WO2021127879A1 - Camera optical lens - Google Patents

Abstract

Disclosed is a camera optimal lens, sequentially containing, from an object side to an image side: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7), and an eighth lens (L8), wherein the focal length of the camera optical lens (10) is f, the focal length of the first lens (L1) is f1, the focal length of the second lens (L2) is f2, the radius of curvature of the object side surface of the fifth lens (L5) is R9, the radius of curvature of the image side surface of the fifth lens (L5) is R10, the on-axis thickness of the fourth lens (L4) is d7, and the on-axis distance from the image side surface of the fourth lens (L4) to the object side surface of the fifth lens (L5) is d8, which satisfy the following relational expressions: 0.92 ≤ f1/f ≤ 1.90; f2 ≤ 0; -0.90 ≤ (R9 + R10)/(R9 - R10) ≤ -0.10; and 2.50 ≤ d7/d8 ≤ 20.00. The camera optical lens (10) has a large aperture, a wide angle, ultra-thinness, etc., and has a good optical performance.

Description

Camera optical lens Technical field

This application relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as camera 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 in diversified needs of users, as the pixel area of photosensitive devices continues to shrink and the system's requirements for image quality continue to increase, five-chip, six-chip, seven-chip, and eight-chip The chip lens structure gradually appeared in lens design. There is an urgent need for an ultra-thin wide-angle camera optical lens with excellent optical characteristics.

Application content

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

In order to solve the above technical problems, the embodiments of the present application provide an imaging optical lens. The imaging optical lens includes a first lens, a second lens, a third lens, and a fourth lens in order from the object side to the image side. , The fifth lens, the sixth lens, the seventh lens and the eighth lens;

The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the radius of curvature of the object side surface of the fifth lens is R9, and the fifth lens image side The radius of curvature of is R10, the on-axis thickness of the fourth lens is d7, the on-axis distance from the image side of the fourth lens to the object side of the fifth lens is d8, and the following relationship is satisfied:

0.92≤f1/f≤1.90;

f2≤0;

-0.90≤(R9+R10)/(R9-R10)≤-0.10;

2.50≤d7/d8≤20.00.

Preferably, the radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, and the following relationship is satisfied:

5.00≤(R3+R4)/(R3-R4)≤15.00.

Preferably, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the image side surface of the first lens is R2, the axial thickness of the first lens is d1, and the total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

-9.90≤(R1+R2)/(R1-R2)≤-1.71;

0.03≤d1/TTL≤0.11.

Preferably, 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:

-11.38≤f2/f≤-1.64;

0.01≤d3/TTL≤0.03.

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:

0.57≤f3/f≤2.39;

-4.45≤(R5+R6)/(R5-R6)≤-1.00;

0.03≤d5/TTL≤0.11.

Preferably, the focal length of the fourth lens is f4, the radius of curvature of the object side of the fourth lens is R7, the radius of curvature of the image side of the fourth lens is R8, and the total optical length of the imaging optical lens is TTL, And satisfy the following relationship:

0.74≤f4/f≤2.89;

0.49≤(R7+R8)/(R7-R8)≤2.17;

0.02≤d7/TTL≤0.08.

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

-3.68≤f5/f≤-1.13;

0.01≤d9/TTL≤0.03.

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:

-69.77≤f6/f≤105.26;

-632.63≤(R11+R12)/(R11-R12)≤-7.91;

0.05≤d11/TTL≤0.16.

Preferably, the focal length of the seventh lens is f7, the radius of curvature of the object side of the seventh lens is R13, the radius of curvature of the image side of the seventh lens is R14, and the on-axis thickness of the seventh lens is d13. , The total optical length of the camera optical lens is TTL, and satisfies the following relationship:

2.79≤f7/f≤11.73;

-16.18≤(R13+R14)/(R13-R14)≤-3.72;

0.07≤d13/TTL≤0.23.

