WO2021128188A1 - Camera optical lens - Google Patents

Abstract

A camera optical lens (10, 20, 30), belonging to the field of optical lenses. The camera optical lens (10, 20, 30) comprises, from an object side to an image side in the following order: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7). The camera optical lens (10, 20, 30) satisfies the following relations: 100.00°≤FOV≤135.00°, 1.40≤(d1+d5)/d3≤2.50, and 8.00≤v1-v7≤23.00. The camera optical lens (10, 20, 30) can obtain high imaging performance while obtaining low TTL.

Description

Camera optical lens Technical field

This application relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as camera 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 coupled devices (CCD) or complementary metal oxide semiconductor devices (Complementary Metal). -Oxide Semiconductor Sensor, CMOS Sensor), and due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced, and the development trend of current electronic products with good functions, 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, as the pixel area of the photosensitive device continues to shrink and the system's requirements for image quality continue to increase, the seven-element lens structure gradually appears 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.

Application content

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

In order to solve the above technical problems, the embodiments of the present application provide 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 second lens with negative refractive power. Two lenses, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens, a sixth lens, and a seventh lens;

Preferably, the object side surface of the first lens is convex on the paraxial axis, and the image side surface is concave on the paraxial axis; the focal length of the imaging optical lens is f, the focal length of the first lens is f1, and the first lens The curvature radius of the object side surface is R1, the curvature radius of the image side surface of the first lens is R2, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -4.50≤f1/f≤-1.20; 0.67≤ (R1+R2)/(R1-R2)≤7.10; 0.03≤d1/TTL≤0.19.

Preferably, the imaging optical lens satisfies the following relationship: -2.82≤f1/f≤-1.50; 1.07≤(R1+R2)/(R1-R2)≤5.68; 0.05≤d1/TTL≤0.15.

Preferably, the object side of the second lens is concave on the paraxial; the focal length of the imaging optical lens is f, the focal length of the second lens is f2, and the radius of curvature of the object side of the second lens is R3, so The curvature radius of the image side surface of the second lens is R4, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: f2/f≤-11.21; -67.69≤(R3+R4)/(R3-R4) ≤-0.30; 0.04≤d3/TTL≤0.16.

Preferably, the imaging optical lens satisfies the following relationship: f2/f≤-14.02; -42.31≤(R3+R4)/(R3-R4)≤-0.38; 0.07≤d3/TTL≤0.13.

Preferably, the object side of the third lens is convex on the paraxial axis, and the image side is convex on the paraxial; the focal length of the imaging optical lens is f, the focal length of the third lens is f3, and the third lens The curvature radius of the object side surface is R5, the curvature radius of the image side surface of the third lens is R6, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.71≤f3/f≤4.29; -0.89≤( R5+R6)/(R5-R6)≤0.52; 0.03≤d5/TTL≤0.13.

Preferably, the imaging optical lens satisfies the following relationship: 1.13≤f3/f≤3.44; -0.55≤(R5+R6)/(R5-R6)≤0.41; 0.05≤d5/TTL≤0.11.

Preferably, the object side of the fourth lens is convex on the paraxial axis, and the image side is convex on the paraxial; the focal length of the imaging optical lens is f, the focal length of the fourth lens is f4, and the fourth lens The curvature radius of the object side is R7, the curvature radius of the image side of the fourth lens is R8, the axial thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.51≤f4/f≤1.67; 0.10≤(R7+R8)/(R7-R8)≤0.61; 0.04≤d7/TTL≤0.18.

Preferably, the imaging optical lens satisfies the following relationship: 0.82≤f4/f≤1.33; 0.16≤(R7+R8)/(R7-R8)≤0.48; 0.06≤d7/TTL≤0.14.

Preferably, the object side of the fifth lens is concave on the paraxial axis, and the image side is concave on the paraxial; the focal length of the imaging optical lens is f, the focal length of the fifth lens is f5, and the fifth lens The radius of curvature of the object side surface is R9, the radius of curvature of the image side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -3.01≤f5/f≤-0.89; -1.58≤(R9+R10)/(R9-R10)≤0.27; 0.02≤d9/TTL≤0.08.

Preferably, the imaging optical lens satisfies the following relationship: -1.88≤f5/f≤-1.12; -0.99≤(R9+R10)/(R9-R10)≤0.22; 0.04≤d9/TTL≤0.07.

