WO2021128147A1 - Camera optical lens - Google Patents

Abstract

A camera optical lens (10), sequentially comprising 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) from an object side to an image side. The maximum field of view of the camera optical lens is FOV, the axial thickness of the first lens (L1) is d1, the axial thickness of the third lens (L3) is d5, the axial thickness of the second lens (L2) is d3, the Abbe number of the first lens (L1) is v1, and the Abbe number of the seventh lens (L7) is v7; and the following relationships are satisfied: 100.00 degrees ≤ FOV ≤ 135.00 degrees, 2.50 ≤ (d1+d5)/d3 ≤ 4.00, and 10.00 ≤ v1-v7 ≤ 30.00. The camera optical lens (10) can achieve a low TTL while achieving high imaging 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 smartphones, 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). -OxideSemiconductor Sensor, CMOS Sensor), and due to the improvement of semiconductor manufacturing process 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 a good The miniaturized camera lens with 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 on-axis thickness of the first lens is d1, the on-axis thickness of the third lens is d5, and the on-axis thickness of the second lens is d3, so The Abbe number of the first lens is v1, and the Abbe number of the seventh lens is v7, which satisfies the following relationship:

100.00°≤FOV≤135.00°, 2.50≤(d1+d5)/d3≤4.00, 10.00≤ v1-v7≤30.00.

Preferably, the object side surface of the first lens is concave on the paraxial axis, and the image side surface is concave on the par axis; the focal length of the first lens is f1, the focal length of the imaging optical lens is f, 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:

-4.47≤f1/f≤-1.09; -0.10≤(R1+R2)/(R1-R2)≤1.04; 0.03≤d1/TTL≤0.17.

Preferably, the imaging optical lens satisfies the following relationship:

-2.79≤f1/f≤-1.37; -0.06≤(R1+R2)/(R1-R2)≤0.84; 0.05≤d1/TTL≤0.14.

Preferably, the object side surface of the second lens is convex on the paraxial axis, and the image side surface is concave on the paraxial axis; the focal length of the second lens is f2, the focal length of the imaging optical lens is f, and the second lens The curvature radius of the object side is R3, the curvature radius of the image side of the second lens is R4, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

3.38≤f2/f≤33.57; -552.14≤(R3+R4)/(R3-R4)≤28.81; 0.02≤d3/TTL≤0.12.

Preferably, the imaging optical lens satisfies the following relationship:

5.42≤f2/f≤26.86; -345.09≤(R3+R4)/(R3-R4)≤23.04; 0.04≤d3/TTL≤0.09.

Preferably, the object side surface of the third lens is convex on the paraxial axis, and the image side surface is convex on the paraxial axis; the focal length of the third lens is f3, the focal length of the imaging optical lens is f, and the third lens 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, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied formula:

0.37≤f3/f≤1.49; 0.10≤(R5+R6)/(R5-R6)≤0.62; 0.06≤d5/TTL≤0.19.

Preferably, the imaging optical lens satisfies the following relationship:

0.59≤f3/f≤1.19; 0.16≤(R5+R6)/(R5-R6)≤0.49; 0.09≤d5/TTL≤0.15.

Preferably, the image side surface of the fourth lens is concave on the paraxial; the focal length of the fourth lens is f4, the focal length of the imaging optical lens is f, and the radius of curvature of the object side surface of the fourth lens is R7, so The curvature radius of the image side surface of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

-9.37≤f4/f≤-1.43; 0.47≤(R7+R8)/(R7-R8)≤6.41; 0.02≤ d7/TTL≤0.11.

Preferably, the imaging optical lens satisfies the following relationship:

-5.86≤f4/f≤-1.79; 0.75≤(R7+R8)/(R7-R8)≤5.13; 0.03≤d7/TTL≤0.08.

Preferably, the focal length of the fifth lens is f5, the focal length of the imaging optical lens is f, the radius of curvature of the object side of the fifth lens is R9, and the radius of curvature of the image side of the fifth lens is R10, so The on-axis thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

-9.89≤f5/f≤5.58; -3.13≤(R9+R10)/(R9-R10)≤2.14; 0.04≤d9/TTL≤0.16.

