CN111025566B

CN111025566B - Camera optics

Info

Publication number: CN111025566B
Application number: CN201911367107.9A
Authority: CN
Inventors: 寺岡弘之; 张磊; 崔元善
Original assignee: Chengrui Optics Changzhou Co Ltd
Current assignee: Chengrui Optics Changzhou Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2021-05-04
Anticipated expiration: 2039-12-26
Also published as: CN111025566A

Abstract

The invention relates to the field of optical lenses, and discloses an imaging optical lens. The imaging optical lens comprises, in order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a first lens Six lenses, and a seventh lens; and satisfy the following relationship: 100.00°≤FOV≤135.00°; ‑5.00≤f1/f≤‑1.00; 2.00≤f3/f≤20.00; 1.00≤R7/R8≤8.00;‑10.00 ≤R9/R10≤‑3.00. The imaging optical lens can obtain low TTL while obtaining high imaging performance.

Description

Image pickup optical lens

Technical Field

The present invention relates to the field of optical lenses, and more particularly, to an imaging optical lens suitable for portable terminal devices such as smart phones and digital cameras, and imaging apparatuses such as monitors and PC lenses.

Background

In recent years, with the rise of smart phones, the demand of miniaturized camera lenses is increasing, and the photosensitive devices of general camera lenses are not limited to two types, namely, a Charge Coupled Device (CCD) or a Complementary Metal-oxide semiconductor (CMOS) Sensor, and due to the advanced semiconductor manufacturing process technology, the pixel size of the photosensitive devices is reduced, and in addition, the current electronic products are developed with a good function, a light weight, a small size and a light weight, so that the miniaturized camera lenses with good imaging quality are the mainstream in the current market. In order to obtain better imaging quality, the lens mounted on the mobile phone camera conventionally adopts a three-piece or four-piece lens structure. Moreover, with the development of technology and the increase of diversified demands of users, under the condition that the pixel area of the photosensitive device is continuously reduced and the requirement of the system on the imaging quality is continuously improved, five-piece, six-piece and seven-piece lens structures gradually appear in the design of the lens. A wide-angle imaging lens having excellent optical characteristics, being ultra-thin and having sufficient chromatic aberration correction is in demand.

Disclosure of Invention

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

To solve the above-mentioned problems, an embodiment of the present invention provides an imaging optical lens, in order from an object side to an image side, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the first lens element with negative refractive power, the second lens element with negative refractive power, the third lens element with positive refractive power, and the fourth lens element with positive refractive power; the imaging optical lens has a maximum field angle FOV, a focal length f1, a focal length f3, a radius of curvature R7, a radius of curvature R8, a radius of curvature R9, and a radius of curvature R10, and satisfies the following relationships: FOV is more than or equal to 100.00 degrees and less than or equal to 135.00 degrees; f1/f is more than or equal to minus 5.00 and less than or equal to minus 1.00; f3/f is more than or equal to 2.00 and less than or equal to 20.00; R7/R8 is more than or equal to 1.00 and less than or equal to 8.00; R9/R10 is more than or equal to-10.00 and less than or equal to-3.00.

Preferably, the object-side surface of the first lens element is convex in the paraxial region, and the image-side surface thereof is concave in the paraxial region; 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, the on-axis thickness of the first lens is d1, the total optical length of the shooting optical lens is TTL, and the following relational expression is satisfied: (R1+ R2)/(R1-R2) is not more than 0.50 and not more than 5.03; d1/TTL is more than or equal to 0.01 and less than or equal to 0.12.

Preferably, the imaging optical lens satisfies the following relational expression: (R1+ R2)/(R1-R2) is not more than 0.80 and not more than 4.02; d1/TTL is more than or equal to 0.02 and less than or equal to 0.09.

Preferably, the image-side surface of the second lens is concave at the paraxial region; the focal length of the second lens is f2, the curvature radius of the object-side surface of the second lens is R3, the curvature radius of the image-side surface of the second lens is R4, the on-axis thickness of the second lens is d3, the total optical length of the photographic optical lens is TTL, and the following relational expression is satisfied: f2/f is not less than-3.88 and is not less than-2278.70; -0.22 ≤ (R3+ R4)/(R3-R4) ≤ 42.08; d3/TTL is more than or equal to 0.03 and less than or equal to 0.15.

Preferably, the imaging optical lens satisfies the following relational expression: f2/f is not less than-4.85 and is not less than-1736.69; -0.14 ≤ (R3+ R4)/(R3-R4) ≤ 33.66; d3/TTL is more than or equal to 0.05 and less than or equal to 0.12.

Preferably, the object-side surface of the third lens element is convex in the paraxial region, and the image-side surface thereof is concave in the paraxial region; the on-axis thickness of the third lens is d5, the curvature radius of the object-side surface of the third lens is R5, the curvature radius of the image-side surface of the third lens is R6, the total optical length of the photographic optical lens is TTL, and the following relational expression is satisfied: -14.47 ≤ (R5+ R6)/(R5-R6) 75.77; d5/TTL is more than or equal to 0.01 and less than or equal to 0.07.

