CN103823297B - A kind of enhanced Color Night Vision System of color separation - Google Patents
A kind of enhanced Color Night Vision System of color separation Download PDFInfo
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Abstract
The invention discloses a kind of enhanced Color Night Vision System of color separation, including：Polarization converter for natural light to be converted to S-polarization light；S-polarization light for Polarization converter to be exported is divided into the first dichroic beamsplitter of feux rouges and blue green light；The second dichroic beamsplitter for the blue green light that the first dichroic beamsplitter reflects to be divided into green glow and blue light；For feux rouges to be carried out into enhanced first image intensifier；For blue light to be carried out into enhanced second image intensifier；For green glow to be carried out into enhanced 3rd image intensifier；Conjunction color component for enhanced feux rouges, blue light and green glow close color；And, the optical signal that will close color component output is converted into the imaging device of image.The enhanced Color Night Vision System of color separation of the present invention can restore coloured image under night-environment and poor light condition, improve image quality, and picture quality is good, is conducive to utilization and extention, possesses wide application prospect.
Description
Technical field
The present invention relates to Color Night Vision System field, and in particular to a kind of enhanced Color Night Vision System of color separation.
Background technology
The development of low-light level night vision device is started from 1936, it be study the enhancing of weak image signal, conversion, transmission, storage,
One know-how for the treatment of.Militarily, Low-light Level Night Vision Technology has been practically applicable to night investigation, aiming, vehicle drive, photoelectricity fire
Control and other battlefield operations, it is possible to is combined with the technology such as infrared, laser, radar, constitute complete photoelectricity investigation, measurement and police
Announcement system.
Night vision system is a kind of image intensifier device.Image intensifier device collects the radiant light that environment is launched, special
It is not a small amount of visible light and infra-red radiation, and amplifies it, is the ambient image that can be perceived by human eye with cause output.
Optical signal in the output section office from image intensifier device can be recorded by tape deck, be displayed in external monitor
On, or can be immediately seen by observer.Under the occasion of the latter, image intensifier device is used in and is worn on head by people
Night vision eyepiece or binocular in, with cause output light signal be directly delivered to human eye.
Night vision system is generally divided into monochrome night vision system and Color Night Vision System.
Common night vision system is monochrome night vision system, is exported using monochrome, usually by white light or all colours
Light amplifies together, using green fluorescence screen, produces monochromatic display.But shown relative to monochrome, it is colored in various monitoring fields
Image is easier to be identified.
Color Night Vision System constitutes unified color night vision by effectively extraction multiband, multi-sensor image information
Image, makes observer to rely on difference in brightness, while can be differentiated and identification scene and target by color distinction again.It is existing
Color Night Vision System generally uses single channel color night vision technology.Traditional single channel low-light level imaging detection system is main by optics
The part such as system and low-light level imaging detector is constituted, and gray level image is by its image for obtaining, and single channel color night vision skill
Art is improved on the basis of conventional one-channel low-light level imaging detection system.Single channel color night vision device only needs an optics
Passage and an imaging band, thus, with constituting simple compact, stable performance, lightweight, low cost, excellent without registration etc.
Point, but its image quality is not high.
Publication No. CN101446681A（Application No. 200810051438.7）Chinese invention patent application disclose
A kind of low-temperature CCD low-light level night vision device, is made up of CCD, preamplifier, the charge signal that will be exported from CCD by preamplifier
It is converted into voltage signal and amplifies, CCD is freezed to -5~-15 DEG C of low temperature, refrigerator intensification side and radiator by refrigerator
Contact；Charge amplifier is added between CCD and preamplifier, is amplified the charge signal from CCD outputs and is transferred to preposition
Amplifier.When scene illumination is relatively low, it is necessary to improve multiplication factor, will cause finally to image noise and increase, image quality declines,
The technical scheme reduces imaging noise by low temperature, improves image quality.But the technical scheme is still without to optical system
It is improved, still using an existing optical channel, image is still monochromatic display, and its effect is of low quality.
The content of the invention
The invention provides it is a kind of can be used for night or poor light condition under the enhanced Color Night Vision System of color separation, image
Quality is good.
