CN107561670A - A kind of big thang-kngs of 2.8mm day and night confocal camera lens - Google Patents
A kind of big thang-kngs of 2.8mm day and night confocal camera lens Download PDFInfo
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- CN107561670A CN107561670A CN201710779633.0A CN201710779633A CN107561670A CN 107561670 A CN107561670 A CN 107561670A CN 201710779633 A CN201710779633 A CN 201710779633A CN 107561670 A CN107561670 A CN 107561670A
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Abstract
The present invention relates to a kind of big thang-kngs of 2.8mm day and night confocal camera lens, including set gradually along light incident direction preceding group of eyeglass, diaphragm and after organize eyeglass, group eyeglass is made up of the first bent moon negative lens, double-concave negative lens and the first biconvex positive lens set gradually before described, and the film lens set and the 3rd biconvex positive lens that the rear group eyeglass is made up of the bent moon positive lens, the second biconvex positive lens and the second bent moon negative lens that set gradually form.Not only the scope of application is wider for the camera lens, and rate is high respectively.
Description
Technical field
The present invention relates to a kind of big thang-kngs of 2.8mm day and night confocal camera lens.
Background technology
By development for many years, increasing occasion needs to be equipped with the camera lens of more high definition to realize it in security lens market
Monitoring function demand, the relatively low camera lens of early stage pixel lack the resolution capability to object detail in some fields, partly as matter is good
Lens construction it is complicated, volume is larger, limits its applicability.Some camera lenses have despised camera lens pair to pursue high definition simply
The resolving power of varying environment, different spectrum, while it is difficult to ensure that it is provided simultaneously with the small curvature of field, fine definition, high illumination, big angle
The performances such as degree.
The content of the invention
It is an object of the invention to provide a kind of big thang-kngs of 2.8mm day and night confocal camera lens, not only the scope of application is more for the camera lens
Extensively, and rate is high respectively.
Technical program of the present invention lies in：A kind of big thang-kngs of 2.8mm day and night confocal camera lens, including along light incident direction according to
Preceding group of eyeglass of secondary setting, diaphragm and after organize eyeglass, it is described before group eyeglass born by the first bent moon negative lens, the concave-concave set gradually
Lens and the first biconvex positive lens composition, it is described after group eyeglass by set gradually bent moon positive lens, the second biconvex positive lens and
The film lens set and the 3rd biconvex positive lens composition that second bent moon negative lens is formed.
Further, the airspace between the first bent moon negative lens and double-concave negative lens is 2.6mm；The concave-concave
Airspace between negative lens and the first biconvex positive lens is 1.5mm；The bent moon positive lens and in cemented doublet group second
Airspace between biconvex positive lens is 0.2mm；The second bent moon negative lens and the 3rd biconvex in the cemented doublet group are just
Airspace between lens is 0.1mm.
Further, the airspace between the preceding group eyeglass and rear group eyeglass is 1.7mm.
Further, it is additionally provided with flat board optical filter between the imaging surface of the 3rd biconvex positive lens and camera lens.
Compared with prior art, the present invention has advantages below：
Big clear aperature, shooting brightness is high, scope is wider, is applicable to low according under environment；
The angle of chief ray incident to chip is smaller, the problem of can improving color distortion, strengthens the saturation degree of image；
Using the otherness of front group and rear group, make camera lens can be in normal work under high and low temperature environment, front and rear group poor from Abbe number
Not larger material, is advantageous to the aberration cancellation of front and rear group, and part lens select high-index material, can reduce senior aberration
Introducing；
This optical texture volume is smaller, easy to process and assembling.It is set to possess production from economic, environmental protection material.
Brief description of the drawings
Fig. 1 is the optical texture schematic diagram of the present invention；
Fig. 2 is MTF functional value schematic diagram of the present invention under visible light；
Fig. 3 is MTF functional value schematic diagram of the present invention under 850nm infrared lights；
In figure：A1- the first bent moon negative lens A2- double-concave negative lens A3- the first biconvex positive lens B1- bent moon positive lens B2-
The biconvex positive lens C- diaphragms of second biconvex positive lens B3- the second bent moon negative lenses B4- the 3rd.
Embodiment
For features described above of the invention and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing, make detailed
Carefully it is described as follows, but the present invention is not limited thereto.
Referring to figs. 1 to Fig. 3
A kind of big thang-kngs of 2.8mm day and night confocal camera lens, including set gradually along light incident direction preceding group of eyeglass, diaphragm C and
After organize eyeglass, it is described before group eyeglass it is just saturating by the first bent moon negative lens A1, double-concave negative lens A2 and the first biconvex set gradually
Mirror A3 is formed, and it is negative saturating by the bent moon positive lens B1, the second biconvex positive lens B2 and the second bent moon that set gradually that eyeglass is organized after described
The film lens set and the 3rd biconvex positive lens B4 compositions that mirror B3 is formed.
In the present embodiment, the airspace between the first bent moon negative lens and double-concave negative lens is 2.6mm；It is described double
Airspace between recessed negative lens and the first biconvex positive lens is 1.5mm；The in the bent moon positive lens and cemented doublet group
Airspace between two biconvex positive lens is 0.2mm；The second bent moon negative lens and the 3rd biconvex in the cemented doublet group
Airspace between positive lens is 0.1mm.
In the present embodiment, the airspace organized before described between eyeglass and rear group eyeglass is 1.7mm.
In the present embodiment, flat board optical filter is additionally provided between the imaging surface of the 3rd biconvex positive lens and camera lens.
