CN111123474A

CN111123474A - Image pickup optical lens

Info

Publication number: CN111123474A
Application number: CN201911365193.XA
Authority: CN
Inventors: 寺西孝亮; 张磊; 崔元善
Original assignee: Ruisheng Communication Technology Changzhou Co Ltd
Current assignee: AAC Communication Technologies Changzhou Co Ltd; Ruisheng Communication Technology Changzhou Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-05-08
Anticipated expiration: 2039-12-26
Also published as: CN111123474B

Abstract

The invention relates to the field of optical lenses, and discloses an image pickup optical lens, which sequentially comprises from an object side to an image side: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element, a sixth lens element, and a seventh lens element; the imaging optical lens has a maximum field angle of FOV, an on-axis thickness of the first lens is d1, an on-axis thickness of the third lens is d5, an on-axis thickness of the second lens is d3, an abbe number of the first lens is v1, and an abbe number of the seventh lens is v7, and the following relations are satisfied: the FOV is more than or equal to 100.00 degrees and less than or equal to 135.00 degrees, the (d1+ d5)/d3 is more than or equal to 2.50 degrees and less than or equal to 4.00 degrees, and the v1-v7 is more than or equal to 10.00 degrees and less than or equal to 30.00 degrees. The imaging optical lens can obtain high imaging performance and low TTL.

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) Device, and due to the refinement of semiconductor manufacturing 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, and thus, 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 element with negative refractive power, a second lens element with positive refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element, a sixth lens element, and a seventh lens element;

the imaging optical lens has a maximum field angle FOV, an on-axis thickness of the first lens is d1, an on-axis thickness of the third lens is d5, an on-axis thickness of the second lens is d3, an abbe number of the first lens is v1, and an abbe number of the seventh lens is v7, and the following relations are satisfied:

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 element is concave in the paraxial region, and the image-side surface thereof is concave in the paraxial region; the focal length of the first lens is f1, the focal length of the image pickup optical lens is f, 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 total optical length of the image pickup optical lens is TTL, and the following relational expression 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 relational expression:

-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 element is convex in the paraxial region, and the image-side surface thereof is concave in the paraxial region; the focal length of the second lens is f2, the focal length of the image pickup optical lens is f, 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 total optical length of the image pickup optical lens is TTL, and the following relational expression is satisfied:

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

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 element is convex in the paraxial region, and the image-side surface thereof is convex in the paraxial region; the focal length of the third lens is f3, the focal length of the imaging optical lens is f, 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:

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

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 at the paraxial region; the focal length of the fourth lens element is f4, the focal length of the image pickup optical lens is f, the curvature radius of the object-side surface of the fourth lens element is R7, the curvature radius of the image-side surface of the fourth lens element is R8, the on-axis thickness of the fourth lens element is d7, and the optical total length of the image pickup optical lens is TTL and satisfies the following relation:

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

-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 element is f5, the focal length of the image-capturing optical lens element is f, the radius of curvature of the object-side surface of the fifth lens element is R9, the radius of curvature of the image-side surface of the fifth lens element is R10, the on-axis thickness of the fifth lens element is d9, the total optical length of the image-capturing optical lens element is TTL, and the following relationships are satisfied:

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

-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 element is f6, the focal length of the image-capturing optical lens element is f, 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 image-capturing optical lens element 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。

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

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 focal length of the imaging optical lens is f, 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 element is TTL, which satisfies the following relation:

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

-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 image pickup optical lens is less than or equal to 7.32 millimeters.

Preferably, the total optical length TTL of the image pickup optical lens is less than or equal to 6.98 millimeters.

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

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

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 of 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: the zoom lens comprises a first lens element L1 with negative refractive power, a second lens element L2 with positive refractive power, a stop S1, a third lens element L3 with positive refractive power, a fourth lens element L4 with negative refractive power, a fifth lens element L5, a sixth lens element L6 and a seventh lens element 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 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 L7 is made of glass.

