WO2021127891A1 - Image pickup optical camera - Google Patents

Abstract

The present invention relates to the field of optical cameras. Disclosed is an image pickup optical camera (10, 20, 30). From an object side to an image side, the image pickup optical camera (10, 20, 30) sequentially comprises a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5); moreover, the following relational expressions are satisfied: 0.35≤f1/f≤0.60, 3.00≤d4/d5≤12.00, 3.00≤(R3+R4)/(R3-R4)≤10.00, and -15.00≤R5/R6≤-5.00. The image pickup optical camera has good optical performance, such as a large aperture, a long focal length, and ultra-thickness.

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). -OxideSemiconductor Sensor, CMOS Sensor), and due to the improvement 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 a good The miniaturized camera lens with 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 long focal length 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-thinness and long focal length while obtaining high imaging performance.

In order to solve the above technical problems, an embodiment of the present invention provides an imaging optical lens. The imaging optical lens includes, in order from the object side to the image side, a first lens having a positive refractive power, and a second lens having a negative refractive power. Two lenses, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth 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 on-axis distance from the image side of the second lens to the object side of the third lens is d4, and the distance of the third lens is d4. The thickness on the axis is d5, 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, the radius of curvature of the object side of the third lens is R5, and the third lens has a radius of curvature of R5. The curvature radius of the mirror image side is R6, which satisfies the following relationship:

0.35≤f1/f≤0.60;

3.00≤d4/d5≤12.00;

3.00≤(R3+R4)/(R3-R4)≤10.00;

-15.00≤R5/R6≤-5.00.

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

10.00≤d7/d8≤20.00.

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 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:

-2.09≤(R1+R2)/(R1-R2)≤-0.28;

0.07≤d1/TTL≤0.28.

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

-4.16≤f2/f≤-0.32;

0.02≤d3/TTL≤0.06.

Preferably, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

-1.88≤f3/f≤-0.36;

0.33≤(R5+R6)/(R5-R6)≤1.31;

0.02≤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 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:

0.43≤f4/f≤2.48;

0.02≤(R7+R8)/(R7-R8)≤4.06;

0.05≤d7/TTL≤0.17.

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

-2.97≤f5/f≤-0.75;

-6.22≤(R9+R10)/(R9-R10)≤0.35;

0.02≤d9/TTL≤0.11.

Preferably, the focal length of the imaging optical lens is f, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

f/TTL≥1.15.

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

0.34≤f12/f≤1.12.

Preferably, the aperture F number of the imaging optical lens is less than or equal to 2.58.

The beneficial effects of the present invention are: the imaging optical lens according to the present invention has excellent optical characteristics, meets the requirements of ultra-thinness and long focal length, improves imaging quality, and is especially suitable for high-pixel CCD, CMOS and other imaging elements. Mobile phone camera lens components and WEB camera lens.

【Explanation 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.

【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 five lenses. Specifically, the imaging optical lens 10 includes an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 in sequence from the object side to the image side. An optical element such as an optical filter GF may be provided between the fifth lens L5 and the image plane Si.

Define the focal length of the overall imaging optical lens 10 as f, and define the focal length of the first lens L1 as f1, 0.35≤f1/f≤0.60, which specifies the ratio of the focal length f1 of the first lens L1 to the focal length f of the overall imaging optical lens 10. Within the range of conditions, the spherical aberration and curvature of field of the imaging optical lens 10 can be effectively balanced.

Define the on-axis distance from the image side of the second lens L2 to the object side of the third lens L3 as d4, and define the on-axis thickness of the third lens as d5, 3.00≤d4/d5≤12.00, and specify the second lens L2 and the first lens The ratio of the air interval of the three lenses L3 to the thickness of the third lens L3 helps to compress the total length of the optical system within the scope of the conditional formula, and realizes an ultra-thinning effect.

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, 3.00≤(R3+R4)/(R3-R4)≤10.00, 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 alleviated, and aberrations can be effectively reduced.

