WO2021097953A1

WO2021097953A1 - Photographing optical lens

Info

Publication number: WO2021097953A1
Application number: PCT/CN2019/123898
Authority: WO
Inventors: 石荣宝
Original assignee: 诚瑞光学(常州)股份有限公司
Priority date: 2019-11-22
Filing date: 2019-12-09
Publication date: 2021-05-27
Also published as: CN110749981B; CN110749981A

Abstract

Disclosed is a photographing optical lens, sequentially including, from an object side to an image side, the focal length of the photographing optical lens being f, the focal length of the third lens being f3, the radius of curvature of an object side face of the first lens being R1, the radius of curvature of an object side face of the fourth lens being R7, the radius of curvature of an image side face of the fourth lens being R8, the on-axis thickness of the first lens being d1, the on-axis thickness of the fourth lens being d7, and the on-axis thickness of the fifth lens being d9, meeting the following relational expressions: -5.00 ≤ f3/f ≤ -3.00, -20.00 ≤ R1/d1 ≤ -14.00, 0 ≤ (R7 + R8)/(R7 - R8) ≤ 1.00, and 3.00 ≤ d7/d9 ≤ 5.00. The photographing optical lens meets the requirements of a wide-angle and ultrathin design while exhibiting 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

In recent years, with the rise of smart phones, the demand for miniaturized photographic lenses has increased. The photosensitive devices of general photographic lenses are nothing more than photosensitive coupling devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor device (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor) two types, and due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced. In addition, the development trend of current electronic products with good functions, thin and short appearances, therefore, miniaturization with good imaging quality Camera lenses have become the mainstream in the current market.

technical problem

In order to obtain better imaging quality, the lenses traditionally mounted in mobile phone cameras mostly adopt three-element and four-element lens structures. However, with the development of technology and the increase in the diversified needs of users, the pixel area of the photosensitive device continues to shrink, and the system's requirements for image quality continue to increase, the five-element lens structure gradually appears in the lens design, and it is common Although the five-element lens has good optical performance, its optical power, lens spacing and lens shape settings are still unreasonable, resulting in a lens structure that has good optical performance and cannot meet the requirements of ultra-thinness. , Wide-angle design requirements.

Technical solutions

In view of the above-mentioned problems, the object of the present invention is to provide an imaging optical lens, which has good optical performance and meets the design requirements of ultra-thin and wide-angle.

In order to solve the above technical problems, the embodiments of the present invention provide the imaging optical lens, which sequentially includes from the object side to the image side: a first lens with negative refractive power, a second lens with positive refractive power, and A third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power;

The focal length of the imaging optical lens is f, the focal length of the third lens is f3, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the object side of the fourth lens is R7, and the fourth lens has a radius of curvature of R7. The curvature radius of the image side surface of the lens is R8, the on-axis thickness of the first lens is d1, the on-axis thickness of the fourth lens is d7, and the on-axis thickness of the fifth lens is d9, which satisfies the following relationship:

-5.00≤f3/f≤-3.00;

-20.00≤R1/d1≤-14.00;

0≤(R7+R8)/(R7-R8)≤1.00;

3.00≤d7/d9≤5.00.

Preferably, 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 second lens is R4, which satisfies the following relationship:

-1.00≤(R3+R4)/(R3-R4)≤0.

Preferably, the focal length of the fifth lens is f5, which satisfies the following relationship:

-1.50≤f5/f≤-0.80.

Preferably, the focal length of the first lens is f1, the radius of curvature of the image side surface of the first lens is R2, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:

-4.57≤f1/f≤-1.12;

-0.27≤(R1+R2)/(R1-R2)≤-0.02;

0.02≤d1/TTL≤0.07.

Preferably, the focal length of the second lens is f2, the on-axis thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:

0.55≤f2/f≤1.87;

0.07≤d3/TTL≤0.23.

Preferably, the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the image side surface of the third lens is R6, the axial thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, satisfies the following relationship:

1.87≤(R5+R6)/(R5-R6)≤9.17;

0.02≤d5/TTL≤0.06.

