CN208459669U

CN208459669U - Large aperture, high pixel, high/low temperature be confocal, double light path camera lens

Info

Publication number: CN208459669U
Application number: CN201821047114.1U
Authority: CN
Inventors: 刘勇辉; 龚俊强; 李建华; 王晓; 全丽伟; 潘华; 彭同山; 王世勇; 贾丽娜; 张鸿宇
Original assignee: Union Optech Co Ltd
Current assignee: Union Optech Co Ltd
Priority date: 2018-07-03
Filing date: 2018-07-03
Publication date: 2019-02-01
Anticipated expiration: 2028-07-03

Abstract

The utility model relates to optical imaging system technical field, more particularly to a kind of large aperture, high pixel, high/low temperature be confocal, camera lens of double light path, including the first eyeglass set gradually along light incident direction; second eyeglass, third eyeglass, diaphragm; 4th eyeglass, the 5th eyeglass, the 6th eyeglass; 7th eyeglass; beam splitter, optical filter, the first protection glass; first sensitive chip, the second protection glass and the second sensitive chip；First eyeglass and the 5th eyeglass are glass spheric glass, and the second eyeglass, third eyeglass, the 4th eyeglass, the 6th eyeglass and the 7th eyeglass are plastic cement aspherical lens.In the present solution, the separation in visible light path and infrared light path is realized using beam splitter, so that visible light images in different imaging surfaces from infrared light respectively, then by software processing to realize the picture for shooting colour under night environment.

Description

Large aperture, high pixel, high/low temperature be confocal, double light path camera lens

Technical field

The utility model relates to optical imaging system technical fields, more particularly to a kind of large aperture, high pixel, high/low temperature Confocal, double light path camera lens.

Background technique

Monitor the generally existing such disadvantage of camera lens used in class at present: camera lens pixel is low, high/low temperature is empty burnt, low according under environment Noise is mostly etc.；There was only very few camera lens now, in terms of improving some in the case where sacrificing other aspects, such as in order to realize height Low temperature, high pixel, large aperture, have used Glass aspheric eyeglass, improve cost, are not able to satisfy the need of consumer's low cost It asks；The night picture color of shooting is single, only two kinds of colors of black and white.

Utility model content

Based on this, it is necessary in view of the above technical problems, provide that a kind of large aperture, high pixel, high/low temperature be confocal, double light path Camera lens.

A kind of large aperture, high pixel, high/low temperature be confocal, double light path camera lens, including sets gradually along light incident direction The first eyeglass, the second eyeglass, third eyeglass, diaphragm, the 4th eyeglass, the 5th eyeglass, the 6th eyeglass, the 7th eyeglass, light splitting member Part, optical filter, the first protection glass, the first sensitive chip, the second protection glass and the second sensitive chip；First eyeglass and the 5th Eyeglass is glass spheric glass, and the second eyeglass, third eyeglass, the 4th eyeglass, the 6th eyeglass and the 7th eyeglass are that plastic cement is aspherical Eyeglass；

Wherein, the focal length of the first eyeglass, the second eyeglass, the 4th eyeglass and the 6th eyeglass is negative, third eyeglass, the 5th eyeglass It is positive with the focal length of the 7th eyeglass.

The aspherical face type meets following equation in one of the embodiments:

Wherein, z be it is aspherical along optical axis direction when being highly the position of y away from aspheric vertex of surface apart from rise, c is non- The inverse of sphere curvature radius, k are circular cone whose conic coefficient, ɑ₁To ɑ₈For high order aspheric surface coefficient.

The model of first sensitive chip and the second sensitive chip is 1/2.8 in one of the embodiments, ", it is right Linea angulata height is 6.0mm, and Pixel Dimensions are 2.4 μm of 2.4 μ m.

Compared with prior art, the utility model has been at least up to following effect:

1, for existing monitoring camera generally when low light environment is shot, noise is more, this camera lens is designed using large aperture, is improved Camera lens light passing amount can weaken noise significantly；

2, the periphery resolution ratio of existing high pixel monitoring camera is lower, this camera lens can blur-free imaging in entire picture；

3, existing high pixel monitoring camera can not achieve confocal under high and low temperature environment, generate under white light room temperature to defocused, It is burnt to occur serious race under high and low temperature environment, so that the situation that image planes are fuzzy, this camera lens has well solved high/low temperature and has run burnt problem, Realize the consistency that image quality is imaged under various circumstances；

4, existing high pixel monitoring camera is shot for black and white screen under night environment, this camera lens is realized using beam splitter The separation in visible light path and infrared light path so that visible light images in different imaging surfaces from infrared light respectively, then passes through Software processing shoots colored picture to realize under night environment.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model one embodiment.

Specific embodiment

It is further described below in conjunction with Fig. 1:

A kind of large aperture, high pixel, high/low temperature be confocal, double light path camera lens, including sets gradually along light incident direction The first eyeglass 1, the second eyeglass 2, third eyeglass 3, diaphragm 4, the 4th eyeglass 5, the 5th eyeglass 6, the 6th eyeglass 7, the 7th eyeglass 8, beam splitter 9, optical filter 10, the first protection glass 11, the first sensitive chip 12, second protects glass 13 and the second photosensitive core Piece 14；First eyeglass 1 and the 5th eyeglass 6 are glass spheric glass, the second eyeglass 2, third eyeglass 3, the 4th eyeglass 5, the 6th mirror Piece 7 and the 7th eyeglass 8 are plastic cement aspherical lens；

Wherein, the focal length of the first eyeglass 1, the second eyeglass 2, the 4th eyeglass 5 and the 6th eyeglass 7 is negative, third eyeglass 3, the The focal length of five eyeglasses 6 and the 7th eyeglass 8 is positive.