The specific optical index of such seven chips all-wave camera lens is：
（1）Focal length：EFFL=2.8mm；
（2）F number=1.8；
（3）The angle of visual field：2w≥148°；
（4）Imaging circular diameter is more than Ф 7.2；
（5）Operating spectral range：480nm~850nm；
（6）Distortion：＜ -20%；
（7）Optics overall length TTL≤22.4mm, optics rear cut-off distance >=5.9mm；
（8）The camera lens is applied to 8,000,000 pixel high-resolution CCD or cmos camera.
This optical texture is made up of seven chip spheric glasses, preceding group three, the structure of rear group four, makes full use of structure special
Point, possesses good aberration compensation calibration capability, after the light of wide-angle enters preceding group, after the two panels negative film effect organized before menstruation,
Light gently enters biconvex lens so that preceding group of spherical aberration, astigmatism, the carrying value of aberration are reduced, and are advantageous to rear group of aberration balancing；
Elongate rear Jiao, reduced the angle that light incides image planes, it is easier to carry out the imaging of big image planes.Group uses high refractivity material afterwards
Material, the introducing of senior aberration at large aperture is reduced, progressively reducing aberration magnitude gradually steps up its resolution ratio.The mirror of positive light coke
Piece coordinates the material of high Abbe, broadens operating spectral, improves its night vision effect.By the chromatic aberration correction to wide spectrum, make
Camera lens can be still imaged in 850nm wave bands, and possess less disperse circular diameter at 480nm, day and night confocal same realizing
When ensure that the uniformity of the lens imaging quality.
In the present embodiment, the parameter of wherein eyeglass is as shown in the table：
In the present embodiment, from Fig. 2 and Fig. 3, for the seven chips optical texture under visible light, 200 lines pass letter value to place
The biography letter value for having reached 0.5, Zhou Wai maximums field of view has reached 0.3, can be adapted to 8,000,000 pixel chips.Under infrared light spectrum,
200 lines pass letter value to the center at place and have reached 0.3, illustrate that its night vision effect is good.
Presently preferred embodiments of the present invention is the foregoing is only, for the ordinary skill in the art, according to this hair
Bright teaching, design the big thang-kngs of various forms of 2.8mm and day and night confocal camera lens and do not need performing creative labour, do not departing from
The all equivalent change made according to scope of the present invention patent, modification, replacement and change in the case of the principle and spirit of the present invention
Type, it should all belong to the covering scope of the present invention.
Claims (4)
1. a kind of big thang-kngs of 2.8mm day and night confocal camera lens, it is characterised in that including preceding group set gradually along light incident direction
Eyeglass, diaphragm and after organize eyeglass, it is described before group eyeglass by set gradually the first bent moon negative lens, double-concave negative lens and first pair
Convex positive lens groups are into the rear group eyeglass is negative saturating by the bent moon positive lens, the second biconvex positive lens and the second bent moon that set gradually
The film lens set and the 3rd biconvex positive lens composition that mirror is formed.
A kind of 2. big thang-kngs of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that first bent moon
Airspace between negative lens and double-concave negative lens is 2.6mm；Between the double-concave negative lens and the first biconvex positive lens
Airspace is 1.5mm；Airspace in the bent moon positive lens and cemented doublet group between the second biconvex positive lens is
0.2mm；The airspace between the second bent moon negative lens and the 3rd biconvex positive lens in the cemented doublet group is 0.1mm.
A kind of 3. big thang-kngs of 2.8mm according to claim 1 or 2 day and night confocal camera lens, it is characterised in that group mirror before described
Airspace between piece and rear group eyeglass is 1.7mm.
A kind of 4. big thang-kngs of 2.8mm according to claim 3 day and night confocal camera lens, it is characterised in that the 3rd biconvex
Flat board optical filter is additionally provided between positive lens and the imaging surface of camera lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710779633.0A CN107561670A (en) | 2017-09-01 | 2017-09-01 | A kind of big thang-kngs of 2.8mm day and night confocal camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710779633.0A CN107561670A (en) | 2017-09-01 | 2017-09-01 | A kind of big thang-kngs of 2.8mm day and night confocal camera lens |
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| CN107561670A true CN107561670A (en) | 2018-01-09 |
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| CN201710779633.0A Pending CN107561670A (en) | 2017-09-01 | 2017-09-01 | A kind of big thang-kngs of 2.8mm day and night confocal camera lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594406A (en) * | 2018-06-09 | 2018-09-28 | 福建福光股份有限公司 | A kind of high definition of 2.8mm day and night confocal camera lens |
| CN109752827A (en) * | 2019-03-26 | 2019-05-14 | 东莞市宇瞳光学科技股份有限公司 | A kind of confocal tight shot |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259637A (en) * | 2015-11-04 | 2016-01-20 | 福建福光股份有限公司 | Large-target face day and night confocal high-definition fixed-focus lens |
-
2017
- 2017-09-01 CN CN201710779633.0A patent/CN107561670A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259637A (en) * | 2015-11-04 | 2016-01-20 | 福建福光股份有限公司 | Large-target face day and night confocal high-definition fixed-focus lens |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594406A (en) * | 2018-06-09 | 2018-09-28 | 福建福光股份有限公司 | A kind of high definition of 2.8mm day and night confocal camera lens |
| CN109752827A (en) * | 2019-03-26 | 2019-05-14 | 东莞市宇瞳光学科技股份有限公司 | A kind of confocal tight shot |
| CN109752827B (en) * | 2019-03-26 | 2023-11-07 | 东莞市宇瞳光学科技股份有限公司 | Confocal prime 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: 20180109 |