CN111025547B

CN111025547B - Image pickup optical lens

Info

Publication number: CN111025547B
Application number: CN201911335425.7A
Authority: CN
Inventors: 陈晨曦阳
Original assignee: Chengrui Optics Changzhou Co Ltd
Current assignee: Chengrui Optics Changzhou Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2021-08-20
Anticipated expiration: 2039-12-23
Also published as: CN111025547A

Abstract

The invention discloses a camera optical lens, comprising: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with positive refractive power, and a fifth lens element with negative refractive power; the following relation is satisfied: f3/f is more than or equal to 6.00 and less than or equal to 7.00; f4/f is more than or equal to 0.70 and less than or equal to 1.00; R3/R4 is more than or equal to 2.50 and less than or equal to 6.00; 1.20-5.00 of (R9+ R10)/(R9-R10); R5/R6 is more than 0.00 and less than or equal to 0.60. The camera optical lens provided by the invention has good optical performance, and meets the design requirements of large aperture, wide angle and ultra-thinness.

Description

Image pickup optical lens

[ technical field ] A method for producing a semiconductor device

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 of the invention ]

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 in a form of being excellent in function, light, thin, short and small, 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. However, 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 for the imaging quality is continuously improved, the five-piece lens structure gradually appears in the lens design, although the common five-piece lens has good optical performance, the focal power, the lens interval and the lens shape setting still have certain irrationality, so that the design requirements of large aperture, ultra-thinning and wide-angle cannot be met while the lens structure has good optical performance.

[ summary of the invention ]

In view of the above problems, an object of the present invention is to provide an imaging optical lens that has good optical performance and satisfies design requirements for a large aperture, ultra-thin thickness, and wide angle.

To solve the above technical problems, an embodiment of the present invention provides an imaging optical lens system, which includes five lenses, in order from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with positive refractive power, and a fifth lens element with negative refractive power; the object side surface of the first lens is convex at the paraxial part, and the image side surface of the first lens is concave at the paraxial part; the object side surface of the second lens is convex at the paraxial part, and the image side surface of the second lens is concave at the paraxial part; the object side surface of the third lens is convex at the paraxial part, and the image side surface of the third lens is concave at the paraxial part; the image side surface of the fourth lens is convex at the paraxial part; the object side surface of the fifth lens is convex at the paraxial part, and the image side surface of the fifth lens is concave at the paraxial part;

the focal length of the imaging optical lens is f, the focal length of the third lens is f3, the focal length of the fourth lens is f4, 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 curvature radius of the object-side surface of the fifth lens is R9, the curvature radius of the image-side surface of the fifth lens is R10, the curvature radius of the object-side surface of the third lens is R5, and the curvature radius of the image-side surface of the third lens is R6, so that the following relational expression is satisfied:

6.00≤f3/f≤7.00；

0.70≤f4/f≤1.00；

2.50≤R3/R4≤6.00；

1.20≤(R9+R10)/(R9-R10)≤5.00；

0.00＜R5/R6≤0.60。

the on-axis thickness of the fourth lens L4 is d7, the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, and the following relation is satisfied:

1.20≤d7/d8≤2.50。

preferably, the focal length of the first lens element is f1, the curvature radius of the object-side surface of the first lens element is R1, the curvature radius of the image-side surface of the first lens element is R2, the on-axis thickness of the first lens element is d1, and the total optical length of the imaging optical lens system is TTL and satisfies the following relationships:

0.47≤f1/f≤1.63；

-3.36≤(R1+R2)/(R1-R2)≤-1.09；

0.05≤d1/TTL≤0.17。

preferably, the focal length of the second lens is f2, the on-axis thickness of the second lens is d3, the total optical length of the imaging optical lens is TTL, and the following relation is satisfied:

-4.45≤f2/f≤-1.20；

0.70≤(R3+R4)/(R3-R4)≤3.40；

0.01≤d3/TTL≤0.06。

preferably, the on-axis thickness of the third lens element is d5, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

