WO2021128123A1 - Camera optical lens - Google Patents

Abstract

A camera optical lens (10). The camera optical lens (10) comprises in an order from the object side to the image side: a first lens (L1) having a negative refractive power, a second lens (L2) having a positive refractive power, a third lens (L3) having a positive refractive power, a fourth lens (L4) having a negative refractive power, a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7), and satisfies the following relational expressions: 100.00°≤FOV≤135.00°, -10.00≤f4/f≤-1.00, -2.00≤f7/f≤5.00, and -10.00≤(R3+R4)/(R3-R4)≤-3.50. The camera optical lens (10) can achieve both a high imaging performance and a low TTL.

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 devices (Complementary Metal -Oxide Semicondctor Sensor, CMOS Sensor), 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, light, thin and short appearance, therefore, has The miniaturized camera lens with good image quality has become the mainstream in the current market. In order to obtain better imaging quality, the lenses traditionally mounted on mobile phone cameras mostly adopt a three-element or four-element lens structure. Moreover, with the development of technology and the increase of diversified needs of users, the pixel area of photosensitive devices is shrinking, and the system's requirements for image quality continue to increase, five-element, six-element, and seven-element lens structures Gradually appeared in the lens design. There is an urgent need for a wide-angle camera lens with excellent optical characteristics, ultra-thin and fully corrected chromatic aberrations.

Summary of the invention

In view of the above-mentioned problems, the object of the present invention is to provide an imaging optical lens that can meet the requirements of ultra-thin and wide-angle while obtaining high imaging performance.

In order to solve the above technical problems, an embodiment of the present invention provides an imaging optical lens. The imaging optical lens includes, in order from the object side to the image side, a first lens with negative refractive power, and a first lens with positive refractive power. Two lenses, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens, a sixth lens, and a seventh lens;

The maximum field angle of the imaging optical lens is FOV, the focal length of the imaging optical lens is f, the focal length of the fourth lens is f4, the focal length of the seventh lens is f7, and the object side of the second lens The radius of curvature of is R3, and the radius of curvature of the image side surface of the second lens is R4, which satisfies the following relationship:

100.00°≤FOV≤135.00°;

-10.00≤f4/f≤-1.00;

-2.00≤f7/f≤5.00;

-10.00≤(R3+R4)/(R3-R4)≤-3.50.

Optionally, 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 d1, the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

-11.83≤f1/f≤-0.89;

-11.64≤(R1+R2)/(R1-R2)≤1.77;

0.03≤d1/TTL≤0.22.

Optionally, the camera optical lens satisfies the following relationship:

-7.40≤f1/f≤-1.11;

-7.27≤(R1+R2)/(R1-R2)≤1.42;

0.04≤d1/TTL≤0.17.

Optionally, the object side surface of the second lens is convex on the paraxial axis, and the image side surface of the second lens is concave on the paraxial axis;

The focal length of the second lens is f2, 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:

2.04≤f2/f≤122.36;

0.02≤d3/TTL≤0.14.

Optionally, the camera optical lens satisfies the following relationship:

3.26≤f2/f≤97.88;

0.03≤d3/TTL≤0.11.

Optionally, the object side surface and the image side surface of the third lens are both convex in the paraxial;

The focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, the radius of curvature of the image side of the third lens is R6, and the on-axis thickness of the third lens is d5. The total optical length of the camera optical lens is TTL and satisfies the following relationship:

0.37≤f3/f≤2.67;

-0.53≤(R5+R6)/(R5-R6)≤0.31;

0.03≤d5/TTL≤0.19.

Optionally, the camera optical lens satisfies the following relationship:

0.60≤f3/f≤2.14;

-0.33≤(R5+R6)/(R5-R6)≤0.25;

0.05≤d5/TTL≤0.15.

Optionally, 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, the axial thickness of the fourth lens is d7, and the total optical length of the imaging optical lens It is TTL and satisfies the following relationship:

-3.85≤(R7+R8)/(R7-R8)≤15.33;

0.02≤d7/TTL≤0.09.