Preferably, the imaging optical lens satisfies the following relational expression: -9.04 ≤ (R5+ R6)/(R5-R6) 60.62; d5/TTL is more than or equal to 0.02 and less than or equal to 0.06.

Preferably, the object-side surface of the fourth lens element is concave in the paraxial region, and the image-side surface thereof is convex in the paraxial region; the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, the total optical length of the image pickup optical lens is TTL, and the following relational expression is satisfied: f4/f is more than or equal to 0.63 and less than or equal to 18.64; the ratio of (R7+ R8)/(R7-R8) is not more than 0.64 and not more than 16.50; d7/TTL is more than or equal to 0.03 and less than or equal to 0.12.

Preferably, the imaging optical lens satisfies the following relational expression: f4/f is more than or equal to 1.01 and less than or equal to 14.91; 1.03-13.20 percent (R7+ R8)/(R7-R8); d7/TTL is more than or equal to 0.05 and less than or equal to 0.10.

Preferably, the object-side surface of the fifth lens element is concave in the paraxial region, and the image-side surface thereof is concave in the paraxial region; the focal length of the fifth lens is f5, the on-axis thickness of the fifth lens is d9, the total optical length of the photographic optical lens is TTL, and the following relational expression of-17.23 and f5/f is respectively less than or equal to-1.11 is satisfied; (R9+ R10)/(R9-R10) is not more than 0.25 and not more than 1.23; d9/TTL is more than or equal to 0.02 and less than or equal to 0.21.

The imaging optical lens satisfies the following relational expression: f5/f is more than or equal to-10.77 and less than or equal to-1.39, and (R9+ R10)/(R9-R10) is more than or equal to 0.98; d9/TTL is more than or equal to 0.03 and less than or equal to 0.17.

Preferably, the image-side surface of the sixth lens element is convex at the paraxial region;

preferably, the focal length of the sixth lens element is f6, the radius of curvature of the object-side surface of the sixth lens element is R11, the radius of curvature of the image-side surface of the sixth lens element is R12, the on-axis thickness of the sixth lens element is d11, and the total optical length of the imaging optical lens system is TTL and satisfies the following relationships: f6/f is more than or equal to 0.22 and less than or equal to 1.20; (R11+ R12)/(R11-R12) is not more than 0.45 and not more than 2.05; d11/TTL is more than or equal to 0.06 and less than or equal to 0.25.

Preferably, the imaging optical lens satisfies the following relational expression: f6/f is more than or equal to 0.36 and less than or equal to 0.96; (R11+ R12)/(R11-R12) is not more than 0.71 and not more than 1.64; d11/TTL is more than or equal to 0.10 and less than or equal to 0.20.

Preferably, the object-side surface of the seventh lens element is convex in the paraxial region, and the image-side surface thereof is concave in the paraxial region; the focal length of the seventh lens element is f7, the curvature radius of the object-side surface of the seventh lens element is R13, the curvature radius of the image-side surface of the seventh lens element is R14, the on-axis thickness of the seventh lens element is d13, and the total optical length of the imaging optical lens assembly is TTL and satisfies the following relationship: f7/f is not less than-2.56 and not more than-0.37; (R13+ R14)/(R13-R14) is not more than 0.59 but not more than 3.61; d13/TTL is more than or equal to 0.02 and less than or equal to 0.15.

Preferably, the imaging optical lens satisfies the following relational expression: f7/f is not less than 1.60 and not more than-0.46; (R13+ R14)/(R13-R14) is not more than 0.95 and not more than 2.88; d13/TTL is more than or equal to 0.03 and less than or equal to 0.12.

Preferably, the total optical length TTL of the image pickup optical lens is less than or equal to 13.19 millimeters.

Preferably, the total optical length TTL of the image pickup optical lens is less than or equal to 12.59 millimeters.

Preferably, the F-number of the imaging optical lens is 2.88 or less.

Preferably, the number of the diaphragm F of the imaging optical lens is 2.83 or less.

The invention has the advantages that the optical camera lens has excellent optical characteristics, is ultrathin, has wide angle and can fully correct chromatic aberration, and is particularly suitable for mobile phone camera lens components and WEB camera lenses which are composed of high-pixel CCD, CMOS and other camera elements.

Drawings

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

FIG. 2 is a schematic axial aberration diagram of the imaging optical lens of FIG. 1;

fig. 3 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 1;

FIG. 4 is a schematic view of curvature of field and distortion of the imaging optical lens of FIG. 1;

fig. 5 is a schematic configuration diagram of an imaging optical lens according to a second embodiment of the present invention;

FIG. 6 is a schematic axial aberration diagram of the imaging optical lens of FIG. 5;

fig. 7 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 5;

FIG. 8 is a schematic view of curvature of field and distortion of the imaging optical lens of FIG. 5;

fig. 9 is a schematic configuration diagram of an imaging optical lens according to a third embodiment of the present invention;

fig. 10 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 9;

fig. 11 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 9;

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

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

fig. 14 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 13;

fig. 15 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 13;

fig. 16 is a schematic view of curvature of field and distortion of the imaging optical lens shown in fig. 13.