Defining the maximum field angle of the image pickup optical lens 10 as FOV, and satisfying the following relation: FOV is more than or equal to 100.00 degrees and less than or equal to 135.00 degrees. In the range where the maximum field angle of the imaging optical lens 10 satisfies the relational expression, ultra-wide-angle imaging can be realized, and user experience is improved.

Defining 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, the following relations are satisfied: 2.50 is less than or equal to (d1+ d5)/d3 is less than or equal to 4.00. The ratio of the sum of the thicknesses of the first lens L1 and the third lens L3 on the axis to the thickness of the second lens L2 on the axis is defined, and the thicknesses of the first three lenses are reasonably controlled within the range, so that the processing of the lenses is facilitated, the yield of products is improved, and the cost is reduced.

Defining the abbe number of the first lens L1 as v1 and the abbe number of the seventh lens L7 as v7, the following relations are satisfied: v1-v7 is more than or equal to 10.00 and less than or equal to 30.00. The difference value of the dispersion coefficients of the first lens L1 and the seventh lens L7 is regulated, so that the dispersion of the shooting optical lens can be effectively corrected within the range, the shooting definition is improved, the real color of a shot object is close to, and the imaging quality is improved.

When the focal length of the image pickup optical lens 10, the focal lengths of the respective lenses, the refractive indices of the respective lenses, the optical total length of the image pickup optical lens, the on-axis thickness, and the curvature radius satisfy the above-described relational expressions, the image pickup optical lens 10 can have high performance and meet the design requirement of low TTL.

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

Defining the focal length of the first lens L1 as f1, the focal length of the image pickup optical lens 10 as f, and satisfying the following relation: f1/f is not less than-4.47 and not more than-1.09. When the refractive power of the first lens element L1 is within the predetermined range, the first lens element L1 has a negative refractive power, which is beneficial to reducing system aberration and is beneficial to the development of ultra-thin and wide-angle lenses. Preferably, -2.79. ltoreq. f 1/f. ltoreq-1.37.

The curvature radius of the object side surface of the first lens L1 is defined as R1, the curvature radius of the image side surface of the first lens L1 is defined as R2, and the following relational expressions are satisfied: -0.10 ≤ (R1+ R2)/(R1-R2) 1.04. The shape of the first lens L1 is specified, and the shape of the first lens L1 is controlled appropriately within the conditional expression range, so that the first lens L1 can effectively correct the system spherical aberration. Preferably, -0.06 ≦ (R1+ R2)/(R1-R2) ≦ 0.84.

The total optical length of the image pickup optical lens 10 is defined as TTL, and satisfies the following relation: d1/TTL is more than or equal to 0.03 and less than or equal to 0.17. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.05. ltoreq. d 1/TTL. ltoreq.0.14.

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

Defining the focal length of the second lens L2 as f2, the focal length of the image pickup optical lens 10 as f, and satisfying the following relation: f2/f is not less than 3.38 and not more than 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 defined, and the positive power of the second lens L2 is controlled within a reasonable range in the conditional expression range, which is advantageous for correcting aberrations 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, the curvature radius of the image side surface of the second lens L2 is R4, and the following relational expression is satisfied: the ratio of (R3+ R4)/(R3-R4) is less than or equal to-552.14 and less than or equal to 28.81. The shape of the second lens L2 is defined, and the lens is made thinner and wider in angle within the range of the conditional expression, which is advantageous for correcting the problem of chromatic aberration on the axis. Preferably, -345.09 ≦ (R3+ R4)/(R3-R4). ltoreq.23.04.

The total optical length of the image pickup optical lens 10 is TTL, and satisfies the following relational expression: d3/TTL is more than or equal to 0.02 and less than or equal to 0.12. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.04. ltoreq. d 3/TTL. ltoreq.0.09.

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

Defining a focal length f3 of the third lens element, a focal length f of the image pickup optical lens, and satisfying the following relations: f3/f is more than or equal to 0.37 and less than or equal to 1.49. The ratio of the focal length f3 of the third lens L3 to the focal length f of the image pickup optical lens 10 is specified, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power within a conditional expression range. Preferably, 0.59. ltoreq. f 3/f. ltoreq.1.19.

