CN107656360A - The vehicle-mounted tight shot of 2.8mm ultra-wide angle - Google Patents
The vehicle-mounted tight shot of 2.8mm ultra-wide angle Download PDFInfo
- Publication number
- CN107656360A CN107656360A CN201711144619.XA CN201711144619A CN107656360A CN 107656360 A CN107656360 A CN 107656360A CN 201711144619 A CN201711144619 A CN 201711144619A CN 107656360 A CN107656360 A CN 107656360A
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- China
- Prior art keywords
- lens
- selenodont
- negative
- biconvex
- vehicle
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
Abstract
The present invention relates to a kind of vehicle-mounted tight shot of 2.8mm ultra-wide angle, along light, incident direction is sequentially provided with preceding group of A, afterwards diaphragm, group B, optical filter from left to right in the optical system of the camera lens, and negative selenodont lens A 1, biconcave lens A 2, biconvex lens A 3 that A includes setting gradually are organized before described；Group B includes the selenodont lens B 1, biconvex lens B 2, negative selenodont lens B 3 set gradually after described, biconvex lens B 2 and negative selenodont lens B 3 forms gluing unit, and simple in construction, horizontal field of view reaches 130 °, TTL overall lengths are less than 16mm, possess 2.0 large apertures, night vision effect is good, and definition reaches 3,000,000 ranks, can arrange in pairs or groups 1/3 inch vehicle-mounted imager chips of COMS of maximum use, good manufacturability, cost is low, available for occasions such as driving recording monitoring, reversing monitoring.
Description
Technical field
The present invention relates to a kind of vehicle-mounted tight shot of 2.8mm ultra-wide angle.
Background technology
With the development of science and technology, symbol has arrived, and pursuit of the people to image quality is also by more and more higher.
Although there are various on-vehicle lens to be applied in traffic safety in the market, due to the horizontal field of view angle of these products
Generally between 90 ° -120 °, and night vision effect is poor, and because camera lens market angle is larger, causes processing cost higher.
The content of the invention
The purpose of the present invention is to be directed to above weak point, there is provided a kind of 2.8mm ultra-wide angle simple in construction is vehicle-mounted fixed
Zoom lens.
The technical scheme is that a kind of vehicle-mounted tight shot of 2.8mm ultra-wide angle, edge in the optical system of the camera lens
Incident direction is sequentially provided with preceding group of A, diaphragm, organizes B, optical filter afterwards light from left to right, and it is negative including what is set gradually that A is organized before described
Selenodont lens A-1, biconcave lens A-2, biconvex lens A-3；Group B includes the selenodont lens B-1, double set gradually after described
Convex lens B-2, negative selenodont lens B-3, biconvex lens B-2 and negative selenodont lens B-3 form gluing unit.
Further, the airspace between the negative selenodont lens A-1 and biconcave lens A-2 is 2.1mm, described double
Airspace between concavees lens A-2 and biconvex lens A-3 be 0.3mm, the biconvex lens A-3 and selenodont lens B-1 it
Between airspace be 1.6mm, the selenodont lens B-1 and the glue formed by biconvex lens B-2 and negative selenodont lens B-3
Airspace between charge-coupled is 0.10mm.
Further, the preceding group A is negative power, and the rear B that organizes is positive light coke.
Further, the negative selenodont lens A-1 things side is coated with waterproof membrane.
Further, the radius of curvature of the negative selenodont lens A-1 things side and image side surface be respectively -38.7mm and
The radius of curvature of 2.8mm, biconcave lens A-2 things side and image side surface respectively -28.1mm and 3.1mm, biconvex lens A-3 things side
The radius of curvature of face and image side surface is respectively 5.1mm and -16.7mm, selenodont lens B-1 things side and image side surface curvature half
Footpath is respectively -16.2mm and -4.7mm, the radius of curvature of biconvex lens B-2 things side and image side surface be respectively 14.2mm and -
3.2mm, the radius of curvature for bearing selenodont lens B-3 things side and image side surface is respectively -3.2mm and -7.6mm.
Further, the mechanical structure of the camera lens includes lens barrel, the lens barrel along light from left to right incident direction according to
It is secondary to be provided with preceding group A, diaphragm, organize B, optical filter, trim ring before the lens barrel is provided with front side of negative selenodont lens A-1, biconvex afterwards
Be provided with CD spacer rings between lens A-3 and selenodont lens B-1, selenodont lens B-1 with it is saturating by biconvex lens B-2 and negative selenodont
DE spacer rings are provided between the gluing unit that mirror B-3 is formed.