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

fig. 18 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 17;

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

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

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.

(first embodiment)

Referring to the drawings, the present invention provides an image pickup optical lens 10. Fig. 1 shows an image pickup optical lens 10 according to a first embodiment of the present invention, and the image pickup optical lens 10 includes seven lenses. Specifically, the imaging optical lens 10, in order from an object side to an image side, includes: a first lens L1, a second lens L2, a third lens L3, a stop S1, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter (filter) GF may be disposed on the image side of the seventh lens element L7.

The first lens element L1 with negative refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with positive refractive power and the fourth lens element L4 with positive refractive power.

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

The maximum field angle of the imaging optical lens 10 is defined as FOV, and the following relation is satisfied: the FOV is more than or equal to 100.00 degrees and less than or equal to 135.00 degrees, the field angle of the camera optical lens 10 is specified, when the camera is in the range, ultra-wide-angle camera shooting can be realized, and the user experience is improved.

Defining the focal length f of the entire image pickup optical lens 10 and the focal length f1 of the first lens L1, the following relations are satisfied: -5.00. ltoreq. f 1/f. ltoreq. 1.00, specifying the negative refractive power of the first lens element L1. If the negative refractive power exceeds the upper limit value, the lens is made thinner, but the negative refractive power of the first lens element L1 is too strong, which makes it difficult to correct aberrations and the like, and makes it difficult to make the lens wider. On the contrary, if the refractive power exceeds the lower limit predetermined value, the negative refractive power of the first lens element becomes too weak, and the lens barrel is difficult to be made thinner.

Defining the focal length f of the entire image pickup optical lens 10 and the focal length f3 of the third lens L3, the following relations are satisfied: 2.00 ≦ f3/f ≦ 20.00, and the system has better imaging quality and lower sensitivity through reasonable distribution of focal power.

The radius of curvature R7 of the object-side surface of the fourth lens L4 and the radius of curvature R8 of the image-side surface of the fourth lens L4 are defined to satisfy the following relations: R7/R8 is 1.00-8.00, and the shape of the fourth lens L4 is defined, so that the problem of chromatic aberration on the axis can be corrected favorably as the lens is in a range of ultra-thin wide angle.

The radius of curvature R9 of the object-side surface of the fifth lens L5 and the radius of curvature R10 of the image-side surface of the fifth lens L5 are defined to satisfy the following relations: R9/R10 is not less than-3.00 at-10.00. ltoreq. the shape of the fifth lens L5 is defined, and when the shape is within the range, the problem of chromatic aberration on the axis is favorably corrected as the lens is developed to be ultra-thin and wide-angle.

When the focal length of the image pickup optical lens 10, the focal lengths of the lenses, the on-axis thickness, and the curvature radius of the lens according to the present invention satisfy the above-mentioned relational expressions, the image pickup optical lens 10 can have high performance and meet the design requirements of low TTL.

In this embodiment, the object-side surface of the first lens element L1 is convex in the paraxial region, and the image-side surface thereof is concave in the paraxial region.

The curvature radius R1 of the object side surface of the first lens L1 and the curvature radius R2 of the image side surface of the first lens L1 satisfy the following relations: 0.50 ≦ (R1+ R2)/(R1-R2) ≦ 5.03, and the shape of the first lens is appropriately controlled so that the first lens can effectively correct the system spherical aberration. Preferably, 0.80 ≦ (R1+ R2)/(R1-R2). ltoreq.4.02.

The on-axis thickness of the first lens L1 is d1, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d1/TTL is more than or equal to 0.01 and less than or equal to 0.12, and ultra-thinning is facilitated. Preferably, 0.02. ltoreq. d 1/TTL. ltoreq.0.09.

In the present embodiment, the image-side surface of the second lens L2 is concave in the paraxial region.

Defining the focal length of the second lens L2 as f2, the following relation is satisfied: 2278.70 f2/f 3.88, which is advantageous for correcting the aberration of the optical system by controlling the negative power of the second lens L2 in a reasonable range. Preferably, -1736.69. ltoreq. f 2/f. ltoreq-4.85.

The curvature radius R3 of the object side surface of the second lens L2 and the curvature radius R4 of the image side surface of the second lens L2 are defined, and the following relations are satisfied: the shape of the second lens L2 is defined to be (R3+ R4)/(R3-R4) or less than 42.08 at 0.22 or less, and the problem of chromatic aberration on the axis can be corrected favorably as the lens is brought to an ultra-thin wide angle within the range. Preferably, -0.14 ≦ (R3+ R4)/(R3-R4) ≦ 33.66.

The on-axis thickness of the second lens L2 is d3, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d3/TTL is more than or equal to 0.03 and less than or equal to 0.15, and ultra-thinning is facilitated. Preferably, 0.05. ltoreq. d 3/TTL. ltoreq.0.12.