Preferably, the imaging optical lens satisfies the following relationship:

-6.18≤f5/f≤4.47; -1.95≤(R9+R10)/(R9-R10)≤1.71; 0.06≤d9/TTL≤0.13.

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

-347.74≤f6/f≤1.12; -3.61≤(R11+R12)/(R11-R12)≤1.44; 0.02≤d11/TTL≤0.22.

Preferably, the imaging optical lens satisfies the following relationship:

-217.34≤f6/f≤0.90; -2.26≤(R11+R12)/(R11-R12)≤1.15; 0.03≤d11/TTL≤0.18.

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 seventh lens is f7, the focal length of the imaging optical lens is f, 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, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship:

-3.06≤f7/f≤229.58; 0.89≤(R13+R14)/(R13-R14)≤14.60; 0.04≤d13/TTL≤0.27.

Preferably, the imaging optical lens satisfies the following relationship:

-1.91≤f7/f≤183.67; 1.43≤(R13+R14)/(R13-R14)≤11.68; 0.07≤d13/TTL≤0.22.

Preferably, the total optical length TTL of the imaging optical lens is less than or equal to 7.32 mm.

Preferably, the total optical length TTL of the imaging optical lens is less than or equal to 6.98 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 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;

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

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

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

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

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

Detailed ways

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, the imaging optical lens, from the object side to the image side sequentially includes: a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture S1, The third lens L3 with positive refractive power, the fourth lens L4 with negative refractive power, the fifth lens L5, the sixth lens L6, and the 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 glass.

The maximum angle of view of the imaging optical lens 10 is defined as FOV, which satisfies the following relationship: 100.00°≤FOV≤135.00°. Within the range of the maximum angle of view of the imaging optical lens 10 that satisfies the relational formula, ultra-wide-angle imaging can be achieved, and user experience can be improved.

Define the on-axis thickness of the first lens L1 as d1, the on-axis thickness of the third lens L3 as d5, and the on-axis thickness of the second lens L2 as d3, satisfying the following relationship: 2.50≤(d1+ d5)/d3≤4.00. It defines the ratio of the sum of the on-axis thickness of the first lens L1 and the third lens L3 to the on-axis thickness of the second lens L2. Within the range, the thickness of the first three lenses is reasonably controlled, which is more conducive to the processing of the lens and improves Product yield rate and cost reduction.

Define the Abbe number of the first lens L1 as v1, and the Abbe number of the seventh lens L7 as v7, satisfying the following relationship: 10.00≤v1-v7≤30.00. The difference between the dispersion coefficients of the first lens L1 and the seventh lens L7 is specified. Within the range, the dispersion of the imaging optical lens can be effectively corrected, the imaging definition can be improved, the real color of the object can be closer, and the imaging quality can be improved.

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 to have a high Performance, and meet the design requirements of low TTL.

In this embodiment, the object side surface of the first lens L1 is concave on the paraxial axis, and the image side surface of the first lens L1 is concave on the paraxial axis.

The focal length of the first lens L1 is defined as f1, the focal length of the imaging optical lens 10 is f, and the following relationship is satisfied: -4.47≤f1/f≤-1.09. 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, -2.79≤f1/f≤-1.37.

Define the curvature radius of the object side surface of the first lens L1 as R1, and the curvature radius of the image side surface of the first lens L1 as R2, and satisfy the following relationship: -0.10≤(R1+R2)/(R1-R2)≤ 1.04. The shape of the first lens L1 is specified, and within the scope of the conditional formula, the shape of the first lens L1 is reasonably controlled so that the first lens L1 can effectively correct the spherical aberration of the system. Preferably, -0.06≤(R1+R2)/(R1-R2)≤0.84.

The total optical length of the camera optical lens 10 is defined as TTL, and the following relationship is satisfied: 0.03≤d1/TTL≤0.17. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.05≤d1/TTL≤0.14.