Optionally, the camera optical lens satisfies the following relationship:

-2.41≤(R7+R8)/(R7-R8)≤12.26;

0.04≤d7/TTL≤0.07.

Optionally, the image side surface of the fifth lens is convex on the paraxial;

The focal length of the fifth lens is f5, 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, the on-axis thickness of the fifth lens is d9, the The total optical length of the camera optical lens is TTL and satisfies the following relationship:

-58.05≤f5/f≤2.44;

-26.04≤(R9+R10)/(R9-R10)≤1.48;

0.02≤d9/TTL≤0.18.

Optionally, the camera optical lens satisfies the following relationship:

-36.28≤f5/f≤1.95;

-16.27≤(R9+R10)/(R9-R10)≤1.18;

0.04≤d9/TTL≤0.15.

Optionally, the object side surface of the sixth lens is convex on the paraxial;

The focal length of the sixth lens is f6, the radius of curvature of the object side of the sixth lens is R11, the radius of curvature of the image side of the sixth lens is R12, the on-axis thickness of the sixth lens is d11, the The total optical length of the camera optical lens is TTL and satisfies the following relationship:

-47.96≤f6/f≤51.57;

-25.91≤(R11+R12)/(R11-R12)≤21.15;

0.04≤d11/TTL≤0.12.

Optionally, the camera optical lens satisfies the following relationship:

-29.97≤f6/f≤41.25;

-16.19≤(R11+R12)/(R11-R12)≤16.92;

0.06≤d11/TTL≤0.09.

Optionally, the image side surface of the seventh lens is concave on the paraxial;

The radius of curvature of the object side of the seventh lens is R13, the radius of curvature of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, the total optical length of the imaging optical lens is TTL, and Satisfy the following relations:

-10.12≤(R13+R14)/(R13-R14)≤2.58;

0.04≤d13/TTL≤0.19.

Optionally, the camera optical lens satisfies the following relationship:

-6.33≤(R13+R14)/(R13-R14)≤2.06;

0.06≤d13/TTL≤0.15.

Optionally, the total optical length TTL of the camera optical lens is less than or equal to 7.92 mm.

Optionally, the total optical length TTL of the camera optical lens is less than or equal to 7.56 mm.

Optionally, the aperture F number of the imaging optical lens is less than or equal to 2.32.

Optionally, the aperture F number of the imaging optical lens is less than or equal to 2.28.

The beneficial effects of the present invention are: the imaging optical lens according to the present invention has excellent optical characteristics, is ultra-thin, wide-angle, and fully compensated for chromatic aberration, and is especially suitable for mobile phone camera lenses composed of high-pixel CCD, CMOS and other imaging elements. Components and WEB camera lens.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an imaging optical lens according to a first embodiment of the present invention;

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 an imaging optical lens according to a second embodiment of the present invention;

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 an imaging optical lens according to a third embodiment of the present invention;

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;

13 is a schematic diagram of the structure of an imaging optical lens according to a fourth embodiment of the present invention;

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

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)

With reference to the drawings, the present invention provides an imaging 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 seven lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: a first lens L1, a second lens L2, an aperture S1, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens. Lens L6 and seventh lens L7. An optical element such as an optical filter GF may be provided on the image side of the seventh lens L7.

The first lens L1 is made of plastic, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens is made of plastic. The lens L7 is made of plastic.

The maximum angle of view of the camera optical lens is defined as FOV, 100.00°≤FOV≤135.00°, within this range, ultra-wide-angle photography can be achieved and user experience can be improved.

The focal length of the overall imaging optical lens 10 is defined as f, and the focal length of the fourth lens L4 is f4, -10.00≤f4/f≤-1.00, which specifies the negative refractive power of the fourth lens L4. When the upper limit is exceeded, although the lens is conducive to the development of ultra-thinness, the negative refractive power of the fourth lens L4 will be too strong, it is difficult to correct problems such as aberrations, and it is not conducive to the development of the lens to wide-angle. Conversely, when the lower limit is exceeded, the negative refractive power of the fourth lens L4 will become too weak, and it will be difficult for the lens to develop ultra-thin.

