WO2021119889A1 - Camera optical lens - Google Patents

Abstract

A camera optical lens (10), sequentially comprising from an object side to an image side: a first lens (L1) having negative refractive power, a second lens (L2) having positive refractive power, a third lens (L3) having negative refractive power, a fourth lens (L4) having positive refractive power, and a fifth lens (L5) having negative refractive power, which meet the following relations: -5.00≤f3/f≤-3.00; 7.00≤d7/d8≤12.00; 3.40≤(R5+R6)/(R5-R6)≤10.00; 20.00≤R1/d1≤40.00. The camera optical lens (10) satisfies the design requirements of a large aperture, a wide angle, and ultra-thin while having good optical properties.

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, five-element, six-element or even seven-element lens structure. However, as the diversified needs of users increase, due to the optical power distribution and lens structure of the existing lens structure The shape setting is not sufficient, resulting in the wide-angle and ultra-thinning of the imaging optical lens is still insufficient.

Therefore, it is necessary to provide an imaging optical lens that has good optical performance and meets the requirements of wide-angle 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 problems of insufficient wide-angle and 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 with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, The fourth lens with positive refractive power and the fifth lens with negative refractive power;

Wherein, the overall focal length of the imaging optical lens is f, the focal length of the third lens is f3, the axial thickness of the first lens is d1, the radius of curvature of the object side surface of the first lens is R1, so 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 fourth lens is d7, and the image side surface of the fourth lens reaches the The on-axis distance on the object side of the fifth lens is d8, and satisfies the following relational expressions: -5.00≤f3/f≤-3.00; 7.00≤d7/d8≤12.00; 3.40≤(R5+R6)/(R5-R6) ≤10.00; 20.00≤R1/d1≤40.00.

Preferably, the radius of curvature of the object side surface of the fifth lens is R9, and the radius of curvature of the image side surface of the fifth lens is R10, and the following relationship is satisfied: 2.00≤(R9+R10)/(R9-R10) ≤5.00.

Preferably, the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface of the second lens is R4, and the following relationship is satisfied: -5.00≤R3/R4≤-2.50.

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 total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -4.97≤f1/f≤-1.45; 0.84≤(R1+R2)/(R1-R2)≤3.78; 0.02≤d1/TTL≤0.06.

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 second lens is R4, and the on-axis thickness of the second lens is Is d3, the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.52≤f2/f≤1.69; 0.22≤(R3+R4)/(R3-R4)≤1.00; 0.07≤d3/TTL≤ 0.24.

Preferably, the axial thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.02≤d5/TTL≤0.09.

Preferably, the focal length of the fourth lens is f4, the radius of curvature of the object side of the fourth lens is R7, the radius of curvature of the image side of the fourth lens is R8, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 0.30≤f4/f≤1.26; 0.48≤(R7+R8)/(R7-R8)≤2.15; 0.11≤d7/TTL≤0.37.

Preferably, the focal length of the fifth lens is f5, the axial thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -3.12≤f5/f≤- 0.46; 0.03≤d9/TTL≤0.13.

Preferably, the image height of the imaging optical lens is IH, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: TTL/IH≤1.78.

Preferably, the field of view of the imaging optical lens is FOV, and satisfies the following relationship: FOV≥103°.

The beneficial effects of the present invention are:

The camera optical lens provided by the present invention has good optical performance and meets the design requirements of large aperture, wide-angle 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;

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

FIG. 17 is a schematic diagram of the structure of an imaging optical lens of a fifth embodiment;

18 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 17;

19 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 17;

20 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 17.

【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, there are a first lens L1, an aperture S1, a second lens L2, and a third lens. Lens L3, fourth lens L4, and fifth lens L5. A glass plate GF is provided between the fifth lens L5 and the image plane Si. The glass plate GF may be a glass cover plate or an optical filter.

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

Here, the focal length of the entire imaging optical lens is defined as f, the focal length of the third lens is f3, the axial thickness of the first lens is d1, the curvature radius of the object side of the first lens is R1, and the object side of the third lens is The radius of curvature is R5, the radius of curvature of the image side of the third lens is R6, the on-axis thickness of the fourth lens is d7, and the on-axis distance from the image side of the fourth lens to the object side of the fifth lens is d8, which satisfies the following relationship formula:

-5.00≤f3/f≤-3.00 (1)

7.00≤d7/d8≤12.00 (2)

3.40≤(R5+R6)/(R5-R6)≤10.00 (3)

20.00≤R1/d1≤40.00 (4)

Among them, the conditional formula (1) specifies the ratio of the focal length of the third lens to the total focal length of the system, which can effectively balance the spherical aberration and field curvature of the system.