In this embodiment, the object-side surface of the third lens element L3 is convex at the paraxial region, and the image-side surface thereof is concave at the paraxial region.

The curvature radius R5 of the object side surface of the third lens L3 and the curvature radius R6 of the image side surface of the third lens L3 satisfy the following relations: 14.47 ≦ (R5+ R6)/(R5-R6) ≦ 75.77, which can effectively control the shape of the third lens L3, is beneficial to the formation of the third lens L3, and can alleviate the deflection degree of the light passing through the lens within the range specified by the conditional expression, and effectively reduce the aberration. Preferably, -9.04 ≦ (R5+ R6)/(R5-R6) ≦ 60.62.

The on-axis thickness of the third lens L3 is d5, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d5/TTL is more than or equal to 0.01 and less than or equal to 0.07, and ultra-thinning is facilitated. Preferably, 0.02. ltoreq. d 5/TTL. ltoreq.0.06.

In this embodiment, the object-side surface of the fourth lens element L4 is concave at the paraxial region, and the image-side surface thereof is convex at the paraxial region.

The focal length of the entire image pickup optical lens 10 is f, and the focal length of the fourth lens L4 is f4, and the following relationships are satisfied: f4/f is more than or equal to 0.63 and less than or equal to 18.64, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power. Preferably, 1.01. ltoreq. f 4/f. ltoreq.14.91.

The curvature radius R7 of the object side surface of the fourth lens L4 and the curvature radius R8 of the image side surface of the fourth lens L4 satisfy the following relations: 0.64 ≦ (R7+ R8)/(R7-R8) ≦ 16.50, and the shape of the fourth lens L4 is specified, and when the shape is within the range, problems such as aberration of the off-axis angle are easily corrected with the development of an ultra-thin wide angle. Preferably, 1.03 ≦ (R7+ R8)/(R7-R8) ≦ 13.20.

The on-axis thickness of the fourth lens L4 is d7, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d7/TTL is more than or equal to 0.03 and less than or equal to 0.12, and ultra-thinning is facilitated. Preferably, 0.05. ltoreq. d 7/TTL. ltoreq.0.10.

In the present embodiment, the object-side surface of the fifth lens element L5 is concave at the paraxial region, and the image-side surface is concave at the paraxial region.

The focal length of the entire image pickup optical lens 10 is f, and the focal length of the fifth lens L5 is f5, and the following relationships are satisfied: f5/f is less than or equal to-1.11, and the definition of the fifth lens L5 can effectively make the light angle of the camera lens smooth and reduce the tolerance sensitivity. Preferably-10.77. ltoreq. f 5/f. ltoreq-1.39.

The curvature radius R9 of the object side surface of the fifth lens L5 and the curvature radius R10 of the image side surface of the fifth lens L5 satisfy the following relations: the (R9+ R10)/(R9-R10) is not more than 0.25 and not more than 1.23, and the shape of the fifth lens L5 is defined, and when the shape is within the condition range, the problem of aberration of off-axis picture angle is favorably corrected along with the development of ultra-thin wide-angle. Preferably, 0.40 ≦ (R9+ R10)/(R9-R10). ltoreq.0.98.

The on-axis thickness of the fifth lens L5 is d9, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d9/TTL is more than or equal to 0.02 and less than or equal to 0.21, and ultra-thinning is facilitated. Preferably, 0.03. ltoreq. d 9/TTL. ltoreq.0.17.

In the present embodiment, the image-side surface of the sixth lens element L6 is convex in the paraxial region.

The focal length of the entire image pickup optical lens 10 is f, and the focal length of the sixth lens L6 is f6, and the following relationships are satisfied: f6/f is more than or equal to 0.22 and less than or equal to 1.20, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power. Preferably, 0.36. ltoreq. f 6/f. ltoreq.0.96.

The curvature radius R11 of the object side surface of the sixth lens L6 and the curvature radius R12 of the image side surface of the sixth lens L6 satisfy the following relations: the (R11+ R12)/(R11-R12) is not more than 0.45 and not more than 2.05, and the shape of the sixth lens L6 is defined, so that the problem of aberration of an off-axis picture angle is favorably corrected as the ultra-thin wide angle is developed within a condition range. Preferably, 0.71 ≦ (R11+ R12)/(R11-R12). ltoreq.1.64.

The on-axis thickness of the sixth lens L6 is d11, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d11/TTL is more than or equal to 0.06 and less than or equal to 0.25, and ultra-thinning is facilitated. Preferably, 0.10. ltoreq. d 11/TTL. ltoreq.0.20.

In this embodiment, the object-side surface of the seventh lens element L7 is convex at the paraxial region, and the image-side surface thereof is concave at the paraxial region.

The focal length of the entire image pickup optical lens 10 is f, and the focal length of the seventh lens L7 is f7, and the following relationships are satisfied: 2.56 ≦ f7/f ≦ -0.37, allowing better imaging quality and lower sensitivity of the system through reasonable distribution of optical power. Preferably, -1.60. ltoreq. f 7/f. ltoreq-0.46.