The focal length of the seventh lens L7 is f7, -2.00≤f7/f≤5.00, which specifies the refractive power of the seventh lens L7. When the seventh lens L7 exceeds the upper limit or the lower limit, the refractive power of the seventh lens L7 will become too weak, and it will be difficult for the lens to develop ultra-thin.

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, -10.00≤(R3+R4)/(R3-R4)≤-3.50, which stipulates the first When the shape of the two lens L2 is within the range, as it progresses toward ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view.

When the focal length of the imaging optical lens 10 of the present invention, the focal length of each lens, the refractive index of the relevant lens, the total optical length of the imaging optical lens, the axial thickness and the radius of curvature satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made high Performance and meet the design requirements of low TTL. TTL is the total optical length of the camera optical lens, that is, the on-axis distance from the object side of the first lens L1 to the imaging surface.

In this embodiment, the first lens L1 has a negative refractive power.

The focal length of the first lens L1 is defined as f1, -11.83≤f1/f≤-0.89, which specifies the ratio of the focal length of the first lens L1 to the overall focal length. When within the specified range, the first lens L1 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 and wide-angle lenses. Preferably, -7.40≤f1/f≤-1.11.

The curvature radius R1 of the object side surface of the first lens L1 and the curvature radius R2 of the image side surface of the first lens L1 satisfy the following relationship: -11.64≤(R1+R2)/(R1-R2)≤1.77, reasonable control of the first lens L1 The shape of the first lens L1 can effectively correct the spherical aberration of the system; preferably, -7.27≤(R1+R2)/(R1-R2)≤1.42.

The on-axis thickness of the first lens L1 is d1, which satisfies the following relationship: 0.03≤d1/TTL≤0.22, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d1/TTL≤0.17.

In this embodiment, the object side surface of the second lens L2 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has positive refractive power.

The focal length f2 of the second lens L2 satisfies the following relationship: 2.04≤f2/f≤122.36. 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. Preferably, 3.26≤f2/f≤97.88.

The on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.02≤d3/TTL≤0.14, which is beneficial to realize ultra-thinness. Preferably, 0.03≤d3/TTL≤0.11.

In this embodiment, the object side surface of the third lens L3 is convex at the paraxial position, and the image side surface is convex at the paraxial position, and has positive refractive power.

The focal length f3 of the third lens L3 satisfies the following relational expression: 0.37≤f3/f≤2.67. The reasonable distribution of optical power enables the system to have better imaging quality and lower sensitivity. Preferably, 0.60≤f3/f≤2.14.

The curvature radius R5 of the object side surface of the third lens L3 and the curvature radius R6 of the image side surface of the third lens L3 satisfy the following relationship: -0.53≤(R5+R6)/(R5-R6)≤0.31, which can effectively control the third lens The shape of L3 is conducive to the molding of the third lens L3. 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. Preferably, -0.33≤(R5+R6)/(R5-R6)≤0.25.

The on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.03≤d5/TTL≤0.19, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d5/TTL≤0.15.

In this embodiment, the fourth lens L4 has a negative refractive power.

The curvature radius R7 of the object side surface of the fourth lens L4 and the curvature radius R8 of the image side surface of the fourth lens L4 satisfy the following relationship: -3.85≤(R7+R8)/(R7-R8)≤15.33, the fourth lens is specified When the shape of L4 is within the range, with the development of ultra-thin and wide-angle, it is easy to correct problems such as the aberration of the off-axis angle of view. Preferably, -2.41≤(R7+R8)/(R7-R8)≤12.26.

The on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.02≤d7/TTL≤0.09, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d7/TTL≤0.07.

In this embodiment, the image side surface of the fifth lens L5 is convex at the paraxial position.

The focal length f5 of the fifth lens L5 satisfies the following relationship: -58.05≤f5/f≤2.44. The limitation of the fifth lens L5 can effectively make the light angle of the imaging lens smooth and reduce the tolerance sensitivity. Preferably, -36.28≤f5/f≤1.95.