Preferably, the focal length of the eighth lens is f8, the radius of curvature of the object side of the eighth lens is R15, the radius of curvature of the image side of the eighth lens is R16, and the on-axis thickness of the eighth lens is d15 , The total optical length of the camera optical lens is TTL, and satisfies the following relationship:

-1.85≤f8/f≤-0.61;

0.46≤(R15+R16)/(R15-R16)≤1.42;

0.04≤d15/TTL≤0.13.

The beneficial effects of the present application are: the imaging optical lens according to the present application has excellent optical characteristics, meets the requirements of large aperture, ultra-thin and wide-angle, and is especially suitable for mobile phones composed of high-pixel CCD, CMOS and other imaging elements Camera lens assembly 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 application;

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 application;

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;

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

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.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the various embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present application, many technical details are proposed in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in this application can be realized.

(First embodiment)

With reference to the drawings, the present application provides an imaging optical lens 10. FIG. 1 shows an imaging optical lens 10 according to the first embodiment of the application. The imaging optical lens 10 includes eight lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens. Lens L6, seventh lens L7, and eighth lens L8. An optical element such as an optical filter GF may be provided between the eighth lens L8 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, 0.92≤f1/f≤1.90, which specifies the ratio of the focal length of the first lens L1 to the total focal length of the system, which can effectively balance the spherical aberration of the system And the amount of field curvature. Preferably, 1.04≤f1/f≤1.88 is satisfied.

The focal length of the second lens L2 is defined as f2, f2≤0, which specifies the positive and negative of the focal length of the second lens L2, and the reasonable allocation of the focal length enables the system to have better imaging quality and lower sensitivity.

Define the radius of curvature of the object side surface of the fifth lens L5 as R9, and the radius of curvature of the image side surface of the fifth lens L5 as R10, -0.90≤(R9+R10)/(R9-R10)≤-0.10, which defines the fifth lens L5 The shape, within the range specified by the conditional formula, can ease the deflection of light passing through the lens and effectively reduce aberrations. Preferably, -0.88≤(R9+R10)/(R9-R10)≤-0.11 is satisfied.

The on-axis thickness of the fourth lens L4 is defined as d7, and the on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 is d8, 2.50≤d7/d8≤20.00, and the thickness of the fourth lens L4 is defined as The ratio of the air space between the fourth lens L4 and the fifth lens L5 helps to compress the total length of the optical system within the range of the conditional expression, and realizes an ultra-thinning effect. Preferably, it satisfies 2.71≤d7/d8≤19.81.

Define the curvature radius of the object side surface of the second lens L2 as R3, and the curvature radius of the image side surface of the second lens L2 as R4, 5.00≤(R3+R4)/(R3-R4)≤15.00, which defines the shape of the second lens L2, Within the specified range of the conditional formula, the degree of deflection of the light passing through the lens can be relaxed, and aberrations can be effectively reduced. Preferably, 5.24≤(R3+R4)/(R3-R4)≤14.54 is satisfied.

When the focal length of the imaging optical lens 10 of the present application, the focal length of each lens, the on-axis distance from the image side of the relevant lens to the object side, and the on-axis thickness satisfy the above relationship, the imaging optical lens 10 can be made to have high performance and meet low TTL. Design requirements.

The curvature radius R1 of the object side surface of the first lens L1 and the curvature radius R2 of the image side surface of the first lens L1 satisfy the following relationship: -9.90≤(R1+R2)/(R1-R2)≤-1.71, reasonable control of the first lens The shape of L1 enables the first lens L1 to effectively correct the spherical aberration of the system. Preferably, -6.18≤(R1+R2)/(R1-R2)≤-2.14 is satisfied.

The on-axis thickness of the first lens L1 is d1, which satisfies the following relationship: 0.03≤d1/TTL≤0.11, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d1/TTL≤0.09 is satisfied.

The focal length of the second lens L2 is f2, which satisfies the following relationship: -11.38≤f2/f≤-1.64. By controlling the negative refractive power of the second lens L2 in a reasonable range, it is beneficial to correct the aberration of the optical system. Preferably, it satisfies -7.11≤f2/f≤-2.05.