In this embodiment, the object side of the second lens is convex on the paraxial axis, and the image side of the second lens is concave on the paraxial axis.

The focal length of the second lens L2 is defined as f2, the focal length of the imaging optical lens 10 is f, and the following relationship is satisfied: 3.38≤f2/f≤33.57. The ratio of the focal length f2 of the second lens L2 to the focal length f of the imaging optical lens 10 is specified. Within the range of the conditional expression, 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, 5.42≤f2/f≤26.86.

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, and the following relationship is satisfied: -552.14≤(R3+R4)/(R3-R4)≤28.81 . The shape of the second lens L2 is specified. Within the scope of the conditional expression, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, -345.09≤(R3+R4)/(R3-R4)≤23.04.

The total optical length of the imaging optical lens 10 is TTL, and satisfies the following relationship: 0.02≤d3/TTL≤0.12. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.04≤d3/TTL≤0.09.

In this embodiment, the object side surface of the third lens L3 is convex on the paraxial axis, and the image side surface thereof is convex on the paraxial axis.

The focal length of the third lens is defined as f3, the focal length of the imaging optical lens is f, and the following relationship is satisfied: 0.37≤f3/f≤1.49. The ratio of the focal length f3 of the third lens L3 to the focal length f of the imaging optical lens 10 is specified. Within the scope of the conditional expression, the system has better imaging quality and lower sensitivity through a reasonable distribution of optical power. Preferably, 0.59≤f3/f≤1.19.

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, and the following relationship is satisfied: 0.10≤(R5+R6)/(R5-R6)≤ 0.62. Within the range of the conditional expression, the shape of the third lens L3 can be effectively controlled, which is beneficial to the molding of the third lens L3, and avoids the formation of defects and stress caused by the excessive surface curvature of the third lens L3. Preferably, 0.16≤(R5+R6)/(R5-R6)≤0.49.

The axial thickness of the third lens L3 is d5, the total optical length of the imaging optical lens 10 is TTL, and the following relationship is satisfied: 0.06≦d5/TTL≦0.19. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.09≤d5/TTL≤0.15.

In this embodiment, the image side surface of the fourth lens L4 is concave on the paraxial axis.

The focal length of the fourth lens L4 is defined as f4, the focal length of the imaging optical lens 10 is f, and the following relationship is satisfied: -9.37≤f4/f≤-1.43, and the focal length f4 of the fourth lens L4 is defined as The ratio of the focal length f of the imaging optical lens 10 is within the range of the conditional formula, through a reasonable distribution of the optical power, the system has better imaging quality and lower sensitivity, which is helpful to improve the performance of the optical system. Preferably, -5.86≤f4/f≤-1.79.

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, and the following relationship is satisfied: 0.47≤(R7+R8)/(R7-R8)≤6.41. The shape of the fourth lens L4 is specified. Within the scope of the conditional expression, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, 0.75≤(R7+R8)/(R7-R8)≤5.13.

The axial thickness of the fourth lens L4 is d7, the total optical length of the imaging optical lens 10 is TTL, and the following relationship is satisfied: 0.02≦d7/TTL≦0.11. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.03≤d7/TTL≤0.08.

In this embodiment, the focal length of the fifth lens L5 is defined as f5, and the focal length of the imaging optical lens 10 is defined as f, and the following relationship is satisfied: -9.89≤f5/f≤5.58. The ratio of the focal length f5 of the fifth lens L5 to the focal length f of the imaging optical lens 10 is specified. Within the scope of the conditional expression, the limitation of the fifth lens L5 can effectively make the light angle of the imaging optical lens 10 smooth and reduce tolerance sensitivity . Preferably, -6.18≤f5/f≤4.47.

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, and the following relationship is satisfied: -3.13≤(R9+R10)/(R9-R10)≤2.14 . The shape of the fifth lens L5 is specified. 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. Preferably, -1.95≤(R9+R10)/(R9-R10)≤1.71.