The curvature radius R9 of the object side surface of the fifth lens L5 and the curvature radius R10 of the image side surface of the fifth lens L5 satisfy the following relationship: -26.04≤(R9+R10)/(R9-R10)≤1.48, the fifth lens is specified When the shape of L5 is within the range of conditions, with the development of ultra-thin and wide-angle, it is conducive to correcting the aberration of the off-axis angle of view. Preferably, -16.27≤(R9+R10)/(R9-R10)≤1.18.

The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.02≤d9/TTL≤0.18, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d9/TTL≤0.15.

In this embodiment, the object side surface of the sixth lens L6 is convex at the paraxial position.

The focal length f6 of the sixth lens L6 satisfies the following relational expression: -47.96≤f6/f≤51.57. Through the reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, -29.97≤f6/f≤41.25.

The curvature radius R11 of the object side surface of the sixth lens L6 and the curvature radius R12 of the image side surface of the sixth lens L6 satisfy the following relationship: -25.91≤(R11+R12)/(R11-R12)≤21.15, the sixth lens is specified When the shape of L6 is within the range of conditions, with the development of ultra-thin and wide-angle, it is conducive to correcting the aberration of the off-axis angle of view. Preferably, -16.19≤(R11+R12)/(R11-R12)≤16.92.

The on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.04≤d11/TTL≤0.12, which is beneficial to realize ultra-thinness. Preferably, 0.06≤d11/TTL≤0.09.

In this embodiment, the image side surface of the seventh lens L7 is concave at the paraxial position.

The curvature radius R13 of the object side surface of the seventh lens L7 and the curvature radius R14 of the image side surface of the seventh lens L7 satisfy the following relationship: -10.12≤(R13+R14)/(R13-R14)≤2.58, the seventh lens is specified When the shape of L7 is within the range of conditions, with the development of ultra-thin and wide-angle, it is conducive to correcting the aberration of off-axis angle of view. Preferably, -6.33≤(R13+R14)/(R13-R14)≤2.06.

The on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.04≤d13/TTL≤0.19, which is beneficial to realize ultra-thinness. Preferably, 0.06≤d13/TTL≤0.15.

In this embodiment, the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.92 millimeters, which is beneficial to achieve ultra-thinness. Preferably, the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.56 mm.

In this embodiment, the aperture F number of the imaging optical lens 10 is less than or equal to 2.32. Large aperture, good imaging performance. Preferably, the aperture F number of the imaging optical lens 10 is less than or equal to 2.28.

With such a design, the overall optical length TTL of the overall imaging optical lens 10 can be shortened as much as possible, and the characteristics of miniaturization can be maintained.

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.

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 shows 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 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 sixth lens L6;

R12: the radius of curvature of the image side surface of the sixth lens L6;

R13: the radius of curvature of the object side surface of the seventh lens L7;

R14: the radius of curvature of the image side surface of the seventh lens L7;

R15: the radius of curvature of the object side of the optical filter GF;

R16: 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 sixth lens L6;

d11: the on-axis thickness of the sixth lens L6;

d12: the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

d13: the on-axis thickness of the seventh lens L7;

d14: the on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

d15: the axial thickness of the optical filter GF;

d16: 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;

nd6: the refractive index of the d-line of the sixth lens L6;

nd7: the refractive index of the d-line of the seventh lens L7;

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;

v6: Abbe number of the sixth lens L6;

v7: Abbe number of the seventh lens L7;

vg: 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, A16, A18, A20 are aspherical 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 +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 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, P4R2 represent the object side and image side of the fourth lens L4, P5R1, P5R2 represent the object side and image side of the fifth lens L5, P6R1, P6R2 represent the object side and image side of the sixth lens L6, P7R1 P7R2 represents the object side and image side of the seventh lens L7, 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	Recurve point position 3
P1R1	1	0.655	To	To
P1R2	1	0.335	To	To
P2R1	1	0.615	To	To
P2R2	2	0.125	0.925	To
P3R1	2	0.675	1.025	To
P3R2	1	1.115	To	To

