CN209343020U - A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens - Google Patents
A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens Download PDFInfo
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- CN209343020U CN209343020U CN201822177135.1U CN201822177135U CN209343020U CN 209343020 U CN209343020 U CN 209343020U CN 201822177135 U CN201822177135 U CN 201822177135U CN 209343020 U CN209343020 U CN 209343020U
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Abstract
The utility model relates to a kind of 3.9mm focal length Streaming Media intelligent back vision camera lenses, it is characterized by: rear group of B being positive in the optical system of the camera lens along light incident direction is successively arranged that focal power is negative from left to right preceding group of A, diaphragm C and focal power, organizing A before described includes bent moon negative lens A；Group B includes the biconvex lens B-1 set gradually and the close gluing unit of biconcave lens B-2, bent moon positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 after described, have many advantages, such as larger field angle, high-resolution, optical texture simplify, material price it is relatively inexpensive, can be adapted to the CCD of 2,000,000 pixel high-resolutions or CMOS.
Description
Technical field
The utility model relates to a kind of 3.9mm focal length Streaming Media intelligent back vision camera lenses.
Background technique
Early stage has various wide-angle tight shots to be applied in onboard system in the market, still, due to many products
At edge, aberration and high-order spherical aberration are difficult to correct, and belong to the vehicle-mounted product of low side.Currently, rarely having real meaning in vehicle-mounted industry
The wide-angle tight shot of the high image quality of low cost in justice.
Utility model content
The purpose of this utility model be against the above deficiency place, provide a kind of simple 3.9mm focal length stream matchmaker of structure
Body intelligent back vision camera lens.
The technical solution of the utility model is a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens, the optics of the camera lens
Rear group to be positive in system along light incident direction is successively arranged that focal power is negative from left to right preceding group of A, diaphragm C and focal power
B, organizing A before described includes bent moon negative lens A；Group B includes the biconvex lens B-1 set gradually and biconcave lens B-2 tight after described
Close gluing unit, bent moon positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5.
Further, the airspace between the preceding group A and rear group B is 2.16mm.
Further, the sky between the bent moon negative lens A and biconvex lens B-1 and the close gluing unit of biconcave lens B-2
2.16mm is divided between gas；Sky between the biconvex lens B-1 and the close gluing unit of biconcave lens B-2 and bent moon positive lens B-3
0.3mm is divided between gas；Sky between the bent moon positive lens B-3 and biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5
0.1mm is divided between gas.
Further, the rear of the biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 is provided with optical filter.
Compared with prior art, the utility model has the following beneficial effects: having larger field angle, high-resolution, light
The advantages that structure is simplified, material price is relatively inexpensive is learned, can be adapted to the CCD of 2,000,000 pixel high-resolutions or CMOS.
Detailed description of the invention
The utility model patent is further illustrated with reference to the accompanying drawing.
Fig. 1 is the optical system diagram of the utility model embodiment.
Fig. 2 is the mechanical construction drawing of the utility model embodiment.
Fig. 3 is to focus so that the MTF under visible light central vision image quality optimal cases schemes.
In figure:
A bent moon negative lens A, B-1 biconvex lens B-1, B-2 biconcave lens B-2, B-3 bent moon positive lens B-3, B-4 lenticular
Mirror B-4, B-5 bent moon negative lens B-5,1-AB spacer ring.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
As shown in Figures 1 to 3, a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens, along light in the optical system of the camera lens
The rear group of B that line incident direction is successively arranged that focal power is negative from left to right preceding group of A, diaphragm C and focal power are positive, described preceding group
A includes bent moon negative lens A；After described group B include the biconvex lens B-1 set gradually and the close gluing unit of biconcave lens B-2, it is curved
Moon positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5.
In the present embodiment, the airspace between the preceding group A and rear group B is 2.16mm.
In the present embodiment, between the bent moon negative lens A and biconvex lens B-1 and the close gluing unit of biconcave lens B-2
Airspace be 2.16mm；Between the biconvex lens B-1 and the close gluing unit of biconcave lens B-2 and bent moon positive lens B-3
Airspace be 0.3mm；Between the bent moon positive lens B-3 and biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5
Airspace be 0.1mm.
In the present embodiment, the rear of the biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 is provided with optical filtering
Piece.
A kind of imaging method of 3.9mm focal length Streaming Media intelligent back vision camera lens, sequentially includes the following steps: light from left to right
Successively through bent moon negative lens A, biconvex lens B-1 and the close gluing unit of biconcave lens B-2, bent moon positive lens B-3, biconvex lens B-
It is imaged after the close gluing unit of 4 and bent moon negative lens B-5.
