CN218350613U

CN218350613U - Day and night type athermalized high-definition glass-plastic hybrid lens with large aperture of 4mm

Info

Publication number: CN218350613U
Application number: CN202222603660.1U
Authority: CN
Inventors: 薛雷涛; 王锦平; 殷海明; 周欧
Original assignee: Dongguan Changyi Photoelectric Co ltd
Current assignee: Dongguan Changyi Photoelectric Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-01-20
Anticipated expiration: 2032-09-29

Abstract

The utility model discloses a 4mm big light ring is type round clock does not have high clear glass of heat and is moulded hybrid lens, includes according to the preface by the thing side to picture side along the camera lens optical axis: a first lens which is an aspheric plastic lens with negative focal power; a second lens which is an aspheric plastic lens with positive focal power; a third lens which is an aspheric plastic lens with positive focal power; the fourth lens is a spherical glass lens with positive focal power; the fifth lens is a spherical glass lens; a sixth lens which is an aspherical plastic lens having a positive refractive power; a seventh lens which is an aspherical plastic lens having a negative refractive power; the eighth lens is an aspherical plastic lens. The lens adopts 2 pieces of spherical glass and 6 pieces of non-spherical plastic to be mixed and combined, each lens is insensitive, the molding and manufacturing are easy, a 1/2.7 inch chip can be matched, 24-hour all-weather high-definition monitoring is realized, day and night imaging confocal is realized, the real-time shooting picture is clear at high temperature of plus 80 ℃ and low temperature of minus 40 ℃, and the cost performance is higher.

Description

Day and night type athermalized high-definition glass-plastic hybrid lens with large aperture of 4mm

Technical Field

The utility model relates to an optical lens field especially relates to a 4mm big light ring day and night type does not have high clear glass of heat and moulds hybrid lens.

Background

The security lens is used in a security system and matched with a camera for use, and is an eye in the security industry. In recent years, many series of products have been introduced for different purposes of use or environments by monitoring lenses. In the early market, various fixed focus lenses are applied to a security system, but the fixed focus lenses have the problems of low resolution, low edge image quality, fast illumination attenuation, high sensitivity and the like, and the resolution of visible light is reduced in order to improve the night vision effect of the lenses, so that the comprehensive imaging capability of the lenses is reduced.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a 4mm big light ring day and night type does not have high clear glass of heat and moulds hybrid lens, the camera lens has the bright advantage of the high picture of image quality, can 24 hours all-weather high definition control to can keep the picture clear at-40- +80 ℃ of temperature range.

The purpose of the utility model is realized through the following technical scheme:

a day and night type athermalized high-definition glass-plastic hybrid lens with a large aperture of 4mm defines the surface of one side of a lens, which is adjacent to an object plane, as an object side surface, and the surface of one side of the lens, which is adjacent to an image plane, as an image side surface, and is sequentially arranged from the object side to the image side along the optical axis of the lens:

the first lens is an aspheric plastic lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface;

the second lens is an aspheric plastic lens with positive focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;

the third lens is an aspheric plastic lens with positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface;

the fourth lens is a spherical glass lens with positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;

the fifth lens is a spherical glass lens, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface;

the sixth lens is an aspheric plastic lens with positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces;

the seventh lens is an aspheric plastic lens with negative focal power, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface;

the eighth lens element is an aspheric plastic lens, and has a convex object-side surface and a concave image-side surface;

the optical filter is arranged on the image side surface of the eighth lens;

the protective glass is integrated on the image sensor and is arranged on the image side surface of the optical filter;

an image pickup element disposed on an image side surface of the protective glass;

the lens further comprises an aperture diaphragm; the aperture stop is positioned between the third lens and the fourth lens;

the fourth lens and the fifth lens are cemented lenses.

Further, the lens satisfies the following conditions:

1.48≤|f1/f|≤1.70，

13.05≤|f2/f|≤57.3，

10.09≤|f3/f|≤14.6，

4.01≤|f4/f|≤11.5，

-14.76≤f5/f≤56.5，

2.28≤|f6/f|≤2.51，

4.40≤|f7/f|≤61.8，

-175.7≤f8/f≤33.83；

in the relation, f is the total focal length of the lens, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, and f8 is the focal length of the eighth lens.

