WO2021127861A1 - Image pickup optical camera - Google Patents

Abstract

An image pickup optical camera (10), relating to the field of optical cameras. From an object side to an image side, the image pickup optical camera (10) sequentially comprises a first lens (L1) having positive refractive power, a second lens (L2) having positive refractive power, a third lens (L3) having positive refractive power, and a fourth lens (L4) having negative refractive power. The following relational expressions are satisfied: 2.50≤f1/f≤5.00, -10.00≤(R3+R4)/(R3-R4)≤-3.00, 0.70≤f3/f≤1.00, 3.00≤d1/d2≤8.00, and 8.00≤d5/d6≤15.00. The image pickup optical camera (10) can obtain high imaging performance, and also satisfies the design requirements of a large aperture, a wide angle, and ultra-thinness.

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 smartphones, the demand for miniaturized photographic lenses has increased. The photosensitive devices of general photographic lenses are nothing more than photosensitive coupling devices (Charge Coupled Device, 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 nowadays electronic products are developed with good functions, thin and short appearance, so they have 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 lens structure. However, 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, the four-element lens structure gradually appears in the lens design. Although the four-element lens has good optical performance, its optical power, lens spacing and lens shape settings are still unreasonable, resulting in the lens structure not being able to meet good optical performance while meeting large aperture, Ultra-thin design requirements.

technical problem

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 large aperture, ultra-thinness and wide-angle while obtaining high imaging performance.

Technical solutions

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 and a fourth lens with negative refractive power;

The focal length of the first lens is f1, the focal length of the imaging optical lens is f, 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 third The focal length of the lens is f3, the on-axis thickness of the first lens is d1, the on-axis distance from the image side of the first lens to the object side of the second lens is d2, and the on-axis thickness of the third lens is d5, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, which satisfies the following relationship:

2.50≤f1/f≤5.00;

-10.00≤(R3+R4)/(R3-R4)≤-3.00;

0.70≤f3/f≤1.00;

3.00≤d1/d2≤8.00;

8.00≤d5/d6≤15.00.

Preferably, the radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8, which satisfies the following relationship:

3.00≤(R7+R8)/(R7-R8)≤8.00.

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

-50.68≤(R1+R2)/(R1-R2)≤-1.84;

0.08≤d1/TTL≤0.36.

Preferably, the focal length of the second lens is f2, the axial thickness of the first lens is d3, and the following relationship is satisfied:

1.07≤f2/f≤8.83;

0.03≤d3/TTL≤0.16.

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:

0.97≤(R5+R6)/(R5-R6)≤5.20;

0.08≤d5/TTL≤0.27.

Preferably, the focal length of the fourth lens is f4, the on-axis thickness of the fourth lens is d7, and the following relationship is satisfied:

-6.22≤f4/f≤-0.67;

0.02≤d7/TTL≤0.13.

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

0.82≤f12/f≤2.76.

Preferably, the aperture F number of the imaging optical lens is less than or equal to 1.51.

Preferably, the total optical length TTL of the camera optical lens is less than or equal to 4.96 mm

Preferably, the image height of the imaging optical lens is IH, and TTL/IH≤3.38.

Beneficial effect

The beneficial effects of the present invention are: the imaging optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide-angle, and ultra-thin. It is especially suitable for high-pixel CCD, CMOS and other imaging elements. Mobile phone 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 invention;

FIG. 2 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;

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

4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 3;

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

FIG. 6 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 5.

Embodiments of the present invention

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 five lenses. Specifically, the imaging optical lens 10 includes an aperture S1, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 in order from the object side to the image side. An optical element such as an optical filter GF may be provided between the fourth lens L4 and the image plane Si.

The first lens L1, the second lens L2, the third lens L3, and the fourth lens L4 are made of plastic materials.

The focal length of the first lens L1 is defined as f1, and the focal length of the imaging optical lens 10 is f, 2.50≤f1/f≤5.00, 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 ball of the system Difference and curvature of field.

Define the radius of curvature of the object side surface of the second lens L2 as R3, and the radius of curvature of the image side surface of the second lens L2 as R4, -10.00≤(R3+R4)/(R3-R4)≤-3.00, which specifies the first The shape of the two lens L2, within the range specified by the conditional formula, can ease the degree of deflection of light passing through the lens and effectively reduce aberrations.

The focal length of the third lens L3 is defined as f3, 0.70≤f3/f≤1.00, and the ratio of the focal length of the third lens L3 to the total focal length is specified. Through the reasonable distribution of the optical power, the system has better imaging quality and lower Sensitivity.