Preferably, the object side surface of the sixth lens is convex on the paraxial axis, and the image side surface is concave on the paraxial axis; the focal length of the imaging optical lens is f, the focal length of the sixth lens is f6, and the sixth lens The radius of curvature of the object side surface is R11, the radius of curvature of the image side surface of the sixth lens is R12, the axial thickness of the sixth lens is d11, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 1.53≤f6/f≤7.29; -20.66≤(R11+R12)/(R11-R12)≤-2.81; 0.05≤d11/TTL≤0.19.

Preferably, the imaging optical lens satisfies the following relationship: 2.45≤f6/f≤5.83; -12.91≤(R11+R12)/(R11-R12)≤-3.51; 0.08≤d11/TTL≤0.15.

Preferably, the object side of the seventh lens is convex on the paraxial axis, and the image side is concave on the paraxial; the focal length of the imaging optical lens is f, the focal length of the seventh lens is f7, and the seventh lens The curvature radius of the object side surface is R13, the curvature radius of the image side surface 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 the following relationship is satisfied: -13.21≤f7/f≤-2.42; 1.84≤(R13+R14)/(R13-R14)≤11.92; 0.03≤d13/TTL≤0.09.

Preferably, the imaging optical lens satisfies the following relationship: -8.26≤f7/f≤-3.02; 2.94≤(R13+R14)/(R13-R14)≤9.54; 0.04≤d13/TTL≤0.07.

Preferably, the total optical length TTL of the imaging optical lens is less than or equal to 8.78 mm.

Preferably, the total optical length TTL of the imaging optical lens is less than or equal to 8.38 mm.

Preferably, the aperture F number of the imaging optical lens is less than or equal to 2.88.

Preferably, the aperture F number of the imaging optical lens is less than or equal to 2.83.

The beneficial effects of the present application are: the imaging optical lens according to the present application 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 application;

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 application;

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;

FIG. 9 is a schematic diagram of the structure of an imaging optical lens according to a third embodiment of the present application;

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;

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

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the various embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present application, many technical details are proposed in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in this application can be realized.

(First embodiment)

With reference to the drawings, the present application provides an imaging optical lens 10. FIG. 1 shows an imaging optical lens 10 according to the first embodiment of the application. 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, a third lens L3, an aperture S1, 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 imaging optical lens 10 is defined as FOV, 100.00°≤FOV≤135.00°. The field of view angle of the camera optical lens 10 is defined, and within the range, ultra-wide-angle camera can be realized and the user experience can be improved.

Define the on-axis thickness of the first lens L1 as d1, the on-axis thickness of the second lens L2 as d3, and the on-axis thickness of the third lens L3 as d5, 1.40≤(d1+d5)/d3≤2.50. Define the ratio of the sum of the on-axis thickness of the first lens L1 and the second lens L2 to the on-axis thickness of the third lens L3, within the range, reasonably control the thickness of the lens, which is more conducive to the processing of the lens and improves the product yield. lower the cost

Define the dispersion coefficient of the first lens L1 as v1, and the dispersion coefficient of the seventh lens as v7, 8.00≤v1-v7≤23.00. The difference between the dispersion coefficient of the first lens and the seventh lens is specified. Within the range, it can effectively correct the dispersion of the imaging optical lens, improve the sharpness of the imaging, close to the true color of the subject, and improve the imaging quality.

When the focal length of the imaging optical lens 10, the focal length of each lens, the refractive index of the related lens, the total optical length of the imaging optical lens 10, the axial thickness and the radius of curvature of the present application satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made to have High performance, and meet the design requirements of low TTL.

In this embodiment, the object side surface of the first lens L1 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has a negative refractive power.

The focal length of the overall imaging optical lens 10 is f, and the focal length of the first lens L1 is f1, which satisfies the following relationship: -4.50≤f1/f≤-1.20, 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 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, -2.82≤f1/f≤-1.50.

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: 0.67≤(R1+R2)/(R1-R2)≤7.10, reasonable control of the first lens L1 The shape of the first lens L1 can effectively correct the spherical aberration of the system. Preferably, 1.07≤(R1+R2)/(R1-R2)≤5.68.

