WO2021127895A1 - Camera optical lens - Google Patents

Abstract

A camera optical lens (10, 20, 30, 40), comprising in order from the object side to the image side: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), and a sixth lens (L6), wherein the following relationships are satisfied: 5.00≤f1/f≤15.00; 3.00≤d9/d10≤10.00; 3.00≤(R1+R2)/(R1 -R2)≤20.00; and -3.50≤f4/f5≤-1.50. The camera optical lens has the good optical performance of a wide angle, ultra-thinness, and so on.

Description

Camera optical lens Technical field

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

Background technique

In recent years, with the rise of smart phones, the demand for miniaturized photographic lenses has increased. The photosensitive devices of general photographic lenses are nothing more than photosensitive coupled devices (CCD) or complementary metal oxide semiconductor devices (Complementary Metal). -Oxide Semiconductor Sensor, CMOS Sensor), and due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced, and the development trend of current electronic products with good functions, thin and short appearance, therefore, has The miniaturized camera lens with good image quality has become the mainstream in the current market. In order to obtain better imaging quality, the lenses traditionally mounted on mobile phone cameras mostly adopt a three-element or four-element lens structure. Moreover, with the development of technology and the increase of diversified needs of users, the pixel area of photosensitive devices is shrinking, and the system's requirements for image quality continue to increase, five-element, six-element, and seven-element lens structures Gradually appeared in the lens design. There is an urgent need for an ultra-thin wide-angle camera optical lens with excellent optical characteristics.

Summary of the invention

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

In order to solve the above technical problems, the embodiments of the present invention provide an imaging optical lens. The imaging optical lens includes in order from the object side to the image side: a first lens with positive refractive power, and a first lens with positive refractive power. Two lenses, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power;

The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the axial thickness of the fifth lens is d9, the on-axis distance from the image side surface of the fifth lens to the object side surface of the sixth lens is d10, the radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the first lens is R2, satisfies the following relationship:

5.00≤f1/f≤15.00;

3.00≤d9/d10≤10.00;

3.00≤(R1+R2)/(R1-R2)≤20.00;

-3.50≤f4/f5≤-1.50.

Preferably, the radius of curvature of the object side surface of the third lens is R5, and the radius of curvature of the image side surface of the third lens is R6, and the following relationship is satisfied:

R5/R6≥10.00.

Preferably, the axial thickness of the first lens is d1, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

0.03≤d1/TTL≤0.19.

Preferably, the focal length of the second lens is f2, the radius of curvature of the object side of the second lens is R3, the radius of curvature of the image side of the second lens is R4, and the on-axis thickness of the second lens is d3 , The total optical length of the camera optical lens is TTL, and satisfies the following relationship:

0.94≤f2/f≤4.06;

-7.33≤(R3+R4)/(R3-R4)≤-1.47;

0.03≤d3/TTL≤0.11.

Preferably, the focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, the radius of curvature of the image side of the third lens is R6, and the on-axis thickness of the third lens is d5 , The total optical length of the camera optical lens is TTL, and satisfies the following relationship:

1.05≤f3/f≤4.19;

0.53≤(R5+R6)/(R5-R6)≤1.83;

0.03≤d5/TTL≤0.11.

Preferably, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, the axial thickness of the fourth lens is d7, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

-4.29≤f4/f≤-1.05;

-0.49≤(R7+R8/(R7-R8)≤0.41;

0.03≤d7/TTL≤0.10.

Preferably, the radius of curvature of the object side of the fifth lens is R9, the radius of curvature of the image side of the fifth lens is R10, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

0.03≤f5/f≤1.58;

0.74≤(R9+R10)/(R9-R10)≤2.69;

0.10≤d9/TTL≤0.34.

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

-3.28≤f6/f≤-0.44;

0.82≤(R11+R12)/(R11-R12)≤5.24;

0.04≤d11/TTL≤0.16.

Preferably, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship:

0.79≤f12/f≤2.58.