The on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.01≤d3/TTL≤0.03, which is conducive to achieving ultra-thinness. Preferably, 0.02≤d3/TTL≤0.03 is satisfied.

The focal length of the third lens L3 is f3, which satisfies the following relational expression: 0.57≤f3/f≤2.39. The reasonable distribution of optical power enables the system to have better imaging quality and lower sensitivity. Preferably, 0.90≤f3/f≤1.91 is satisfied.

The curvature radius R5 of the object side surface of the third lens L3 and the curvature radius R6 of the image side surface of the third lens L3 satisfy the following relationship: -4.45≤(R5+R6)/(R5-R6)≤-1.00, which can effectively control the third lens The shape of the lens L3 is conducive to the molding of the third lens L3. Within the specified range of the conditional formula, the degree of deflection of the light passing through the lens can be reduced, and aberrations can be effectively reduced. Preferably, it satisfies -2.78≤(R5+R6)/(R5-R6)≤-1.25.

The on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.03≤d5/TTL≤0.11, which is beneficial to realize ultra-thinness. Preferably, 0.05≤d5/TTL≤0.09 is satisfied.

The focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.74≤f4/f≤2.89. The reasonable distribution of the optical power enables the system to have better imaging quality and lower sensitivity. Preferably, 1.18≤f4/f≤2.32 is satisfied.

The curvature radius of the object side surface of the fourth lens L4 is R7, and the curvature radius of the image side surface of the fourth lens L4 is R8, which satisfies the following relationship: 0.49≤(R7+R8)/(R7-R8)≤2.17, and the fourth lens is specified When the shape of the lens L4 is within the 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, 0.78≤(R7+R8)/(R7-R8)≤1.74 is satisfied.

The on-axis thickness d7 of the fourth lens L4 also satisfies the following relationship: 0.02≤d7/TTL≤0.08, which is conducive to achieving ultra-thinness. Preferably, 0.03≤d7/TTL≤0.06 is satisfied.

The focal length of the fifth lens L5 is f5, which satisfies the following relationship: -3.68≤f5/f≤-1.13. The limitation of the fifth lens L5 can effectively smooth the light angle of the imaging lens and reduce the tolerance sensitivity. Preferably, it satisfies -2.30≤f5/f≤-1.41.

The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.01≤d9/TTL≤0.03, which is beneficial to realize ultra-thinness. Preferably, 0.02≤d9/TTL≤0.03 is satisfied.

The focal length of the sixth lens L6 is f6, which satisfies the following relationship: -69.77≤f6/f≤105.26. The reasonable distribution of the optical power enables the system to have better imaging quality and lower sensitivity. Preferably, -43.61≤f6/f≤84.21.

The curvature radius R11 of the object side surface of the sixth lens L6 and the curvature radius R12 of the image side surface of the sixth lens L6 satisfy the following relationship: -632.63≤(R11+R12)/(R11-R12)≤-7.91, when the conditions are within the 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 -395.40≤(R11+R12)/(R11-R12)≤-9.89.

The on-axis thickness of the sixth lens L6 is d11, which satisfies the following relationship: 0.05≤d11/TTL≤0.16, which is beneficial to realize ultra-thinness. Preferably, 0.07≤d11/TTL≤0.13 is satisfied.

The focal length of the seventh lens L7 is f7, which satisfies the following relationship: 2.79≤f7/f≤11.73. The reasonable distribution of optical power enables the system to have better imaging quality and lower sensitivity. Preferably, 4.47≤f7/f≤9.38 is satisfied.

The curvature radius R13 of the object side surface of the seventh lens L7 and the curvature radius R14 of the image side surface of the seventh lens L7 satisfy the following relationship: -16.18≤(R13+R14)/(R13-R14)≤-3.72, the seventh lens is specified When the shape of the lens L7 is within the range of conditions, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, -10.12≤(R13+R14)/(R13-R14)≤-4.65 is satisfied.