A kind of enhanced Color Night Vision System of color separation, including：
Polarization converter for natural light to be converted to S-polarization light；
S-polarization light for Polarization converter to be exported is divided into the first dichroic beamsplitter of feux rouges and blue green light；
The second dichroic beamsplitter for the blue green light that the first dichroic beamsplitter reflects to be divided into green glow and blue light；
For the feux rouges that the first dichroic beamsplitter is transmitted to be carried out into enhanced first image intensifier；
For the blue light that the second dichroic beamsplitter is transmitted to be carried out into enhanced second image intensifier；
For the green glow that the second dichroic beamsplitter reflects to be carried out into enhanced 3rd image intensifier；
For the enhanced feux rouges of the first image intensifier, the enhanced blue light of the second image intensifier and the 3rd image intensifier to be strengthened
Green glow carry out close color conjunction color component；
And, the optical signal that will close color component output is converted into the imaging device of image.
Natural light is by Polarization converter（PCS）S-polarization light is converted into, S-polarization illumination is mapped to the first dichroic light splitting
On mirror, it is divided into reflected light and transmitted light two parts, wherein glaucous light（That is blue green light）Reflected, red light（That is feux rouges,
Abbreviation R light）It is transmitted；Reflected light（That is blue green light）Continue to incide on the second dichroic beamsplitter, be again split into reflected light and
Transmitted light two parts, the light of its Green（That is green glow, abbreviation G light）Reflected, blue light（That is blue light, abbreviation B light）It is saturating
Penetrate, now incide the S-polarization light in system and be divided into tri- kinds of light of primary colours of R, G, B, that is, be divided into feux rouges, green glow, blue light.Through
The R light for crossing the transmission of the first dichroic beamsplitter is strengthened by the first image intensifier, and enhanced light is by from the first image intensifying
Device output end output, incide conjunction color component in；The blue green light of reflection incides the second dichroic beamsplitter, the B light of transmission
Enter to inject the second image intensifier, enhanced B light after the output end output of the second image intensifier from conjunction color component is incided；
Inciding the 3rd image intensifier by the G light that the second dichroic beamsplitter reflects is strengthened, and is entered into after enhanced G light outputs
In conjunction color component；It is imaged on imaging device by closing color component output, finally gives coloured image.
Preferably, the first described dichroic beamsplitter is red anti-bluish-green optical filter, the second described dichroic
Spectroscope is blue anti-green optical filter, i.e., realized by ending the light of different wave length, and the wavelength of feux rouges is 620nm~760nm,
The wavelength of green glow is 495nm~570nm, and the wavelength of blue light is 450nm~490nm, and such as red anti-bluish-green optical filter can end thoroughly
The light of below 600nm wavelength, saturating blue anti-green optical filter can end the light of 493nm wavelengths above.
Preferably, the first described image intensifier, the second image intensifier and the 3rd image intensifier are low-light image intensifying
Device, such as specifically can select cascade image intensifier.
Preferably, described conjunction color component is X-Cube color-combination prisms or is popular in bluish-green optical filter by counter（RDM filters
Piece）With anti-blue red green optical filter thoroughly（BDM optical filters）The conjunction color component that square crossing is formed.
Further preferably, described X-Cube color-combination prisms include：The anti-red face and anti-indigo plant face for intersecting are mutually perpendicular to, its
In, reflected by anti-red face by the enhanced feux rouges of the first image intensifier and projected from the X-Cube color-combination prisms, by second
The enhanced blue light of image intensifier is reflected by anti-indigo plant face and is projected from the X-Cube color-combination prisms, is strengthened by the 3rd image intensifier
Green glow pass through anti-red face and anti-indigo plant face and projected from the X-Cube color-combination prisms.
Further preferably, described conjunction color component is to be popular in bluish-green optical filter by counter（RDM optical filters）It is blue thoroughly red green with anti-
Optical filter（BDM optical filters）The conjunction color component that square crossing is formed, wherein, by the enhanced feux rouges of the first image intensifier by anti-
It is popular in bluish-green optical filter reflection to be projected from the conjunction color component, by the enhanced blue light of the second image intensifier by anti-blue thoroughly red green
Optical filter reflection from it is described conjunction color component project, by the enhanced green glow of the 3rd image intensifier by it is counter be popular in bluish-green optical filter and
Anti- blue red green optical filter thoroughly is projected from the conjunction color component.
Preferably, described imaging device is CCD（Charge coupled cell）Imaging device or COMS
（Complementary Metal-Oxide Semiconductor, Complimentary Metal-Oxide semiconductor）Imaging device, CCD into
As device and COMS imaging devices can all use prior art, that is, the optical signal of color component output is closed by ccd image sensor
Or COMS imageing sensors are received, and coloured image is obtained after then further carrying out follow-up signal treatment.
Preferably, in the enhanced Color Night Vision System of described color separation, light path turn to using speculum, right-angle prism or
Person's curved fiber beam, speculum, right-angle prism or curved fiber beam can well realize the steering of light path.
