CN209673224U - REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems - Google Patents
REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems Download PDFInfo
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- CN209673224U CN209673224U CN201920002489.4U CN201920002489U CN209673224U CN 209673224 U CN209673224 U CN 209673224U CN 201920002489 U CN201920002489 U CN 201920002489U CN 209673224 U CN209673224 U CN 209673224U
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Abstract
The REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism that the utility model discloses a kind of polarizes double separate imaging optical systems, comprising: Infrared Lens group of looking in the distance, Wollaston prism, imaging infrared lens group and detector assembly；Infrared Lens group of looking in the distance from its small-bore output directional light, and is incident on Wollaston prism for it will be compressed from the directional light that its big incident bore receives after；Wollaston prism, for directional light to be resolved into two beam polarised lights；Imaging infrared lens group, for by the convergence of two beam polarised lights and separate imaging is to detector assembly；Detector assembly, including detector image planes and the cold screen of detector, detector image planes are used to detect two width polarization images of two beam polarised lights formation, and the cold screen of detector is used to reduce the radiation entered on detector assembly.The utility model carries out polarization spectro using Wollaston prism, can obtain two width polarization images of Same Scene in real time；Image Information Processing is carried out using two width polarization images of Same Scene, target acquisition efficiency can be improved.
Description
Technical field
The utility model relates to Infrared Polarization Imaging Technology fields more particularly to a kind of based on the real-time of Wollaston prism
The double separate imaging optical systems of infrared polarization.
Background technique
The imaging technique for detecting scenery optical polarization is exactly polarization imaging, and polarization imaging has a extensive future, such as visits
The target hidden or pretended is surveyed, realizes to the detection and identification of small temperature-difference target, detect target etc. under the conditions of smoky environment.And
With the development of photoelectric technology, various infrared camouflage measures are applied, and the infrared signature of target and background has occurred
Change, cause system to be interfered, seriously affect the detectivity of infrared imaging detection system, limits traditional infrared imaging system
The performance for function of uniting.Infrared Polarization Imaging Technology is the rapid novel imaging technique of development abroad nearly ten years, while utilizing mesh
The radiation intensity information and polarization degree information of scenery are marked, improves imaging system in the detection of target in complex environment and identification energy
Power has more wide application prospect.
Traditional polarized imaging system there are mainly three types of polarization mode is divided, i.e., point amplitude mode, divide aperture mode and polarization
Focal plane imaging mode divides amplitude mode principle simple, but the different polarization component of target must timesharing at identical conditions
It obtains, is easy in the process since environmental factor introduces error；The mode complexity in point aperture is high, system is to noise-sensitive, visits
Survey ability is weaker；Polarization focal plane imaging mode key is that the manufacture craft of detecting element, expensive and optical path are easy
Crosstalk；In consideration of it, analyzing and researching regarding to the issue above, there is this case generation then.
Utility model content
The utility model embodiment provides a kind of double separate imaging optics of REAL TIME INFRARED THERMAL IMAGE polarization based on Wollaston prism
System is easy to introduce error due to environmental factor to solve conventional polarization imaging system point amplitude mode in the prior art；Point
To noise-sensitive, detectivity is weaker for aperture mode complexity height, system；Polarize that focal plane imaging mode is expensive and light
The problem of appearance of a street easy crosstalk.
The utility model embodiment provides a kind of double separate imaging optics of REAL TIME INFRARED THERMAL IMAGE polarization based on Wollaston prism
System, comprising: the Infrared Lens group of looking in the distance of coaxial arrangement, Wollaston Wollaston prism, imaging infrared lens group and
Detector assembly；
The Infrared Lens group of looking in the distance, for it will be compressed from the directional light that its big incident bore receives after, from it
Small-bore output directional light, and it is incident on the Wollaston Wollaston prism；
The Wollaston Wollaston prism is being spatially separating and polarization state is mutual for resolving into the directional light
Two mutually orthogonal beam polarised lights；
The imaging infrared lens group, for will two beams polarised light convergence simultaneously separate imaging to detector assembly；
The detector assembly, including detector image planes and the cold screen of detector, the detector image planes are for detecting two
The two width polarization images that beam polarised light is formed, the cold screen of detector are used to reduce the stray radiation entered on detector assembly.
Preferably, the Infrared Lens group of looking in the distance specifically includes: multiple and different optical materials have positive light coke or negative
Focal power and the Infrared Lens of coaxial arrangement.
Preferably, the Wollaston Wollaston prism isosceles right angle trigonometry prism mutually orthogonal by two blocks of optical axises
Crystal optical cement forms.