The axial thickness of the fifth lens L5 is d9, the total optical length of the imaging optical lens 10 is TTL, and the following relationship is satisfied: 0.04≦d9/TTL≦0.16. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.06≤d9/TTL≤0.13.

In this embodiment, the focal length of the sixth lens L6 is defined as f6, and the focal length of the imaging optical lens 10 is defined as f, and the following relationship is satisfied: -347.74≤f6/f≤1.12. The ratio of the focal length f6 of the sixth lens L6 to the focal length f of the imaging optical lens 10 is specified. Within the scope of the conditional expression, the system has better imaging quality and lower sensitivity through a reasonable distribution of optical power. Preferably, -217.34≤f6/f≤0.90.

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: -3.61≤(R11+R12)/(R11-R12)≤1.44. What is specified is the shape of the sixth lens L6. Within the scope of the conditional formula, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, -2.26≤(R11+R12)/(R11-R12)≤1.15.

The axial 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: 0.02≦d11/TTL≦0.22. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.03≤d11/TTL≤0.18.

In this embodiment, the object side surface of the seventh lens L7 is convex on the paraxial axis, and the image side surface is concave on the paraxial axis.

The focal length of the seventh lens L7 is defined as f7, and the focal length of the imaging optical lens 10 is defined as f, and the following relationship is satisfied: -3.06≤f7/f≤229.58. The ratio of the focal length f7 of the seventh lens L7 to the focal length f of the imaging optical lens 10 is specified. Within the scope of the conditional expression, the system has better imaging quality and lower sensitivity through a reasonable distribution of optical power. Preferably, -1.91≤f7/f≤183.67.

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: 0.89≤(R13+R14)/(R13-R14)≤14.60. The shape of the seventh lens L7 is specified. Within the scope of the conditional expression, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, 1.43≤(R13+R14)/(R13-R14)≤11.68.

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: 0.04≦d13/TTL≦0.27. Within the scope of the conditional formula, it is beneficial to achieve ultra-thinness. Preferably, 0.07≤d13/TTL≤0.22.

In this embodiment, it is defined that the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.32 mm. Conducive to ultra-thin. Preferably, the total optical length TTL of the imaging optical lens 10 is less than or equal to 6.98 mm.

In this embodiment, it is defined that the aperture F number of the imaging optical lens 10 is less than or equal to 2.88. It is conducive to achieving a large aperture and making the imaging performance good. 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 invention will be described below with an example. The symbols described in each example are as follows. The unit of focal length, distance on axis, radius of curvature, thickness on axis, position of inflection point, and position of stagnation point is mm.

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

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

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 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 are the aspheric coefficients.

IH: Image height

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

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

Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 of 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 P1R1 1 0.345 0 P1R2 1 1.095 0 P2R1 1 0.915 0 P2R2 0 0 0 P3R1 1 0.645 0 P3R2 0 0 0 P4R1 0 0 0 P4R2 2 0.315 0.875 P5R1 2 0.605 1.155 P5R2 0 0 0 P6R1 1 0.345 0 P6R2 1 1.415 0 G7R1 2 0.405 1.715 G7R2 1 0.605 0

【Table 4】

To Number of stationary points Stagnation position 1 Stagnation position 2 P1R1 1 0.635 0 P1R2 0 0 0 P2R1 0 0 0 P2R2 0 0 0 P3R1 0 0 0 P3R2 0 0 0 P4R1 0 0 0 P4R2 2 0.575 1.055 P5R1 2 1.065 1.205 P5R2 0 0 0 P6R1 1 0.595 0 P6R2 0 0 0 G7R1 1 0.745 0 G7R2 1 1.745 0

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 21 shows the values corresponding to various values in each of Examples 1, 2, 3, 4, and 5 and the parameters that have been specified in the conditional expressions.

As shown in Table 21, the first embodiment satisfies various conditional expressions.