Further, the focal length, the refractive index and the radius of curvature of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens respectively satisfy the following conditions:

wherein f1 is the focal length of the first lens, ND1 is the refractive index of the first lens, R11 is the radius of curvature of the object-side surface of the first lens, and R12 is the radius of curvature of the image-side surface of the first lens; f2 is the focal length of the second lens, ND2 is the refractive index of the second lens 2, R21 is the curvature radius of the object side surface of the second lens, and R22 is the curvature radius of the image side surface of the second lens; f is the focal length of the third lens, ND3 is the refractive index of the third lens, R31 is the radius of curvature of the object side surface of the third lens, and R32 is the radius of curvature of the image side surface of the third lens; f4 is the focal length of the fourth lens, ND4 is the refractive index of the fourth lens, R41 is the curvature radius of the object side surface of the fourth lens, and R42 is the curvature radius of the image side surface of the fourth lens; f5 is the focal length of the fifth lens, ND5 is the refractive index of the fifth lens, R51 is the curvature radius of the object side surface of the fifth lens, and R52 is the curvature radius of the image side surface of the fifth lens; f6 is the focal length of the sixth lens, ND6 is the refractive index of the sixth lens, R61 is the curvature radius of the object side surface of the sixth lens, and R62 is the curvature radius of the image side surface of the sixth lens; f7 is the focal length of the seventh lens, ND7 is the refractive index of the seventh lens, R71 is the object-side radius of curvature of the seventh lens, and R72 is the image-side radius of curvature of the seventh lens; f8 is the focal length of the eighth lens, ND8 is the refractive index of the eighth lens, R81 is the object-side curvature radius of the eighth lens, and R82 is the image-side curvature radius of the eighth lens; the "-" number indicates that the surface is curved to the side of the object plane.

Further, the lens satisfies the following relation:

IC/TTL≥0.29，

TTL/f≤5.65，

OBFL/TTL≥0.18；

in the relation, f is the total focal length of the lens; TTL is the total optical length of the lens; the OBFL is an optical rear intercept of the lens, that is, a distance from a point on the image side surface of the eighth lens 8 closest to the image plane; the IC is the full image height of the 1/2.7' chip collocated with the lens.

Furthermore, the aperture of the lens is F #, and the requirement that the F # -is less than or equal to 1.3 is met, the total focal length of the lens is F, and the requirement that F =4mm is met, and the total optical length of the lens is TTL, and the requirement that TTL is less than or equal to 22.5mm is met.

Further, aspherical surfaces of the first lens, the second lens, the third lens, the sixth lens, the seventh lens, and the eighth lens satisfy the following formulas:

wherein Z is the rise of the lens along the optical axis direction, k is the conic coefficient of the curved surface, r is the lens height, c is the lens curvature, A, B, C, D, E, F, G is the coefficients of the 4 th, 6 th, 8 th, 10 th, 12 th, 14 th and 16 th order terms of the aspheric surface polynomial.

Further, the central axial distance between the fifth lens and the sixth lens is less than or equal to 0.18mm; the central axial distance between the sixth lens and the seventh lens is less than or equal to 0.18mm; the axial distance between the centers of the seventh lens and the eighth lens is less than or equal to 0.18mm.

Compared with the prior art, the beneficial effects of the utility model are that: this 4mm big light ring day and night type does not have high clear glass of heat and moulds hybrid lens, adopt 2 spherical glass and 6 aspheric surface plastics to mix the combination, optical lens's total focal length F =4mm, light ring F # satisfies that F # is less than or equal to 1.3, under big light ring big focal length, it is just bigger to lead to the light aperture, can guarantee that the contrast of system is high, the picture does not have the vignetting during shooting, system's aberration obtains fine correction simultaneously, optics performance is good. In the aspect of manufacturability, each lens is not sensitive, the lens surface type is simple and easy to manufacture, the structure between the lenses is compact, the processing cost is relatively low on the market, and the lens has the characteristics of high cost performance, small volume, light weight, good performance and low cost. Just the utility model discloses through reasonable lens material selection, focal power distribution and optical design optimization, can arrange 1/2.7's chip, realize 24 hours all-weather high definition control, the confocal of day night formation of image, it is clear at high temperature +80 ℃ and low temperature-40 ℃ real picture of shooing.