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: 0.03≤d1/TTL≤0.19, which is conducive to achieving ultra-thinness. Preferably, 0.05≤d1/TTL≤0.15.

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

The focal length of the overall imaging optical lens 10 is f, and the focal length of the second lens L2 is f2, which satisfies the following relationship: -40158.79≤f2/f≤-11.21, by controlling the negative power of the second lens L2 within a reasonable range, Conducive to correcting the aberration of the optical system. Preferably, -25099.24≤f2/f≤-14.02.

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: -67.69≤(R3+R4)/(R3-R4)≤-0.30, which specifies the second When the shape of the lens L2 is within the range, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, -42.31≤(R3+R4)/(R3-R4)≤-0.38.

The on-axis 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: 0.04≤d3/TTL≤0.16, which specifies the on-axis thickness of the second lens L2 and the imaging optical lens 10 The ratio of the total optical length to TTL is conducive to achieving ultra-thinness. Preferably, 0.07≤d3/TTL≤0.13.

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 of the overall imaging optical lens 10 is f, and the focal length of the third lens L3 is f3, which satisfies the following relationship: 0.71≤f3/f≤4.29. Through the reasonable distribution of optical power, the system has better imaging quality and comparison. Low sensitivity. Preferably, 1.13≤f3/f≤3.44.

The curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the image side surface of the third lens L3 is R6, which satisfies the following relationship: -0.89≤(R5+R6)/(R5-R6)≤0.52, which can effectively control the third lens The shape of the lens 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 alleviated, and aberrations can be effectively reduced. Preferably, -0.55≤(R5+R6)/(R5-R6)≤0.41.

The axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.03≤d5/TTL≤0.13, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d5/TTL≤0.11.

In this embodiment, the object side surface of the fourth lens L4 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 of the overall imaging optical lens 10 is f, and the focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.51≤f4/f≤1.67. The reasonable distribution of optical power enables the system to have better imaging quality and comparison. Low sensitivity. Preferably, 0.82≤f4/f≤1.33.

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: 0.10≤(R7+R8)/(R7-R8)≤0.61, 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 helpful to correct the aberration of the off-axis angle of view. Preferably, 0.16≤(R7+R8)/(R7-R8)≤0.48.

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 relationship: 0.04≤d7/TTL≤0.18, which is beneficial to realize ultra-thinness. Preferably, 0.06≤d7/TTL≤0.14.

In this embodiment, the object side surface of the fifth lens L5 is concave at the paraxial position, and the image side surface is concave at the paraxial position, and has a negative refractive power.

The focal length of the overall imaging optical lens 10 is f, and the focal length of the fifth lens L5 is f5, which satisfies the following relationship: -3.01≤f5/f≤-0.89. The limitation on the fifth lens L5 can effectively make the light angle of the imaging lens Gentle, reduce tolerance sensitivity. Preferably, -1.88≤f5/f≤-1.12.

The radius of curvature of the object side surface of the fifth lens L5 is R9, and the radius of curvature of the image side surface of the fifth lens L5 is R10, which satisfies the following relationship: -1.58≤(R9+R10)/(R9-R10)≤0.27, which is the fifth When the shape of the lens L5 is within the range of conditions, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, -0.99≤(R9+R10)/(R9-R10)≤0.22.

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: 0.02≤d9/TTL≤0.08, which stipulates the on-axis thickness of the fifth lens L5 and the imaging optical lens 10 The ratio of the total optical length to TTL is conducive to achieving ultra-thinness. Preferably, 0.04≤d9/TTL≤0.07.

In this embodiment, the object side surface of the sixth lens L6 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 of the overall imaging optical lens 10 is f, and the focal length of the sixth lens L6 is f6, which satisfies the following relationship: 1.53≤f6/f≤7.29. Through the reasonable distribution of optical power, the system has better imaging quality and comparison. Low sensitivity. Preferably, 2.45≤f6/f≤5.83.

The curvature radius of the object side surface of the sixth lens L6 is R11, and the curvature radius of the image side surface of the sixth lens L6 is R12, which satisfies the following relationship: -20.66≤(R11+R12)/(R11-R12)≤-2.81. When the shape of the six lens 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, -12.91≤(R11+R12)/(R11-R12)≤-3.51.

The on-axis thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.05≤d11/TTL≤0.19, which is conducive to achieving ultra-thinness. Preferably, 0.08≤d11/TTL≤0.15.