Preferably, the focal length of the fourth lens is f4, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:

0.36≤f4/f≤1.58;

0.10≤d7/TTL≤0.31.

Preferably, the radius of curvature of the object side of the fifth lens is R9, the radius of curvature of the image side of the fifth lens is R10, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:

0.86≤(R9+R10)/(R9-R10)≤4.48;

0.03≤d9/TTL≤0.10.

Preferably, the field of view of the imaging optical lens is FOV, which satisfies the following relationship:

FOV≥114°.

Preferably, the combined focal length of the first lens and the second lens is f12, which satisfies the following relationship:

0.77≤f12/f≤3.14.

Beneficial effect

The beneficial effects of the present invention are: the imaging optical lens according to the present invention has good optical performance, wide-angle and ultra-thin characteristics, and is especially suitable for mobile phone camera lens assemblies composed of high-pixel CCD, CMOS and other imaging elements And WEB camera lens.

Description 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 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;

FIG. 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 the 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.

Embodiments of the present invention

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 the drawings, the present invention provides a camera optical lens 10. FIG. 1 shows an imaging optical lens 10 according to a first embodiment of the present invention. The imaging optical lens 10 includes five lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: a first lens L1 with a negative refractive power, an aperture S1, a second lens L2 with a positive refractive power, and a third lens with a negative refractive power. The lens L3, the fourth lens L4 with positive refractive power, and the fifth lens L5 with negative refractive power. 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 focal length of the imaging optical lens 10 is defined as f, and the focal length of the third lens L3 is defined as f3, and the following relationship is satisfied: -5.00≤f3/f≤-3.00, and the third lens L3 is defined The ratio of the focal length of φ to the focal length of the imaging optical lens 10 can effectively balance the spherical aberration and field curvature of the system within the range of the conditional expression.

The curvature radius of the object side of the first lens L1 is R1, and the on-axis thickness of the first lens L1 is d1, which satisfies the following relationship: -20.00≤R1/d1≤-14.00, which specifies the object side of the first lens L1 The ratio of the radius of curvature to the thickness of the first lens L1, within the range of the conditional expression, helps to improve the performance of the optical system.

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≤(R7+R8)/(R7-R8)≤1.00, which is specified The shape of the fourth lens L4 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.

The on-axis thickness of the fourth lens L4 is d7, and the on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 3.00≤d7/d9≤5.00, which specifies the thickness of the fourth lens L4 and the fifth lens The ratio of the thickness of L5, within the range of the conditional formula, helps to compress the total length of the optical system and achieve an ultra-thin effect.

Define the curvature radius of the object side surface of the second lens L2 as R3, and the curvature radius of the image side surface of the second lens L2 as R4, satisfying the following relationship: -1.00≤(R3+R4)/(R3-R4)≤0 , Specifies the shape of the second lens L2, within the scope of the conditional formula, can relax the degree of deflection of light passing through the lens, and effectively reduce aberrations.

The focal length of the fifth lens L5 is defined as f5, which satisfies the following relational formula: -1.50≤f5/f≤-0.80, which specifies the ratio of the focal length of the fifth lens L5 to the focal length of the imaging optical lens 10, through a reasonable allocation of focal lengths , So that the system has better imaging quality and lower sensitivity.

The focal length of the first lens L1 is defined as f1, which satisfies the following relational expression: -4.57≤f1/f≤-1.12, which specifies the ratio of the focal length of the first lens L1 to the focal length of the imaging optical lens 10, which is within the range of the conditional expression , The first lens L1 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.

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: -0.27≤(R1+R2)/(R1-R2)≤-0.02 , Within the scope of the conditional expression, reasonably control the shape of the first lens L1 so that the first lens L1 can effectively correct the spherical aberration of the system.

The total optical length of the imaging optical lens 10 is TTL, and the on-axis thickness of the first lens L1 is d1, which satisfies the following relationship: 0.02≤d1/TTL≤0.07. Within the range of the conditional expression, it is beneficial to achieve ultra-thinness .