Define the radius of curvature of the object side surface of the third lens L3 as R5, and the radius of curvature of the image side surface of the third lens L3 as R6, -15.00≤R5/R6≤-5.00, which defines the shape of the third lens L3, which is within the range of the conditional expression , Can ease the degree of deflection of light passing through the lens, and effectively reduce aberrations.

When the focal length of the imaging optical lens 10 of the present invention, the focal length of each lens, and the on-axis distance from the image side of the related lens to the object side satisfy the above relationship, the imaging optical lens 10 can be made to meet the requirements of ultra-thin and long focal length. Good optical performance.

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 is d8, 10.00≤d7/d8≤20.00, which specifies the thickness of the fourth lens L4 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 achieves an ultra-thinning effect.

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: -2.09≤(R1+R2)/(R1-R2)≤-0.28, reasonable control of the first lens The shape of the lens enables the first lens to effectively correct the spherical aberration of the system. Preferably, it satisfies -1.31≤(R1+R2)/(R1-R2)≤-0.35.

The axial thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.07≤d1/TTL≤0.28, which is conducive to achieving ultra-thinness. Preferably, 0.11≤d1/TTL≤0.22 is satisfied.

The focal length of the overall imaging optical lens 10 is f, and the focal length of the second lens L2 is f2, which satisfies the following relationship: -4.16≤f2/f≤-0.32. By controlling the refractive power of the second lens L2 in a reasonable range, it is beneficial for correction The aberration of the optical system. Preferably, it satisfies -2.06≤f2/f≤-0.40.

The on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02≤d3/TTL≤0.06, which is conducive to achieving ultra-thinness. Preferably, 0.03≤d3/TTL≤0.05 is satisfied.

The focal length of the overall imaging optical lens 10 is f, the focal length of the third lens L3 is f3, and the following relationship is satisfied: -1.88≤f3/f≤-0.36. Through the reasonable distribution of optical power, the system has better imaging quality and Lower sensitivity. Preferably, -1.17≤f3/f≤-0.44 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: 0.33≤(R5+R6)/(R5-R6)≤1.31, which can effectively control the third lens L3 The shape of is beneficial to the molding of the third lens L3. Within the specified range of the conditional formula, the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced. Preferably, 0.53≤(R5+R6)/(R5-R6)≤1.05 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, which satisfies the following relationship: 0.02≤d5/TTL≤0.11, which is conducive to achieving ultra-thinness. Preferably, 0.03≤d5/TTL≤0.09 is satisfied.

The focal length of the overall imaging optical lens 10 is f, the focal length of the fourth lens L4 is f4, and the following relational expression is satisfied: 0.43≤f4/f≤2.48. Through the reasonable distribution of optical power, the system has better imaging quality and lower image quality. Sensitivity. Preferably, 0.69≤f4/f≤1.98 is satisfied.

The curvature radius R7 of the object side surface of the fourth lens L4 and the curvature radius R8 of the image side surface of the fourth lens L4 satisfy the following relationship: 0.02≤(R7+R8)/(R7-R8)≤4.06, which can effectively control the fourth lens L4 The shape is beneficial to the shaping of the fourth lens L4. Within the specified range of the conditional formula, the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced. Preferably, 0.02≤(R7+R8)/(R7-R8)≤3.25 is satisfied.

The axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.05≤d7/TTL≤0.17, which is beneficial to realize ultra-thinness. Preferably, 0.07≤d7/TTL≤0.13 is satisfied.

The focal length of the overall imaging optical lens 10 is f, the focal length of the fifth lens L5 is f5, and the following relationship is satisfied: -2.97≤f5/f≤-0.75. Through the reasonable distribution of optical power, the system has better imaging quality and Lower sensitivity. Preferably, it satisfies -1.86≤f5/f≤-0.94.

