤d1/TTL≤0.24.

Preferably, the focal length of the second lens is f2, the radius of curvature of the object side of the second lens is R3, the radius of curvature of the image side of the two lenses is R4, and the on-axis thickness of the second lens is d3, and satisfies the following relationship: -1.30≤f2/f≤-0.19; -0.26≤(R3+R4)/(R3-R4)≤1.16; 0.01≤d3/TTL≤0.09.

Preferably, the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, the axial thickness of the third lens is d5, and the following relationship is satisfied:- 2.46≤(R5+R6)/(R5-R6)≤2.13; 0.01≤d5/TTL≤0.07.

Preferably, the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, and the following relationship is satisfied: -8.38≤f4/f≤-0.14; 0.03≤d7/TTL≤0.20.

Preferably, the radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the following relationship is satisfied: 0.20 ≤(R9+R10)/(R9-R10)≤17.53; 0.02≤d9/TTL≤0.27.

Preferably, the image height of the imaging optical lens is IH, and satisfies the following relationship: f/IH≥5.

Preferably, the following relationship is satisfied: TTL/f≤1.02.

The beneficial effects of the present invention are:

The imaging optical lens provided by the present invention has good optical performance and meets the design requirements of long focal length and ultra-thinness.

【Explanation of the drawings】

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

FIG. 1 is a schematic diagram of the structure of the imaging optical lens of the first embodiment;

FIG. 2 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 1;

3 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 1;

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

5 is a schematic diagram of the structure of the imaging optical lens of the second embodiment;

6 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 5;

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

9 is a schematic diagram of the structure of an imaging optical lens of the third embodiment;

10 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 9;

11 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 9;

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

FIG. 13 is a schematic diagram of the structure of an imaging optical lens of a fourth embodiment;

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

15 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 13;

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

【Detailed ways】

The present invention will be further described below in conjunction with the drawings and embodiments.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, a person of ordinary skill in the art can understand that, in each embodiment of the present invention, many technical details are proposed for the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed by the present invention can be realized.

(First embodiment)

Please refer to FIGS. 1 to 4 together. The present invention provides an imaging optical lens 10 according to a first embodiment. In FIG. 1, the left side is the object side, and the right side is the image side. The imaging optical lens 10 mainly includes five lenses. From the object side to the image side, they are the aperture S1, the first lens L1, the second lens L2, and the third lens. Lens L3, fourth lens L4, and fifth lens L5. An optical element such as an optical filter GF may be provided between the fifth lens L5 and the image plane Si.

In this embodiment, the first lens L1 has positive refractive power; the second lens L2 has negative refractive power; the third lens L3 has positive refractive power; the fourth lens L4 has negative refractive power; the fifth lens L5 has negative refractive power .

Here, define the focal length of the entire imaging optical lens as f, the focal length of the third lens as f3, the focal length of the fifth lens as f5, and the on-axis distance from the image side surface of the fifth lens to the image surface It is BF, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship:

0.15≤f3/f≤0.60 (1)

0.45≤BF/TTL≤0.70 (2)

-5.00≤f5/f≤-0.30 (3)

Among them, the conditional formula (1) specifies the ratio of the focal length of the third lens to the total focal length, which helps to improve the performance of the optical system within the conditional range.

Conditional formula (2) When the BF/TTL meets the conditions, the back focus of the system can be effectively allocated, leaving enough space for the installation of the detector.

Conditional formula (3) specifies the ratio of the focal length of the fifth lens to the total focal length, which can effectively correct aberrations within the range of conditions, thereby improving imaging quality.

Define the on-axis thickness of the second lens L2 as d3, and the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3 as d4, which satisfies the following relationship: 0.50≤d3/d4≤2.00, when d3/ When d4 meets the conditions, it is helpful for lens processing and lens assembly.

Define the radius of curvature of the object side surface of the fourth lens L4 as R7, and the radius of curvature of the image side surface of the fourth lens L4 as R8, and satisfy the following relationship: -10.00≤(R7+R8)/(R7-R8)≤-1.00 , The focal length of the fourth lens is specified. Within the range specified by the conditional formula, the degree of deflection of light passing through the lens can be eased and aberrations can be effectively reduced.

The focal length of the first lens L1 is defined as f1, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: 0.20≤f1/f≤0.99, which specifies the ratio of the positive refractive power of the first lens L1 to the overall focal length. When within the specified range, the first lens has an appropriate positive refractive power, which is beneficial to reduce system aberrations, and at the same time, is beneficial to the development of ultra-thin lenses. Preferably, 0.32≤f1/f≤0.79.

The curvature radius of the object side surface of the first lens L1 is R1, and the curvature radius of the image side surface of the first lens L1 is R2, which satisfies the following relationship: -5.55≤(R1+R2)/(R1-R2)≤-0.75, reasonable The shape of the first lens L1 is controlled so that the first lens L1 can effectively correct the spherical aberration of the system. Preferably, it satisfies -3.47≤(R1+R2)/(R1-R2)≤-0.94.