Compared with prior art, the invention has the advantages that：Compact-sized, horizontal market reaches 130 °, and TTL is total
Length is less than 16mm, and 2.0 large apertures, 3,000,000 rank high definition pixels, night vision imaging effect is splendid, structural member good manufacturability, cost
It is low.
Brief description of the drawings
Patent of the present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the optical system diagram of the embodiment of the present invention.
Fig. 2 is the camera lens mechanical structure schematic diagram of the embodiment of the present invention.
Fig. 3 is the MTF image quality evaluation curves of the embodiment of the present invention；
Fig. 4 is -40 DEG C of defocus MTF curves of low temperature of the embodiment of the present invention；
Fig. 5 is+85 DEG C of defocus MTF curves of high temperature of the embodiment of the present invention.
In figure：
A is organized before A-, B is organized after B-, A-1 bears selenodont lens A-1, A-2 biconcave lens A-2, A-3 biconvex lens A-3, B-1 crescent moon
Type lens B-1, B-2 biconvex lens B-2, B-3 bear selenodont lens B-3.
Embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in Fig. 1~5, a kind of vehicle-mounted tight shot of 2.8mm ultra-wide angle, using flake class formation, the light of the camera lens
In system along light from left to right incident direction be sequentially provided with preceding group of A, diaphragm, afterwards organize B, optical filter, it is described before group A include according to
Negative selenodont lens A-1, biconcave lens A-2, the biconvex lens A-3 of secondary setting；Group B includes the selenodont set gradually after described
Lens B-1, biconvex lens B-2, negative selenodont lens B-3, biconvex lens B-2 and negative selenodont lens B-3 form gluing unit.
In the present embodiment, the airspace between the negative selenodont lens A-1 and biconcave lens A-2 is 2.1mm, institute
It is 0.3mm, the biconvex lens A-3 and selenodont lens B- to state the airspace between biconcave lens A-2 and biconvex lens A-3
Airspace between 1 is 1.6mm, and the selenodont lens B-1 by biconvex lens B-2 and negative selenodont lens B-3 with being formed
Gluing unit between airspace be 0.10mm.
In the present embodiment, the preceding group A is negative power, and the rear B that organizes is positive light coke, with the mesh compensated before and after realization
's.
In the present embodiment, the negative selenodont lens A-1 things side is coated with waterproof membrane.
In the present embodiment, the radius of curvature of the negative selenodont lens A-1 things side and image side surface is respectively -38.7mm
And 2.8mm, the radius of curvature of biconcave lens A-2 things side and image side surface are respectively -28.1mm and 3.1mm, biconvex lens A-3 things
The radius of curvature of side and image side surface is respectively 5.1mm and -16.7mm, selenodont lens B-1 things side and image side surface curvature
Radius is respectively -16.2mm and -4.7mm, the radius of curvature of biconvex lens B-2 things side and image side surface be respectively 14.2mm and -
3.2mm, the radius of curvature for bearing selenodont lens B-3 things side and image side surface is respectively -3.2mm and -7.6mm.
In the present embodiment, the mechanical structure of the camera lens includes lens barrel 1, and the lens barrel is along light incidence side from left to right
To be sequentially provided with preceding group of A, diaphragm, afterwards organize B, optical filter 2, trim ring before the lens barrel is provided with front side of negative selenodont lens A-1
Be provided with CD spacer rings 4 between 3, biconvex lens A-3 and selenodont lens B-1, selenodont lens B-1 with by biconvex lens B-2 with it is negative
DE spacer rings 5 are provided between the gluing unit that selenodont lens B-3 is formed.
In the present embodiment, the optical system being made up of above-mentioned lens set has reached following optical index：
Focal length：f′=2.8mm；
Relative aperture F=2.0；
The angle of visual field：Horizontal 2w >=130 ° (diagonal 2w >=160 °, image space is as the η ' of visual field 2 >=Ф 6.6mm)；
Key light angle incident ray：15 ° of CRA ＜；
TV distorts：＜ -19%；
Total length of light path ∑≤16mm；
Optics rear cut-off distance L ' >=4.5mm（Mechanical rear cut-off distance 4.6mm）；
Resolution ratio：It can be adapted to 3,000,000 pixel high-resolution CCD or cmos camera；
It is applicable spectrum line scope：480nm~656nm.