The conditional formula (2) specifies the ratio of the thickness of the fourth lens to the air space between the fourth and fifth lenses, which helps to compress the total length of the optical system within the scope of the conditional formula and achieve an ultra-thin effect. Preferably, 7.01≤d7/d8≤11.93 is satisfied.

Conditional expression (3) specifies the shape of the third lens, and when it is within this range, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, 3.41≤(R5+R6)/(R5-R6)≤9.83 is satisfied.

The conditional expression (4) specifies the ratio of the curvature radius of the object side surface of the first lens to the thickness of the first lens, which helps to improve the performance of the optical system within the range of the conditional expression. Preferably, 20.00≤R1/d1≤39.75 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: 2.00≤(R9+R10)/(R9-R10)≤5.00, which specifies When the shape of the fifth lens is within this range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, 2.01≤(R9+R10)/(R9-R10)≤4.93 is satisfied.

Define the radius of curvature of the object side of the second lens L2 as R3, and the radius of curvature of the image side of the second lens L2 as R4, which satisfies the following relationship: -5.00≤R3/R4≤-2.50, which specifies the shape of the second lens, Within the specified range of the conditional formula, the degree of deflection of the light passing through the lens can be eased, and aberrations can be effectively reduced.

Define the focal length of the first lens L1 as f1, and the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: -4.97≤f1/f≤-1.45, which specifies the ratio of the negative refractive power of the first lens L1 to the overall focal length . When within the specified range, the first lens has an appropriate negative refractive power, which is beneficial to reduce system aberrations, and at the same time, is beneficial to the development of ultra-thin and wide-angle lenses. Preferably, it satisfies -3.11≤f1/f≤- 1.81.

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 L2 is R2, which satisfies the following relationship: 0.84≤(R1+R2)/(R1-R2)≤3.78, reasonable control of the first lens The shape of a lens enables the first lens to effectively correct the spherical aberration of the system. Preferably, it satisfies 1.34≤(R1+R2)/(R1-R2)≤3.02.

The axial thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02≦d1/TTL≦0.06. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.03≤d1/TTL≤0.05 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: 0.52≤f2/f≤1.69. By controlling the positive refractive power of the second lens L2 in a reasonable range, it is beneficial Correct the aberration of the optical system. Preferably, 0.83≤f2/f≤1.35 is satisfied.

The curvature radius of the object side surface of the second lens L2 is R3, and the curvature radius of the image side surface of the second lens L2 is R4, which satisfies the following relationship: 0.22≤(R3+R4)/(R3-R4)≤1.00, which specifies the second lens When the shape of L2 is within the range, as the lens develops towards ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, 0.34≤(R3+R4)/(R3-R4)≤0.80 is satisfied.

The axial thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.07≤d3/TTL≤0.24. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.11≤d3/TTL≤0.19 is satisfied.

The on-axis thickness of the third lens L3 is defined as d5, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational expression: 0.02≤d5/TTL≤0.09. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.03≤d5/TTL≤0.07 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: 0.30≤f4/f≤1.26. The reasonable distribution of optical power makes the system have better imaging quality and Lower sensitivity. Preferably, 0.47≤f4/f≤1.01 is satisfied.

The curvature radius of the object side surface of the fourth lens L4 is R7, and the curvature radius of the image side surface of the fourth lens L4 is R8, which satisfies the following relationship: 0.48≤(R7+R8)/(R7-R8)≤2.15, which specifies the fourth lens When the shape of L4 is within the range, with the development of ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view. Preferably, 0.77≤(R7+R8)/(R7-R8)≤1.72 is satisfied.

The axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational expression: 0.11≤d7/TTL≤0.37. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.17≤d7/TTL≤0.29 is satisfied.

Define the focal length f5 of the fifth lens L5, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -3.12≤f5/f≤-0.46. The limitation on the fifth lens L5 can effectively make the light angle of the imaging lens gentle , Reduce tolerance sensitivity. Preferably, it satisfies -1.95≤f5/f≤-0.58.

The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.03≦d9/TTL≦0.13. Within the range of the conditional expression, it is beneficial to realize ultra-thinness. Preferably, 0.04≤d9/TTL≤0.10 is satisfied.

In this embodiment, the image height of the overall imaging optical lens 10 is IH, and the following conditional formula is satisfied: TTL/IH≤1.78, thereby achieving ultra-thinness. In this embodiment, the FOV of the imaging optical lens 10 is greater than or equal to 103°, thereby achieving a wide angle.