The axial thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.04≦d1/TTL≦0.24. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.07≤d1/TTL≤0.19 is satisfied.

Define the focal length of the second lens L2 as f2, and the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: -1.30≤f2/f≤-0.19. By controlling the positive power of the second lens L2 in a reasonable range, Conducive to correcting the aberration of the optical system. Preferably, -0.81≤f2/f≤-0.24 is satisfied.

The curvature radius of the object side of the second lens L2 is R3, and the curvature radius of the image side of the second lens L2 is R4, which satisfies the following relationship: -0.26≤(R3+R4)/(R3-R4)≤1.16, which specifies the second When the shape of the lens L2 is within the range, as the lens becomes ultra-thin, it is beneficial to correct the problem of axial chromatic aberration. Preferably, -0.16≤(R3+R4)/(R3-R4)≤0.93 is satisfied.

The axial thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens is TTL, which satisfies the following relational expression: 0.01≤d3/TTL≤0.09. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.02≤d3/TTL≤0.07 is satisfied.

Define the curvature radius of the object side surface of the third lens L3 as R5, and the curvature radius of the image side surface of the third lens L3 as R6, which satisfies the following relationship: -2.46≤(R5+R6)/(R5-R6)≤2.13, which is specified The shape of the third lens is within the range specified by the conditional formula, which can alleviate the degree of deflection of light passing through the lens and effectively reduce aberrations. Preferably, -1.54≤(R5+R6)/(R5-R6)≤1.70 is satisfied.

The axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens is TTL, which satisfies the following relational expression: 0.01≤d5/TTL≤0.07. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.02≤d5/TTL≤0.06 is satisfied.

Define the focal length of the fourth lens L4 as f4, and the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: -8.38≤f4/f≤-0.14. The reasonable distribution of optical power enables the system to have better imaging Quality and low sensitivity. Preferably, it satisfies -5.24≤f4/f≤-0.18.

The axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.03≦d7/TTL≦0.20. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.05≤d7/TTL≤0.16 is satisfied.

Define the radius of curvature of the object side surface of the fifth lens L5 as R9, and the radius of curvature of the image side surface of the fifth lens L5 as R10, which satisfies the following relationship: 0.20≤(R9+R10)/(R9-R10)≤17.53, which specifies The shape of the fifth lens L5 is favorable for lens processing within the range of conditions. Preferably, 0.32≤(R9+R10)/(R9-R10)≤14.02 is satisfied.

The axial thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: 0.02≤d9/TTL≤0.27. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.03≤d9/TTL≤0.22 is satisfied.

In this embodiment mode, the overall focal length of the imaging optical lens 10 is f, and the image height of the imaging optical lens 10 is IH, and the following relationship is satisfied: f/IH≥5, so as to achieve a long focal length.

In this embodiment mode, the overall focal length of the imaging optical lens 10 is f, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: TTL/f≤1.02, thereby achieving ultra-thinness.

It is worth mentioning that since the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 have the structure and parameter relationship as described above, the imaging optical lens 10 can be reasonable The power, spacing, and shape of each lens are allocated, and various aberrations are corrected accordingly.

The imaging optical lens 10 of the present invention will be described below with an example. The symbols described in each example are as follows. The unit of focal length, distance on axis, radius of curvature, thickness on axis, position of inflection point, and position of stagnation point is mm.

TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), the unit is mm;

Preferably, the object side and/or the image side of the lens can also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements. For specific implementations, refer to the following. The design data of the imaging optical lens 10 according to the first embodiment of the present invention is shown below.

【Table 1】

The meaning of each symbol in the above table is as follows.

S1: aperture;

R: The radius of curvature of the optical surface, and the radius of curvature of the center of the lens;

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

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

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

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

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

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

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

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

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

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

R11: the radius of curvature of the object side of the optical filter GF;

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

d: the on-axis thickness of the lens and the on-axis distance between the lenses;

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

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

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

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

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

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

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

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

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

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

d10: the on-axis distance from the image side of the fifth lens L5 to the object side of the optical filter GF; d11: the on-axis thickness of the optical filter GF;

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

nd: refractive index of d-line;

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

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

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

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

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

ndg: the 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 optical filter GF.

Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

【Table 2】

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

IH: Image height

y=(x ² /R)/[1+{1-(k+1)(x ² /R ² )} ^1/2 ]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰ +A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰ (1)

For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1). However, the present invention is not limited to the aspheric polynomial form represented by the formula (1).

Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 of this embodiment. Among them, P1R1 and P1R2 represent the object side and image side of the first lens L1 respectively, P2R1 and P2R2 represent the object side and image side of the second lens L2 respectively, and P3R1 and P3R2 represent the object side and image side of the third lens L3 respectively. P4R1 and P4R2 represent the object side and image side of the fourth lens L4, respectively, and P5R1 and P5R2 represent the object side and the image side of the fifth lens L5, respectively. The corresponding data in the “reflection point position” column is the vertical distance from the reflex point set on the surface of each lens to the optical axis of the imaging optical lens 10. The data corresponding to the “stationary point position” column is the vertical distance from the stationary point set on the surface of each lens to the optical axis of the imaging optical lens 10.

【table 3】

【Table 4】

To	Number of stationary points	Stagnation position 1	Stagnation position 2	Stagnation position 3	Stagnation position 4
P1R1	0	To	To	To	To
P1R2	1	0.325	To	To	To
P2R1	2	1.265	1.645	To	To
P2R2	0	To	To	To	To
P3R1	4	0.515	0.785	0.885	1.005
P3R2	1	1.405	To	To	To
P4R1	1	1.375	To	To	To
P4R2	0	To	To	To	To
P5R1	0	To	To	To	To
P5R2	0	To	To	To	To

In addition, the following Table 17 also lists the values corresponding to the various parameters in the first embodiment and the parameters specified in the conditional expressions.

2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the imaging optical lens 10. FIG. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 10. The curvature of field S in FIG. 4 is the curvature of field in the sagittal direction, and T is the curvature of field in the meridional direction.

In this embodiment, the imaging optical lens 10 has an entrance pupil diameter of 3.682mm, a full-field image height of 2.502mm, a diagonal viewing angle of 21.72°, a large aperture, ultra-thin, and excellent Optical characteristics.

(Second embodiment)

5 is a schematic diagram of the structure of the imaging optical lens 20 in the second embodiment. The second embodiment is basically the same as the first embodiment. The meanings of the symbols in the following list are also the same as those in the first embodiment, so the same parts will not be omitted here To repeat, only the differences are listed below.

Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

【table 5】

Table 6 shows the aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

【Table 6】

Table 7 and Table 8 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 20.

【Table 7】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3	Recurve point position 4
P1R1	0	To	To	To	To
P1R2	2	0.175	0.855	To	To
P2R1	1	0.725	To	To	To
P2R2	0	To	To	To	To
P3R1	3	0.495	0.715	1.355	To

P3R2	2	0.385	1.395	To	To
P4R1	3	0.205	0.295	1.385	To
P4R2	1	1.435	To	To	To
P5R1	4	0.145	0.395	0.585	1.405
P5R2	0	To	To	To	To

【Table 8】

To	Number of stationary points	Stagnation position 1	Stagnation position 2	Stagnation position 3
P1R1	0	To	To	To
P1R2	2	0.305	1.215	To
P2R1	1	1.135	To	To
P2R2	0	To	To	To
P3R1	0	To	To	To
P3R2	2	0.695	1.445	To
P4R1	1	1.435	To	To
P4R2	0	To	To	To
P5R1	3	0.285	0.505	0.645
P5R2	0	To	To	To

In addition, in the following Table 17, the values corresponding to the various parameters in the second embodiment and the parameters specified in the conditional expressions are also listed.

6 and 7 respectively show schematic diagrams of the axial aberration and the chromatic aberration of magnification after the light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm passes through the imaging optical lens 20. FIG. 8 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 20. The curvature of field S in FIG. 8 is the curvature of field in the sagittal direction, and T is the curvature of field in the meridional direction.

In this embodiment, the imaging optical lens 20 has an entrance pupil diameter of 3.693mm, a full-field image height of 2.502mm, a diagonal viewing angle of 21.71°, a large aperture, ultra-thin, and excellent Optical characteristics.

(Third embodiment)

9 is a schematic diagram of the structure of the imaging optical lens 30 in the third embodiment. The third embodiment is basically the same as the first embodiment. The meanings of the symbols in the following list are also the same as those in the first embodiment, so the same parts will not be omitted here. To repeat, only the differences are listed below.

Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

【Table 9】

Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

【Table 10】

Table 11 and Table 12 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 30.

【Table 11】

【Table 12】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	1	0.415	To
P2R1	1	0.875	To
P2R2	0	To	To
P3R1	2	0.105	0.445
P3R2	0	To	To
P4R1	0	To	To
P4R2	0	To	To
P5R1	1	0.135	To
P5R2	0	To	To

In addition, in the following Table 17, the values corresponding to the various parameters in the third embodiment and the parameters specified in the conditional expressions are also listed.

10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm pass through the imaging optical lens 30. FIG. 12 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 30. The curvature of field S in FIG. 12 is the curvature of field in the sagittal direction, and T is the curvature of field in the meridional direction.