-7.32≤(R5+R6)/(R5-R6)≤-0.81；

0.03≤d5/TTL≤0.12。

preferably, 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 total optical length of the imaging optical lens system is TTL and satisfies the following relationship:

0.48≤(R7+R8)/(R7-R8)≤1.74；

0.06≤d7/TTL≤0.24。

preferably, the focal length of the fifth lens element is f5, the on-axis thickness of the fifth lens element is d9, the total optical length of the imaging optical lens system is TTL, and the following relationship is satisfied:

-2.76≤f5/f≤-0.36；

0.02≤d9/TTL≤0.12。

preferably, the field angle of the imaging optical lens is FOV, and satisfies the following relation:

FOV≥82.00°。

preferably, the combined focal length of the first lens and the second lens is f12, and the following relation is satisfied:

0.72≤f12/f≤3.02。

preferably, the F number of the diaphragm of the imaging lens is Fno, and the following relation is satisfied:

Fno≤2.05。

the invention has the advantages that the camera optical lens has good optical performance, has the characteristics of large aperture, wide angle and ultra-thin, 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.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic configuration diagram of an imaging optical lens according to a first embodiment;

fig. 2 is a schematic view of axial aberrations of the image-taking optical lens shown in 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 shown in FIG. 1;

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

fig. 6 is a schematic view of axial aberrations of the image pickup optical lens shown in 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 shown in FIG. 5;

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

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;

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 of a fifth embodiment;

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 ] embodiments

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 imaging optical lens 10 according to a first embodiment of the present invention, and the imaging optical lens 10 includes five lenses in total. Specifically, the imaging optical lens 10, in order from an object side to an image side, includes: the stop S1, the first lens element L1 with positive refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with positive refractive power, the fourth lens element L4 with positive refractive power, and the fifth lens element L5 with negative refractive power. An optical element such as an optical filter (filter) GF may be disposed between the fifth lens L5 and the image plane Si. The object-side surface of the first lens element L1 is convex at the paraxial region, and the image-side surface thereof is concave at the paraxial region; the object-side surface of the second lens element L2 is convex at the paraxial region, and the image-side surface thereof is concave at the paraxial region; 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 image-side surface of the fourth lens element L4 is convex at the paraxial region; the object-side surface of the fifth lens element L5 is convex at the paraxial region, and the image-side surface thereof is concave at the paraxial region.

In the present embodiment, the focal length of the imaging optical lens is f, and the focal length of the third lens L3 is f3, and the following relationship is satisfied: f3/f is more than or equal to 6.00 and less than or equal to 7.00; the ratio of the focal length of the third lens L3 to the focal length of the image pickup optical lens is specified, which is favorable for aberration correction in a conditional expression specified range, and improves the imaging quality.

The focal length of the fourth lens L4 is f4, and the following relation is satisfied: f4/f is more than or equal to 0.70 and less than or equal to 1.00, and the ratio of the focal length of the fourth lens L4 to the focal length of the image pickup optical lens is regulated, so that the image quality is improved within a condition range.

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: R3/R4 is more than or equal to 2.50 and less than or equal to 6.00; the ratio of the curvature radius of the object side surface of the second lens L2 to the curvature radius of the image side surface of the second lens L2 is regulated, and when R3/R4 meets the condition, the sensitivity of the second lens L2 is favorably reduced, and the product yield is improved.

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: 1.20-5.00 of (R9+ R10)/(R9-R10); the shape of the fifth lens L5 is specified, which is beneficial to reducing the deflection degree of the light rays in the lens and reducing the aberration in a condition range.

The curvature radius of the object side surface of the third lens L3 is R5, the curvature radius of the side surface of the third lens L3 is R6, and the following relational expression is satisfied: R5/R6 is more than 0.00 and less than or equal to 0.60. The ratio of the curvature radius of the object side surface of the third lens L3 to the curvature radius of the image side surface of the third lens L3 is specified, and when R5/R6 meets the condition, the lens processing is facilitated.