In the present embodiment, the separation that visible light path and infrared light path are realized using beam splitter 9, so that visible light It images in different imaging surfaces respectively from infrared light, then handles to realize and shoot colour under night environment by software Picture；Meanwhile the first protection glass is equipped between beam splitter 9 and the first sensitive chip 12, the second sensitive chip 14 respectively 11, sensitive chip offer is effectively protected in the second protection glass 13；Also, in view of the use of protection glass can be to camera lens Color difference is introduced, and is corrected, imaging effect is improved.

The aspherical face type meets following equation in one of the embodiments:

The model of first sensitive chip 12 and the second sensitive chip 14 is 1/ in one of the embodiments, 2.8 ", diagonal height is 6.0mm, and Pixel Dimensions are 2.4 μm of 2.4 μ m.

High/low temperature is confocal in one of the embodiments, is mainly realized by the following method: each eyeglass uses different modelings Expect material, to realize the collocation of the different coefficients of expansion, while having used aspherical, ensure that different location of the eyeglass from optical axis produces Raw expansion and contraction generates complementation, in addition having used more pieces of aspherical lens, ensure that high/low temperature complementary effect, to make mirror Head keeps image quality constant in high and low temperature environment.

High pixel is mainly realized by following approach in one of the embodiments: according to the positive and negative of each eyeglass, sufficiently The refractive index and Abbe of screening material, reasonably distribute material, then select suitable material according to this, to reach high efficiency Material adapted；When design while emphasis promotes center resolution, radius of curvature, face type, thickness by adjusting eyeglass And the airspace between eyeglass, ensure that has good correction to the aberration of surrounding visual field, ensures that entire picture Image quality is uniform.

It is mainly real by following approach that picture noise when shooting under low light environment is reduced in one of the embodiments, It is existing: to arrange in pairs or groups by using different materials, realize large aperture design, guarantee enough luminous fluxes.

As shown in table 1, it is the design parameter table in the utility model one embodiment:

Table 1

As shown in table 2, it is each aspherical design parameter table in the utility model one embodiment:

	k	a₂	a₃	a₄	a₅
						2a	8.837E-001	-1.23E-004	-1.28E-006	3.21E-007	-1.52E-008
2b	-2.618E+000	-3.19E-004	-4.88E-007	2.13E-007	6.99E-010
						3a	-3.803E+000	4.65E-005	1.11E-006	-4.48E-008	1.08E-009
3b	-7.073E-001	2.63E-005	4.12E-006	-4.52E-008	-4.74E-009
						5a	-9.132E+001	5.31E-005	1.10E-005	-4.28E-008	-1.74E-009
5b	-2.315E+001	3.051E-004	2.20E-006	1.73E-007	-2.06E-009
						7a	1.30E+000	-6.70E-005	9.11E-007	1.18E-008	1.07E-009
7b	2.208E+002	-3.30E-005	-3.29E-007	9.29E-010	-6.14E-010
						8a	-3.22E+000	-6.52E-005	-3.71E-007	-5.25E-008	-1.07E-009
8b	-2.098E+000	-9.43E-005	6.671E-007	-6.30E-008	-2.06E-010

Table 2.

Claims

1. a kind of large aperture, high pixel, high/low temperature be confocal, double light path camera lens, it is characterised in that: including along light incident direction The first eyeglass (1) set gradually, the second eyeglass (2), third eyeglass (3), diaphragm (4), the 4th eyeglass (5), the 5th eyeglass (6), the 6th eyeglass (7), the 7th eyeglass (8), beam splitter (9), optical filter (10), the first protection glass (11), first is photosensitive Chip (12), the second protection glass (13) and the second sensitive chip (14)；First eyeglass (1) and the 5th eyeglass (6) are glass marble Face eyeglass, the second eyeglass (2), third eyeglass (3), the 4th eyeglass (5), the 6th eyeglass (7) and the 7th eyeglass (8) are plastic cement aspheric Face eyeglass；

Wherein, the focal length of the first eyeglass (1), the second eyeglass (2), the 4th eyeglass (5) and the 6th eyeglass (7) is negative, third eyeglass (3), the focal length of the 5th eyeglass (6) and the 7th eyeglass (8) is positive.

2. large aperture according to claim 1, high pixel, high/low temperature be confocal, double light path camera lens, the aspherical face type Meet following equation:

Wherein, z be it is aspherical along optical axis direction when being highly the position of y away from aspheric vertex of surface apart from rise, c is aspherical The inverse of radius of curvature, k are circular cone whose conic coefficient, ɑ₁To ɑ₈For high order aspheric surface coefficient.

3. large aperture according to claim 1, high pixel, high/low temperature be confocal, double light path camera lens, it is characterised in that: institute The model for stating the first sensitive chip (12) and the second sensitive chip (14) is 1/2.8 ", diagonal height is 6.0mm, pixel Having a size of 2.4 μm of 2.4 μ m.