Preferably, the aperture F number of the imaging optical lens is FNO, which satisfies the following relationship:

FNO≤1.76.

The beneficial effect of the present invention is that the imaging optical lens according to the present invention has excellent optical characteristics, meets the requirements of ultra-thin and wide-angle, and is especially suitable for mobile phone camera lens assemblies composed of high-pixel CCD, CMOS and other imaging elements. And WEB camera lens.

Description of the drawings

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

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

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

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

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

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

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

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

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

10 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 9;

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

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

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

FIG. 14 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 13;

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

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

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, a person of ordinary skill in the art can understand that, in each embodiment of the present invention, many technical details are proposed for the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed by the present invention can be realized.

(First embodiment)

With reference to the drawings, the present invention provides an imaging optical lens 10. FIG. 1 shows an imaging optical lens 10 according to a first embodiment of the present invention. The imaging optical lens 10 includes six lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: a first lens L1, an aperture S1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens. Lens L6. An optical element such as an optical filter GF may be provided between the sixth lens L6 and the image plane Si.

Define the focal length of the overall imaging optical lens 10 as f, the focal length of the first lens L1 is f1, 5.00≤f1/f≤15.00, which specifies the ratio of the focal length of the first lens L1 to the focal length of the imaging optical lens 10, which can be effective The spherical aberration and curvature of the ground balance system.

The on-axis thickness of the fifth lens L5 is defined as d9, the on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6 is d10, 3.00≤d9/d10≤10.00, which specifies The ratio of the thickness of the fifth lens L5 to the air space between the fifth lens L5 and the sixth lens L6, when within this range of conditions, helps to compress the total optical length and achieve an ultra-thinning effect.

Define the curvature radius of the object side surface of the first lens L1 as R1, and the curvature radius of the image side surface of the first lens L1 as R2, 3.00≤(R1+R2)/(R1-R2)≤20.00, which specifies the first lens The shape of L1, within this range of conditions, can ease the deflection of light passing through the lens and effectively reduce aberrations.

The focal length of the fourth lens L4 is defined as f4, the focal length of the fifth lens L5 is f5, -3.50≤f4/f5≤-1.50, the ratio of the focal lengths of the fourth lens L4 and the fifth lens L5 is specified, and the focal length is The reasonable distribution of the system makes the system have better imaging quality and lower sensitivity.

When the focal length of the imaging optical lens 10 of the present invention, the focal length of each lens, the on-axis distance from the image side of the related lens to the object side, the on-axis thickness, and the radius of curvature satisfy the above-mentioned relational expressions, a wide-angle with good optical performance can be provided. , Ultra-thin camera optical lens 10.

The curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the side surface of the third lens image L3 is R6, R5/R6≥10.00, which defines the shape of the third lens L3. With the development of ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view.

The axial thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens 10 is TTL, 0.03≦d1/TTL≦0.19, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d1/TTL≤0.15 is satisfied.

The focal length of the second lens L2 is f2, 0.94≦f2/f≦4.06. By controlling the positive refractive power of the second lens L2 in a reasonable range, it is beneficial to correct the aberration of the optical system. Preferably, 1.50≤f2/f≤3.25 is satisfied.

The curvature radius of the object side surface of the second lens L2 is R3, and the curvature radius of the image side surface of the second lens L2 is R4, -7.33≤(R3+R4)/(R3-R4)≤-1.47, which specifies the second When the shape of the lens L2 is within this range of conditions, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, -4.58≤(R3+R4)/(R3-R4)≤-1.84 is satisfied.

The on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, 0.03≤d3/TTL≤0.11, which is conducive to achieving ultra-thinness. Preferably, 0.06≤d3/TTL≤0.09 is satisfied.

The focal length of the third lens L3 is f3, 1.05≤f3/f≤4.19, and the reasonable distribution of optical power enables the system to have better imaging quality and lower sensitivity. Preferably, 1.68≤f3/f≤3.35 is satisfied.

The curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the image side surface of the third lens L3 is R6, 0.53≤(R5+R6)/(R5-R6)≤1.83, which can effectively control the third lens The shape of L3 is conducive to the molding of the third lens L3. When the condition is within this range, the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced. Preferably, 0.84≤(R5+R6)/(R5-R6)≤1.47 is satisfied.

The axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, 0.03≤d5/TTL≤0.11, which is beneficial to realize ultra-thinness. Preferably, 0.06≤d5/TTL≤0.09 is satisfied.

The focal length of the fourth lens L4 is f4, -4.29≤f4/f≤-1.05, which specifies the ratio of the focal length of the fourth lens to the focal length of the system, and helps to improve the performance of the optical system within the range of the conditional expression. Preferably, it satisfies -2.68≤f4/f≤-1.32.

The radius of curvature of the side surface of the fourth lens object L4 is R7, the radius of curvature of the side surface of the fourth lens image L4 is R8, -0.49≤(R7+R8/(R7-R8)≤0.41, the fourth lens is specified When the shape of L4 is within this range, with the development of ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view. Preferably, it satisfies -0.31≤(R7+R8/(R7-R8)≤ 0.33.

The axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, 0.03≤d7/TTL≤0.10, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d7/TTL≤0.08 is satisfied.

The focal length of the fifth lens L5 is f5, 0.03≤f5/f≤1.58, and the limitation of the fifth lens L5 can effectively make the light angle of the imaging lens smooth and reduce the tolerance sensitivity. Preferably, 0.48≤f5/f≤1.26 is satisfied.

The radius of curvature of the object side surface of the fifth lens L5 is R9, and the radius of curvature of the image side surface of the fifth lens L5 is R10, 0.74≤(R9+R10)/(R9-R10)≤2.69, and the fifth lens is specified When the shape of L5 is within this range, with the development of ultra-thin and wide-angle, it is conducive to correcting the aberration of the off-axis angle of view. Preferably, 1.18≤(R9+R10)/(R9-R10)≤2.15 is satisfied.

The axial thickness of the fifth lens L5 is d7, and the total optical length of the imaging optical lens 10 is TTL, 0.10≤d9/TTL≤0.34, which is beneficial to realize ultra-thinness. Preferably, 0.15≤d9/TTL≤0.28 is satisfied.

The focal length of the sixth lens L6 is f6, -3.28≤f6/f≤-0.44, and the reasonable distribution of the optical power enables the system to have better imaging quality and lower sensitivity. Preferably, -2.05≤f6/f≤-0.55 is satisfied.

The radius of curvature of the object side surface of the sixth lens L6 is R11, and the radius of curvature of the image side surface of the sixth lens L6 is R12, 0.82≤(R11+R12)/(R11-R12)≤5.24, and the sixth lens is specified The shape of L6, within this range of conditions, will help to correct problems such as off-axis angle aberration as the ultra-thin and wide-angle advances. Preferably, 1.31≤(R11+R12)/(R11-R12)≤4.19 is satisfied.

The on-axis thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, 0.04≤d11/TTL≤0.16, which is beneficial to realize ultra-thinness. Preferably, 0.06≤d11/TTL≤0.13 is satisfied.

In this embodiment, the combined focal length of the first lens L1 and the second lens L2 is defined as f12, which satisfies the following relationship: 0.79≤f12/f≤2.58. When this condition is within the range, the camera can be eliminated. The aberration and distortion of the optical lens 10 can suppress the back focal length of the imaging optical lens 10 and maintain the miniaturization of the image lens system group. Preferably, it satisfies 1.26≤f12/f≤2.06.

In this embodiment, the aperture F number of the imaging optical lens 10 is less than or equal to 1.76. Large aperture, good imaging performance. Preferably, the aperture F number is less than or equal to 1.73.

In this embodiment, the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.13 mm, which is beneficial to realize ultra-thinness. Preferably, the total optical length TTL is less than or equal to 6.80 mm.

With such a design, the overall optical length TTL of the overall imaging optical lens 10 can be shortened as much as possible, and the characteristics of miniaturization can be maintained.