Compared with prior art, the invention has the advantages that：
The enhanced Color Night Vision System of color separation of the present invention, natural light is converted into S-polarization light by Polarization converter, and S is inclined
The light that shakes is divided into tri- kinds of light of primary colours of R, G, B through the first dichroic beamsplitter and the second dichroic beamsplitter, tri- kinds of primary colours of R, G, B
Light respectively through the first image intensifier, the 3rd image intensifier, the second image intensifier strengthen after be input to conjunction color component in, close color after
Coloured image is formed on imaging device, picture quality is improve.
The enhanced Color Night Vision System of color separation of the present invention can restore coloured image under night-environment and poor light condition,
Image quality is improved, picture quality is good, is conducive to utilization and extention, possesses wide application prospect.
Brief description of the drawings
Fig. 1 is the structural representation of the enhanced Color Night Vision System of color separation of the embodiment of the present invention 1, and in figure, arrow is represented
The light direction of propagation；
Fig. 2 is the structural representation of the enhanced Color Night Vision System of color separation of the embodiment of the present invention 2；
Fig. 3 is the structural representation of the enhanced Color Night Vision System of color separation of the embodiment of the present invention 3；
Fig. 4 is the structural representation of the enhanced Color Night Vision System of color separation of the embodiment of the present invention 4；
In figure：1st, Polarization converter, the 2, first dichroic beamsplitter, the 3, second dichroic beamsplitter, 4, first as increasing
Strong device, the 5, first speculum, the 6, second speculum, the 7, second image intensifier, the 8, the 3rd speculum, the 9, the 3rd image intensifier, 10,
X-Cube color-combination prisms, 11, CCD, the 12, first right-angle prism, the 13, second right-angle prism, the 14, the 3rd right-angle prism, 15,16,
17 is curved fiber beam, and 18 is RDM optical filters, and 19 is BDM optical filters.
Specific embodiment
Embodiment 1
As shown in figure 1, the enhanced Color Night Vision System of color separation of the present invention, including：Polarization converter（PCS）1st, the one two
To color spectroscope 2, the second dichroic beamsplitter 3, the first image intensifier 4, the first speculum 5, the second speculum 6, second as increasing
Strong device 7, the 3rd speculum 8, the 3rd image intensifier 9, X-Cube color-combination prisms 10 and CCD（Detector）11；X-Cube closes color
Prism 10 includes：The anti-red face 10-1 and anti-indigo plant face 10-2 for intersecting are mutually perpendicular to, wherein 10-1 faces are anti-red face, and 10-2 faces are anti-
Blue face.Natural light is converted into S-polarization light by Polarization converter 1, and S-polarization illumination is mapped on the first dichroic beamsplitter 2, point
It is reflected light and transmitted light two parts, wherein glaucous light is reflected, red light（R light）It is transmitted；Blue-green reflected light
Continue to incide and reflected light and transmitted light two parts, the light of its Green are again split on the second dichroic beamsplitter 3（G light）Quilt
Reflection, blue light（B light）It is transmitted, now incides the S-polarization light in system and be divided into tri- kinds of light of primary colours of R, G, B.Through
The R light for crossing the transmission of the first dichroic beamsplitter 2 is strengthened by the first image intensifier 4, and enhanced light is increased from the first picture
The output end output of strong device 4, incides on the first speculum 5, is reflected by the first speculum 5（I.e. light path is turned to）Enter X- afterwards
Cube color-combination prisms 10.The blue green light of reflection incides the second dichroic beamsplitter 3, the B light of transmission（That is blue light）Incide
On two-mirror 6, back reflected light is turned through the light path of the second speculum 6（That is blue light）Into the second image intensifier 7, enhanced B
Light is incided on the 3rd speculum 8 from after the output end output of the second image intensifier 7, then is entered after secondary reflection to X-Cube conjunction colors
Prism 10；Inciding the 3rd image intensifier 9 by the G light that the second dichroic beamsplitter 3 reflects is strengthened, and enhanced G light is defeated
Enter in X-Cube color-combination prisms 10 after going out；The R light of S-polarization（By the R light that the first speculum 5 reflects）Color rib is closed in X-Cube
Anti- red face 10-1 reflections in mirror 10, the B light of S-polarization（By the B light that the 3rd speculum 8 reflects）In X-Cube color-combination prisms 10
In anti-blue face 10-2 reflection, with directly transmit G light（Pass through anti-red face 10- by the enhanced green glow of the 3rd image intensifier 9
1 and anti-indigo plant face 10-3 is projected）Exported from exit facet after closing color, incide and be imaged on CCD11, carry out follow-up signal treatment, finally
Obtain the image of colour.Wherein, speculum and incident ray are in 45 ° of angles, steering-effecting are mainly played, for changing the biography of light
Broadcast direction.