Drawings

Fig. 1 is a schematic view of an optical structure according to embodiment 1 of the present invention;

fig. 2 is a schematic view of an optical path structure in embodiment 1 of the present invention;

FIG. 3 is a normal temperature +20 ℃ defocus plot of 0.435-0.656um (125 lp/mm) visible light in embodiment 1 of the present invention;

FIG. 4 is a defocus graph of 0.850um (125 lp/mm) infrared light in embodiment 1 of the present invention;

FIG. 5 is a low temperature-40 ℃ defocus plot of 0.435-0.656um (125 lp/mm) visible light in embodiment 1 of the present invention;

FIG. 6 is the high temperature +80 ℃ defocus plot of visible light 0.435-0.656um (125 lp/mm) in embodiment 1 of the present invention;

fig. 7 is a graph of the relative illuminance of 0.546um in visible light according to embodiment 1 of the present invention;

fig. 8 is a distortion diagram of visible light of 0.546um in embodiment 1 of the present invention;

fig. 9 is a field curvature diagram of the visible light of 0.546um in embodiment 1 of the present invention.

Reference numerals: 1-a first lens; 2-a second lens; 3-a third lens; 4-a fourth lens; 5-a fifth lens; 6-sixth lens; 7-a seventh lens; 8-an eighth lens; 9-an optical filter; 10-protective glass; 11-an image capture element; 12-aperture diaphragm.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. In the present description, the expressions first, second, third and the like are used only for distinguishing one feature from another feature, and do not indicate any limitation on the features. The shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

In the present invention, the paraxial region is a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, the lens surface is concave at least in the paraxial region; when the lens surface is not limited to a convex surface, a concave surface or a flat surface, it means that the lens surface may be a convex surface, a concave surface or a flat surface. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

The utility model provides a 4mm big light ring is type round clock does not have high clear glass of heat and is moulded hybrid lens, and the surface that lens is close to object plane one side is the object side, and the surface that lens is close to image plane one side is the image side, contains according to the preface by the thing side to the image side along the camera lens optical axis:

the optical lens comprises a first lens 1, a second lens 1 and a third lens, wherein the first lens 1 is an aspheric plastic lens with negative focal power, the object side surface of the first lens 1 is a concave surface, and the image side surface of the first lens 1 is a concave surface;

the second lens 2, the second lens 2 is a plastic lens of aspheric surface with positive focal power, the object side of the second lens 2 is a concave surface, the image side is a convex surface;

the third lens 3, the third lens 3 is a plastic lens of aspheric surface with positive focal power, the object side of the third lens 3 is a convex surface, the image side is a concave surface;

the fourth lens 4, the fourth lens 4 is a spherical glass lens with positive focal power, the object side surface of the fourth lens 4 is a convex surface, and the image side surface is a convex surface;

the fifth lens 5, the fifth lens 5 is a spherical glass lens, the object side surface of the fifth lens 5 is a concave surface, and the image side surface is a convex surface;

the sixth lens 6, the sixth lens 6 is an aspheric plastic lens with positive focal power, the object-side surface of the sixth lens 6 is a convex surface, and the image-side surface is a convex surface;

the seventh lens 7, the seventh lens 7 is a plastic lens with negative focal power, the object side of the seventh lens 7 is a concave surface, and the image side is a convex surface;

the eighth lens element 8 and the eighth lens element 8 are aspheric plastic lenses, and the eighth lens element 8 has a convex object-side surface and a concave image-side surface 8.

And the filter 9, the filter 9 is arranged on the image side surface of the eighth lens 8, and the filter 9 is made of H-K9L.

A protective glass 10, the protective glass 10 being integrated on the image sensor, the protective glass 10 being disposed on an image side surface of the optical filter 9;

an image pickup element 11 disposed on the image side surface of the protective glass 10;

the lens further comprises an aperture diaphragm 12, which is positioned between the third lens 3 and the fourth lens 4;

the fourth lens 4 and the fifth lens 5 are cemented lenses.

The utility model discloses in, in order to let optical system present better performance, we will rationally select the focus of lens material, each lens of rational distribution and rationally optimize optical system in the design process to correction system's aberration finally lets the performance optimization of optical system's performance. The utility model discloses in, the focus of first lens 1 is f1, and the focus of second lens 2 is f2, and the focus of third lens 3 is f3, and the focus of fourth lens 4 is f4, and the focus of fifth lens 5 is f5, and the focus of sixth lens 6 is f6, and the focus of seventh lens 7 is f7, and the focus of eighth lens 8 is f8, and the total focus of camera lens is f, and the ratio of each lens and the total focus of system satisfies the following condition:

1.48≤|f1/f|≤1.70，

13.05≤|f2/f|≤57.3，

10.09≤|f3/f|≤14.6，

4.01≤|f4/f|≤11.5，

-14.76≤f5/f≤56.5，

2.28≤|f6/f|≤2.51，

4.40≤|f7/f|≤61.8，

-175.7≤f8/f≤33.83。

the utility model discloses in, consider optical system's aberration and the problem that balanced temperature is floated, the focus of each lens, material and lens R value satisfy following condition respectively:

In the utility model, f is the total focal length of the lens; TTL is the total optical length of the lens; the OBFL is an optical rear intercept of the lens, and the optical rear intercept of the lens is the distance from a point, closest to the image surface, of the image side surface of the eighth lens 8 to the image surface; the IC is the full image height of a 1/2.7' chip matched with the lens; they satisfy the following relationship:

IC/TTL≥0.29，

TTL/f≤5.65，

OBFL/TTL≥0.18。

in the utility model, the aperture of the lens is F #, which satisfies that F # is less than or equal to 1.3; the total focal length of the lens is f, and f =4mm is met; the total optical length of the lens is TTL which is less than or equal to 22.5mm.

The utility model discloses in, first lens 1, second lens 2, third lens 3, sixth lens 6, seventh lens 7 and eighth lens 8's aspheric surface satisfies following formula:

In the utility model, the axial distance between the centers of the fifth lens 5 and the sixth lens 6 is less than or equal to 0.18mm; the central axial distance between the sixth lens 6 and the seventh lens 7 is less than or equal to 0.18mm; the axial distance between the centers of the seventh lens 7 and the eighth lens 8 is less than or equal to 0.18mm.

Following according to the utility model discloses an above-mentioned setting gives the embodiment and specifically explains according to the utility model discloses a 4mm big light ring does not have full glass lens of thermalization high definition. The main element notation is shown in table 1.

TABLE 1

Example 1

Referring to fig. 1 and fig. 2, an optical structure diagram and an optical path structure diagram are shown, respectively. In the present embodiment, the first lens 1, the second lens 2, the third lens 3, the sixth lens 6, the seventh lens 7, and the eighth lens 8 are plastic aspherical lenses, and the fourth lens 4 and the fifth lens 5 are glass spherical lenses.

In the present embodiment, the lens is matched with the 1/2.7 ″ chip so that the field angle DFOV =105 °, the aperture F # =1.2 of the lens, the total focal length F =4mm of the lens, and the total optical length TTL =22.5mm of the lens.

In the present embodiment, the abbe numbers of the first lens 1, the fourth lens 4, the sixth lens 6 and the eighth lens 8 are greater than 55.7, and the abbe numbers of the second lens 2, the third lens 3, the fifth lens 5 and the seventh lens 7 are less than 24, so that the chromatic aberration of the system can be reduced. In consideration of the aberration, the balance temperature drift, the day and night confocal point, and the like of the optical system, the radius of curvature (unit: mm) of each lens, the center thickness d (unit: mm) of each lens, the refractive index (ND) and Abbe constant (VD) of each lens, and the aspherical surface k value (Conc) of each lens are shown in Table 2.

Table 2 shows the radius of curvature (unit: mm) of each lens, the center thickness d (unit: mm) of each lens, the refractive index (ND) and Abbe constant (VD) of each lens, and the aspheric k value (Concic) of each lens.

TABLE 2

Number of noodles	Radius of curvature R	Center thickness d	Refractive index ND	Abbe constant VD	K
						S1	-41.22	0.51	1.53	55.7	-34.59
S2	3.52	2.42			-0.11
						S3	-4.47	2.21	1.67	20.4	0.87
S4	-4.75	0.10			-6.11
						S5	8.67	1.88	1.65	23.5	-0.49
S6	11.82	2.34			-83.14
						S7	Infinity	-0.30
S8	8.51	3.12	1.59	92.5
						S9	-4.64	0.54	1.86	23.8
S10	-22.07	0.11
						S11	5.97	1.85	1.53	55.7	-1.40
S12	-56.02	0.09			-78.32
						S13	-15.32	1.39	1.65	23.5
S14	-17.53	0.09			-275.28
						S15	8.47	1.17	1.53	55.7	-5.21
S16	11.45	1.67			-1.47
						S17	Infinity	0.21	1.51	64.2
S18	Infinity	2.71
						S19	Infinity	0.40	1.51	64.2

In table 2, the radius of curvature represents the degree of curvature of the lens surface, positive values representing the surface being curved to the image plane side, and negative values representing the surface being curved to the object plane side, where "Infinity" represents the surface being a plane; the thickness represents the central axial distance from the current surface to the next surface, the refractive index represents the deflection capability of the current lens material to light rays, and the Abbe number represents the dispersion characteristic of the current lens material to the light rays; the k value represents the magnitude of the best fitting conic coefficient for the aspheric surface.