In this embodiment, the object side surface of the seventh lens L7 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has a negative refractive power.

The focal length of the overall imaging optical lens 10 is f, and the focal length of the seventh lens L7 is f7, which satisfies the following relationship: -13.21≤f7/f≤-2.42. The reasonable distribution of the optical power enables the system to have better imaging quality And lower sensitivity. Preferably, -8.26≤f7/f≤-3.02.

The curvature radius of the object side surface of the seventh lens L7 is R13, and the curvature radius of the image side surface of the seventh lens L7 is R14, which satisfies the following relationship: 1.84≤(R13+R14)/(R13-R14)≤11.92, which specifies the seventh lens L7 When the shape of is within the range, as it develops toward ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view. Preferably, 2.94≤(R13+R14)/(R13-R14)≤9.54.

The axial thickness of the seventh lens L7 is d13, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.03≤d13/TTL≤0.09, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d13/TTL≤0.07.

In this embodiment, the total optical length TTL of the imaging optical lens 10 is less than or equal to 8.78 mm, which is beneficial to realize ultra-thinness. Preferably, the total optical length TTL of the imaging optical lens 10 is less than or equal to 8.38 mm.

In this embodiment, the aperture F number of the imaging optical lens 10 is less than or equal to 2.88. Large aperture, good imaging performance. Preferably, the aperture F number of the imaging optical lens 10 is less than or equal to 2.83.

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 application will be described below with an example. The symbols described in each example are as follows. The unit of focal length, distance on axis, radius of curvature, thickness on axis, position of inflection point, and position of stagnation point is mm. TTL: Total optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), the unit is mm;

Preferably, the object side and/or the image side of the lens can also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements. For specific implementations, refer to the following.

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

【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: dispersion coefficient;

v1: the dispersion coefficient of the first lens L1;

v2: the dispersion coefficient of the second lens L2;

v3: the dispersion coefficient of the third lens L3;

v4: the dispersion coefficient of the fourth lens L4;

v5: the dispersion coefficient of the fifth lens L5;

v6: the dispersion coefficient of the sixth lens L6;

v7: the dispersion coefficient of the seventh lens L7;

vg: the dispersion coefficient of the 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 application.

【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, this application 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 application. 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	2	0.965	1.435	To
P1R2	2	0.955	1.085	To
P2R1	0	To	To	To
P2R2	0	To	To	To
P3R1	1	0.455	To	To
P3R2	0	To	To	To
P4R1	1	0.265	To	To
P4R2	0	To	To	To
P5R1	0	To	To	To
P5R2	2	0.125	0.485	To
P6R1	1	0.455	To	To
P6R2	1	0.895	To	To
P7R1	3	0.415	1.105	1.595
P7R2	3	0.525	1.735	1.825

【Table 4】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	0	To	To
P2R2	0	To	To
P3R1	1	0.725	To
P3R2	0	To	To
P4R1	1	0.485	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	2	0.225	0.655
P6R1	1	0.805	To
P6R2	1	1.525	To
P7R1	2	0.925	1.285
P7R2	1	1.155	To

2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 656 nm, 588 nm, and 486 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 588 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 13 shows the values corresponding to the various values in each of Examples 1, 2, and 3 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 0.923mm, the full-field image height is 2.30mm, and the maximum angle of view of the imaging optical lens 10 is 100.99°. The external chromatic aberration is 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 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present application.

【table 5】

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

【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 of the second embodiment of the present application. 【Table 7】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	2	1.895	2.315	To
P1R2	2	1.215	1.275	To
P2R1	0	To	To	To
P2R2	3	0.585	0.755	0.895
P3R1	1	0.495	To	To
P3R2	0	To	To	To
P4R1	1	0.375	To	To
P4R2	0	To	To	To
P5R1	0	To	To	To
P5R2	0	To	To	To
P6R1	1	0.745	To	To
P6R2	1	1.015	To	To

P7R1	3	0.325	1.245	1.525
P7R2	3	0.475	1.745	1.905

【Table 8】

To	Number of stationary points	Stagnation position 1
P1R1	0	To
P1R2	0	To
P2R1	0	To
P2R2	0	To
P3R1	1	0.735
P3R2	0	To
P4R1	1	0.625
P4R2	0	To
P5R1	0	To
P5R2	0	To
P6R1	1	1.295
P6R2	1	1.505
P7R1	1	0.595
P7R2	1	0.985

6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 656 nm, 588 nm, and 486 nm passes 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 588 nm passes through the imaging optical lens 20 of the second embodiment.