The curvature radius R9 of the object side surface of the fifth lens L5 and the curvature radius R10 of the image side surface of the fifth lens L5 satisfy the following relationship: -6.22≤(R9+R10)/(R9-R10)≤0.35, the fifth lens is specified When the shape of L5 is within the range of conditions, with the development of ultra-thinness, it is beneficial to correct the aberration of the off-axis angle of view. Preferably, it satisfies -3.89≤(R9+R10)/(R9-R10)≤0.28.

The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02≤d9/TTL≤0.11, which is conducive to achieving ultra-thinness. Preferably, 0.03≤d9/TTL≤0.09 is satisfied.

In this embodiment, the focal length of the camera optical lens is defined as f, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: f/TTL≥1.15, which is conducive to achieving ultra-thinness.

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 relational expression: 0.34≤f12/f≤1.12. Within the range of the conditional expression, the imaging optics can be eliminated The aberration and distortion of the 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, 0.54≤f12/f≤0.90.

In this embodiment, the aperture F number of the imaging optical lens 10 is less than or equal to 2.58. Large aperture, good imaging performance. Preferably, the aperture F number is less than or equal to 2.53.

In this embodiment, the total optical length TTL of the imaging optical lens 10 is less than or equal to 7.02 mm, which is beneficial to realize ultra-thinness. Preferably, the total optical length TTL is less than or equal to 6.70 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 optical filter GF;

R12: 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 optical filter GF;

d11: the axial thickness of the optical filter GF;

d12: 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;

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;

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, and A20 are aspherical systems.

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 and image side of the fourth lens L4, respectively, and P5R1 and P5R2 represent the object side and the image side of the fifth lens L5, 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	1.465	To	To
P1R2	2	0.615	1.105	To
P2R1	0	To	To	To
P2R2	0	To	To	To
P3R1	0	To	To	To
P3R2	2	0.305	1.035	To
P4R1	1	1.505	To	To
P4R2	1	1.585	To	To
P5R1	1	1.445	To	To
P5R2	1	1.865	To	To

【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	2	0.545	1.275
P4R1	0	To	To
P4R2	0	To	To
P5R1	1	1.845	To

P5R2

0

To

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 2.942mm, the full-field image height is 2.04mm, the diagonal field angle is 30.00°, the effective focal length f is 7.355, and the total optical length TTL is 6.385, f/TTL is 1.152, long focal length, ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it 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	Recurve point position 4
P1R1	0	To	To	To	To
P1R2	4	0.075	0.705	0.885	1.175
P2R1	2	0.865	1.035	To	To
P2R2	0	To	To	To	To

P3R1	1	1.095	To	To	To
P3R2	3	0.275	1.075	1.345	To
P4R1	2	0.215	1.255	To	To
P4R2	1	1.505	To	To	To
P5R1	1	1.445	To	To	To
P5R2	3	0.445	1.805	1.835	To

【Table 8】

To	Number of stationary points	Stagnation position 1	Stagnation position 2
P1R1	0	To	To
P1R2	2	0.125	1.365
P2R1	0	To	To
P2R2	0	To	To
P3R1	0	To	To
P3R2	2	0.535	1.285
P4R1	1	0.415	To
P4R2	1	1.725	To
P5R1	0	To	To
P5R2	1	0.955	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 of light with a wavelength of 555 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S in FIG. 8 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 second embodiment satisfies various conditional expressions.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 3.029mm, the full-field image height is 2.04mm, the diagonal field angle is 30.00°, the effective focal length f is 7.573, and the total optical length TTL is 6.381, f/TTL is 1.187, long focal length, ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it 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
P1R1	0	To	To
P1R2	2	0.705	1.065
P2R1	2	0.465	0.875
P2R2	0	To	To
P3R1	1	1.025	To
P3R2	0	To	To
P4R1	1	1.325	To
P4R2	1	1.415	To
P5R1	1	1.395	To
P5R2	1	1.805	To

【Table 12】

To	Number of stationary points	Stagnation position 1
P1R1	0	To
P1R2	0	To
P2R1	0	To
P2R2	0	To

P3R1	0	To
P3R2	0	To
P4R1	0	To
P4R2	0	To
P5R1	1	1.755
P5R2	0	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 of light with a wavelength of 555 nm after passing through the imaging optical lens 30 of the third embodiment. The field curvature S in FIG. 12 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 third embodiment satisfies each conditional expression.