In the present embodiment, the aspherical surfaces of the first lens 1, the second lens 2, the third lens 3, the sixth lens 6, the seventh lens 7, and the eighth lens 8 satisfy the following equations:

wherein Z is the rise of the lens along the optical axis direction, k is the conic coefficient of the curved surface, gamma is the lens height, c is the lens curvature, A, B, C, D, E, F, G is the coefficients of the 4 th, 6 th, 8 th, 10 th, 12 th, 14 th and 16 th terms of the aspheric surface polynomial.

Table 3 lists the coefficients of the aspheric surfaces of the optical surfaces:

TABLE 3

Number of noodles

A

B

C

D

E

F

G

S1

-1.04E-03

9.60E-05

3.02E-07

-1.45E-07

3.00E-09

2.30E-10

-1.70E-11

S2

-4.22E-04

-1.74E-04

1.45E-05

2.35E-07

2.38E-08

-4.32E-09

3.95E-10

S3

4.83E-03

-4.48E-04

7.71E-06

8.65E-07

3.88E-07

-5.03E-08

-4.19E-10

S4

-8.74E-04

-1.81E-04

1.89E-05

-7.78E-07

2.78E-08

-2.54E-09

-3.48E-11

S5

4.76E-04

-2.63E-04

4.76E-05

-3.57E-06

1.30E-07

-2.25E-09

-1.01E-11

S6

-9.19E-04

-8.93E-05

1.71E-05

-5.21E-07

-2.77E-08

6.69E-10

8.82E-12

S11

-8.79E-04

-3.40E-05

1.80E-06

2.20E-07

1.90E-09

3.33E-10

6.98E-12

S12

1.89E-04

1.85E-05

2.68E-07

4.49E-07

-2.32E-09

1.78E-10

1.34E-10

S13

5.51E-03

-8.42E-05

3.73E-06

2.45E-07

-1.23E-08

-1.85E-10

4.85E-11

S14

2.92E-03

3.24E-04

-2.77E-05

2.90E-06

3.47E-07

-3.39E-08

-4.79E-11

S15

7.42E-04

-7.81E-04

1.08E-04

-9.04E-07

-1.62E-07

1.83E-09

5.92E-11

S16

-3.31E-03

-2.93E-05

-1.53E-06

5.70E-06

-7.74E-07

4.70E-08

-6.64E-10

Referring to fig. 3, 5 and 6, it is shown that the defocusing amount of the lens at high temperature +80 ℃ and low temperature-40 ℃ in the present embodiment is less than 5 μm, so that the small defocusing amount ensures that the lens can shoot high definition pictures at high temperature +80 ℃ and low temperature-40 ℃.

Referring to fig. 4, it is shown that the infrared 0.850 μm defocus amount of the lens in the present embodiment is less than 5 μm, which ensures that the photographed image is clear during night photographing.

Referring to fig. 7, it is shown a relative illumination chart of 0.546 μm of visible light of the lens in this embodiment, where the relative illumination of the lens at the maximum viewing field is greater than 42%, and the light incoming amount is sufficient, so that even if the lens is used in a dark environment, there is no dark angle in the real shot image.

Referring to fig. 8, an F Theta distortion diagram of 0.546 μm of visible light of the lens in the present embodiment is shown, wherein the horizontal axis represents F Theta distortion (unit:%) and the vertical axis represents half field angle (unit:%). As can be seen from the figure, the F Theta distortion of the lens is small and less than 37%, and the distortion degree of the real shot picture is acceptable.

Referring to fig. 9, a field curvature diagram of the visible light of 0.546 μm of the lens in this embodiment is shown.