The on-axis thickness of the seventh lens L7 is d13, which satisfies the following relationship: 0.07≤d13/TTL≤0.23, which is beneficial to realize ultra-thinness. Preferably, 0.12≤d13/TTL≤0.18 is satisfied.

The focal length of the eighth lens L8 is f8, which satisfies the following relationship: -1.85≤f8/f≤-0.61. The reasonable distribution of the optical power enables the system to have better imaging quality and lower sensitivity. Preferably, -1.16≤f8/f≤-0.76 is satisfied.

The curvature radius R15 of the object side surface of the eighth lens L8 and the curvature radius R16 of the image side surface of the eighth lens L8 satisfy the following relationship: 0.46≤(R15+R16)/(R15-R16)≤1.42, and the eighth lens L8 is specified When the shape is within the range of conditions, with the development of ultra-thin and wide-angle, it is helpful to correct the aberration of the off-axis angle of view. Preferably, 0.74≤(R15+R16)/(R15-R16)≤1.14 is satisfied.

The on-axis thickness of the eighth lens L8 is d15, which satisfies the following relationship: 0.04≤d15/TTL≤0.13, which is beneficial to realize ultra-thinness. Preferably, 0.07≤d15/TTL≤0.10 is satisfied.

In this embodiment, the ratio TTL/IH of the total optical length TTL of the imaging optical lens 10 to the image height of the imaging optical lens 10 is less than or equal to 1.46, which is conducive to achieving ultra-thinness.

In this embodiment, the angle of view FOV of the imaging optical lens 10 in the diagonal direction is greater than or equal to 76.00°, which is beneficial to realize a wide angle.

In this embodiment, the aperture F number Fno of the imaging optical lens 10 is less than or equal to 1.91, the aperture is large, and the imaging performance is good.

With such a design, the camera optical lens 10 can not only have good optical imaging performance, but also meet the design requirements of large aperture, wide-angle, and ultra-thinness.

The imaging optical lens 10 of the present application 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 of the first embodiment of the present application.

【Table 1】

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

S1: aperture;

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

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

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

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

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

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

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

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

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

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

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

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

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

R13: the radius of curvature of the object side surface of the seventh lens L7;

R14: the radius of curvature of the image side surface of the seventh lens L7;

R15: the radius of curvature of the object side of the eighth lens L8;

R16: the radius of curvature of the image side surface of the eighth lens L8;

R17: the radius of curvature of the object side of the optical filter GF;

R18: the radius of curvature of the image side surface of the optical filter GF;

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

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

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

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

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

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

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

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

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

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

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

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

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

d12: the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

d13: the on-axis thickness of the seventh lens L7;

d14: the on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the eighth lens L8;

d15: the on-axis thickness of the eighth lens L8;

d16: the on-axis distance from the image side surface of the eighth lens L8 to the object side surface of the optical filter GF;

d17: the axial thickness of the optical filter GF;

d18: the on-axis distance from the image side surface of the optical filter GF to the image surface;

nd: refractive index of d-line;

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

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

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

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

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

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

nd7: the refractive index of the d-line of the seventh lens L7;

nd8: the refractive index of the d-line of the eighth lens L8;

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

vd: Abbe number;

v1: Abbe number of the first lens L1;

v2: Abbe number of the second lens L2;

v3: Abbe number of the third lens L3;

v4: Abbe number of the fourth lens L4;

v5: Abbe number of the fifth lens L5;

v6: Abbe number of the sixth lens L6;

v7: Abbe number of the seventh lens L7;

v8: Abbe number of the eighth lens L8;

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 application.