P4R1	1	0.925	To	To
P4R2	3	0.415	0.885	1.175
P5R1	2	0.535	0.945	To
P5R2	1	1.035	To	To
P6R1	1	1.605	To	To
P6R2	0	To	To	To
P7R1	2	0.285	1.715	To
P7R2	2	0.625	2.475	To

【Table 4】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	1	1.355	To
P1R2	1	0.605	To
P2R1	1	0.965	To
P2R2	2	0.205	1.095
P3R1	0	To	To
P3R2	0	To	To
P4R1	0	To	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	1	1.255	To
P6R1	0	To	To
P6R2	0	To	To
P7R1	1	0.495	To
P7R2	1	1.275	To

2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 555 nm, and 470 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. 4 is the field curvature in the sagittal direction, and T is the field curvature in the meridian direction. song.

The following Table 17 shows the values corresponding to the various numerical values in each of Examples 1, 2, 3, and 4 and the parameters specified in the conditional expressions.

As shown in Table 17, the first embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 1.951mm, the full field of view image height is 3.25mm, the maximum field of view is 100.20°, wide-angle, ultra-thin, and its on-axis and off-axis chromatic aberrations Fully corrected, and 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, and only the differences are listed below.

Table 5 shows 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】

Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

【Table 7】

To	Number of recurve points	Recurve point position 1	Recurve point position 2
P1R1	1	0.645	To
P1R2	1	1.225	To
P2R1	1	0.995	To

P2R2	0	To	To
P3R1	0	To	To
P3R2	0	To	To
P4R1	1	0.905	To
P4R2	2	0.165	0.795
P5R1	2	0.045	0.875
P5R2	1	1.145	To
P6R1	1	0.035	To
P6R2	1	1.775	To
P7R1	1	1.355	To
P7R2	2	0.465	2.335

【Table 8】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	1	1.375	To
P1R2	0	To	To
P2R1	0	To	To
P2R2	0	To	To
P3R1	0	To	To
P3R2	0	To	To
P4R1	0	To	To
P4R2	2	0.305	0.945
P5R1	2	0.065	1.025
P5R2	0	To	To
P6R1	1	0.055	To
P6R2	0	To	To
P7R1	0	To	To
P7R2	1	0.975	To

6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 555 nm, and 470 nm pass through the imaging optical lens 20 of the second embodiment. FIG. 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 20 of the second embodiment.

As shown in Table 17, the second embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 1.356mm, the full field of view image height is 3.25mm, the maximum field of view is 120.01°, wide-angle, ultra-thin, and its on-axis and off-axis chromatic aberrations Fully corrected, and 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, and only the differences are listed below.

Table 9 shows design data of the imaging optical lens 30 of 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】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	0	To	To	To
P1R2	1	1.215	To	To
P2R1	2	0.195	0.965	To
P2R2	2	0.235	0.675	To

P3R1	0	To	To	To
P3R2	0	To	To	To
P4R1	1	0.895	To	To
P4R2	1	0.945	To	To
P5R1	0	To	To	To
P5R2	1	0.985	To	To
P6R1	1	0.065	To	To
P6R2	3	0.395	1.305	1.705
P7R1	2	0.575	1.795	To
P7R2	2	0.795	2.615	To

【Table 12】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	1	0.315	To
P2R2	2	0.385	0.775
P3R1	0	To	To
P3R2	0	To	To
P4R1	0	To	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	0	To	To
P6R1	1	0.095	To
P6R2	1	0.905	To
P7R1	2	1.185	2.265
P7R2	1	1.545	To

10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 555 nm, and 470 nm pass through the imaging optical lens 30 of the third embodiment. FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 30 of the third embodiment.

The following Table 17 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical system of this embodiment satisfies the above-mentioned conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 0.975mm, the full field of view image height is 3.25mm, the maximum field of view is 134.74°, wide-angle, ultra-thin, and its on-axis and off-axis chromatic aberrations Fully corrected, and has excellent optical characteristics.

(Fourth embodiment)

The fourth embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.