In the present embodiment, following optical index has been reached by the optical system that above-mentioned lens set is constituted:
Focal length: f '=3.9mm；
Relative aperture F=1.9；
Field angle: 2w >=100 ° (image space is as 2 η ' of visual field >=Ф 6.6mm)；
TV distortion: < -7.5%；
Resolution ratio: it can be adapted to 2,000,000 pixel high-resolution CCD or cmos camera；
Total length of light path ∑≤17.2mm, optics rear cut-off distance L ' >=4.68mm；
It is applicable in spectral line range: 420nm~700nm.
From the technical indicator of completion it is found that total length of light path is shorter, then camera lens is small in size；Jiao Shizhong afterwards, can be with trigger
The video camera of interface is used cooperatively；Clear aperture is big, and light-inletting quantity is sufficient, can be in the more dim lower use of environment；Preceding group of negative power,
After organize positive light coke, guaranteeing still can normal use in high and low temperature environment；High refraction, the flint glass of high dispersion and height is selected to reflect
The crown glass of the low dispersion of rate comes achromatism and astigmatism；Eyeglass used in the utility model is global face, and R value is moderate, subtracts
Light eyeglass assembly difficulty reduces processing and material cost using low price glass, while reducing the optical sensitive degree of camera lens.
In the present embodiment, the parameter of each eyeglass is as shown in following table one:
In the present embodiment, AB spacer ring is provided between bent moon negative lens A and biconvex lens B-1, the main function of the mechanical parts
Can guarantee that the airspace of bent moon negative lens A and biconvex lens B-1 and its optical axis are assembled, while intercepting to invalid light
With absorption, AB spacer ring inside can effectively solve the problem that lens stray light problem using the design of delustring line.
In the present embodiment, as can be seen from Figure 3, it is seen that when light is imaged, 120 line of central vision is greater than 0.5,0.7 visual field to place
120 lines are greater than 0.45 to place.
The camera lens has the automotive field market advantage, and preceding group of negative power corrects 3 rank aberrations and 5 rank spherical aberrations, organize glue afterwards
Close piece by the flint glass of the high dispersion of high refractive index and the crown glass of high-refractivity and low-dispersion form mainly correct color difference and as
It dissipating, reasonable distribution focal power reduces each face incidence angle, high-definition camera level is reached with lower susceptibility, in optical design,
Lens element material is reasonably selected, make camera lens the aberration of the wave-length coverage of 420~700nm obtain reasonably correct and
Balance.
Above-listed preferred embodiment has been further described the purpose of this utility model, technical solution and advantage,
It should be understood that the above is only the preferred embodiment of the utility model only, it is not intended to limit the utility model, it is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (4)
1. a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens, it is characterised in that: in the optical system of the camera lens along light from
From left to right incident direction is successively arranged the rear group of B that preceding group of A, diaphragm C and the focal power that focal power is negative are positive, and organizes A packet before described
Include bent moon negative lens A；Group B includes the biconvex lens B-1 set gradually and the close gluing unit of biconcave lens B-2, bent moon after described
Positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5.
2. 3.9mm focal length Streaming Media intelligent back vision camera lens according to claim 1, it is characterised in that: group A is with after before described
Airspace between group B is 2.16mm.
3. 3.9mm focal length Streaming Media intelligent back vision camera lens according to claim 1, it is characterised in that: the bent moon is negative saturating
Airspace between mirror A and biconvex lens B-1 and the close gluing unit of biconcave lens B-2 is 2.16mm；The biconvex lens B-1
Airspace between the close gluing unit of biconcave lens B-2 and bent moon positive lens B-3 is 0.3mm；The bent moon positive lens B-3
Airspace between biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 is 0.1mm.
4. 3.9mm focal length Streaming Media intelligent back vision camera lens according to claim 1, it is characterised in that: the biconvex lens
The rear of B-4 and the close gluing unit of bent moon negative lens B-5 is provided with optical filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822177135.1U CN209343020U (en) | 2018-12-25 | 2018-12-25 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822177135.1U CN209343020U (en) | 2018-12-25 | 2018-12-25 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens |
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| CN209343020U true CN209343020U (en) | 2019-09-03 |
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| CN201822177135.1U Active CN209343020U (en) | 2018-12-25 | 2018-12-25 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471242A (en) * | 2018-12-25 | 2019-03-15 | 福建福光天瞳光学有限公司 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method |
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2018
- 2018-12-25 CN CN201822177135.1U patent/CN209343020U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471242A (en) * | 2018-12-25 | 2019-03-15 | 福建福光天瞳光学有限公司 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method |
| CN109471242B (en) * | 2018-12-25 | 2024-03-05 | 福建福光天瞳光学有限公司 | 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof |
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