Defining the on-axis thickness of the fourth lens L4 as d7, the on-axis distance of the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5 as d8, and satisfying the following relationship: d7/d8 is more than or equal to 1.20 and less than or equal to 2.50. When d7/d8 meets the condition, the total length of the system is favorably reduced, and ultra-thinning is realized.

Defining the focal length of the first lens L1 as f1, the following relation is satisfied: f1/f is more than or equal to 0.47 and less than or equal to 1.63, and the ratio of the focal length of the first lens L1 to the overall focal length is specified. Within the specified range, the first lens element L1 has a positive refractive power, which is favorable for reducing system aberration and is favorable for the lens to be ultra-thin and wide-angled. Preferably, 0.75. ltoreq. f 1/f. ltoreq.1.31 is satisfied.

The curvature radius of the object side surface of the first lens L1 is R1, the curvature radius of the image side surface of the first lens L1 is R2, and the following relational expression is satisfied: -3.36 ≤ (R1+ R2)/(R1-R2) ≤ 1.09; the shape of the first lens L1 is appropriately controlled so that the first lens L1 can effectively correct the system spherical aberration. Preferably, it satisfies-2.10 ≦ (R1+ R2)/(R1-R2) ≦ -1.36.

The on-axis thickness of the first lens L1 is d1, the total optical length of the image pickup optical lens is TTL, and the following relational expression is satisfied: d1/TTL is more than or equal to 0.05 and less than or equal to 0.17, and ultra-thinning is facilitated. Preferably, 0.09. ltoreq. d 1/TTL. ltoreq.0.14 is satisfied.

Defining the focal length of the second lens L2 as f2, the following relation is satisfied: 4.45 ≦ f2/f ≦ -1.20, and it is advantageous to correct aberrations of the optical system by controlling the negative power of the second lens L2 within a reasonable range. Preferably, it satisfies-2.78. ltoreq. f 2/f. ltoreq-1.50.

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 second lens L2 is defined in a shape of (R3+ R4)/(R3-R4) of 0.70 to 3.40, 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, 1.12. ltoreq. (R3+ R4)/(R3-R4). ltoreq.2.72 is satisfied.

The on-axis thickness of the second lens L2 is d3, and the following relation is satisfied: d3/TTL is more than or equal to 0.01 and less than or equal to 0.06, and ultra-thinning is facilitated. Preferably, 0.02. ltoreq. d 3/TTL. ltoreq.0.05 is satisfied.

The curvature radius of the object side surface of the third lens L3 is defined as R5, and the curvature radius of the image side surface of the third lens L3 is defined as R6, and the following relations are satisfied: 7.32 ≦ (R5+ R6)/(R5-R6) ≦ -0.81, and defines the shape of the third lens L3, and within the range defined by the conditional expression, the degree of deflection of the light passing through the lens can be alleviated, and the aberration can be effectively reduced. Preferably, it satisfies-4.57 ≦ (R5+ R6)/(R5-R6) ≦ -1.02.

The third lens L3 has an on-axis thickness d5, and satisfies the following relation: d5/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 5/TTL. ltoreq.0.10 is satisfied.

The curvature radius of the object side surface of the fourth lens L4 is defined as R7, and the curvature radius of the image side surface of the fourth lens L4 is defined as R8, and the following relations are satisfied: 0.48 is less than or equal to (R7+ R8)/(R7-R8) is less than or equal to 1.74. The shape of the fourth lens L4 is defined, and when the fourth lens is within the range, it is advantageous to correct the problems such as aberration of the off-axis view angle as the thickness and the angle of view are increased. Preferably, it satisfies 0.77. ltoreq. R7+ R8)/(R7-R8. ltoreq.1.39.