Define the on-axis thickness of the first lens L1 as d1, the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 is d2, 3.00≤d1/d2≤8.00, which specifies The ratio of the thickness of the first lens L1 to the air space between the first lens L1 and the second lens L2 helps to compress the total length of the optical system within the range of the conditional expression, and achieves an ultra-thinning effect.

The on-axis thickness of the third lens L3 is defined as d5, the on-axis distance from the image side surface of the third lens L1 to the object side surface of the fourth lens L4 is d6, 8.00≤d5/d6≤15.00, which specifies The ratio of the thickness of the third lens to the air space between the third and the fourth lens helps to compress the total length of the optical system within the range of the conditional formula, and achieves an ultra-thinning effect.

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 R8, 3.00≤(R7+R8)/(R7-R8)≤8.00, which specifies the fourth lens When the shape of L4 is outside this range, with the development of ultra-thin and wide-angle, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, 3.01≤(R7+R8)/(R7-R8)≤7.98.

The total optical length of the imaging optical lens 10 is defined as TTL.

When the focal length of the imaging optical lens 10 of the present invention, the focal length of each lens, the refractive index of the relevant lens, the total optical length of the imaging optical lens, the axial thickness and the radius of curvature satisfy the above-mentioned relational expressions, the imaging optical lens 10 can be made to have a high Performance, and meet the design requirements of low TTL.

In this embodiment, the object side surface of the first lens L1 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has positive refractive power.

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: -50.68≤(R1+R2)/(R1-R2)≤-1.84, which specifies the first lens When the shape of L1 is within the range specified by the conditional formula, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, -31.67≤(R1+R2)/(R1-R2)≤-2.31.

The on-axis thickness of the first lens L1 is d1, which satisfies the following relationship: 0.08≤d1/TTL≤0.36, which is beneficial to realize ultra-thinness. Preferably, 0.13≤d1/TTL≤0.29.

In this embodiment, the object side surface of the second lens L2 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has positive refractive power.

The focal length of the second lens L2 is f2, which satisfies the following relationship: 1.07≤f2/f≤8.83. 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, it satisfies 1.71≤f2/f≤7.06.

The on-axis thickness of the second lens L2 is d3, which satisfies the following relationship: 0.03≤d3/TTL≤0.16, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d3/TTL≤0.13.

In this embodiment, the object side surface of the third lens L3 is concave at the paraxial position, and the image side surface is convex at the paraxial position, and has positive refractive power.

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: 0.97≤(R5+R6)/(R5-R6)≤5.20, which specifies the third lens L3 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, 1.55≤(R3+R4)/(R3-R4)≤4.16.

The on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.08≤d5/TTL≤0.27, which is beneficial to realize ultra-thinness. Preferably, 0.12≤d5/TTL≤0.21.

In this embodiment, the object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and has a negative refractive power.

The focal length f4 of the fourth lens L4 satisfies the following relational expression: -6.22≤f4/f≤-0.67. Through the reasonable distribution of the optical power, the system has better imaging quality and lower sensitivity. Preferably, -3.89≤f4/f≤-0.84.

The on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.02≤d7/TTL≤0.13, which is beneficial to realize ultra-thinness. Preferably, 0.04≤d7/TTL≤0.11.

The combined focal length of the first lens L1 and the second lens L2 is defined as f12, which satisfies the following relational expression: 0.82≤f12/f≤2.76. Within the range of the conditional expression, the aberration of the imaging optical lens 10 can be eliminated And distortion, and can suppress the back focal length of the camera optical lens 10, and maintain the miniaturization of the image lens system group. Preferably, 1.32≤f12/f≤2.20.

In this embodiment, the aperture F number of the imaging optical lens 10 is less than or equal to 1.51. Large aperture, good imaging performance.

In this embodiment, the total optical length TTL of the imaging optical lens 10 is less than or equal to 4.96 millimeters, which is beneficial to realize ultra-thinness. Preferably, the total optical length TTL of the imaging optical lens 10 is less than or equal to 4.77 mm.

In this embodiment, the image height of the imaging optical lens 10 is defined as IH, and TTL/IH≤3.38, which is conducive to achieving ultra-thinness.

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.

It is worth mentioning that, since the first lens L1, the second lens L2, the third lens L3, and the fourth lens L4 constituting the imaging optical lens 10 of this embodiment have the aforementioned structure and parameter relationship, the imaging The optical lens 10 can reasonably allocate the focal power, surface shape, and axial thickness of each lens, and therefore correct various aberrations, and achieve good optical imaging performance while satisfying large aperture and wide-angle. , Ultra-thin design requirements.