【Table 2】

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

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

For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1). However, this application 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 application. Among them, P1R1 and P1R2 represent the object side and image side of the first lens L1 respectively, P2R1 and P2R2 represent the object side and image side of the second lens L2 respectively, and P3R1 and P3R2 represent the object side and image side of the third lens L3 respectively. P4R1, P4R2 represent the object side and image side of the fourth lens L4, P5R1, P5R2 represent the object side and image side of the fifth lens L5, P6R1, P6R2 represent the object side and image side of the sixth lens L6, P7R1 P7R2 represents the object side and image side of the seventh lens L7, respectively, and P8R1 and P8R2 represent the object side and the image side of the eighth lens L8, 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】

【Table 4】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	0	To	To
P2R2	0	To	To
P3R1	0	To	To
P3R2	1	1.675	To
P4R1	1	2.255	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	2	0.615	2.505
P6R1	0	To	To
P6R2	0	To	To
P7R1	2	1.485	3.805
P7R2	1	2.025	To
P8R1	0	To	To
P8R2	1	2.615	To

2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm pass through the imaging optical lens 10 of the first embodiment. FIG. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 10 of the first embodiment. The field curvature S in FIG. 4 is the field curvature in the sagittal direction, and T is the field curvature in the meridian direction. song.

The following Table 13 shows the values corresponding to the various values in each of Examples 1, 2, and 3 and the parameters that have been specified in the conditional expressions.

As shown in Table 13, the first embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 5.152mm, the full-field image height is 8.000mm, the diagonal field angle is 78.00°, 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 application.

【table 5】

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

【Table 6】

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

【Table 7】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	0	To	To	To
P1R2	0	To	To	To
P2R1	2	1.575	1.795	To
P2R2	3	1.535	1.835	2.395
P3R1	1	1.785	To	To
P3R2	1	1.135	To	To
P4R1	3	0.245	1.835	2.295
P4R2	0	To	To	To
P5R1	0	To	To	To
P5R2	2	0.475	1.985	To
P6R1	0	To	To	To
P6R2	1	3.165	To	To
P7R1	1	0.825	To	To
P7R2	1	1.175	To	To
P8R1	1	5.005	To	To
P8R2	1	1.305	To	To

【Table 8】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	0	To	To
P2R2	0	To	To
P3R1	0	To	To
P3R2	1	1.775	To
P4R1	1	0.415	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	2	0.865	2.385
P6R1	0	To	To
P6R2	0	To	To
P7R1	1	1.455	To
P7R2	1	2.005	To
P8R1	0	To	To
P8R2	1	2.945	To

6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm pass through the imaging optical lens 20 of the second embodiment. FIG. 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 20 of the second embodiment.

As shown in Table 13, the second embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 5.087mm, the full-field image height is 8.000mm, the diagonal field angle is 78.80°, 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 the design data of the imaging optical lens 30 of the third embodiment of the present application.

【Table 9】

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

【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 application.

【Table 11】

To	Number of recurve points	Recurve point position 1	Recurve point position 2	Recurve point position 3
P1R1	0	To	To	To
P1R2	0	To	To	To
P2R1	0	To	To	To
P2R2	0	To	To	To
P3R1	0	To	To	To
P3R2	1	1.185	To	To
P4R1	0	To	To	To
P4R2	2	1.945	2.075	To
P5R1	0	To	To	To
P5R2	2	0.265	2.115	To
P6R1	0	To	To	To
P6R2	1	3.205	To	To
P7R1	2	0.815	3.715	To
P7R2	2	1.135	5.125	To
P8R1	3	4.105	4.425	4.715
P8R2	2	1.205	6.185	To

【Table 12】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	0	To	To
P2R1	0	To	To
P2R2	0	To	To
P3R1	0	To	To
P3R2	1	2.005	To
P4R1	0	To	To
P4R2	0	To	To
P5R1	0	To	To
P5R2	2	0.445	2.555
P6R1	0	To	To
P6R2	0	To	To
P7R1	1	1.435	To
P7R2	1	1.975	To
P8R1	0	To	To
P8R2	1	2.645	To

10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm pass through the imaging optical lens 30 of the third embodiment. FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 30 of the third embodiment.