The on-axis thickness of the fourth lens L4 is d7, and the following relation is satisfied: d7/TTL is more than or equal to 0.06 and less than or equal to 0.24, and ultra-thinning is facilitated. Preferably, 0.10. ltoreq. d 7/TTL. ltoreq.0.19 is satisfied.

Defining the focal length of the fifth lens L5 as f5, the following relation is satisfied: f5/f is more than or equal to-2.76 and less than or equal to-0.36. The definition of the fifth lens L5 can effectively make the light ray angle of the camera lens smooth, and reduce tolerance sensitivity. Preferably, it satisfies-1.72. ltoreq. f 5/f. ltoreq-0.45.

The on-axis thickness of the fifth lens L5 is d9, and the following relation is satisfied: d9/TTL is more than or equal to 0.02 and less than or equal to 0.12, and ultra-thinning is facilitated. Preferably, 0.04. ltoreq. d 9/TTL. ltoreq.0.10 is satisfied.

In the present embodiment, the field angle of the imaging optical lens 10 is FOV, and satisfies the following relational expression: the FOV is more than or equal to 82.00 degrees, which is beneficial to realizing wide angle.

In this embodiment, the combined focal length of the first lens L1 and the second lens L2 is defined as f12, and the following relationship is satisfied: f12/f is more than or equal to 0.72 and less than or equal to 3.02; within the range of the conditional expressions, the aberration and distortion of the imaging optical lens 10 can be eliminated, and the back focal length of the imaging optical lens 10 can be suppressed, thereby maintaining the miniaturization of the image lens system. Preferably, 1.16. ltoreq. f 12/f. ltoreq.2.42 is satisfied.

In the present embodiment, the F-number of the imaging optical lens 10 is Fno, and satisfies the following relational expression: fno is less than or equal to 2.05, which is beneficial to realizing large aperture and has good imaging performance.

When the focal length of the image pickup optical lens 10, the focal length of each lens and the curvature radius satisfy the above relational expression, the image pickup optical lens 10 can have good optical performance, and design requirements of a large aperture, a wide angle and ultra-thinness can be satisfied; in accordance with the characteristics of the optical lens 10, the optical lens 10 is particularly suitable for a mobile phone camera lens module and a WEB camera lens which are configured by image pickup devices such as a high-pixel CCD and a CMOS.

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: total optical length (on-axis distance from the object-side surface of the first lens L1 to the image plane) in 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: radius of curvature of the object side of the optical filter GF;

r12: 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: the on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the optical filter GF;

d 11: on-axis thickness of the optical filter GF;

d 12: 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;

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;

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, A16, A18, A20 are aspheric coefficients.

y＝(x²/R)/[1+{1-(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶+A18x¹⁸+A20x²⁰ (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, and P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5, 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
			P1R1
P1R2
			P2R1
P2R2
			P3R1	1	0.315
P3R2	1	0.115
			P4R1	1	0.585
P4R2
			P5R1	1	0.325
P5R2	1	1.295

Fig. 2 and 3 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 486nm, 588nm, and 656nm 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 corresponding to the parameters defined in the conditional expressions, for each of the numerical values in the first, second, third, fourth, and fifth embodiments.

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 1.761mm, a full field image height of 3.24mm, and a diagonal field angle of 82.50 °, so that the imaging lens has a wide angle and a slim 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, and the reference numerals are the same as those in the first embodiment, and the configuration of the image pickup optical lens 20 of the second embodiment is shown in fig. 5, and only the differences 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 ]

[ TABLE 8 ]

	Number of stagnation points	Location of stagnation 1
			P1R1
P1R2
			P2R1
P2R2
			P3R1	1	0.385
P3R2	1	0.365
			P4R1	1	0.565
P4R2
			P5R1	1	0.305
P5R2	1	1.235