The curvature radius of the object side surface of the third lens L3 is R5, the curvature radius of the image side surface of the third lens L3 is R6, and the following relational expression is satisfied: 0.10-0.62 of (R5+ R6)/(R5-R6). Within the scope of the conditional expressions, the shape of the third lens L3 can be effectively controlled, which is beneficial to molding the third lens L3 and avoids the generation of molding defects and stress caused by the excessive surface curvature of the third lens L3. Preferably, 0.16 ≦ (R5+ R6)/(R5-R6). ltoreq.0.49.

The on-axis thickness of the third lens L3 is d5, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d5/TTL is more than or equal to 0.06 and less than or equal to 0.19. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.09. ltoreq. d 5/TTL. ltoreq.0.15.

In this embodiment, the image-side surface of the fourth lens L4 is concave in the paraxial region.

Defining the focal length of the fourth lens L4 as f4, the focal length of the image pickup optical lens 10 as f, and satisfying the following relation: 9.37 ≦ f4/f ≦ -1.43, and the ratio of the focal length f4 of the fourth lens L4 to the focal length f of the image pickup optical lens 10 is defined, so that the system has better imaging quality and lower sensitivity through reasonable distribution of the optical power within the conditional expression range, which is helpful for improving the performance of the optical system. Preferably, -5.86. ltoreq. f 4/f. ltoreq-1.79.

The curvature radius of the object side surface of the fourth lens L4 is R7, the curvature radius of the image side surface of the fourth lens L4 is R8, and the following relations are satisfied: the ratio of (R7+ R8)/(R7-R8) is not more than 0.47 and not more than 6.41. The shape of the fourth lens L4 is defined, and it is advantageous to correct the problem of aberration of the off-axis view angle and the like as the thickness becomes thinner and the angle becomes wider within the conditional expression. Preferably, 0.75 ≦ (R7+ R8)/(R7-R8). ltoreq.5.13.

The on-axis thickness of the fourth lens L4 is d7, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d7/TTL is more than or equal to 0.02 and less than or equal to 0.11. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.03. ltoreq. d 7/TTL. ltoreq.0.08.

In the present embodiment, the focal length of the fifth lens L5 is defined as f5, the focal length of the imaging optical lens 10 is defined as f, and the following relational expression is satisfied: 9.89 is less than or equal to f5/f is less than or equal to 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, and the definition of the fifth lens L5 can effectively make the light angle of the imaging optical lens 10 gentle and reduce tolerance sensitivity within the conditional expression range. Preferably, -6.18. ltoreq. f 5/f. ltoreq.4.47.

The curvature radius of the object side surface of the fifth lens L5 is R9, the curvature radius of the image side surface of the fifth lens L5 is R10, and the following relational expression is satisfied: -3.13 ≤ (R9+ R10)/(R9-R10) 2.14. The shape of the fifth lens L5 is defined, and when the condition is within the range, it is advantageous to correct the problem such as the aberration of the off-axis view angle as the ultra-thin wide angle is increased. Preferably, -1.95 ≦ (R9+ R10)/(R9-R10). ltoreq.1.71.

The on-axis thickness of the fifth lens L5 is d9, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d9/TTL is more than or equal to 0.04 and less than or equal to 0.16. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.06. ltoreq. d 9/TTL. ltoreq.0.13.

In the present embodiment, the focal length of the sixth lens element L6 is defined as f6, and the focal length of the imaging optical lens system 10 is defined as f, and the following relational expression 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 image pickup optical lens 10 is specified, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power within a conditional expression range. Preferably, -217.34. ltoreq. f 6/f. ltoreq.0.90.

The curvature radius of the object side surface of the sixth lens L6 is R11, the curvature radius of the image side surface of the sixth lens L6 is R12, and the following relational expression is satisfied: -3.61 ≦ (R11+ R12)/(R11-R12) 1.44. The shape of the sixth lens L6 is specified, and it is advantageous to correct problems such as off-axis aberration with the progress of an extremely thin and wide angle within the conditional expression. Preferably, -2.26 ≦ (R11+ R12)/(R11-R12). ltoreq.1.15.

