CN108319005A - A kind of super clear 4K optical systems of the aspherical day and nights of 4mm - Google Patents
A kind of super clear 4K optical systems of the aspherical day and nights of 4mm Download PDFInfo
- Publication number
- CN108319005A CN108319005A CN201810265654.5A CN201810265654A CN108319005A CN 108319005 A CN108319005 A CN 108319005A CN 201810265654 A CN201810265654 A CN 201810265654A CN 108319005 A CN108319005 A CN 108319005A
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- Prior art keywords
- lens
- group
- aspherical
- day
- spherical lens
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
Abstract
The present invention provides a kind of super clear 4K optical systems of the aspherical day and nights of 4mm,It is respectively that incident direction is disposed with preceding group of A from left to right along light from left to right along input path,Diaphragm,After organize B,Group A includes the biconcave lens A 1 set gradually before described,Non-spherical lens A 2,Biconvex lens A 3 and rear group B includes the gluing unit that non-spherical lens B 1 and non-spherical lens B 2 is constituted,Group is negative power before described,Group is positive light coke afterwards,The 4mm fixed-focus 4K camera lenses of the present invention,Double aspherical correction spherical aberrations and senior aberration are organized afterwards,Preceding group of aspherical compensation senior aberration,And reasonable computation and distribute each focal power,Make under high temperature and low temperature environment focus without offset,And achieve the effect that day and night parfocalization,And reduce each eyeglass incidence angle of system,Reduce camera lens susceptibility,Really to realize high-definition camera level,In the case of insufficient light or night,Also there is high definition image quality,Remaining unchanged in the adverse circumstances of different temperatures can be at perfect picture.
Description
Technical field
The present invention relates to a kind of super clear 4K optical systems of the aspherical day and nights of 4mm.
Background technology
Early stage has various fixed-focus high definition camera lenses to be applied in safety-protection system in the market, still, due to structure size
Limitation, glass material and shape limitation, system aberration are difficult correction so that imaging results are not fully up to expectations.With plastics aspheric
The exploitation in face and the promotion of machining accuracy so that imaging system aberration obtains going deep into correction, and image quality greatly promotes, and drops simultaneously
Low camera lens cost.Currently, in security protection industry, rarely have 4K truly super clear, Low Drift Temperature tight shot.
Invention content
The present invention improves the above problem, i.e., the technical problem to be solved by the present invention is in safety-security area in order to carry
For more excellent, the Low Drift Temperature 4K tight shots of a imaging.
Specific embodiments of the present invention are：A kind of super clear 4K optical systems of the aspherical day and nights of 4mm, feature exist
In, it is respectively that incident direction is disposed with preceding group of A, diaphragm, organizes B afterwards from left to right along light from left to right along input path,
It includes aspherical that group A, which includes the biconcave lens A-1 set gradually, non-spherical lens A-2, biconvex lens A-3 and rear group B, before described
The gluing unit that lens B-1 and non-spherical lens B-2 are constituted, it is negative power to be organized before described, and rear group is positive light coke, aspherical
The rear ends mirror B- are equipped with optical filter.
Further, the focal length of mirror biconcave lens A-1 is f1, and non-spherical lens A-2 focal lengths are f2, and biconvex lens A-3 is burnt
Away from for f3, non-spherical lens B-1 focal lengths are f4, and non-spherical lens B-2 focal lengths are f5, are f, ratio relative to system focal length
Example meets：
-1.5<f1/f<-1;
2<f2/f<3;
1.5<f3/f<2;
1<f4/f<2;
-2<f5/f<-1;
Camera lens is set reasonably to be corrected and be balanced in the aberration of the wave-length coverage of 400~850nm.
Further, the airspace between the preceding group A and rear group B is 3.4mm
Further, so that it is zero to make temperature drift to camera lens, under severe temperature condition can be in high temperature and low temperature blur-free imaging
Can high definition imaging, no defocus, rear aspheric powers ratio of organizing must satisfy:0.8<f4/f5<1.0
Further, the material of preceding group of A and rear group B are flint glass or the crown glass of the high dispersion of high refractive index.
Compared with prior art, the invention has the advantages that：The achievable technical indicator of the camera lens is as follows：
Focal length：f′=4mm；
Relative aperture F=1.8；
Field angle：2w >=62 ° (image space is as 2 η ' of visual field >=Ф 7.4mm)；
Distortion：＜ -10%；
Resolution ratio：It can be adapted to 8,000,000 pixel high-resolution CCD or cmos camera；
Total length of light path ∑≤22.4mm, optics rear cut-off distance L ' >=5mm；
It is applicable in spectral line range：400nm~850nm.
In addition it has further the advantage that：
A) each focal length of the system reasonable distribution keeps imaging system spherical aberration and the curvature of field small simultaneously, ensures axle center and off-axis field image
Matter.