In this embodiment, the imaging optical lens 10 has an entrance pupil diameter of 1.291 mm, a full field of view image height of 3.25 mm, a maximum field of view angle of 100.12 °, wide-angle, ultra-thin, and its on-axis and off-axis color images The difference 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 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】

To Number of recurve points Recurve point position 1 Recurve point position 2 P1R1 2 0.285 1.675 P1R2 0 0 0 P2R1 2 0.745 0.895 P2R2 0 0 0 P3R1 1 0.425 0 P3R2 0 0 0 P4R1 1 0.425 0 P4R2 0 0 0 P5R1 1 1.185 0 P5R2 0 0 0 P6R1 1 1.365 0 P6R2 2 0.615 1.495 G7R1 2 0.565 1.615 G7R2 1 0.765 0

【Table 8】

To Number of stationary points Stagnation position 1 P1R1 1 0.505 P1R2 0 0 P2R1 0 0 P2R2 0 0 P3R1 0 0 P3R2 0 0 P4R1 1 0.825 P4R2 0 0 P5R1 0 0 P5R2 0 0 P6R1 0 0 P6R2 1 0.875 G7R1 1 1.015 G7R2 1 1.625

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 21, the second embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens 20 is 1.011mm, the full field of view image height is 3.25mm, the maximum field of view is 108.29°, wide-angle, ultra-thin, and its on-axis and off-axis color images The difference 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 design data of the imaging optical lens 30 according to the third embodiment of the present invention.

【Table 9】

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

【Table 10】

Table 11 and Table 12 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 30 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 1 0.355 0 0 P1R2 1 1.075 0 0 P2R1 1 0.935 0 0 P2R2 0 0 0 0 P3R1 1 0.655 0 0 P3R2 0 To 0 0 P4R1 1 0.185 0 0 P4R2 3 0.395 0.925 1.245 P5R1 2 0.565 1.265 0 P5R2 0 0 0 0 P6R1 2 0.185 1.425 0 P6R2 1 1.385 0 0 G7R1 2 0.445 1.695 0 G7R2 2 0.605 2.625 0

【Table 12】

To Number of stationary points Stagnation position 1 P1R1 1 0.635 P1R2 0 0 P2R1 0 0 P2R2 0 0 P3R1 0 0 P3R2 0 0 P4R1 1 0.325 P4R2 0 0 P5R1 1 0.995 P5R2 0 0 P6R1 1 0.315 P6R2 0 0 G7R1 1 0.825 G7R2 1 1.685

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 21 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 30 is 1.213mm, the full field of view image height is 3.25mm, the maximum field of view is 114.03°, wide-angle, ultra-thin, and its on-axis and off-axis color images The difference is 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 and Table 14 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

【Table 13】

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

【Table 14】

Table 15 and Table 16 show the inflection point and stagnation point design data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

【Table 15】

To Number of recurve points Recurve point position 1 Recurve point position 2 Recurve point position 3 P1R1 2 0.325 1.445 0 P1R2 1 1.105 0 0 P2R1 0 0 0 0 P2R2 0 0 0 0 P3R1 1 0.475 0 0 P3R2 0 0 0 0 P4R1 1 0.395 0 0 P4R2 1 1.125 0 0 P5R1 2 0.285 1.165 0 P5R2 1 1.015 0 0 P6R1 0 0 0 0 P6R2 3 0.045 0.535 1.465 G7R1 2 0.425 1.585 0 G7R2 1 0.715 0 0

【Table 16】

To Number of stationary points Stagnation position 1 Stagnation position 2 P1R1 1 0.575 0 P1R2 0 0 0 P2R1 0 0 0 P2R2 0 0 0 P3R1 0 0 0 P3R2 0 0 0 P4R1 1 0.745 0 P4R2 0 0 0 P5R1 1 0.545 0 P5R2 0 0 0 P6R1 0 0 0 P6R2 2 0.075 0.705

G7R1 1 0.715 0 G7R2 1 1.575 0

15 and 16 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with 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 21 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 40 is 1.089mm, the full-field image height is 3.25mm, the maximum field angle is 114.26°, wide-angle, ultra-thin, and its on-axis and off-axis color images The difference is fully corrected and has excellent optical characteristics.