The on-axis thickness of the sixth lens element L6 is d11, the total optical length of the imaging optical lens system 10 is TTL, and the following relationships are satisfied: d11/TTL is more than or equal to 0.02 and less than or equal to 0.22. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.03. ltoreq. d 11/TTL. ltoreq.0.18.

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

Defining the focal length of the seventh lens L7 as f7 and the focal length of the image pickup optical lens 10 as f, the following relations are 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 image pickup optical lens 10 is specified, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power within a conditional expression range. Preferably, -1.91. ltoreq. f 7/f. ltoreq. 183.67.

The curvature radius of the object side surface of the seventh lens L7 is R13, the curvature radius of the image side surface of the seventh lens L7 is R14, and the following relational expression is satisfied: 0.89-14.60 percent (R13+ R14)/(R13-R14). The shape of the seventh lens L7 is specified, and it is advantageous to correct problems such as off-axis aberration with the progress of an extremely thin and wide angle within the conditional expression. Preferably, 1.43 ≦ (R13+ R14)/(R13-R14). ltoreq.11.68.

The on-axis thickness of the seventh lens L7 is d13, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d13/TTL is more than or equal to 0.04 and less than or equal to 0.27. Within the range of conditional expressions, the ultra-thinning is favorably realized. Preferably, 0.07. ltoreq. d 13/TTL. ltoreq.0.22.

In the present embodiment, the total optical length TTL of the imaging optical lens 10 is defined to be less than or equal to 7.32 millimeters. And the ultra-thinning is favorably realized. Preferably, the total optical length TTL of the image pickup optical lens 10 is less than or equal to 6.98 millimeters.

In the present embodiment, the number of the diaphragm F of the imaging optical lens 10 is defined to be 2.88 or less. The large aperture is facilitated to be realized, 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 1 st lens L1 to the image forming surface) 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;

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 ]

	Number of points of inflection	Position of reverse curvature 1	Position of reverse curvature 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 ]

	Number of stagnation points	Location of stagnation 1	Location of stagnation 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

Fig. 2 and 3 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 650nm, 555nm, and 470nm, 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 555nm 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 10 has an entrance pupil diameter of 1.291mm, a full field image height of 3.25mm, a maximum field angle of 100.12 °, 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
				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 ]

Fig. 6 and 7 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 650nm, 555nm, and 470nm, 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 555nm 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 20 has an entrance pupil diameter of 1.011mm, a full field image height of 3.25mm, a maximum field angle of 108.29 °, 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 ]

	Number of points of inflection	Position of reverse curvature 1	Position of reverse curvature 2	Position of reverse curvature 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		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 ]

	Number of stagnation points	Location of stagnation 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

Fig. 10 and 11 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 650nm, 555nm, and 470nm, respectively, after 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 555nm after passing through the imaging optical lens 30 according to the third embodiment.

Table 21 below shows the numerical values corresponding to the respective conditional expressions in the present embodiment in accordance with the conditional expressions. Obviously, the imaging optical system of the present embodiment satisfies the above conditional expressions.

In the present embodiment, the imaging optical lens 30 has an entrance pupil diameter of 1.213mm, a full field height of 3.25mm, a maximum field angle of 114.03 °, 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 15 and 16 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	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 ]

Fig. 15 and 16 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 650nm, 555nm, and 470nm, respectively, after 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 555nm after passing through the imaging optical lens 40 according to the fourth embodiment.

In the present embodiment, the imaging optical lens 40 has an entrance pupil diameter of 1.089mm, a full field image height of 3.25mm, a maximum field angle of 114.26 °, 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 ]

[ TABLE 20 ]

	Number of stagnation points	Location of stagnation 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

Fig. 19 and 20 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 650nm, 555nm, and 470nm, respectively, after 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 555nm after passing through the imaging optical lens 50 according to the fifth embodiment.

In the present embodiment, the imaging optical lens 50 has an entrance pupil diameter of 1.094mm, a full field image height of 3.25mm, a maximum field angle of 134.77 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.