In this embodiment, the imaging optical lens 30 has an entrance pupil diameter of 3.606mm, a full-field image height of 2.502mm, a diagonal viewing angle of 22.03°, a large aperture, ultra-thin, and excellent Optical characteristics.

(Fourth embodiment)

13 is a schematic diagram of the structure of the imaging optical lens 40 in the fourth embodiment. The fourth embodiment is basically the same as the first embodiment. The meanings of the symbols in the following list are also the same as those in the first embodiment, so the same parts will not be omitted here. To repeat, only the differences are listed below.

Table 13 and Table 14 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

【Table 13】

Table 14 shows the aspheric surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

【Table 14】

Table 15 and Table 16 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 40.

【Table 15】

【Table 16】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	1	0.235	To
P2R1	1	1.585	To
P2R2	0	To	To
P3R1	2	0.235	0.475
P3R2	2	0.295	0.485
P4R1	0	To	To
P4R2	0	To	To
P5R1	1	0.225	To
P5R2	0	To	To

In addition, in the following Table 17, the values corresponding to the various parameters and the parameters specified in the conditional expressions in the fourth embodiment are also listed.

14 and 15 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm pass through the imaging optical lens 40. FIG. 16 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 40. The curvature of field S in FIG. 16 is the curvature of field in the sagittal direction, and T is the curvature of field in the meridional direction.

In this embodiment, the imaging optical lens 10 has an entrance pupil diameter of 3.907 mm, a full field of view image height of 2.502 mm, and a diagonal field of view angle of 20.53°. It is ultra-thin and has excellent optical characteristics. .

The following Table 17 lists the values of the corresponding conditional expressions in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment according to the above conditional expressions, and the values of other related parameters.

【Table 17】

Parameters and conditions	Example 1	Example 2	Example 3	Example 4
f3/f	0.16	0.60	0.25	0.24
BF/TTL	0.62	0.46	0.69	0.47
f5/f	-0.34	-4.90	-0.46	-4.99
f	12.886	12.925	12.620	13.652
f1	8.471	5.198	5.362	5.558
f2	-8.395	-3.733	-7.369	-8.119
f3	2.012	7.690	3.107	3.214
f4	-5.815	-54.182	-9.458	-2.942
f5	-4.382	-63.331	-5.788	-68.095
f12	33.238	121.368	13.165	11.125
Fno	3.500	3.500	3.500	3.494

Among them, Fno is the aperture F number of the imaging optical lens.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims (10)

1. An imaging optical lens, characterized in that it includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the object side to the image side;

   Wherein, the overall focal length of the imaging optical lens is f, the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the on-axis distance from the image side surface of the fifth lens to the image surface is BF , The total optical length of the camera optical lens is TTL, and satisfies the following relationship:

   0.15≤f3/f≤0.60;

   0.45≤BF/TTL≤0.70;

   -5.00≤f5/f≤-0.30.
2. The imaging optical lens of claim 1, wherein the on-axis thickness of the second lens is d3, and the on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d4 , And satisfy the following relationship:

   0.50≤d3/d4≤2.00.
3. The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8, and the following relationship is satisfied:

   -10.00≤(R7+R8)/(R7-R8)≤-1.00.
4. The imaging optical lens of claim 1, wherein the focal length of the first lens is f1, the radius of curvature of the object side of the first lens is R1, and the radius of curvature of the image side of the first lens Is R2, the on-axis thickness of the first lens is d1, and satisfies the following relationship:

   0.20≤f1/f≤0.99;

   -5.55≤(R1+R2)/(R1-R2)≤-0.75;

   0.04≤d1/TTL≤0.24.
5. The imaging optical lens of claim 1, wherein the focal length of the second lens is f2, the radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side of the two lenses is R4, the on-axis thickness of the second lens is d3, and satisfies the following relationship:

   -1.30≤f2/f≤-0.19;

   -0.26≤(R3+R4)/(R3-R4)≤1.16;

   0.01≤d3/TTL≤0.09.
6. The imaging optical lens of claim 1, wherein the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, and the axis of the third lens The upper thickness is d5 and satisfies the following relationship:

   -2.46≤(R5+R6)/(R5-R6)≤2.13;

   0.01≤d5/TTL≤0.07.
7. The imaging optical lens of claim 1, wherein the focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, and the following relationship is satisfied:

   -8.38≤f4/f≤-0.14;

   0.03≤d7/TTL≤0.20.
8. The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, and the axis of the fifth lens The upper thickness is d9 and satisfies the following relationship:

   0.20≤(R9+R10)/(R9-R10)≤17.53;

   0.02≤d9/TTL≤0.27.
9. The imaging optical lens of claim 1, wherein the image height of the imaging optical lens is IH and satisfies the following relationship:

   f/IH≥5.
10. The imaging optical lens of claim 1, wherein the following relational expression is satisfied:

    TTL/f≤1.02.

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