(Fifth Embodiment)

The fifth 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 17 and Table 18 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.

【Table 17】

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

【Table 18】

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

【Table 19】

To Number of recurve points Recurve point position 1 Recurve point position 2 Recurve point position 3 P1R1 1 0.355 0 0 P1R2 1 1.265 0 0 P2R1 1 0.795 0 0 P2R2 0 0 0 0 P3R1 0 0 0 0 P3R2 0 0 0 0 P4R1 1 0.245 0 0 P4R2 3 0.475 1.015 1.235 P5R1 2 0.525 1.285 0 P5R2 1 0.205 0 0 P6R1 1 0.285 0 0 P6R2 1 1.375 0 0 G7R1 2 0.425 1.705 0 G7R2 2 0.595 2.615 0

【Table 20】

To Number of stationary points Stagnation position 1 P1R1 1 0.635 P1R2 0 0 P2R1 0 0 P2R2 0 0 P3R1 0 0 P3R2 0 0 P4R1 1 0.445 P4R2 0 0 P5R1 1 0.935

P5R2 1 0.355 P6R1 1 0.485 P6R2 0 0 G7R1 1 0.765 G7R2 1 1.565

19 and 20 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 555 nm and 470 nm passes through the imaging optical lens 50 of the fifth embodiment. FIG. 20 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 50 of the fifth embodiment.

The following Table 21 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 imaging optical lens 50 has an entrance pupil diameter of 1.094mm, a full field of view image height of 3.25mm, a maximum field of view angle of 134.77°, wide-angle, ultra-thin, and its on-axis and off-axis color images The difference is fully corrected and has excellent optical characteristics.

【Table 21】

Parameters and conditions Example 1 Example 2 Example 3 Example 4 Example 5 f 2.737 2.830 2.425 2.876 2.320 f1 -6.112 -4.853 -4.489 -4.711 -3.954 f2 61.264 19.158 24.360 29.198 23.635 f3 2.331 2.195 2.330 2.133 2.300 f4 -6.702 -6.071 -9.625 -6.742 -10.867 f5 -8.184 10.535 -11.989 4.665 -8.065 f6 1.713 -47.748 1.726 -500.000 1.738 f7 -2.473 433.126 -2.262 -4.395 -2.134 f12 -5.866 -5.994 -4.931 -5.208 -4.540 Fno 2.12 2.80 2.00 2.64 2.12 FOV 100.12° 108.29° 114.03° 114.26° 134.77° (d1+d5)/d3 2.52 3.58 3.23 3.00 3.97 v1-v7 10.17 23.85 20.61 14.71 29.42

Fno is the aperture F number of the imaging 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 (19)