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

In this embodiment, the entrance pupil diameter of the imaging optical lens 20 is 0.793mm, the full-field image height is 2.30mm, and the maximum field of view angle of the imaging optical lens 20 is 117.54°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is 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 and Table 10 show the design data of the imaging optical lens 30 of the third embodiment of the present application.

【Table 9】

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

【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 of the third embodiment of the present application.

【Table 11】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	2	1.865	2.205	To
P1R2	0	To	To	To
P2R1	0	To	To	To
P2R2	1	0.865	To	To
P3R1	1	0.365	To	To
P3R2	0	To	To	To
P4R1	1	0.355	To	To
P4R2	0	To	To	To
P5R1	0	To	To	To
P5R2	0	To	To	To
P6R1	1	0.785	To	To
P6R2	1	0.955	To	To
P7R1	3	0.345	1.195	1.365
P7R2	3	0.485	1.565	1.805

【Table 12】

To	Number of stationary points	Stagnation position 1
P1R1	0	To
P1R2	0	To
P2R1	0	To
P2R2	0	To
P3R1	1	0.565
P3R2	0	To
P4R1	1	0.595
P4R2	0	To
P5R1	0	To
P5R2	0	To
P6R1	0	To
P6R2	1	1.405
P7R1	1	0.635
P7R2	1	0.995

10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 656 nm, 588 nm, and 486 nm passes 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 588 nm after passing through the imaging optical lens 30 of the third embodiment.

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 system of this embodiment satisfies the above-mentioned conditional expression.

In this embodiment, the entrance pupil diameter of the imaging optical lens 30 is 0.699mm, the full-field image height is 2.30mm, and the maximum field of view angle of the imaging optical lens 30 is 132.95°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

【Table 13】

Parameters and conditions	Example 1	Example 2	Example 3
f	2.584	2.219	1.957
f1	-5.820	-4.116	-3.525
f2	-56.580	-37.329	-39298.150
f3	3.655	4.653	5.603
f4	2.870	2.266	2.089
f5	-3.832	-2.979	-2.942
f6	12.564	6.807	6.858
f7	-17.067	-8.044	-9.519
f12	-5.235	-3.757	-3.738
FNO	2.80	2.80	2.80
FOV	100.99°	117.54°	132.95°
(d1+d5)/d3	1.404	1.952	2.450
v1-v7	8.05	15.50	22.75

f12 is the combined focal length of the first lens L1 and the second lens L2, and FNO is the aperture F number of the imaging optical lens. Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the application, and in actual applications, various changes can be made to them in form and details without departing from the spirit and spirit of the application. range.

Claims (19)

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

   The maximum field of view of the imaging optical lens is FOV, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, and the on-axis thickness of the third lens is d5, so The dispersion coefficient of the first lens is v1, and the dispersion coefficient of the seventh lens is v7, which satisfies the following relationship:

   100.00°≤FOV≤135.00°;

   1.40≤(d1+d5)/d3≤2.50;

   8.00≤v1-v7≤23.00.
2. The imaging optical lens of claim 1, wherein the object side of the first lens is convex on the paraxial axis, and the image side of the first lens is concave on the paraxial axis;

   The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, and the imaging optics The total optical length of the lens is TTL and satisfies the following relationship:

   -4.50≤f1/f≤-1.20;

   0.67≤(R1+R2)/(R1-R2)≤7.10;

   0.03≤d1/TTL≤0.19.
3. 4. The imaging optical lens of claim 2, wherein the imaging optical lens satisfies the following relationship:

   -2.82≤f1/f≤-1.50;

   1.07≤(R1+R2)/(R1-R2)≤5.68;

   0.05≤d1/TTL≤0.15.
4. The imaging optical lens of claim 1, wherein the object side of the second lens is concave in the paraxial direction;

   The focal length of the imaging optical lens is f, the focal length of the second lens is f2, the curvature radius of the object side of the second lens is R3, the curvature radius of the image side surface of the second lens is R4, and the imaging optics The total optical length of the lens is TTL and satisfies the following relationship:

   f2/f≤-11.21;