The focal length of the second lens L2 is defined as f2, which satisfies the following relational formula: 0.55≤f2/f≤1.87, which specifies the ratio of the focal length of the second lens L2 to the focal length of the imaging optical lens 10, which is within the range of the conditional formula , By controlling the positive refractive power of the second lens L2 in a reasonable range, it is beneficial to correct the aberration of the optical system.

The on-axis thickness of the second lens L2 is d3, which satisfies the following relational expression: 0.07≤d3/TTL≤0.23. Within the range of the conditional expression, it is beneficial to realize ultra-thinness.

Define the radius of curvature of the object side surface of the third lens L3 as R5, and the radius of curvature of the image side surface of the third lens L3 as R6, satisfying the following relationship: 1.87≤(R5+R6)/(R5-R6)≤9.17 , The shape of the third lens L3 is specified, and within the scope of the conditional expression, the degree of deflection of the light passing through the third lens L3 can be alleviated, and aberrations can be effectively reduced.

The on-axis thickness of the third lens L3 is d5, which satisfies the following relational expression: 0.02≤d5/TTL≤0.06. Within the range of the conditional expression, it is beneficial to realize ultra-thinness.

The focal length of the fourth lens L4 is defined as f4, and satisfies the following relational expression: 0.36≤f4/f≤1.58, which specifies the ratio of the focal length of the fourth lens L4 to the focal length of the imaging optical lens 10, which is within the range of the conditional expression The internal helps to improve the performance of the optical system.

The axial thickness of the fourth lens L4 is d7, which satisfies the following relational expression: 0.10≤d7/TTL≤0.31. Within the range of the conditional expression, it is beneficial to realize ultra-thinness.

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, satisfying the following relationship: 0.86≤(R9+R10)/(R9-R10)≤4.48 , Stipulates the shape of the fifth lens L5. When the condition is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.

The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relational expression: 0.03≤d9/TTL≤0.10. Within the range of the conditional expression, it is beneficial to realize ultra-thinness.

Further, the field angle of the imaging optical lens is defined as FOV, which satisfies the following relationship: FOV≥114°, which is conducive to achieving a wide-angle.

Define the combined focal length of the first lens L1 and the second lens L2 as f12, which satisfies the following relational expression: 0.77≤f12/f≤3.14, within the range of the conditional expression, the aberration of the imaging optical lens 10 can be eliminated And distortion, and can suppress the back focal length of the imaging optical lens 10, and maintain the miniaturization of the image lens system group.

That is, when the above-mentioned relationship is satisfied, the imaging optical lens 10 can not only have good optical imaging performance, but also meet the design requirements of wide-angle and ultra-thin; according to the characteristics of the imaging optical lens 10, the imaging optical lens 10It is especially suitable for mobile phone camera lens assembly and WEB camera lens composed of high-pixel CCD, CMOS and other imaging elements.

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, on-axis distance, radius of curvature, on-axis thickness, inflection point position, stagnation point position is mm.

TTL: total optical length (the on-axis distance from the object side of the first lens L1 to the image plane Si), 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.

Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

【Table 1】

Among them, the meaning of each symbol 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 surface 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 surface 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 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: the 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;

Νd: Abbe number;

Ν1: Abbe number of the first lens L1;

Ν2: Abbe number of the second lens L2;

Ν3: Abbe number of the third lens L3;

Ν4: Abbe number of the fourth lens L4;

Ν5: Abbe number of the fifth lens L5;

Νg: Abbe number of optical filter GF.

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

【Table 2】

Among them, k is the conic coefficient, and A4, A6, A8, A10, A12, A14, and A16 are the aspheric coefficients.

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 the first embodiment of the present invention. 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】

2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm pass through the imaging optical lens 10 of the first embodiment. 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 of the first embodiment. The field curvature S in FIG. .

The following Table 13 shows the values corresponding to the various values in the first, second, and third embodiments and the parameters that have been specified in the conditional expressions.

As shown in Table 13, the first embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens 10 is 0.951 mm, the full-field image height is 2.620 mm, and the diagonal field angle is 114.80°, which makes the imaging optical lens 10 wide-angle. , Ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

(Second Embodiment)

The second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment. The structure of the imaging optical lens 20 of the second embodiment is shown in FIG. 5, and 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 according to the second embodiment of the present invention.