The curvature radius R13 of the object-side surface of the seventh lens L7 and the curvature radius R14 of the image-side surface of the seventh lens L7 satisfy the following relations: 0.59-3.61 (R13+ R14)/(R13-R14), wherein the shape of the seventh lens L7 is defined, and the problem of aberration of off-axis picture angle is favorably corrected as the ultra-thin wide angle is developed within the condition range. Preferably, 0.95 ≦ (R13+ R14)/(R13-R14). ltoreq.2.88.

The on-axis thickness of the seventh lens L7 is d13, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d13/TTL is more than or equal to 0.02 and less than or equal to 0.15, and ultra-thinning is facilitated. Preferably, 0.03. ltoreq. d 13/TTL. ltoreq.0.12.

In this embodiment, the total optical length TTL of the image pickup optical lens 10 is less than or equal to 13.19 mm, which is beneficial to achieving ultra-thinning. Preferably, the total optical length TTL of the image-taking optical lens 10 is less than or equal to 12.59 millimeters.

In the present embodiment, the number of apertures F of the imaging optical lens 10 is 2.88 or less. The large aperture is large, and the imaging performance is good. Preferably, the F-number of the imaging optical lens 10 is 2.83 or less.

With such a design, the total optical length TTL of the entire imaging optical lens 10 can be made as short as possible, and the characteristic of miniaturization can be maintained.

The image pickup optical lens 10 of the present invention will be explained below by way of example. The symbols described in the respective examples are as follows. The unit of focal length, on-axis distance, curvature radius, on-axis thickness, position of reverse curvature and position of stagnation point is mm.

TTL: the total optical length (on-axis distance from the object side surface of the first lens L1 to the image plane) in units of mm;

preferably, the object side surface and/or the image side surface of the lens may be further provided with an inflection point and/or a stagnation point to meet the requirement of high-quality imaging.

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

[ TABLE 1 ]

Wherein each symbol has the following meaning.

S1: an aperture;

FOV: the maximum field angle of the shooting optical lens is FOV;

r: the radius of curvature of the optical surface and the radius of curvature of the lens as the center;

r1: the radius of curvature of the object-side surface of the first lens L1;

r2: the radius of curvature of the image-side surface of the first lens L1;

r3: the radius of curvature of the object-side surface of the second lens L2;

r4: the radius of curvature of the image-side surface of the second lens L2;

r5: the radius of curvature of the object-side surface of the third lens L3;

r6: the radius of curvature of the image-side surface of the third lens L3;

r7: the radius of curvature of the object-side surface of the fourth lens L4;

r8: the radius of curvature of the image-side surface of the fourth lens L4;

r9: a radius of curvature of the object side surface of the fifth lens L5;

r10: a radius of curvature of the image-side surface of the fifth lens L5;

r11: a radius of curvature of the object side surface of the sixth lens L6;

r12: a radius of curvature of the image-side surface of the sixth lens L6;

r13: a radius of curvature of the object side surface of the seventh lens L7;

r14: a radius of curvature of the image-side surface of the seventh lens L7;

r15: 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: an on-axis thickness of the lenses and an on-axis distance between the lenses;

d 0: the on-axis distance of the stop S1 to the object-side surface of the first lens L1;

d 1: the on-axis thickness of the first lens L1;

d 2: the on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

d 3: the on-axis thickness of the second lens L2;

d 4: the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

d 5: the on-axis thickness of the third lens L3;

d 6: the on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

d 7: the on-axis thickness of the fourth lens L4;

d 8: an on-axis distance from an image-side surface of the fourth lens L4 to an object-side surface of the fifth lens L5;

d 9: the on-axis thickness of the fifth lens L5;

d 10: an on-axis distance from an image-side surface of the fifth lens L5 to an object-side surface of the sixth lens L6;

d 11: the on-axis thickness of the sixth lens L6;

d 12: an on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

d 13: the on-axis thickness of the seventh lens L7;

d 14: the on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the optical filter GF;

d 15: on-axis thickness of the optical filter GF;

d 16: the on-axis distance from the image side surface of the optical filter GF to the image surface;

nd: the refractive index of the d-line;

nd 1: the refractive index of the d-line of the first lens L1;

nd 2: the refractive index of the d-line of the second lens L2;

nd 3: the refractive index of the d-line of the third lens L3;

nd 4: the refractive index of the d-line of the fourth lens L4;

nd 5: the refractive index of the d-line of the fifth lens L5;

nd 6: the refractive index of the d-line of the sixth lens L6;

nd 7: 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: an Abbe number;

v 1: abbe number of the first lens L1;

v 2: abbe number of the second lens L2;

v 3: abbe number of the third lens L3;

v 4: abbe number of the fourth lens L4;

v 5: abbe number of the fifth lens L5;

v 6: abbe number of the sixth lens L6;

v 7: abbe number of the seventh lens L7;

vg: abbe number of the optical filter GF.

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

[ TABLE 2 ]

Wherein k is a conic coefficient, and A4, A6, A8, A10, A12, A14 and A16 are aspheric coefficients.