In conclusion, the day and night type athermalized high-definition glass-plastic hybrid lens with the large aperture of 4mm adopts 2 pieces of spherical glass and 6 pieces of aspheric plastic to be mixed and combined, has a compact structure, is insensitive to all lenses under the same quality in the industry, is simple and easy to manufacture lens surface types, has a relatively low processing cost on the market, has a very high cost performance, and can realize the characteristics of an ultra-large aperture, light weight, good performance and low cost, and the utility model comprehensively considers the problems of aberration, balance temperature drift, day and night confocal and the like of an optical system, can be matched with a 1/2.7-inch chip through reasonable lens material selection, optical power distribution and optical design optimization, realizes 24-hour all-weather high-definition monitoring, day and night imaging confocal, and has clear pictures at high temperature +80 ℃ and low temperature-40 ℃.

The above description is only intended to illustrate several embodiments of the present invention, and the description is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that numerous changes and modifications can be made by those skilled in the art without departing from the spirit of the invention and it is intended that the invention encompass such changes and modifications as well.

Claims

1. The utility model provides a 4mm big light ring day and night type athermalization high clear glass moulds hybrid lens which characterized in that: arranged in order from an object side to an image side along an optical axis of the lens:

the sixth lens is an aspheric plastic lens with positive focal power, and the object-side surface and the image-side surface of the sixth lens are convex surfaces;

the eighth lens element is an aspheric plastic lens, and has a convex object-side surface and a concave image-side surface.

2. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the lens satisfies the following relational expression:

1.48≤|f1/f|≤1.70，

13.05≤|f2/f|≤57.3，

10.09≤|f3/f|≤14.6，

4.01≤|f4/f|≤11.5，

-14.76≤f5/f≤56.5，

2.28≤|f6/f|≤2.51，

4.40≤|f7/f|≤61.8，

-175.7≤f8/f≤33.83；

3. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the focal length value ranges of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens which correspond to each other in sequence are-7.05 to-5.00, +52.83 to +237.8, +40.84 to +60.57, +16.64 to +46.56, -59.75 to +235.7, +9.47 to +10.14, -250 to-18.26 and-733.4 to +140.4 respectively;

the values of the corresponding refractive indexes are respectively 1.52-1.56, 1.60-1.68, 1.57-1.62, 1.84-1.88, 1.52-1.56, 1.60-1.68 and 1.52-1.56;

the values of the curvature radiuses of the object side surfaces which correspond to each other in sequence are respectively-556.0, -41.22, -4.47, -4.17, +8.67, -8.98, +6.34, -8.51, -5.99, -4.64, +5.26, -6.0, -15.32, -11.42 and + 7.15-8.47;

the sequentially corresponding image side curvature radius value ranges are respectively + 3.52- +3.82, -4.87- + 4.75, + 10.91- +12.03, -5.99- + 4.64, -22.07-, -14.55, -175.0-, -56.02, -378.3-, -17.53, and + 7.33- +11.45;

wherein the "-" number indicates that the surface is curved to the object plane side.

4. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the lens satisfies the following relational expression:

IC/TTL≥0.29，

TTL/f≤5.65，

OBFL/TTL≥0.18；

in the relation, f is the total focal length of the lens, TTL is the total optical length of the lens, OBFL is the optical back-focal length of the lens, and IC is the full image height of the 1/2.7' chip with which the lens is associated.

5. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the aperture of the lens is F #, and the requirement that F #, is less than or equal to 1.3, the total focal length of the lens is F, and the requirement that F =4mm, and the optical total length of the lens is TTL, and the requirement that TTL is less than or equal to 22.5mm.

6. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the aspheric surfaces of the first lens, the second lens, the third lens, the sixth lens, the seventh lens and the eighth lens satisfy the following formulas:

wherein: z is the rise of the lens along the optical axis direction, k is the conic coefficient of the curved surface, r is the lens height, c is the lens curvature, A, B, C, D, E, F, G is the coefficients of the 4 th order, 6 th order, 8 th order, 10 th order, 12 th order, 14 th order and 16 th order terms of the aspheric surface polynomial.

7. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the central axial distance between the fifth lens and the sixth lens is less than or equal to 0.18mm; the central axial distance between the sixth lens and the seventh lens is less than or equal to 0.18mm; the axial distance between the centers of the seventh lens and the eighth lens is less than or equal to 0.18mm.

8. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the lens barrel further includes:

the optical filter is arranged on the image side surface of the eighth lens;

an image pickup element disposed on an image side of the protective glass.

9. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the lens further comprises an aperture diaphragm; the aperture stop is located between the third lens and the fourth lens.

10. The day-night type athermal high-definition glass-plastic hybrid lens with a large aperture of 4mm as claimed in claim 1, wherein: the fourth lens and the fifth lens are cemented lenses.