In the present embodiment, the parameter of each eyeglass is as shown in the table：
In the present embodiment, two negative films of preceding group of A are used for reducing the incident ray of wide-angle visual field, using the low dispersion of low-refraction
Material be advantageous to the correction system curvature of field and ratio chromatism,.B glue pellets are organized afterwards by the ZF glass of the high dispersion of high index of refraction and higher
The LAK glass groups of the low dispersion of refractive index, cemented surface bend towards diaphragm face, main correcting chromatic aberration and advanced oblique spherical aberration, whole camera lens
By refractive index and focal power reasonable distribution, ensure the rational incidence angle of every eyeglass and deflection angle, to reduce the sensitivity of camera lens
Property, improve production yield；Material price selected by camera lens is relatively inexpensive, reduce further cost, and this camera lens has ultra high-definition
Resolving power, be available for 3,000,000 chips use, this camera lens total length of light path is shorter, the small volume of camera lens.
Fig. 3 is the MTF image quality evaluation curves of the embodiment of the present invention, and environment is 20 DEG C of normal temperature, it is seen that light service band, MTF
At spatial frequency 120lp/mm, central vision reaches 0.6,0.7 visual field and reaches 0.5, can reach the solution picture of 3,000,000 high definitions
Power demand.
Fig. 4 is -40 DEG C of defocus MTF curves of low temperature of the embodiment of the present invention；Fig. 5 is+85 DEG C of the high temperature of the embodiment of the present invention
Defocus MTF curve, at spatial frequency 120lp/mm, the defocusing amount of low temperature is 7 μm, and the defocusing amount of high temperature is 6 μm, central vision
For MTF more than 0.5, high/low temperature fully meets the environment requirements of on-vehicle lens as matter performance.
In the present embodiment, lens barrel is the sleeve of bearing lens and spacer ring, its internal each step internal diameter need in strict accordance with
An important factor for processing of drawing tolerance is outer, and the axiality between each step is also to ensure that image quality, i.e. lens barrel and spacer ring and mirror
The vertical plane of piece contact will have accurate perpendicularity with axiality to ensure the stability of eyeglass assembling, it is coordinated with eyeglass tight
It is close, ensure the uniformity of lens light axis, the lens barrel devises M12X0.5-4h hickey mode, meets that in the market client takes the photograph
The matching of camera.
In the present embodiment, the function of preceding trim ring is to push down whole group eyeglass and spacer ring in lens barrel, is fixed each inside the camera lens
Element, ensure the stationarity and stability of eyeglass and mechanical parts assembling, while in order to ensure eyeglass will not be tilted by pressure, except this
Outside mechanical parts axiality itself need to ensure, itself and coordinating for lens barrel employ the fit system that screw thread adds smooth surface simultaneously, it is ensured that whole
Group eyeglass uniform-compression power, so as to ensure image quality.The design of preceding trim ring is different from conventional Φ 14mm external diameters, is pressed before this camera lens
Circle external diameter is Φ 15mm, adds the thang-kng amount of camera lens.
In the present embodiment, the effect of each spacer ring is to ensure airspace and its optical axis assembling of eyeglass, while to nothing
Effect light is intercepted and absorbed.
CD spacer rings：The mechanical parts major function be ensure biconvex lens A-3 and selenodont lens B-1 airspace and its
Optical axis assembles, while controls the clear aperature of camera lens；The interior hooking structure of spacer ring indoor design, is not only reduced anti-in light path
Smooth surface, also make it that non-productive optical is intercepted and absorbs, exterior design ledge structure so that lens holding is more accurate.
DE spacer rings：The design of the mechanical parts be for ensuring that selenodont lens B-1 and biconvex lens B-2 airspace and
Its optical axis is assembled, and invalid light is intercepted and absorbed.
Overall structure of the present invention is light and handy, meets the small principle of overall volume, and in order to ensure finally to combine precision, institute is organic
Tool part is processed using accurate digital control process equipment, ensure the accuracy that coordinates between each mechanical parts and eyeglass with stably
Property.
The object, technical solutions and advantages of the present invention are further described by above-listed preferred embodiment, are answered
Understand, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (6)
- A kind of 1. vehicle-mounted tight shot of 2.8mm ultra-wide angle, it is characterised in that：Along light from left-hand in the optical system of the camera lens Right incident direction is sequentially provided with preceding group of A, diaphragm, organizes B, optical filter afterwards, and the negative selenodont lens that A includes setting gradually are organized before described A-1, biconcave lens A-2, biconvex lens A-3；It is described after group B include set gradually selenodont lens B-1, biconvex lens B-2, Negative selenodont lens B-3, biconvex lens B-2 and negative selenodont lens B-3 forms gluing unit.