The following Table 13 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 5.249mm, the full-field image height is 8.000mm, the diagonal field angle is 76.30°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

【Table 13】

Parameters and conditions	Example 1	Example 2	Example 3
f1/f	1.74	1.85	1.15
f2	-30.69	-55.00	-24.57
(R9+R10)/(R9-R10)	-0.58	-0.12	-0.86
d7/d8	2.92	19.63	4.17
f	9.788	9.666	9.972
f1	17.030	17.882	11.489
f3	11.062	13.575	15.892
f4	18.887	14.224	18.133
f5	-18.021	-16.363	-17.626
f6	-341.445	-124.764	699.765
f7	64.708	53.990	77.965
f8	-9.072	-8.928	-9.093
f12	32.394	24.477	19.030
Fno	1.90	1.90	1.90

In Table 13, f12 is the combined focal length of the first lens L1 and the second lens L2.

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the application, and in actual applications, various changes can be made to them in form and details without departing from the spirit and spirit of the application. 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, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, The seventh lens and the eighth lens;

   The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the radius of curvature of the object side surface of the fifth lens is R9, and the fifth lens image side The radius of curvature of is R10, the on-axis thickness of the fourth lens is d7, the on-axis distance from the image side of the fourth lens to the object side of the fifth lens is d8, and the following relationship is satisfied:

   0.92≤f1/f≤1.90;

   f2≤0;

   -0.90≤(R9+R10)/(R9-R10)≤-0.10;

   2.50≤d7/d8≤20.00.
2. The imaging optical lens of claim 1, wherein the curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface of the second lens is R4, and the following relationship is satisfied:

   5.00≤(R3+R4)/(R3-R4)≤15.00.
3. The imaging optical lens of claim 1, wherein 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, and the on-axis thickness of the first lens Is d1, the total optical length of the camera optical lens is TTL, and satisfies the following relationship:

   -9.90≤(R1+R2)/(R1-R2)≤-1.71;

   0.03≤d1/TTL≤0.11.
4. The imaging optical lens of claim 1, wherein the on-axis thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   -11.38≤f2/f≤-1.64;

   0.01≤d3/TTL≤0.03.
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:

   0.57≤f3/f≤2.39;

   -4.45≤(R5+R6)/(R5-R6)≤-1.00;

   0.03≤d5/TTL≤0.11.
6. The imaging optical lens of claim 1, wherein the focal length of the fourth lens is f4, the radius of curvature of the object side of the fourth lens is R7, and the radius of curvature of the image side of the fourth lens is R8. , The total optical length of the camera optical lens is TTL, and satisfies the following relationship:

   0.74≤f4/f≤2.89;

   0.49≤(R7+R8)/(R7-R8)≤2.17;

   0.02≤d7/TTL≤0.08.
7. The imaging optical lens of claim 1, wherein the focal length of the fifth lens is f5, the axial thickness of the fifth lens is d9, and the total optical length of the imaging optical lens is TTL, and satisfies The following relationship:

   -3.68≤f5/f≤-1.13;

   0.01≤d9/TTL≤0.03.
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:

   -69.77≤f6/f≤105.26;

   -632.63≤(R11+R12)/(R11-R12)≤-7.91;

   0.05≤d11/TTL≤0.16.
9. The imaging optical lens of claim 1, wherein the focal length of the seventh lens is f7, the radius of curvature of the object side of the seventh lens is R13, and the radius of curvature of the image side of the seventh lens is R14 , The axial thickness of the seventh lens is d13, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   2.79≤f7/f≤11.73;

   -16.18≤(R13+R14)/(R13-R14)≤-3.72;

   0.07≤d13/TTL≤0.23.
10. The imaging optical lens of claim 1, wherein the focal length of the eighth lens is f8, the radius of curvature of the object side of the eighth lens is R15, and the radius of curvature of the image side of the eighth lens is R16. , The axial thickness of the eighth lens is d15, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

    -1.85≤f8/f≤-0.61;

    0.46≤(R15+R16)/(R15-R16)≤1.42;

    0.04≤d15/TTL≤0.13.

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