Fig. 6 and 7 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 486nm, 588nm and 656nm 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 1.747mm, a full field image height of 3.24mm, and a diagonal field angle of 84.29 °, so that the imaging optical lens has a wide angle of view, a slim profile, and 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, and the reference numerals are the same as those in the first embodiment, and the configuration of the imaging optical lens 30 of the third embodiment is shown in fig. 9, and only the differences 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	Position of reverse curve 4
						P1R1
P1R2	2	0.765	0.825
						P2R1	4	0.195	0.385	0.785	0.825
P2R2
						P3R1	2	0.195	0.805
P3R2	2	0.085	0.885
						P4R1	1	1.485
P4R2	1	1.105
						P5R1	2	0.195	1.215
P5R2	2	0.465	2.505

[ TABLE 12 ]

Fig. 10 and 11 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 486nm, 588nm, and 656nm 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.

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 lens of the present embodiment satisfies the above conditional expressions.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 1.718mm, a full field image height of 3.24mm, and a diagonal field angle of 83.80 °, and has excellent optical characteristics, in which the imaging optical lens is made wide-angle and slim, and its on-axis and off-axis chromatic aberration is sufficiently corrected.

(fourth embodiment)

The fourth embodiment is basically the same as the first embodiment, and the reference numerals are the same as those in the first embodiment, and the configuration of the imaging optical lens 40 of the fourth embodiment is shown in fig. 13, and only the differences 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	Position of reverse curve 4	Position of reverse curve 5
							P1R1
P1R2
							P2R1	5	0.175	0.355	0.645	0.715	0.765
P2R2
							P3R1	2	0.225	0.785
P3R2	2	0.055	0.915
							P4R1	1	1.345
P4R2	1	0.995
							P5R1	2	0.235	1.185
P5R2	1	0.345

[ TABLE 16 ]

Fig. 14 and 15 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 486nm, 588nm and 656nm 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 1.625mm, a full field image height of 3.24mm, and a diagonal field angle of 86.49 °, and has excellent optical characteristics, in which the imaging optical lens is made wide-angle and slim, and its on-axis and off-axis chromatic aberration is sufficiently corrected.

(fifth embodiment)

The fifth embodiment is basically the same as the first embodiment, and the reference numerals are the same as those in the first embodiment, and the configuration of the imaging optical lens 50 of the fifth embodiment is shown in fig. 17, and only the differences 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 fourth 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
				P1R1
P1R2
				P2R1
P2R2
				P3R1	2	0.225	0.825
P3R2	2	0.205	0.885
				P4R1	2	0.415	1.435
P4R2	2	1.105	1.645
				P5R1	2	0.195	1.215
P5R2	2	0.455	2.495

[ TABLE 20 ]

	Number of stagnation points	Location of stagnation 1
			P1R1
P1R2
			P2R1
P2R2
			P3R1	1	0.385
P3R2	1	0.345
			P4R1	1	0.535
P4R2
			P5R1	1	0.355
P5R2	1	1.245

Fig. 18 and 19 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 486nm, 588nm and 656nm passing through the imaging optical lens 50 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 50 according to the fourth embodiment.

In the present embodiment, the imaging optical lens has an entrance pupil diameter of 1.731mm, a full field image height of 3.24mm, and a diagonal field angle of 84.32 °, and has excellent optical characteristics, in which the imaging optical lens is made wide-angle and slim, and its on-axis and off-axis chromatic aberration is sufficiently corrected.