Embodiment 2
As shown in Fig. 2 in the enhanced Color Night Vision System of color separation of the present invention, with the first right-angle prism 12, the second right-angled edge
Mirror 13, the 3rd right-angle prism 14 replace the first speculum 5, the second speculum 6, the 3rd speculum 8 in embodiment 1 respectively, real
The steering of light in existing light path.Natural light is converted into S-polarization light by Polarization converter 1, and by the first dichroic beamsplitter, 2 points are
The R light of reflection and the blue green light of transmission, are strengthened after the reflection of R light by the first image intensifier 4, and enhanced R light passes through the first right angle
One right-angle surface of prism 12 enters, and incides on the inclined-plane of the first right-angle prism 12, and incidence angle is more than the critical angle of prism, institute
There is light to be reflected, exported from another right-angle surface of the first right-angle prism 12, enter into X-Cube color-combination prisms 10；Transmission
Blue green light is incided on the second dichroic beamsplitter 3, and the B light of transmission is incided on the second right-angle prism 13, is turned back through the
Two image intensifiers 7 strengthen, and enter into X-Cube color-combination prisms 10, incident with other two-way by enhanced R light, the photosynthetic colors of G
Into coloured image on to CCD11 or COMS.
The embodiment of the present invention 2 is it is to be understood that the first right-angle prism 12, the second right-angle prism 13, the 3rd right-angle prism 14
Effect is steering prism, or only the first right-angle prism 12 and the 3rd right-angle steering prism of right-angle prism 14, the second right angle
Second speculum 6 of the position of prism 13 shown in Fig. 1；Or only the second right-angle steering prism of right-angle prism 6, the first right angle
The first speculum 5 and the 3rd speculum 8 of prism 12 and the position of the 3rd right-angle prism 14 shown in Fig. 1.Incident ray and right angle
The fully reflecting surface angle of prism is 45 °.
Embodiment 3
As shown in figure 3, in the enhanced Color Night Vision System of color separation of the present invention, light is realized using curved fiber beam 15,16,17
The steering on road, natural light is converted into S-polarization light by Polarization converter 1, and S-polarization light is by the He of the first dichroic beamsplitter 2
R, the light of G, B three primary colours are decomposed into after second dichroic beamsplitter 3, and pass through the first image intensifier 4, the 3rd image intensifying respectively
Device 9, the second image intensifier 7 strengthens.R light enters by the first image intensifier 4 from the light of the beam-splitter of the first image intensifier 4 output
Curved fiber beam 15, output end is traveled in curved fiber beam 15 in total reflection form, into X-Cube color-combination prisms 10；B
Light into curved fiber beam 16 after the enhancing of the second image intensifier 7 by being transmitted to X-Cube color-combination prisms 10；G light passes through the 3rd picture
Booster 9 conducts after strengthening into curved fiber beam 17, into X-Cube color-combination prisms 10, and enhanced R light, the photosynthetic colors of G,
Incide on CCD11 or CMOS into coloured image.
Embodiment 4
As shown in figure 4, in the enhanced Color Night Vision System of color separation of the present invention, wherein 18 is RDM optical filters, it is counter be popular in it is bluish-green
Optical filter, 19 is BDM optical filters, anti-blue red green optical filter thoroughly.Replace above-mentioned implementation with RDM optical filters 18 and BDM optical filters 19
X-Cube color-combination prisms 10 in example 1.By RDM optical filters 18（It is counter to be popular in bluish-green optical filter）With BDM optical filters 19（It is anti-blue thoroughly red
Green optical filter）Square crossing is formed closes color component.Specific implementation process is：It is inclined that natural light is converted into S by Polarization converter 1
Shake light, and S-polarization light is decomposed into R afterwards by the first dichroic beamsplitter 2 and the second dichroic beamsplitter 3, G, B three primary colours
Light.R light strengthens by the first image intensifier 4, and the light of outgoing is reflected by the first speculum 5, incides on RDM optical filters 18, RDM
Optical filter 18 is popular in bluish-green spectro-film with counter, therefore R light is reflected；B light is by anti-by the 3rd after the enhancing of the second image intensifier 7
Mirror 8 is penetrated to reflect, the light after reflection by inciding on BDM optical filters 19, BDM optical filters 19 with anti-blue red green spectro-film thoroughly, because
This B light is reflected, with R light and directly transmission by the enhanced G light of the 3rd image intensifier 9（Increase by the 3rd image intensifier 9
Strong green glow is projected by RDM optical filters 18 and BDM optical filters 19 from color component is closed）Color is closed, is incided on CCD11 or COMS
Into coloured image.