The imaging optical lens 10 of the present invention will be described below with an example. The symbols described in each example are as follows. The unit of focal length, distance on axis, radius of curvature, thickness on axis, position of inflection point, and position of stagnation point is mm.

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

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

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

【Table 1】

Among them, the meaning of each symbol is as follows.

S1: aperture;

R: The radius of curvature of the optical surface, and the radius of curvature of the center of the lens;

R1: the radius of curvature of the object side surface of the first lens L1;

R2: the radius of curvature of the image side surface of the first lens L1;

R3: the radius of curvature of the object side surface of the second lens L2;

R4: the radius of curvature of the image side surface of the second lens L2;

R5: the radius of curvature of the object side surface of the third lens L3;

R6: the radius of curvature of the image side surface of the third lens L3;

R7: the radius of curvature of the object side of the fourth lens L4;

R8: the radius of curvature of the image side surface of the fourth lens L4;

R9: the radius of curvature of the object side surface of the fifth lens L5;

R10: the radius of curvature of the image side surface of the fifth lens L5;

R11: the radius of curvature of the object side surface of the sixth lens L6;

R12: the radius of curvature of the image side surface of the sixth lens L6;

R13: the radius of curvature of the object side surface of the optical filter GF;

R14: the radius of curvature of the image side surface of the optical filter GF;

d: the on-axis thickness of the lens and the on-axis distance between the lenses;

d0: the on-axis distance from the aperture S1 to the object side of the first lens L1;

d1: the on-axis thickness of the first lens L1;

d2: the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: the on-axis thickness of the second lens L2;

d4: the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: the on-axis thickness of the third lens L3;

d6: the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: the on-axis thickness of the fourth lens L4;

d8: the on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: the on-axis thickness of the fifth lens L5;

d10: the on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: the on-axis thickness of the sixth lens L6;

d12: the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the optical filter GF;

d13: the axial thickness of the optical filter GF;

d14: the on-axis distance from the image side surface of the optical filter GF to the image surface;

nd: refractive index of d-line;

nd1: the refractive index of the d-line of the first lens L1;

nd2: the refractive index of the d-line of the second lens L2;

nd3: the refractive index of the d-line of the third lens L3;

nd4: the refractive index of the d-line of the fourth lens L4;

nd5: the refractive index of the d-line of the fifth lens L5;

nd6: the refractive index of the d-line of the sixth lens L6;

ndg: the refractive index of the d-line of the optical filter GF;

vd: Abbe number;

v1: Abbe number of the first lens L1;

v2: Abbe number of the second lens L2;

v3: Abbe number of the third lens L3;

v4: Abbe number of the fourth lens L4;

v5: Abbe number of the fifth lens L5;

v6: Abbe number of the sixth lens L6;

vg: Abbe number of optical filter GF.

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

【Table 2】

Among them, k is the conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients.

IH: Image height

y=(x ² /R)/[1+{1-(k+1)(x ² /R ² )} ^1/2 ]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰ +A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰ (1)

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

Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 of the first embodiment of the present invention. Among them, P1R1 and P1R2 represent the object side and image side of the first lens L1 respectively, P2R1 and P2R2 represent the object side and image side of the second lens L2 respectively, and P3R1 and P3R2 represent the object side and image side of the third lens L3 respectively. P4R1, P4R2 represent the object side and image side of the fourth lens L4, P5R1, P5R2 represent the object side and the image side of the fifth lens L5, and P6R1, P6R2 represent the object side and the image side of the sixth lens L6, respectively. The corresponding data in the “reflection point position” column is the vertical distance from the reflex point set on the surface of each lens to the optical axis of the imaging optical lens 10. The data corresponding to the “stationary point position” column is the vertical distance from the stationary point set on the surface of each lens to the optical axis of the imaging optical lens 10.