- 2. the vehicle-mounted tight shot of 2.8mm ultra-wide angle according to claim 1, it is characterised in that：The negative selenodont lens Airspace between A-1 and biconcave lens A-2 is 2.1mm, the air between the biconcave lens A-2 and biconvex lens A-3 At intervals of 0.3mm, the airspace between biconvex lens A-3 and selenodont the lens B-1 is 1.6mm, and the selenodont is saturating Airspace between mirror B-1 and the gluing unit formed by biconvex lens B-2 and negative selenodont lens B-3 is 0.10mm.
- 3. the vehicle-mounted tight shot of 2.8mm ultra-wide angle according to claim 1, it is characterised in that：Group A is negative light focus before described Degree, the rear B that organizes is positive light coke.
- 4. the vehicle-mounted tight shot of 2.8mm ultra-wide angle according to claim 1, it is characterised in that：The negative selenodont lens A-1 things side is coated with waterproof membrane.
- 5. the vehicle-mounted tight shot of 2.8mm ultra-wide angle according to claim 1, it is characterised in that：The negative selenodont lens The radius of curvature of A-1 things side and image side surface is respectively -38.7mm and 2.8mm, biconcave lens A-2 things side and image side surface song Rate radius is respectively -28.1mm and 3.1mm, the radius of curvature of biconvex lens A-3 things side and image side surface be respectively 5.1mm and - The radius of curvature of 16.7mm, selenodont lens B-1 things side and image side surface is respectively -16.2mm and -4.7mm, biconvex lens B-2 The radius of curvature of thing side and image side surface is respectively 14.2mm and -3.2mm, bears selenodont lens B-3 things side and image side surface Radius of curvature is respectively -3.2mm and -7.6mm.
- 6. the vehicle-mounted tight shot of 2.8mm ultra-wide angle according to claim 1, it is characterised in that：The machinery knot of the camera lens Structure includes lens barrel, and along light, incident direction is sequentially provided with preceding group of A, afterwards diaphragm, group B, optical filter to the lens barrel from left to right, described Trim ring before lens barrel is provided with front side of negative selenodont lens A-1, between biconvex lens A-3 and selenodont lens B-1 be provided with CD every Circle, DE spacer rings are provided between selenodont lens B-1 and the gluing unit formed by biconvex lens B-2 and negative selenodont lens B-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144619.XA CN107656360A (en) | 2017-11-17 | 2017-11-17 | The vehicle-mounted tight shot of 2.8mm ultra-wide angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144619.XA CN107656360A (en) | 2017-11-17 | 2017-11-17 | The vehicle-mounted tight shot of 2.8mm ultra-wide angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107656360A true CN107656360A (en) | 2018-02-02 |
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ID=61121372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711144619.XA Pending CN107656360A (en) | 2017-11-17 | 2017-11-17 | The vehicle-mounted tight shot of 2.8mm ultra-wide angle |
Country Status (1)
| Country | Link |
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| CN (1) | CN107656360A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020909A (en) * | 2017-12-12 | 2018-05-11 | 福建福光股份有限公司 | A kind of 2.8mm focal lengths high definition ultra-wide angle on-vehicle lens |
| CN110488460A (en) * | 2019-08-14 | 2019-11-22 | 福建福光天瞳光学有限公司 | A kind of 2.82mm focal length Streaming Media intelligent back vision camera lens and its imaging method |
-
2017
- 2017-11-17 CN CN201711144619.XA patent/CN107656360A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020909A (en) * | 2017-12-12 | 2018-05-11 | 福建福光股份有限公司 | A kind of 2.8mm focal lengths high definition ultra-wide angle on-vehicle lens |
| CN108020909B (en) * | 2017-12-12 | 2020-09-11 | 福建福光股份有限公司 | 2.8mm focal length high definition super wide angle vehicle-mounted lens |
| CN110488460A (en) * | 2019-08-14 | 2019-11-22 | 福建福光天瞳光学有限公司 | A kind of 2.82mm focal length Streaming Media intelligent back vision camera lens and its imaging method |
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Application publication date: 20180202 |
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