In addition, the imaging optical lens of this application is a TOF (Time of flight) receiving end lens. The principle of TOF technology is that the transmitting end lens emits an infrared surface light source, which is reflected back on the object, and the receiving end lens receives the reflected infrared light information. This process The 3D recognition process is realized. The working wavelength range of the imaging optical lens of this application is 920nm-960nm.

TTL: The total optical length of the camera optical lens, in 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 optical filter GF;

R10: 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 axial thickness of the optical filter GF;

d10: 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;

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;

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 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, 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	0.805	To	To
P1R2	1	0.285	To	To
P2R1	3	0.455	0.945	1.175
P2R2	1	0.585	To	To
P3R1	2	0.545	1.005	To
P3R2	1	0.885	To	To
P4R1	2	0.605	1.555	To
P4R2	2	0.635	1.905	To

【Table 4】

To	Number of stationary points		Stagnation position 1	Stagnation position 2
P1R1	To	To	To
P1R2	1	0.485	To
P2R1	1	0.715	To
P2R2	1	0.955	To
P3R1	To	To	To
P3R2	1	1.275	To
P4R1	2	1.235	1.765
P4R2	1	1.475	To

FIG. 2 shows a schematic diagram of field curvature and distortion of light with a wavelength of 940 nm after passing through the imaging optical lens 10 of the first embodiment. The field curvature S in FIG. 2 is the field curvature in the sagittal direction, and T is the field curvature in the meridian direction.

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 1.667mm, the full-field image height is 2.000mm, 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 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
P1R1	To	To	To
P1R2	1	0.505	To
P2R1	2	0.325	0.955
P2R2	2	0.355	1.115
P3R1	2	0.985	1.065
P3R2	1	1.205	To
P4R1	2	0.725	1.855
P4R2	2	0.705	1.955

【Table 8】

FIG. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 940 nm after passing 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 1.807mm, the full-field image height is 2.000mm, and the diagonal field angle is 71.32°, 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】

【Table 12】

To	Number of stationary points		Stagnation position 1
P1R1	To	To
P1R2	1	0.745
P2R1	1	0.735
P2R2	1	0.955
P3R1	To	To
P3R2	To	To
P4R1	To	To
P4R2	1	1.935

FIG. 6 shows a schematic diagram of field curvature and distortion of light with a wavelength of 940 nm after passing 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 2.086mm, the full-field image height is 2.000mm, and the diagonal field angle is 63.12°, wide-angle, ultra-thin, and its axis and axis The external chromatic aberration is fully corrected and has excellent optical characteristics.

【Table 13】

Among them, FNO is the aperture F number of the imaging lens.

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 and a fourth lens with negative refractive power;

   The focal length of the first lens is f1, the focal length of the imaging optical lens is f, 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 third The focal length of the lens is f3, the on-axis thickness of the first lens is d1, the on-axis distance from the image side of the first lens to the object side of the second lens is d2, and the on-axis thickness of the third lens is d5, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, which satisfies the following relationship:

   2.50≤f1/f≤5.00;

   -10.00≤(R3+R4)/(R3-R4)≤-3.00;

   0.70≤f3/f≤1.00;

   3.00≤d1/d2≤8.00;

   8.00≤d5/d6≤15.00.
2. The imaging optical lens of claim 1, wherein 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, which satisfies the following relationship:

   3.00≤(R7+R8)/(R7-R8)≤8.00.
3. The imaging optical lens according to 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 total optical length of the imaging optical lens is TTL, and satisfies the following relationship:

   -50.68≤(R1+R2)/(R1-R2)≤-1.84;

   0.08≤d1/TTL≤0.36.
4. The imaging optical lens of claim 1, wherein the focal length of the second lens is f2, the axial thickness of the first lens is d3, and the following relationship is satisfied:

   1.07≤f2/f≤8.83;

   0.03≤d3/TTL≤0.16.
5. 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:

   0.97≤(R5+R6)/(R5-R6)≤5.20;

   0.08≤d5/TTL≤0.27.
6. The imaging optical lens of claim 1, wherein the focal length of the fourth lens is f4, the axial thickness of the fourth lens is d7, and the following relationship is satisfied:

   -6.22≤f4/f≤-0.67;

   0.02≤d7/TTL≤0.13.
7. The imaging optical lens of claim 1, wherein the combined focal length of the first lens and the second lens is f12, which satisfies the following relationship:

   0.82≤f12/f≤2.76.
8. The imaging optical lens of claim 1, wherein the aperture F number of the imaging optical lens is less than or equal to 1.51.
9. The imaging optical lens of claim 1, wherein the total optical length TTL of the imaging optical lens is less than or equal to 4.96 millimeters.
10. The imaging optical lens of claim 1, wherein the image height of the imaging optical lens is IH, and TTL/IH≤3.38.

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