[ TABLE 21 ]

Parameter and condition formula	Example one	Example two	EXAMPLE III	Example four	EXAMPLE five
						f3/f	6.079	6.852	6.525	6.816	7.000
f4/f	0.735	0.745	0.807	0.993	0.756
						R3/R4	5.90	2.58	5.92	5.09	2.60
(R9+R10)/(R9-R10)	1.44	1.30	1.56	4.98	1.50
						R5/R6	0.10	0.57	0.12	0.15	0.55
f12/f	1.619	1.450	1.683	2.016	1.507
						f	3.599	3.571	3.511	3.322	3.537
f1	3.353	3.382	3.375	3.615	3.421
						f2	-6.472	-7.947	-6.504	-6.657	-7.858
f3	21.879	24.470	22.909	22.643	24.759
						f4	2.647	2.659	2.833	3.300	2.673
f5	-2.231	-1.937	-2.245	-4.583	-2.086
						f12	5.825	5.177	5.910	6.698	5.329
Fno	2.04	2.04	2.04	2.04	2.04

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 includes five lens elements, in order from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with positive refractive power, and a fifth lens element with negative refractive power; the object side surface of the first lens is convex at the paraxial part, and the image side surface of the first lens is concave at the paraxial part; the object side surface of the second lens is convex at the paraxial part, and the image side surface of the second lens is concave at the paraxial part; the object side surface of the third lens is convex at the paraxial part, and the image side surface of the third lens is concave at the paraxial part; the image side surface of the fourth lens is convex at the paraxial part; the object side surface of the fifth lens is convex at the paraxial part, and the image side surface of the fifth lens is concave at the paraxial part;

6.00≤f3/f≤7.00；

0.70≤f4/f≤1.00；

2.50≤R3/R4≤6.00；

1.20≤(R9+R10)/(R9-R10)≤5.00；

0.00＜R5/R6≤0.60。

2. the imaging optical lens of claim 1, wherein the fourth lens has an on-axis thickness of d7, an on-axis distance of the fourth lens image-side surface to the fifth lens object-side surface of d8, and the following relationship is satisfied:

1.20≤d7/d8≤2.50。

3. the imaging optical lens of claim 1, wherein the first lens has a focal length of f1, a radius of curvature of an object-side surface of the first lens is R1, a radius of curvature of an image-side surface of the first lens is R2, an on-axis thickness of the first lens is d1, and an optical total length of the imaging optical lens is TTL, and the following relationship is satisfied:

0.47≤f1/f≤1.63；

-3.36≤(R1+R2)/(R1-R2)≤-1.09；

0.05≤d1/TTL≤0.17。

4. the image-capturing optical lens of claim 1, wherein the second lens has a focal length f2, an on-axis thickness d3, and an optical total length TTL that satisfies the following relationship:

-4.45≤f2/f≤-1.20；

0.70≤(R3+R4)/(R3-R4)≤3.40；

0.01≤d3/TTL≤0.06。

5. a photographic optical lens according to claim 1, wherein the on-axis thickness of the third lens element is d5, the total optical length of the photographic optical lens is TTL, and the following relationship is satisfied:

-7.32≤(R5+R6)/(R5-R6)≤-0.81；

0.03≤d5/TTL≤0.12。

6. the image-capturing optical lens unit according to claim 1, wherein the radius of curvature of the object-side surface of the fourth lens element is R7, the radius of curvature of the image-side surface of the fourth lens element is R8, the on-axis thickness of the fourth lens element is d7, the total optical length of the image-capturing optical lens unit is TTL, and the following relationships are satisfied:

0.48≤(R7+R8)/(R7-R8)≤1.74；

0.06≤d7/TTL≤0.24。

7. the image-capturing optical lens of claim 1, wherein the focal length of the fifth lens element is f5, the on-axis thickness of the fifth lens element is d9, the total optical length of the image-capturing optical lens is TTL, and the following relationship is satisfied:

-2.76≤f5/f≤-0.36；

0.02≤d9/TTL≤0.12。

8. the imaging optical lens according to claim 1, wherein a field angle of the imaging optical lens is FOV, and satisfies the following relation:

FOV≥82.00°。

9. the imaging optical lens according to claim 1, wherein a combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied:

0.72≤f12/f≤3.02。

10. an image-capturing optical lens according to claim 1, characterized in that the F-number of the aperture of the image-capturing optical lens is Fno and satisfies the following relation:

Fno≤2.05。