In addition, in the imaging optical lens 10 provided by this embodiment, the surface of each lens can be set as an aspherical surface. The aspherical surface can be easily made into a shape other than a spherical surface, and more control variables can be obtained to reduce aberrations, thereby reducing the use of lenses. Therefore, the total length of the imaging optical lens 10 can be effectively reduced. In this embodiment, both the object side surface and the image side surface of each lens are aspherical.

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.

In addition, at least one of the object side surface and the image side surface of each lens may also be provided with an inflection point and/or a stagnation point to meet high-quality imaging requirements. For specific implementations, refer to the following.

The design data of the imaging optical lens 10 shown in FIG. 1 is shown below.

Table 1 lists the object side curvature radius and the image side curvature radius R of the first lens L1 to the fifth lens L5 constituting the imaging optical lens 10 in the first embodiment of the present invention, the on-axis thickness of each lens, and two adjacent lenses The distance d, the refractive index nd and the Abbe number νd. It should be noted that in this embodiment, the units of R and d are both millimeters (mm).

【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 surface of the fifth lens L5 to the object side surface of the optical filter GF;

d11: the axial 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, and A16 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 (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】

To	Number of recurve points	Recurve point position 1	Recurve point position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	1	0.505	To
P2R2	0	To	To
P3R1	1	0.265	To
P3R2	2	0.495	0.985
P4R1	1	0.755	To
P4R2	1	1.295	To
P5R1	1	0.615	To
P5R2	1	0.675	To

【Table 4】

In addition, in the following Table 21, the values corresponding to the various parameters in the first embodiment and the parameters specified in the conditional expressions are also listed.

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 1.133mm, a full field of view image height of 3.203mm, a diagonal field of view angle of 106.40°, a large aperture, wide angle, ultra-thin, and Has 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
P1R1	0	To	To
P1R2	0	To	To
P2R1	1	0.515	To
P2R2	0	To	To
P3R1	1	0.265	To
P3R2	2	0.505	0.965
P4R1	1	0.785	To
P4R2	1	1.295	To
P5R1	1	0.605	To
P5R2	1	0.655	To

【Table 8】

In addition, in the following Table 21, 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 1.133mm, a full field of view image height of 3.203mm, a diagonal viewing angle of 106.00°, a large aperture, wide angle, ultra-thin, and Has 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】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	0	To	To	To
P1R2	0	To	To	To
P2R1	1	0.385	To	To
P2R2	0	To	To	To
P3R1	1	0.355	To	To
P3R2	3	0.535	0.935	1.185
P4R1	1	0.725	To	To
P4R2	1	1.315	To	To
P5R1	1	0.585	To	To
P5R2	1	0.685	To	To

【Table 12】

In addition, in the following Table 21, 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 1.191mm, a full field of view image height of 3.203mm, a diagonal field of view angle of 103.80°, a large aperture, wide angle, ultra-thin, and Has 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】

To	Number of recurve points	Recurve point position 1	Recurve point position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	1	0.535	To
P2R2	0	To	To
P3R1	1	0.255	To
P3R2	2	0.465	1.035
P4R1	1	0.785	To
P4R2	1	1.295	To
P5R1	1	0.605	To
P5R2	1	0.665	To

【Table 16】

To	Number of stationary points		Stagnation position 1
P1R1	0	To
P1R2	0	To
P2R1	0	To
P2R2	0	To
P3R1	1	0.455
P3R2	0	To
P4R1	1	1.105
P4R2	0	To
P5R1	1	1.185
P5R2	1	1.875

In addition, in the following Table 21, the values corresponding to the various parameters in the fourth embodiment and the parameters specified in the conditional expressions 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 40 has an entrance pupil diameter of 1.133mm, a full field of view image height of 3.203mm, a diagonal field of view angle of 107.40°, wide-angle, ultra-thin, and excellent Optical characteristics.

(Fifth Embodiment)

17 is a schematic diagram of the structure of the imaging optical lens 50 in the fifth embodiment. The fifth 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 17 and Table 18 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

【Table 17】

Table 18 shows the aspheric surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

【Table 18】

Table 19 and Table 20 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 50.