   -67.69≤(R3+R4)/(R3-R4)≤-0.30;

   0.04≤d3/TTL≤0.16.
5. 4. The imaging optical lens of claim 4, wherein the imaging optical lens satisfies the following relationship:

   f2/f≤-14.02;

   -42.31≤(R3+R4)/(R3-R4)≤-0.38;

   0.07≤d3/TTL≤0.13.
6. The imaging optical lens of claim 1, wherein the object side of the third lens is convex on the paraxial axis, and the image side of the third lens is convex on the paraxial axis;

   The focal length of the imaging optical lens is f, the focal length of the third lens is f3, the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, and the imaging optics The total optical length of the lens is TTL and satisfies the following relationship:

   0.71≤f3/f≤4.29;

   -0.89≤(R5+R6)/(R5-R6)≤0.52;

   0.03≤d5/TTL≤0.13.
7. 7. The imaging optical lens of claim 6, wherein the imaging optical lens satisfies the following relationship:

   1.13≤f3/f≤3.44;

   -0.55≤(R5+R6)/(R5-R6)≤0.41;

   0.05≤d5/TTL≤0.11.
8. The imaging optical lens according to claim 1, wherein the object side of the fourth lens is convex on the paraxial axis, and the image side of the fourth lens is convex on the paraxial axis;

   The focal length of the imaging optical lens is f, 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 fourth lens has a radius of curvature of R8. The axial thickness of the lens is d7, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   0.51≤f4/f≤1.67;

   0.10≤(R7+R8)/(R7-R8)≤0.61;

   0.04≤d7/TTL≤0.18.
9. 8. The imaging optical lens of claim 8, wherein the imaging optical lens satisfies the following relationship:

   0.82≤f4/f≤1.33;

   0.16≤(R7+R8)/(R7-R8)≤0.48;

   0.06≤d7/TTL≤0.14.
10. The imaging optical lens of claim 1, wherein the object side of the fifth lens is concave on the paraxial axis, and the image side of the fifth lens is concave on the paraxial axis;

    The focal length of the imaging optical lens is f, 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, and the fifth lens has a focal length of f5. The axial thickness of the lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

    -3.01≤f5/f≤-0.89;

    -1.58≤(R9+R10)/(R9-R10)≤0.27;

    0.02≤d9/TTL≤0.08.
11. 10. The imaging optical lens of claim 10, wherein the imaging optical lens satisfies the following relationship:

    -1.88≤f5/f≤-1.12;

    -0.99≤(R9+R10)/(R9-R10)≤0.22;

    0.04≤d9/TTL≤0.07.
12. The imaging optical lens of claim 1, wherein the object side of the sixth lens is convex on the paraxial axis, and the image side of the sixth lens is concave on the paraxial axis;

    The focal length of the imaging optical lens is f, 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, and the sixth lens has a radius of curvature of R12. The axial thickness of the lens is d11, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

    1.53≤f6/f≤7.29;

    -20.66≤(R11+R12)/(R11-R12)≤-2.81;

    0.05≤d11/TTL≤0.19.
13. The imaging optical lens of claim 12, wherein the imaging optical lens satisfies the following relationship:

    2.45≤f6/f≤5.83;

    -12.91≤(R11+R12)/(R11-R12)≤-3.51;

    0.08≤d11/TTL≤0.15.
14. The imaging optical lens of claim 1, wherein the object side of the seventh lens is convex on the paraxial axis, and the image side of the seventh lens is concave on the paraxial axis;

    The focal length of the imaging optical lens is f, the focal length of the seventh lens is f7, 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, and the seventh lens has a radius of curvature of R14. The axial thickness of the lens is d13, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

    -13.21≤f7/f≤-2.42;

    1.84≤(R13+R14)/(R13-R14)≤11.92;

    0.03≤d13/TTL≤0.09.
15. The imaging optical lens of claim 14, wherein the imaging optical lens satisfies the following relational expression:

    -8.26≤f7/f≤-3.02;

    2.94≤(R13+R14)/(R13-R14)≤9.54;

    0.04≤d13/TTL≤0.07.
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 8.78 mm.
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 8.38 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 2.88.
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 2.83.

Images