【table 3】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	1	0.765	To	To
P1R2	1	0.625	To	To
P2R1	To	To	To	To
P2R2	To	To	To	To
P3R1	1	1.125	To	To
P3R2	1	1.255	To	To
P4R1	To	To	To	To
P4R2	2	0.325	1.235	To
P5R1	3	1.065	1.545	1.595

P5R2	2	1.335	1.895	To
P6R1	3	0.415	2.005	2.775
P6R2	1	0.725	To	To

【Table 4】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	1	1.385	To
P1R2	1	1.145	To
P2R1	To	To	To
P2R2	To	To	To
P3R1	To	To	To
P3R2	To	To	To
P4R1	To	To	To
P4R2	2	0.575	1.475
P5R1	1	1.625	To
P5R2	To	To	To
P6R1	1	0.865	To
P6R2	1	2.095	To

2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm pass through the imaging optical lens 10 of the first embodiment. Fig. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 10 of the first embodiment. The field curvature S in Fig. 4 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction. song.

The following Table 17 shows the values corresponding to the various numerical values in each of Examples 1, 2, 3, and 4 and the parameters specified in the conditional expressions.

As shown in Table 17, the first embodiment satisfies each conditional expression.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 2.115mm, the full-field image height is 4.000mm, and the diagonal field angle is 95.00°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

(Second embodiment)

The second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.

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

【table 5】

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

【Table 6】

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

【Table 7】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	2	0.755	2.075	To
P1R2	1	0.615	To	To
P2R1	To	To	To	To
P2R2	To	To	To	To
P3R1	1	1.075	To	To
P3R2	1	1.185	To	To
P4R1	To	To	To	To
P4R2	2	0.325	1.195	To
P5R1	2	1.025	1.645	To
P5R2	2	1.355	1.955	To
P6R1	3	0.415	1.985	2.695
P6R2	1	0.735	To	To

【Table 8】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	1	1.415	To
P1R2	1	1.135	To
P2R1	To	To	To
P2R2	To	To	To
P3R1	To	To	To
P3R2	To	To	To
P4R1	To	To	To
P4R2	2	0.575	1.455
P5R1	1	1.445	To
P5R2	To	To	To
P6R1	1	0.815	To
P6R2	1	2.135	To

6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm pass through the imaging optical lens 20 of the second embodiment. FIG. 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 20 of the second embodiment.

As shown in Table 17, the second embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 2.113mm, the full-field image height is 4.000mm, the diagonal field angle is 95.00°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

(Third embodiment)

The third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.

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

【Table 9】

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

【Table 10】

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

【Table 11】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	1	0.745	To	To
P1R2	1	0.505	To	To
P2R1	To	To	To	To
P2R2	To	To	To	To
P3R1	1	1.045	To	To
P3R2	1	1.145	To	To
P4R1	To	To	To	To
P4R2	2	0.305	1.215	To
P5R1	2	1.025	1.565	To
P5R2	2	1.305	1.865	To
P6R1	3	0.455	2.075	2.805
P6R2	3	0.705	3.095	3.345

【Table 12】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	1	1.325	To
P1R2	1	0.975	To
P2R1	To	To	To
P2R2	To	To	To
P3R1	To	To	To
P3R2	To	To	To
P4R1	To	To	To
P4R2	2	0.515	1.465
P5R1	1	1.425	To
P5R2	To	To	To
P6R1	1	0.955	To
P6R2	1	2.035	To

10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm passes through the imaging optical lens 30 of the third embodiment. FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 30 of the third embodiment.

As shown in Table 17, the third embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 2.091mm, the full-field image height is 4.000mm, the diagonal field angle is 95.00°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

(Fourth embodiment)

The fourth embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.

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

【Table 13】

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

【Table 14】

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

【Table 15】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	2	0.755	2.075	To
P1R2	1	0.615	To	To
P2R1	To	To	To	To
P2R2	To	To	To	To
P3R1	1	1.075	To	To
P3R2	1	1.185	To	To
P4R1	To	To	To	To
P4R2	2	0.325	1.195	To
P5R1	2	1.025	1.645	To
P5R2	2	1.355	1.955	To
P6R1	3	0.415	1.985	2.695
P6R2	1	0.735	To	To

【Table 16】

14 and 15 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm pass through the imaging optical lens 40 of the fourth embodiment. FIG. 16 shows a schematic diagram of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 40 of the fourth embodiment.