【Table 19】

To	Number of recurve points	Recurve point position 1	Recurve point position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	1	0.415	To
P2R2	0	To	To
P3R1	1	0.345	To
P3R2	2	0.485	1.125
P4R1	2	0.105	0.795
P4R2	1	1.275	To
P5R1	1	0.565	To
P5R2	1	0.625	To

【Table 20】

To	Number of stationary points		Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	1	0.605	To
P2R2	0	To	To
P3R1	1	0.605	To
P3R2	0	To	To
P4R1	2	0.175	1.075
P4R2	0	To	To
P5R1	1	1.395	To
P5R2	1	1.995	To

In addition, in the following Table 21, the values corresponding to the various parameters in the fifth embodiment and the parameters specified in the conditional expressions are also listed.

Figures 18 and 19 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 50. FIG. 20 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 50. The curvature of field S in FIG. 20 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 50 has an entrance pupil diameter of 1.171 mm, a full field of view image height of 3.203 mm, a diagonal field of view angle of 103.00 °, wide-angle, ultra-thin, and excellent Optical characteristics.

The following Table 21 lists the values of the corresponding conditional expressions in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment according to the above conditional expressions, as well as the values of other related parameters.

【Table 21】

Parameters and conditions	Example 1	Example 2	Example 3	Example 4	Example 5
f3/f	-3.08	-3.11	-4.95	-3.04	-3.00
d7/d8	10.94	11.86	7.05	7.04	7.02
(R5+R6)/(R5-R6)	3.44	3.42	8.03	3.43	9.65
R1/d1	31.58	25.16	20.20	39.50	20.00
f	2.550	2.550	2.680	2.550	2.634
f1	-5.609	-5.535	-6.665	-5.644	-5.820
f2	2.634	2.666	3.021	2.704	2.948
f3	-7.862	-7.929	-13.266	-7.754	-7.905
f4	1.666	1.513	2.207	1.693	2.209
f5	-2.104	-1.774	-3.097	-2.152	-4.106
f12	4.033	4.169	4.714	4.198	4.843
Fno	2.25	2.25	2.25	2.25	2.25

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, from the object side to the image side, it includes a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, and a positive refractive power. The fourth lens and the fifth lens with negative refractive power;

   Wherein, the overall focal length of the imaging optical lens is f, the focal length of the third lens is f3, the axial thickness of the first lens is d1, the radius of curvature of the object side surface of the first lens is R1, so 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 fourth lens is d7, and the image side surface of the fourth lens reaches the The on-axis distance of the fifth lens on the object side is d8, and satisfies the following relationship:

   -5.00≤f3/f≤-3.00;

   7.00≤d7/d8≤12.00;

   3.40≤(R5+R6)/(R5-R6)≤10.00;

   20.00≤R1/d1≤40.00.
2. The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the fifth lens is R9, and the radius of curvature of the image side surface of the fifth lens is R10, and the following relationship is satisfied:

   2.00≤(R9+R10)/(R9-R10)≤5.00.
3. The imaging optical lens of claim 1, wherein the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface of the second lens is R4, and the following relationship is satisfied:

   -5.00≤R3/R4≤-2.50.
4. The imaging optical lens of claim 1, wherein the focal length of the first lens is f1, the curvature radius of the object side surface of the first lens is R1, and the curvature radius of the image side surface of the first lens R2, the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

   -4.97≤f1/f≤-1.45;

   0.84≤(R1+R2)/(R1-R2)≤3.78;

   0.02≤d1/TTL≤0.06.
5. The imaging optical lens of claim 1, wherein the focal length of the second lens is f2, the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface of the second lens Is R4, the on-axis thickness of the second lens is d3, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   0.52≤f2/f≤1.69;

   0.22≤(R3+R4)/(R3-R4)≤1.00;

   0.07≤d3/TTL≤0.24.
6. The imaging optical lens of claim 1, wherein the axial thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.02≤d5/TTL≤ 0.09.
7. The imaging optical lens of claim 1, wherein the focal length of the fourth lens is f4, the radius of curvature of the object side of the fourth lens is R7, and the radius of curvature of the image side of the fourth lens is R7. R8, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied:

   0.30≤f4/f≤1.26;

   0.48≤(R7+R8)/(R7-R8)≤2.15;

   0.11≤d7/TTL≤0.37.
8. The imaging optical lens of claim 1, wherein the focal length of the fifth lens is f5, the axial thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and satisfies The following relationship:

   -3.12≤f5/f≤-0.46;

   0.03≤d9/TTL≤0.13.
9. The imaging optical lens of claim 1, wherein the image height of the imaging optical lens is IH, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: TTL/IH≤1.78.
10. The imaging optical lens of claim 1, wherein the field of view of the imaging optical lens is FOV, and the following relationship is satisfied: FOV≥103°.

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