Table 13 shows design data of the imaging optical lens 40 of 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 of the fourth embodiment of the present invention.

【Table 15】

To	Number of recurve points	Recurve point position 1	Recurve point position 2
P1R1	1	0.825	To
P1R2	2	0.475	1.225
P2R1	1	0.665	To
P2R2	1	0.515	To
P3R1	0	To	To

P3R2	0	To	To
P4R1	1	0.935	To
P4R2	1	0.955	To
P5R1	1	0.935	To
P5R2	1	0.615	To
P6R1	1	0.565	To
P6R2	1	0.935	To
P7R1	2	0.205	1.505
P7R2	2	0.625	2.415

【Table 16】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	1	1.735	To
P1R2	1	0.825	To
P2R1	1	1.055	To
P2R2	1	0.945	To
P3R1	0	To	To
P3R2	0	To	To
P4R1	0	To	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	1	0.985	To
P6R1	1	1.055	To
P6R2	1	1.775	To
P7R1	2	0.355	2.075
P7R2	1	1.275	To

14 and 15 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 555 nm, and 470 nm pass through the imaging optical lens 40 of the fourth embodiment. FIG. 16 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 40 of the fourth embodiment.

The following Table 17 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical system of this embodiment satisfies the above-mentioned conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 1.659mm, the full field of view image height is 3.25mm, the maximum field of view is 100.16°, wide-angle, ultra-thin, and its on-axis and off-axis chromatic aberrations Fully corrected, and has excellent optical characteristics.

【Table 17】

Parameters and conditions	Example 1	Example 2	Example 3	Example 4
f	3.387	2.909	2.199	3.458
f1	-20.039	-4.324	-2.933	-10.571
f2	98.023	11.855	179.347	15.480
f3	5.955	2.533	3.917	2.581
f4	-3.421	-11.635	-21.976	-6.915
f5	2.405	4.730	2.439	-100.351

f6	-81.214	100.000	-3.396	13.355
f7	-6.791	-2.811	10.982	-5.959
f12	-25.796	-7.001	-2.991	-37.878
FNO	1.74	2.15	2.26	2.09
FOV	100.21°	120.01°	134.74°	100.16°
f4/f	-1.01	-4.00	-10.00	-2.00
f7/f	-2.01	-0.97	5.00	-1.72
(R3+R4)/(R3-R4)	-3.51	-5.00	-10.00	-9.00

FNO is the aperture F number of the camera optical lens;

f12 represents the combined focal length of the first lens L1 and the second lens L2.

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 (19)

1. 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 first lens with positive refractive power. Three lenses, a fourth lens with negative refractive power, a fifth lens, a sixth lens, and a seventh lens;

   The maximum field angle of the imaging optical lens is FOV, the focal length of the imaging optical lens is f, the focal length of the fourth lens is f4, the focal length of the seventh lens is f7, and the object side of the second lens The radius of curvature of is R3, and the radius of curvature of the image side surface of the second lens is R4, which satisfies the following relationship:

   100.00°≤FOV≤135.00°;

   -10.00≤f4/f≤-1.00;

   -2.00≤f7/f≤5.00;

   -10.00≤(R3+R4)/(R3-R4)≤-3.50.
2. 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 , And the axial thickness of the first lens is d1, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   -11.83≤f1/f≤-0.89;

   -11.64≤(R1+R2)/(R1-R2)≤1.77;

   0.03≤d1/TTL≤0.22.
3. 4. The imaging optical lens of claim 2, wherein the imaging optical lens satisfies the following relationship:

   -7.40≤f1/f≤-1.11;

   -7.27≤(R1+R2)/(R1-R2)≤1.42;

   0.04≤d1/TTL≤0.17.
4. 4. The imaging optical lens of claim 1, wherein the object side surface of the second lens is convex on the par axis, and the image side surface of the second lens is concave on the par axis;

   The focal length of the second lens is f2, 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:

   2.04≤f2/f≤122.36;

   0.02≤d3/TTL≤0.14.
5. 4. The imaging optical lens of claim 4, wherein the imaging optical lens satisfies the following relationship:

   3.26≤f2/f≤97.88;

   0.03≤d3/TTL≤0.11.
6. The imaging optical lens of claim 1, wherein the object side surface and the image side surface of the third lens are both convex in the paraxial;

   The focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, the radius of curvature of the image side of the third lens is R6, and the on-axis thickness of the third lens is d5. The total optical length of the camera optical lens is TTL and satisfies the following relationship:

   0.37≤f3/f≤2.67;

   -0.53≤(R5+R6)/(R5-R6)≤0.31;

   0.03≤d5/TTL≤0.19.
7. 7. The imaging optical lens of claim 6, wherein the imaging optical lens satisfies the following relationship:

   0.60≤f3/f≤2.14;

   -0.33≤(R5+R6)/(R5-R6)≤0.25;

   0.05≤d5/TTL≤0.15.
8. The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, and the on-axis thickness of the fourth lens Is d7, the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

   -3.85≤(R7+R8)/(R7-R8)≤15.33;

   0.02≤d7/TTL≤0.09.
9. 8. The imaging optical lens of claim 8, wherein the imaging optical lens satisfies the following relationship:

   -2.41≤(R7+R8)/(R7-R8)≤12.26;

   0.04≤d7/TTL≤0.07.
10. The imaging optical lens of claim 1, wherein the image side surface of the fifth lens is convex in the paraxial;

    The focal length of the fifth lens is f5, 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, the on-axis thickness of the fifth lens is d9, the The total optical length of the camera optical lens is TTL and satisfies the following relationship:

    -58.05≤f5/f≤2.44;

    -26.04≤(R9+R10)/(R9-R10)≤1.48;

    0.02≤d9/TTL≤0.18.
11. 10. The imaging optical lens of claim 10, wherein the imaging optical lens satisfies the following relationship:

    -36.28≤f5/f≤1.95;

    -16.27≤(R9+R10)/(R9-R10)≤1.18;

    0.04≤d9/TTL≤0.15.
12. The imaging optical lens of claim 1, wherein the object side surface of the sixth lens is convex in the paraxial;

    The focal length of the sixth lens is f6, the radius of curvature of the object side of the sixth lens is R11, the radius of curvature of the image side of the sixth lens is R12, the on-axis thickness of the sixth lens is d11, the The total optical length of the camera optical lens is TTL and satisfies the following relationship:

    -47.96≤f6/f≤51.57;

    -25.91≤(R11+R12)/(R11-R12)≤21.15;

    0.04≤d11/TTL≤0.12.
13. The imaging optical lens of claim 12, wherein the imaging optical lens satisfies the following relationship:

    -29.97≤f6/f≤41.25;

    -16.19≤(R11+R12)/(R11-R12)≤16.92;

    0.06≤d11/TTL≤0.09.
14. The imaging optical lens of claim 1, wherein the image side surface of the seventh lens is concave in the paraxial;

    The radius of curvature of the object side of the seventh lens is R13, the radius of curvature of the image side of the seventh lens is R14, the axial thickness of the seventh lens is d13, the total optical length of the imaging optical lens is TTL, and Satisfy the following relations:

    -10.12≤(R13+R14)/(R13-R14)≤2.58;

    0.04≤d13/TTL≤0.19.
15. The imaging optical lens of claim 14, wherein the imaging optical lens satisfies the following relational expression:

    -6.33≤(R13+R14)/(R13-R14)≤2.06;

    0.06≤d13/TTL≤0.15.
16. The imaging optical lens of claim 1, wherein the total optical length TTL of the imaging optical lens is less than or equal to 7.92 millimeters.
17. The imaging optical lens of claim 16, wherein the total optical length TTL of the imaging optical lens is less than or equal to 7.56 mm.
18. The imaging optical lens of claim 1, wherein the aperture F number of the imaging optical lens is less than or equal to 2.32.
19. 18. The imaging optical lens of claim 18, wherein the aperture F number of the imaging optical lens is less than or equal to 2.28.

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