The following Table 17 lists the numerical values corresponding to each conditional expression in this embodiment according to the above-mentioned conditional expressions. Obviously, the imaging optical system of this embodiment satisfies the above-mentioned conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 2.113mm, the full-field image height is 4.000mm, and the diagonal field angle is 95.00°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

【Table 17】

Parameters and conditions	Example 1	Example 2	Example 3	Example 4
f1/f	8.63	14.99	5.01	12.76
d9/d10	5.26	9.97	3.01	5.08
(R1+R2)/(R1-R2)	11.99	19.97	3.00	19.49
f4/f5	-2.41	-3.50	-2.70	-1.50
R5/R6	40.98	10.01	18.89	10.63
f	3.617	3.613	3.575	3.602
f1	31.214	54.157	17.893	45.976
f2	7.543	6.757	9.687	6.747
f3	8.810	9.052	9.993	7.563
f4	-7.005	-7.538	-7.665	-5.684
f5	2.905	2.155	2.838	3.789
f6	-3.623	-2.376	-3.683	-5.909
f12	5.935	5.847	6.140	5.693
Fno	1.71	1.71	1.71	1.71

Among them, Fno: aperture F number.

A person of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present invention, and in practical applications, various changes can be made to them in form and details without departing from the spirit and spirit of the present invention. range.

Claims (10)

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

   The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the axial thickness of the fifth lens is d9, the on-axis distance from the image side surface of the fifth lens to the object side surface of the sixth lens is d10, the radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the first lens is R2, satisfies the following relationship:

   5.00≤f1/f≤15.00;

   3.00≤d9/d10≤10.00;

   3.00≤(R1+R2)/(R1-R2)≤20.00;

   -3.50≤f4/f5≤-1.50.
2. The imaging optical lens of claim 1, wherein 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, and the following relationship is satisfied:

   R5/R6≥10.00.
3. The imaging optical lens of claim 1, wherein the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   0.03≤d1/TTL≤0.19.
4. The imaging optical lens according to claim 1, wherein the focal length of the second lens is f2, the radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side of the second lens is R4 , The axial thickness of the second lens is d3, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   0.94≤f2/f≤4.06;

   -7.33≤(R3+R4)/(R3-R4)≤-1.47;

   0.03≤d3/TTL≤0.11.
5. The imaging optical lens of claim 1, wherein the focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, and the radius of curvature of the image side of the third lens is R6. , The axial thickness of the third lens is d5, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   1.05≤f3/f≤4.19;

   0.53≤(R5+R6)/(R5-R6)≤1.83;

   0.03≤d5/TTL≤0.11.
6. The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, and the on-axis thickness of the fourth lens Is d7, the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

   -4.29≤f4/f≤-1.05;

   -0.49≤(R7+R8/(R7-R8)≤0.41;

   0.03≤d7/TTL≤0.10.
7. The imaging optical lens of claim 1, wherein the radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

   0.03≤f5/f≤1.58;

   0.74≤(R9+R10)/(R9-R10)≤2.69;

   0.10≤d9/TTL≤0.34.
8. The imaging optical lens of claim 1, wherein the focal length of the sixth lens is f6, the radius of curvature of the object side of the sixth lens is R11, and the radius of curvature of the image side of the sixth lens is R12 , The on-axis thickness of the sixth lens is d11, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   -3.28≤f6/f≤-0.44;

   0.82≤(R11+R12)/(R11-R12)≤5.24;

   0.04≤d11/TTL≤0.16.
9. The imaging optical lens of claim 1, wherein the combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied:

   0.79≤f12/f≤2.58.
10. The imaging optical lens of claim 1, wherein the aperture F number of the imaging optical lens is FNO, which satisfies the following relationship:

    FNO≤1.76.

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