B) from the technical indicator of completion it is found that total length of light path is shorter, then camera lens is small；It is burnt big afterwards, it a variety of can connect
The video camera of mouth is used cooperatively；
C) use easy processing, stable chemical performance material, processing cost low；
D) negative power is organized before, organizes positive light coke afterwards, ensureing still can normal use in high and low temperature environment；
E) high refraction, the flint glass of low dispersion is selected to carry out achromatism and the picture that disappears with the crown glass of the high dispersion of high refractive index
It dissipates；
F) system greatly improves image quality by controlling aspherical face type and higher order coefficient.
Description of the drawings
Fig. 1 is optical system structure schematic diagram of the present invention.
Fig. 2 is the MTF under visible light central vision image quality optimal cases.
Fig. 3 is the MTF of night vision.
Fig. 4 is -40 degrees Celsius of low temperature MTF.
Fig. 5 is 80 degrees Celsius of low temperature MTF.
Specific implementation mode
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As shown in Fig. 1~5, a kind of super clear 4K optical systems of the aspherical day and nights of 4mm are divided from left to right along input path
Not Wei along light, incident direction is disposed with preceding group of A, diaphragm, organizes B afterwards from left to right, it is described before group A include setting gradually
Biconcave lens A-1, non-spherical lens A-2, biconvex lens A-3 and rear group B include non-spherical lens B-1 and non-spherical lens B-2
The gluing unit of composition, it is negative power to be organized before described, and rear group is positive light coke, and the rear ends non-spherical lens B- are equipped with optical filter.
The focal length of mirror biconcave lens A-1 is f1, and non-spherical lens A-2 focal lengths are f2, and biconvex lens A-3 focal lengths are f3, non-
Spherical lens B-1 focal lengths are f4, and non-spherical lens B-2 focal lengths are f5, are f relative to system focal length, and ratio meets：
-1.5<f1/f<-1;
2<f2/f<3;
1.5<f3/f<2;
1<f4/f<2;
-2<f5/f<-1;
Camera lens is set reasonably to be corrected and be balanced in the aberration of the wave-length coverage of 400~850nm.
It, can be high under severe temperature condition so that it is zero to make temperature drift to camera lens can be in high temperature and low temperature blur-free imaging
Clear imaging, no defocus, rear aspheric powers ratio of organizing must satisfy：
0.8<f4/f5<1.0
In the present embodiment, preceding group of negative power corrects 3 rank aberrations and 5 rank spherical aberrations, organizes aspherical correction aberration and advanced picture afterwards
Difference.Entire camera lens ensures camera lens refractive index and the distribution of focal power approximate ratio, ensures the equal of the incidence angle size of front and back group eyeglass
Weighing apparatus property improves manufacturing feasibility to reduce the sensibility of camera lens.The reversed property for ensureing front and back group focal power simultaneously, to improve
The popularity that entire camera lens uses, concrete scheme are as follows：
From attached drawing 2 and attached drawing 3 it is found that the distance in visible light and infrared light rear lens focus face differs very little, in same image planes
On can meet two kinds of wave band imaging requirements simultaneously.When visual light imaging, 120 line of central vision is more than 0.7 to place, peripheral field
120 lines are more than 0.55 to place；When infrared 0.85mm wavelength imaging, 120 line of central vision is more than 0.5 to place, 120 line of peripheral field
0.3 is more than to place.It really realizes day and night confocal.
By attached drawing 4 and attached drawing 5 it is found that under extreme high heat and low temperature, imaging MTF also can guarantee 120 line of center to being more than
0.5,120 line of edge is really realized to being more than 0.3 under different severe temperatures, the confocal camera lens of zero temp shift camera lens, i.e. high/low temperature.
If the present invention is open or relates to the parts or structural member of connection fastened to each other, unless otherwise stated,
It is fixedly connected and can be understood as：Connection (such as being connected using bolt or screw) can be removedly fixed, it is understood that be：
It is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (such as make
Manufactured with casting technique is integrally formed) replace (obviously can not be using except integrally formed technique).
In addition, the art for indicating position relationship or shape applied in any technical solution disclosed in aforementioned present invention
Its meaning includes approximate with its, similar or close state or shape to language unless otherwise stated.
Either component provided by the invention by multiple individual component parts either assembled, or one
The separate part that forming technology manufactures.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (5)
1. a kind of super clear 4K optical systems of the aspherical day and nights of 4mm, which is characterized in that be respectively from left to right along input path
Along light, incident direction is disposed with preceding group of A, diaphragm, organizes B afterwards from left to right, it is described before group A include the concave-concave set gradually
Lens A-1, non-spherical lens A-2, biconvex lens A-3 and rear group B include that non-spherical lens B-1 and non-spherical lens B-2 are constituted
Gluing unit, it is described before group be negative power, rear group is positive light coke, and the rear ends non-spherical lens B- are equipped with optical filter.