【Table 7】

【Table 8】

6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 435 nm, 486 nm, 546 nm, 587 nm, and 656 nm pass through the imaging optical lens 20 of the second embodiment. FIG. 8 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S in FIG. 8 is the field curvature in the sagittal direction, and T is the field curvature in the meridian direction. .

The following Table 13 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical lens 20 of this embodiment satisfies the above-mentioned conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens 20 is 0.953 mm, the full-field image height is 2.620 mm, and the diagonal field angle is 117.60°, so that the imaging optical lens 20 has a wide angle. , Ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

(Third Embodiment)

The third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment. Please refer to FIG. 9 for the structure of the imaging optical lens 30 of the third embodiment. 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 inflection point and stagnation point design data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

【Table 11】

【Table 12】

10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 436 nm, 486 nm, 546 nm, 588 nm, and 656 nm pass through the imaging optical lens 30 of the third embodiment. FIG. 12 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. The field curvature S in FIG. 12 is the field curvature in the sagittal direction, and T is the field curvature in the meridian direction. .

The following Table 13 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical lens 30 of this embodiment satisfies the above-mentioned conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens 30 is 0.921 mm, the full field of view image height is 2.620 mm, and the diagonal field angle is 116.80°, which makes the imaging optical lens 30 wide-angle. , Ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

【Table 13】

Among them, define the Fno of the camera optical lens.

A person of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present invention, and in practical applications, various changes can be made to them in form and details without departing from the spirit and spirit of the present invention. range.

Claims

An imaging optical lens, characterized in that, from the object side to the image side, the imaging optical lens includes a first lens with negative refractive power, a second lens with positive refractive power, and a second lens with negative refractive power. Three lenses, a fourth lens with positive refractive power, and a fifth lens with negative refractive power;

The focal length of the imaging optical lens is f, the focal length of the third lens is f3, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the object side of the fourth lens is R7, and the fourth lens has a radius of curvature of R7. The curvature radius of the image side surface of the lens is R8, the on-axis thickness of the first lens is d1, the on-axis thickness of the fourth lens is d7, and the on-axis thickness of the fifth lens is d9, which satisfies the following relationship:

-5.00≤f3/f≤-3.00;

-20.00≤R1/d1≤-14.00;

0≤(R7+R8)/(R7-R8)≤1.00;

3.00≤d7/d9≤5.00.
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, which satisfies the following relationship:

-1.00≤(R3+R4)/(R3-R4)≤0.
The imaging optical lens of claim 1, wherein the focal length of the fifth lens is f5, which satisfies the following relationship:

-1.50≤f5/f≤-0.80.
The imaging optical lens of claim 1, wherein the focal length of the first lens is f1, the curvature radius of the image side surface of the first lens is R2, and the total optical length of the imaging optical lens is TTL, which satisfies The following relationship:

-4.57≤f1/f≤-1.12;

-0.27≤(R1+R2)/(R1-R2)≤-0.02;

0.02≤d1/TTL≤0.07.
The imaging optical lens of claim 1, wherein the focal length of the second lens is f2, the axial thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, which satisfies the following Relationship:

0.55≤f2/f≤1.87;

0.07≤d3/TTL≤0.23.
The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the image side surface of the third lens is R6, and the on-axis thickness of the third lens Is d5, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship:

1.87≤(R5+R6)/(R5-R6)≤9.17;

0.02≤d5/TTL≤0.06.
The imaging optical lens of claim 1, wherein the focal length of the fourth lens is f4, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:

0.36≤f4/f≤1.58;

0.10≤d7/TTL≤0.31.
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 total optical length of the imaging optical lens is TTL, satisfies the following relationship:

0.86≤(R9+R10)/(R9-R10)≤4.48;

0.03≤d9/TTL≤0.10.
The imaging optical lens of claim 1, wherein the field of view of the imaging optical lens is FOV, which satisfies the following relationship:

FOV≥114°.
The imaging optical lens of claim 1, wherein the combined focal length of the first lens and the second lens is f12, which satisfies the following relationship:

0.77≤f12/f≤3.14.