Claims (1)
1. the enhanced Color Night Vision System of a kind of color separation, it is characterised in that including：
Polarization converter for natural light to be converted to S-polarization light；
S-polarization light for Polarization converter to be exported is divided into the first dichroic beamsplitter of feux rouges and blue green light；
The second dichroic beamsplitter for the blue green light that the first dichroic beamsplitter reflects to be divided into green glow and blue light；
For the feux rouges that the first dichroic beamsplitter is transmitted to be carried out into enhanced first image intensifier；
For the blue light that the second dichroic beamsplitter is transmitted to be carried out into enhanced second image intensifier；
For the green glow that the second dichroic beamsplitter reflects to be carried out into enhanced 3rd image intensifier；
For the enhanced feux rouges of the first image intensifier, the enhanced blue light of the second image intensifier and the 3rd image intensifier is enhanced green
Light close the conjunction color component of color；
And, the optical signal that will close color component output is converted into the imaging device of image；
Described conjunction color component is X-Cube color-combination prisms or is popular in bluish-green optical filter and anti-blue red green optical filter thoroughly is vertical by counter
The conjunction color component for intersecting to form；
The first described dichroic beamsplitter is red anti-bluish-green optical filter, and the second described dichroic beamsplitter is thoroughly blue anti-
Green optical filter；
Described X-Cube color-combination prisms include：The anti-red face and anti-indigo plant face for intersecting are mutually perpendicular to, wherein, by the first image intensifying
The enhanced feux rouges of device is reflected by anti-red face and is projected from the X-Cube color-combination prisms, by the enhanced blue light of the second image intensifier
Reflected by anti-indigo plant face and projected from the X-Cube color-combination prisms, by the enhanced green glow of the 3rd image intensifier pass through anti-red face and
Projected from the X-Cube color-combination prisms in anti-indigo plant face；
Described conjunction color component is to be popular in bluish-green optical filter and the anti-conjunction color unit that red green optical filter square crossing is formed blue thoroughly by counter
Part, wherein, bluish-green optical filter reflection from the conjunction color component injection is popular in by counter by the enhanced feux rouges of the first image intensifier,
Reflected by anti-blue thoroughly red green optical filter by the enhanced blue light of the second image intensifier and projected from the conjunction color component, by the 3rd
The enhanced green glow of image intensifier is popular in bluish-green optical filter with anti-blue red green optical filter thoroughly from the conjunction color component injection by counter；
Described the first image intensifier, the second image intensifier and the 3rd image intensifier are gleam image intensifier；
Described imaging device is CCD imaging devices or COMS imaging devices；
In the enhanced Color Night Vision System of described color separation, light path is turned to using speculum, right-angle prism or curved fiber beam.
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| CN106375741A (en) * | 2016-10-11 | 2017-02-01 | 中国人民解放军陆军军官学院 | Night vision true color image acquisition method based on filtering of image intensifier |
| CN106375742A (en) * | 2016-10-11 | 2017-02-01 | 中国人民解放军陆军军官学院 | Device and method of acquiring night vision true color image |
| US10313642B2 (en) * | 2017-01-18 | 2019-06-04 | Omnivision Technologies, Inc. | Imaging system having dual image sensors |
| WO2021056559A1 (en) * | 2019-09-29 | 2021-04-01 | Oppo广东移动通信有限公司 | Beam splitter prism group, camera device, camera method, and terminal |
| CN111458890B (en) * | 2020-04-12 | 2021-03-16 | 国科天成科技股份有限公司 | True-color double-light night vision device system and implementation method |
| CN114088349A (en) * | 2021-09-29 | 2022-02-25 | 歌尔光学科技有限公司 | Method, device and system for testing color-combination prism |
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| WO2004081640A1 (en) * | 1996-10-30 | 2004-09-23 | Toshiaki Hashizume | Projection display |
| JP4072452B2 (en) * | 2003-03-25 | 2008-04-09 | キヤノン株式会社 | Image display device |
| CN102932651A (en) * | 2011-08-13 | 2013-02-13 | 上海摩晶电子科技有限公司 | Color night vision device |
| CN203720447U (en) * | 2014-01-27 | 2014-07-16 | 杭州科汀光学技术有限公司 | Colored night vision system with intensified color splitting |
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