In this embodiment, the entrance pupil diameter of the imaging optical lens is 2.995mm, the full-field image height is 2.04mm, the diagonal field angle is 30.00°, the effective focal length f is 7.488, and the total optical length TTL is 6.380, f/TTL is 1.174, long focal length, ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

【Table 13】

Parameters and conditions	Example 1	Example 2	Example 3
f1/f	0.44	0.60	0.36
d4/d5	8.46	11.60	3.03
(R3+R4)/(R3-R4)	3.18	9.60	3.01
R5/R6	-8.78	-14.89	-5.01
f	7.355	7.573	7.488
f1	3.219	4.536	2.673
f2	-5.362	-15.770	-3.637

f3	-6.900	-4.034	-6.119
f4	8.299	12.506	6.479
f5	-9.902	-11.248	-8.413
f12	5.509	5.528	5.087
Fno	2.50	2.50	2.50

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

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

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 a positive refractive power, a second lens with a negative refractive power, and a second lens with a negative refractive power. Three lenses, a fourth lens with positive refractive power, and a fifth 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 on-axis distance from the image side of the second lens to the object side of the third lens is d4, and the distance of the third lens is d4. The thickness on the axis is d5, 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, the radius of curvature of the object side of the third lens is R5, and the third lens has a radius of curvature of R5. The curvature radius of the mirror image side is R6, which satisfies the following relationship:

   0.35≤f1/f≤0.60;

   3.00≤d4/d5≤12.00;

   3.00≤(R3+R4)/(R3-R4)≤10.00;

   -15.00≤R5/R6≤-5.00.
2. The imaging optical lens of claim 1, wherein the on-axis thickness of the fourth lens is d7, and the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8 , And satisfy the following relationship:

   10.00≤d7/d8≤20.00.
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:

   -2.09≤(R1+R2)/(R1-R2)≤-0.28;

   0.07≤d1/TTL≤0.28.
4. The imaging optical lens of claim 1, wherein the focal length of the second lens is f2, the on-axis thickness of the second lens is d3, and the total optical length of the imaging optical lens is TTL, and satisfies The following relationship:

   -4.16≤f2/f≤-0.32;

   0.02≤d3/TTL≤0.06.
5. The imaging optical lens of claim 1, wherein the focal length of the third lens is f3, the axial thickness of the third lens is d5, and the total optical length of the imaging optical lens is TTL, and satisfies The following relationship:

   -1.88≤f3/f≤-0.36;

   0.33≤(R5+R6)/(R5-R6)≤1.31;

   0.02≤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 axial thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   0.43≤f4/f≤2.48;

   0.02≤(R7+R8)/(R7-R8)≤4.06;

   0.05≤d7/TTL≤0.17.
7. The imaging optical lens of claim 1, wherein the focal length of the fifth lens is f5, the radius of curvature of the object side of the fifth lens is R9, and the radius of curvature of the image side of the fifth lens is R10 , The axial thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   -2.97≤f5/f≤-0.75;

   -6.22≤(R9+R10)/(R9-R10)≤0.35;

   0.02≤d9/TTL≤0.11.
8. The imaging optical lens of claim 1, wherein the focal length of the imaging optical lens is f, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied:

   f/TTL≥1.15.
9. 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:

   0.34≤f12/f≤1.12.
10. The imaging optical lens of claim 1, wherein the aperture F number of the imaging optical lens is less than or equal to 2.58.

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