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, the fourth lens, the fifth lens, the sixth lens, and the seventh lens with negative refractive power; the maximum angle of view of the imaging optical lens is FOV, and the axial thickness of the first lens is d1, The axial thickness of the third lens is d5, the axial thickness of the second lens is d3, the Abbe number of the first lens is v1, and the Abbe number of the seventh lens is v7, which satisfies the following Relationship: 100.00°≤FOV≤135.00°, 2.50≤(d1+d5)/d3≤4.00, 10.00≤v1-v7≤30.00. The imaging optical lens of claim 1, wherein the object side surface of the first lens is concave on the paraxial axis, and the image side surface is concave on the paraxial axis; the focal length of the first lens is f1, and the camera The focal length of the optical lens is f, 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, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -4.47≤f1/f≤-1.09; -0.10≤(R1+R2)/(R1-R2)≤1.04; 0.03≤d1/TTL≤0.17. 4. The imaging optical lens of claim 2, wherein the imaging optical lens satisfies the following relationship: -2.79≤f1/f≤-1.37; -0.06≤(R1+R2)/(R1-R2)≤0.84; 0.05≤d1/TTL≤0.14. The imaging optical lens of claim 1, wherein the object side of the second lens is convex on the paraxial axis, and the image side of the second lens is concave on the paraxial; the focal length of the second lens is f2, and the camera The focal length of the optical lens is f, the radius of curvature of the object side of the second lens is R3, the radius of curvature of the image side of the second lens is R4, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 3.38≤f2/f≤33.57; -552.14≤(R3+R4)/(R3-R4)≤28.81; 0.02≤d3/TTL≤0.12. 4. The imaging optical lens of claim 4, wherein the imaging optical lens satisfies the following relationship: 5.42≤f2/f≤26.86; -345.09≤(R3+R4)/(R3-R4)≤23.04; 0.04≤d3/TTL≤0.09. 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 third lens is f3, the focal length of the imaging optical lens is f, the radius of curvature of the object side of the third lens is R5, and the radius of curvature of the image side of the third lens is R6. The total optical length of the camera optical lens is TTL and satisfies the following relationship: 0.37≤f3/f≤1.49; 0.10≤(R5+R6)/(R5-R6)≤0.62; 0.06≤d5/TTL≤0.19. 7. The imaging optical lens of claim 6, wherein the imaging optical lens satisfies the following relationship: 0.59≤f3/f≤1.19; 0.16≤(R5+R6)/(R5-R6)≤0.49; 0.09≤d5/TTL≤0.15. The imaging optical lens of claim 1, wherein the image side surface of the fourth lens is concave on the paraxial; the focal length of the fourth lens is f4, the focal length of the imaging optical lens is f, and the 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 on-axis thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and satisfies the following Relationship: -9.37≤f4/f≤-1.43; 0.47≤(R7+R8)/(R7-R8)≤6.41; 0.02≤d7/TTL≤0.11. 8. The imaging optical lens of claim 8, wherein the imaging optical lens satisfies the following relationship: -5.86≤f4/f≤-1.79; 0.75≤(R7+R8)/(R7-R8)≤5.13; 0.03≤d7/TTL≤0.08. The imaging optical lens of claim 1, wherein the focal length of the fifth lens is f5, the focal length of the imaging optical lens is f, the radius of curvature of the object side surface of the fifth lens is R9, and the The radius of curvature of the image side surface of the fifth lens is R10, the on-axis thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -9.89≤f5/f≤5.58; -3.13≤(R9+R10)/(R9-R10)≤2.14; 0.04≤d9/TTL≤0.16. 10. The imaging optical lens of claim 10, wherein the imaging optical lens satisfies the following relationship: -6.18≤f5/f≤4.47; -1.95≤(R9+R10)/(R9-R10)≤1.71; 0.06≤d9/TTL≤0.13. The imaging optical lens of claim 1, wherein the focal length of the sixth lens is f6, the focal length of the imaging optical lens is f, the radius of curvature of the object side of the sixth lens is R11, and the The radius of curvature of the image side surface of the sixth lens is R12, the on-axis thickness of the sixth lens is d11, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: -347.74≤f6/f≤1.12; -3.61≤(R11+R12)/(R11-R12)≤1.44; 0.02≤d11/TTL≤0.22. The imaging optical lens of claim 12, wherein the imaging optical lens satisfies the following relationship: -217.34≤f6/f≤0.90; -2.26≤(R11+R12)/(R11-R12)≤1.15; 0.03≤d11/TTL≤0.18. 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 seventh lens is f7, the focal length of the imaging optical lens is f, 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, and the total optical length of the imaging optical lens is TTL, which satisfies the following relationship: -3.06≤f7/f≤229.58; 0.89≤(R13+R14)/(R13-R14)≤14.60; 0.04≤d13/TTL≤0.27. The imaging optical lens of claim 14, wherein the imaging optical lens satisfies the following relational expression: -1.91≤f7/f≤183.67; 1.43≤(R13+R14)/(R13-R14)≤11.68; 0.07≤d13/TTL≤0.22. The imaging optical lens of claim 1, wherein the total optical length TTL of the imaging optical lens is less than or equal to 7.32 millimeters. The imaging optical lens of claim 16, wherein the total optical length TTL of the imaging optical lens is less than or equal to 6.98 millimeters. 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. 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.

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