2. the super clear 4K optical systems of the aspherical day and nights of a kind of 4mm according to claim 1, which is characterized in that mirror is double
The focal length of concavees lens A-1 is f1, and non-spherical lens A-2 focal lengths are f2, and biconvex lens A-3 focal lengths are f3, non-spherical lens B-1
Focal length is f4, and non-spherical lens B-2 focal lengths are f5, are f relative to system focal length, and ratio meets：
-1.5<f1/f<-1;
2<f2/f<3;
1.5<f3/f<2;
1<f4/f<2;
-2<f5/f<-1;
Camera lens is reasonably corrected and is balanced in the aberration of the wave-length coverage of 400~850nm.
3. the super clear 4K optical systems of the aspherical day and nights of a kind of 4mm according to claim 1, which is characterized in that described
Airspace between preceding group of A and rear group B is 3.4mm.
4. the super clear 4K optical systems of the aspherical day and nights of a kind of 4mm according to claim 2, which is characterized in that make
Camera lens can be in high temperature and low temperature blur-free imaging, it is zero to make temperature drift, under severe temperature condition can high definition imaging, without from
Coke, rear aspheric powers ratio of organizing must satisfy:0.8<f4/f5<1.0.
5. the super clear 4K optical systems of the aspherical day and nights of a kind of 4mm according to claim 1, which is characterized in that preceding group of A
And the material of rear group B is flint glass or the crown glass of the high dispersion of high refractive index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810265654.5A CN108319005A (en) | 2018-03-28 | 2018-03-28 | A kind of super clear 4K optical systems of the aspherical day and nights of 4mm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810265654.5A CN108319005A (en) | 2018-03-28 | 2018-03-28 | A kind of super clear 4K optical systems of the aspherical day and nights of 4mm |
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| Publication Number | Publication Date |
|---|---|
| CN108319005A true CN108319005A (en) | 2018-07-24 |
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ID=62899482
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810265654.5A Pending CN108319005A (en) | 2018-03-28 | 2018-03-28 | A kind of super clear 4K optical systems of the aspherical day and nights of 4mm |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983398A (en) * | 2018-09-07 | 2018-12-11 | 福建福光股份有限公司 | A kind of economical 6mm aspheric optical system |
| CN113376811A (en) * | 2021-06-30 | 2021-09-10 | 福建福光股份有限公司 | 2.8mm large-aperture day and night dual-purpose glass-plastic fixed-focus optical system |
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| US5777797A (en) * | 1995-09-11 | 1998-07-07 | Fuji Photo Optical Co., Ltd. | Objective lens system for endoscopes having an image transfer optical fiber bundle |
| US6014262A (en) * | 1998-01-09 | 2000-01-11 | Fuji Photo Optical Co., Ltd. | Collimator lens and optical scanner device which uses such collimator lens |
| CN101339288A (en) * | 2007-07-05 | 2009-01-07 | 富士能株式会社 | Imaging lens and imaging device |
| CN101859016A (en) * | 2009-04-03 | 2010-10-13 | 株式会社理光 | Wide-angle lens and image pick up equipment |
| CN203350520U (en) * | 2012-10-29 | 2013-12-18 | 株式会社光学逻辑 | Shooting lens |
| US20140268369A1 (en) * | 2013-03-18 | 2014-09-18 | Kinko Optical Co., Ltd. | Miniature image pickup lens |
| US20170146774A1 (en) * | 2015-11-20 | 2017-05-25 | Largan Precision Co., Ltd. | Imaging Optical Lens Assembly, Image Capturing Apparatus and Electronic Device |
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2018
- 2018-03-28 CN CN201810265654.5A patent/CN108319005A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5777797A (en) * | 1995-09-11 | 1998-07-07 | Fuji Photo Optical Co., Ltd. | Objective lens system for endoscopes having an image transfer optical fiber bundle |
| US6014262A (en) * | 1998-01-09 | 2000-01-11 | Fuji Photo Optical Co., Ltd. | Collimator lens and optical scanner device which uses such collimator lens |
| CN101339288A (en) * | 2007-07-05 | 2009-01-07 | 富士能株式会社 | Imaging lens and imaging device |
| CN101859016A (en) * | 2009-04-03 | 2010-10-13 | 株式会社理光 | Wide-angle lens and image pick up equipment |
| CN203350520U (en) * | 2012-10-29 | 2013-12-18 | 株式会社光学逻辑 | Shooting lens |
| US20140268369A1 (en) * | 2013-03-18 | 2014-09-18 | Kinko Optical Co., Ltd. | Miniature image pickup lens |
| US20170146774A1 (en) * | 2015-11-20 | 2017-05-25 | Largan Precision Co., Ltd. | Imaging Optical Lens Assembly, Image Capturing Apparatus and Electronic Device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983398A (en) * | 2018-09-07 | 2018-12-11 | 福建福光股份有限公司 | A kind of economical 6mm aspheric optical system |
| CN108983398B (en) * | 2018-09-07 | 2021-02-26 | 福建福光股份有限公司 | Economical 6mm aspheric surface optical system |
| CN113376811A (en) * | 2021-06-30 | 2021-09-10 | 福建福光股份有限公司 | 2.8mm large-aperture day and night dual-purpose glass-plastic fixed-focus optical system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180724 |
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| RJ01 | Rejection of invention patent application after publication |