[ TABLE 21 ]

Fno is the F-number of the diaphragm of the image pickup 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, in order from an object side to an image side, comprising: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element, a sixth lens element, and a seventh lens element;

100.00°≤FOV≤135.00°,

2.50≤(d1+d5)/d3≤4.00,

10.00≤v1-v7≤30.00。

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

the focal length of the first lens is f1, the focal length of the image pickup optical lens is f, 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 total optical length of the image pickup optical lens is TTL, and the following relational expression is satisfied:

-4.47≤f1/f≤-1.09；

-0.10≤(R1+R2)/(R1-R2)≤1.04；

0.03≤d1/TTL≤0.17。

3. the imaging optical lens according to 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。

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

the focal length of the second lens is f2, the focal length of the image pickup optical lens is f, 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 total optical length of the image pickup optical lens is TTL, and the following relational expression is satisfied:

3.38≤f2/f≤33.57；

-552.14≤(R3+R4)/(R3-R4)≤28.81；

0.02≤d3/TTL≤0.12。

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

5.42≤f2/f≤26.86；

-345.09≤(R3+R4)/(R3-R4)≤23.04；

0.04≤d3/TTL≤0.09。

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

the focal length of the third lens element is f3, the focal length of the image pickup optical lens element is f, the curvature radius of the object-side surface of the third lens element is R5, the curvature radius of the image-side surface of the third lens element is R6, and the total optical length of the image pickup optical lens element is TTL and satisfies the following relation:

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

0.59≤f3/f≤1.19；

0.16≤(R5+R6)/(R5-R6)≤0.49；

0.09≤d5/TTL≤0.15。

8. the imaging optical lens of claim 1, wherein the fourth lens image-side surface is concave at the paraxial region;

the focal length of the fourth lens element is f4, the focal length of the image pickup optical lens is f, the curvature radius of the object-side surface of the fourth lens element is R7, the curvature radius of the image-side surface of the fourth lens element is R8, the on-axis thickness of the fourth lens element is d7, and the optical total length of the image pickup optical lens is TTL and satisfies the following relation:

-9.37≤f4/f≤-1.43；

0.47≤(R7+R8)/(R7-R8)≤6.41；

0.02≤d7/TTL≤0.11。

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

-5.86≤f4/f≤-1.79；

0.75≤(R7+R8)/(R7-R8)≤5.13；

0.03≤d7/TTL≤0.08。

10. the imaging optical lens of claim 1, wherein the focal length of the fifth lens element 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 element is R9, the radius of curvature of the image-side surface of the fifth lens element is R10, the on-axis thickness of the fifth lens element is d9, the total optical length of the imaging optical lens is TTL, and the following relationships are satisfied:

-9.89≤f5/f≤5.58；

-3.13≤(R9+R10)/(R9-R10)≤2.14；

0.04≤d9/TTL≤0.16。

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

-6.18≤f5/f≤4.47；

-1.95≤(R9+R10)/(R9-R10)≤1.71；

0.06≤d9/TTL≤0.13。

12. the imaging optical lens of claim 1, wherein the focal length of the sixth lens element is f6, the focal length of the imaging optical lens is f, 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 is TTL, and the following relationships are satisfied:

-347.74≤f6/f≤1.12；

-3.61≤(R11+R12)/(R11-R12)≤1.44；

0.02≤d11/TTL≤0.22。

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

-217.34≤f6/f≤0.90；

-2.26≤(R11+R12)/(R11-R12)≤1.15；

0.03≤d11/TTL≤0.18。

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 focal length of the imaging optical lens is f, 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 element is TTL, which satisfies the following relation:

-3.06≤f7/f≤229.58；

0.89≤(R13+R14)/(R13-R14)≤14.60；

0.04≤d13/TTL≤0.27。

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

-1.91≤f7/f≤183.67；

1.43≤(R13+R14)/(R13-R14)≤11.68；

0.07≤d13/TTL≤0.22。

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 7.32 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 6.98 mm.

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.