IH: image height

y＝(x²/R)/[1+{1-(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶ (1)

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

Tables 3 and 4 show the inflection point and stagnation point design data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention. P1R1 and P1R2 represent the object-side surface and the image-side surface of the first lens L1, P2R1 and P2R2 represent the object-side surface and the image-side surface of the second lens L2, P3R1 and P3R2 represent the object-side surface and the image-side surface of the third lens L3, P4R1 and P4R2 represent the object-side surface and the image-side surface of the fourth lens L4, P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5, P6R1 and P6R2 represent the object-side surface and the image-side surface of the sixth lens L6, and P7R1 and P7R2 represent the object-side surface and the image-side surface of the seventh lens L7, respectively. The "inflection point position" field correspondence data is a vertical distance from an inflection point set on each lens surface to the optical axis of the image pickup optical lens 10. The "stagnation point position" field corresponding data is the vertical distance from the stagnation point set on each lens surface to the optical axis of the imaging optical lens 10.

[ TABLE 3 ]

[ TABLE 4 ]

	Number of stagnation points	Location of stagnation 1	Location of stagnation 2
				P1R1	0
P1R2	0
				P2R1	1	2.115
P2R2	1	1.465
				P3R1	0
P3R2	0
				P4R1	0
P4R2	0
				P5R1	0
P5R2	0
				P6R1	2	0.345	1.335
P6R2	0
				P7R1	0
P7R2	1	1.975

Fig. 2 and 3 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 656nm, 588nm, and 486nm, respectively, after passing through the imaging optical lens 10 according to the first embodiment. Fig. 4 is a schematic view showing curvature of field and distortion of light having a wavelength of 588nm after passing through the imaging optical lens 10 according to the first embodiment, where S is curvature of field in the sagittal direction and T is curvature of field in the tangential direction in fig. 4.

Table 21 shown later shows values of the respective numerical values in examples 1, 2, 3, 4, and 5 corresponding to the parameters specified in the conditional expressions.

As shown in table 21, the first embodiment satisfies each conditional expression.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 1.286mm, a full field height of 3.70mm, a maximum field angle of 101.00 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.

(second embodiment)

The second embodiment is basically the same as the first embodiment, the same reference numerals as in the first embodiment, and only different points will be described below.

Tables 5 and 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[ TABLE 5 ]

Table 6 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[ TABLE 6 ]

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

[ TABLE 7 ]

	Number of points of inflection	Position of reverse curvature 1	Position of reverse curvature 2	Position of reverse curvature 3
					P1R1	0
P1R2	2	2.605	2.705
					P2R1	2	1.415	2.155
P2R2	2	0.795	1.775
					P3R1	1	0.695
P3R2	1	0.915
					P4R1	0
P4R2	0
					P5R1	1	0.955
P5R2	2	0.275	1.165
					P6R1	1	1.355
P6R2	3	1.395	1.645	1.925
					P7R1	2	0.645	2.585
P7R2	2	0.845	3.015

[ TABLE 8 ]

Fig. 6 and 7 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 656nm, 588nm, and 486nm, respectively, after passing through the imaging optical lens 20 according to the second embodiment. Fig. 8 is a schematic view showing curvature of field and distortion of light having a wavelength of 588nm after passing through the imaging optical lens 20 according to the second embodiment.

As shown in table 21, the second embodiment satisfies each conditional expression.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 1.134mm, a full field image height of 3.70mm, a maximum field angle of 116.00 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.

(third embodiment)

The third embodiment is basically the same as the first embodiment, the same reference numerals as in the first embodiment, and only different points will be described below.

Tables 9 and 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[ TABLE 9 ]

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

[ TABLE 10 ]

Tables 11 and 12 show the inflection points and the stagnation point design data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[ TABLE 11 ]

[ TABLE 12 ]

	Number of stagnation points	Location of stagnation 1	Location of stagnation 2
				P1R1	0
P1R2	0
				P2R1	1	1.685
P2R2	1	0.745
				P3R1	0
P3R2	0
				P4R1	0
P4R2	0
				P5R1	0
P5R2	2	0.645	1.285
				P6R1	0
P6R2	0
				P7R1	1	1.655
P7R2	1	2.865

Fig. 10 and 11 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 656nm, 588nm, and 486nm passing through the imaging optical lens 30 according to the third embodiment. Fig. 12 is a schematic view showing curvature of field and distortion of light having a wavelength of 588nm after passing through the imaging optical lens 30 according to the third embodiment.

As shown in table 21, the third embodiment satisfies each conditional expression.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 0.951mm, a full field image height of 3.70mm, a maximum field angle of 133.02 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.

(fourth embodiment)

The fourth embodiment is basically the same as the first embodiment, and the same reference numerals as in the first embodiment, and only different points will be described below.

Tables 13 and 14 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[ TABLE 13 ]

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

[ TABLE 14 ]

Tables 14 and 15 show the inflection points and the stagnation point design data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[ TABLE 15 ]

	Number of points of inflection	Position of reverse curvature 1	Position of reverse curvature 2	Position of reverse curvature 3
					P1R1	3	0.485	1.575	2.935
P1R2	1	1.665
					P2R1	2	1.395	2.145
P2R2	2	0.695	1.845
					P3R1	1	1.165
P3R2	0
					P4R1	0
P4R2	0
					P5R1	1	1.275
P5R2	2	0.385	1.415
					P6R1	2	0.425	1.825
P6R2	2	1.585	1.915
					P7R1	1	0.815
P7R2	1	0.975

[ TABLE 16 ]

	Number of stagnation points	Location of stagnation 1	Location of stagnation 2	Location of stagnation 3
					P1R1	3	0.925	2.145	3.275
P1R2	1	2.425
					P2R1	0
P2R2	2	1.395	2.035
					P3R1	0
P3R2	0
					P4R1	0
P4R2	0
					P5R1	0
P5R2	1	0.645
					P6R1	1	1.025
P6R2	0
					P7R1	1	1.565
P7R2	1	2.595

Fig. 14 and 15 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 656nm, 588nm, and 486nm passing through the imaging optical lens 40 according to the fourth embodiment. Fig. 16 is a schematic view showing curvature of field and distortion of light having a wavelength of 588nm after passing through the imaging optical lens 40 according to the fourth embodiment.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 1.174mm, a full field height of 3.70mm, a maximum field angle of 118.88 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.

(fifth embodiment)

The fifth embodiment is basically the same as the first embodiment, the same reference numerals as in the first embodiment, and only different points will be described below.

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

[ TABLE 17 ]

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

[ TABLE 18 ]

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

[ TABLE 19 ]

	Number of points of inflection	Position of reverse curvature 1	Position of reverse curvature 2	Position of reverse curvature 3
					P1R1	1	1.775
P1R2	1	2.555
					P2R1	1	0.055
P2R2	2	0.045	2.385
					P3R1	1	1.505
P3R2	1	1.175
					P4R1	0
P4R2	0
					P5R1	1	1.265
P5R2	2	0.555	1.545
					P6R1	3	0.765	1.165	1.825
P6R2	2	1.545	1.965
					P7R1	1	0.985
P7R2	1	1.045

[ TABLE 20 ]

Fig. 18 and 19 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 656nm, 588nm, and 486nm passing through the imaging optical lens 50 according to the fifth embodiment. Fig. 20 is a schematic view showing curvature of field and distortion of light having a wavelength of 588nm after passing through the imaging optical lens 50 according to the fifth embodiment.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 1.393mm, a full field image height of 3.70mm, a maximum field angle of 100.99 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.

[ TABLE 21 ]

Parameter and condition formula	Example 1	Example 2	Example 3	Example 4	Example 5
						f	3.600	3.175	2.661	3.288	3.899
f1	-4.680	-14.923	-6.410	-5.451	-9.624
						f2	-5001.634	-18.467	-51.908	-510.532	-1061.545
f3	7.380	7.451	8.876	64.449	7.994
						f4	4.534	5.017	4.131	5.099	48.449
f5	-5.999	-9.739	-7.920	-28.330	-8.726
						f6	1.613	1.780	1.903	2.624	2.219
f7	-2.001	-1.943	-2.291	-4.209	-3.712
						f12	-4.267	-7.814	-5.499	-5.106	-9.522
FNO	2.80	2.80	2.80	2.80	2.80
						FOV	101.00°	116.00°	133.02°	118.88°	100.99°
f1/f	-1.30	-4.70	-2.41	-1.66	-2.47
						f3/f	2.05	2.35	3.34	19.60	2.05
R7/R8	5.00	7.95	7.95	7.95	1.20
						R9/R10	-3.23	-3.05	-9.95	-9.95	-9.95

f12 is the combined focal length of the first and second lenses.

FNO is the number of apertures F of the imaging optical lens.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. An imaging optical lens, comprising seven lens elements in order from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens;

the first lens element with negative refractive power, the second lens element with negative refractive power, the third lens element with positive refractive power, the fourth lens element with positive refractive power, the fifth lens element with negative refractive power, the sixth lens element with positive refractive power, and the seventh lens element with negative refractive power;

the imaging optical lens has a maximum field angle FOV, a focal length f1, a focal length f3, a radius of curvature R7, a radius of curvature R8, a radius of curvature R9, and a radius of curvature R10, and satisfies the following relationships:

100.00°≤FOV≤135.00°；

-5.00≤f1/f≤-1.00；

2.00≤f3/f≤20.00；

1.00≤R7/R8≤8.00；

-10.00≤R9/R10≤-3.00。

2. the imaging optical lens assembly of claim 1, wherein the first lens element has a convex object-side surface and a concave image-side surface;

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, the on-axis thickness of the first lens is d1, the total optical length of the shooting optical lens is TTL, and the following relational expression is satisfied:

0.50≤(R1+R2)/(R1-R2)≤5.03；

0.01≤d1/TTL≤0.12。

3. the imaging optical lens according to claim 2, wherein the imaging optical lens satisfies the following relationship:

0.80≤(R1+R2)/(R1-R2)≤4.02；

0.02≤d1/TTL≤0.09。

4. the imaging optical lens of claim 1, wherein the second lens image side surface is concave at the paraxial region;

the focal length of the second lens is f2, the curvature radius of the object-side surface of the second lens is R3, the curvature radius of the image-side surface of the second lens is R4, the on-axis thickness of the second lens is d3, the total optical length of the photographic optical lens is TTL, and the following relational expression is satisfied:

-2278.70≤f2/f≤-3.88；

-0.22≤(R3+R4)/(R3-R4)≤42.08；

0.03≤d3/TTL≤0.15。

5. the imaging optical lens according to claim 4, wherein the imaging optical lens satisfies the following relation:

-1736.69≤f2/f≤-4.85；

-0.14≤(R3+R4)/(R3-R4)≤33.66；

0.05≤d3/TTL≤0.12。

6. the imaging optical lens assembly of claim 1, wherein the third lens element has a convex object-side surface and a concave image-side surface;

the curvature radius of the object-side surface of the third lens is R5, the curvature radius of the image-side surface of the third lens is R6, the on-axis thickness of the third lens is d5, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied:

-14.47≤(R5+R6)/(R5-R6)≤75.77；

0.01≤d5/TTL≤0.07。

7. the imaging optical lens according to claim 6, wherein the imaging optical lens satisfies the following relation:

-9.04≤(R5+R6)/(R5-R6)≤60.62；

0.02≤d5/TTL≤0.06。

8. the imaging optical lens of claim 1, wherein the fourth lens element has a concave object-side surface and a convex image-side surface;

the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, the total optical length of the image pickup optical lens is TTL, and the following relational expression is satisfied:

0.63≤f4/f≤18.64；

0.64≤(R7+R8)/(R7-R8)≤16.50；

0.03≤d7/TTL≤0.12。

9. the image-pickup optical lens according to claim 8, wherein the image-pickup optical lens satisfies the following relation:

1.01≤f4/f≤14.91；

1.03≤(R7+R8)/(R7-R8)≤13.20；

0.05≤d7/TTL≤0.10。

10. the imaging optical lens of claim 1, wherein the fifth lens element has a concave object-side surface and a concave image-side surface;

the focal length of the fifth lens is f5, the on-axis thickness of the fifth lens is d9, the total optical length of the shooting optical lens is TTL, and the following relational expression is satisfied:

-17.23≤f5/f≤-1.11；

0.25≤(R9+R10)/(R9-R10)≤1.23；

0.02≤d9/TTL≤0.21。

11. the image-pickup optical lens according to claim 10, wherein the image-pickup optical lens satisfies the following relation:

-10.77≤f5/f≤-1.39；

0.40≤(R9+R10)/(R9-R10)≤0.98；

0.03≤d9/TTL≤0.17。

12. the imaging optical lens of claim 1, wherein the sixth lens element image-side surface is convex paraxially;

the focal length of the sixth lens element is f6, the curvature radius of the object-side surface of the sixth lens element is R11, the curvature radius of the image-side surface of the sixth lens element is R12, the on-axis thickness of the sixth lens element is d11, and the total optical length of the imaging optical lens assembly is TTL and satisfies the following relation:

0.22≤f6/f≤1.20；

0.45≤(R11+R12)/(R11-R12)≤2.05；

0.06≤d11/TTL≤0.25。

13. the image-pickup optical lens according to claim 12, wherein the image-pickup optical lens satisfies the following relation:

0.36≤f6/f≤0.96；

0.71≤(R11+R12)/(R11-R12)≤1.64；

0.10≤d11/TTL≤0.20。

14. the imaging optical lens of claim 1, wherein the seventh lens element has a convex object-side surface and a concave image-side surface;

the focal length of the seventh lens element is f7, the curvature radius of the object-side surface of the seventh lens element is R13, the curvature radius of the image-side surface of the seventh lens element is R14, the on-axis thickness of the seventh lens element is d13, and the total optical length of the imaging optical lens assembly is TTL and satisfies the following relationship:

-2.56≤f7/f≤-0.37；

0.59≤(R13+R14)/(R13-R14)≤3.61；

0.02≤d13/TTL≤0.15。

15. the image-pickup optical lens according to claim 14, wherein the image-pickup optical lens satisfies the following relation:

-1.60≤f7/f≤-0.46；

0.95≤(R13+R14)/(R13-R14)≤2.88；

0.03≤d13/TTL≤0.12。

16. a camera optical lens according to claim 1, characterized in that the total optical length TTL of the camera optical lens is less than or equal to 13.19 mm.

17. A camera optical lens according to claim 16, characterized in that the total optical length TTL of the camera optical lens is less than or equal to 12.59 millimeters.

18. A camera optical lens according to claim 1, characterized in that the F-number of the aperture of the camera optical lens is less than or equal to 2.88.

19. A camera optical lens according to claim 18, characterized in that the F-number of the aperture of the camera optical lens is less than or equal to 2.83.