Preferably, the cold screen of the detector specifically includes:
Diaphragm is reduced spuious on refrigeration detector for guaranteeing the cold stop efficiency of the imaging optical system
Radiation.
Preferably, the Wollaston Wollaston prism material using magnesium fluoride or other with crystalline nature
Infra-red material.
Preferably, the Wollaston prism is specifically used for:
It is different by the direction of optic axis of two triangular prism grain boundary two sides, make incident ray when by cemented surface by seeking
Ordinary light makes the light of different direction of vibration that different foldings occur to the variation of abnormal light or by the variation of abnormal light to ordinary light
It penetrates, is formed in and is spatially separating and two beam polarised lights that polarization state is mutually orthogonal, the two beams polarised light angle β size are 2 (no-
ne), wherein noAnd neFor ordinary refraction index in crystal and abnormal optical index.
Using the utility model embodiment, the REAL TIME INFRARED THERMAL IMAGE polarization provided by the utility model based on Wollaston prism is double
Separate imaging optical system use monochromatic light road polarization imaging mode, solve conventional polarization imaging system point amplitude mode be easy by
Error is introduced in environmental factor；Divide aperture mode complexity height, system to noise-sensitive, detectivity is weaker；Polarize focal plane
The problem of imaging mode is expensive and optical path is easy crosstalk.Polarization spectro is carried out using Wollaston Wollaston prism,
Two width polarization images of Same Scene can be obtained in real time；Image Information Processing is carried out using two width polarization images of Same Scene,
Target acquisition efficiency can be improved, technical foundation is established in the development for REAL TIME INFRARED THERMAL IMAGE polarization imaging and detection.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose, feature of the utility model
It can be more clearly understood with advantage, it is special below to lift specific embodiment of the present utility model.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as practical to this
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is Wollaston Wollaston prism structure schematic diagram provided by the embodiment of the utility model；
Fig. 2 is that the REAL TIME INFRARED THERMAL IMAGE provided by the embodiment of the utility model based on Wollaston prism polarizes double separate imaging light
Learn system principle schematic diagram；
Fig. 3 is that the REAL TIME INFRARED THERMAL IMAGE provided by the embodiment of the utility model based on Wollaston prism polarizes double separate imaging light
Learn system schematic；
Fig. 4 is Infrared Lens group schematic diagram provided by the embodiment of the utility model of looking in the distance；
Fig. 5 is imaging infrared lens group schematic diagram provided by the embodiment of the utility model；
Fig. 6 is detector assembly provided by the embodiment of the utility model and double separate imaging schematic diagrames；
Fig. 7 is the modulation transfer function figure of polarised light 1 provided by the embodiment of the utility model；
Fig. 8 is the modulation transfer function figure of polarised light 2 provided by the embodiment of the utility model.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The utility model embodiment provides the REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism and polarizes double separate imaging optical systems,
As shown in Figure 2 and Figure 3, comprising: the Infrared Lens group 1 of looking in the distance of coaxial arrangement, Wollaston Wollaston prism 2, imaging infrared
Lens group 3 and detector assembly；
The Infrared Lens group 1 of looking in the distance, for it will be compressed from the directional light that its big incident bore receives after, from it
Small-bore output directional light, and it is incident on the Wollaston Wollaston prism 2；
Wherein, the Infrared Lens group 1 of looking in the distance specifically includes: multiple and different optical materials have positive light coke or negative light
Focal power and the Infrared Lens of coaxial arrangement.
The Wollaston Wollaston prism 2 is being spatially separating and polarization state is mutual for resolving into the directional light
Two mutually orthogonal beam polarised lights；As shown in Figure 1, prism sharp angle α is 45 ° in Fig. 1, Wollaston Wollaston prism 2 utilizes boundary
The difference of face two sides direction of optic axis, the natural light for making normal incidence to prism surface AB resolve into ordinary light after entering left prism ABD
With abnormal light, their direction of vibration is respectively perpendicular to and is parallel to plan, therefore although their direction of propagation is consistent, right
The refractive index answered is not but identical, and the refractive index of ordinary light and abnormal light is respectively noAnd ne；Into after right prism ACD, perpendicular to figure
The vibration component of plane becomes abnormal light from ordinary light, and refractive index is by noBecome ne, light is by downward deviation, and it is flat to be parallel to figure
The vibration component in face becomes ordinary light from abnormal light, and refractive index is by neBecome no, the upward deviation of light；Final polarization direction is orthogonal
Two beam polarised lights occur space separation.Therefore, Ray Of Light is after being incident on Wollaston Wollaston prism 2, can be with
The two beams polarised light mutually orthogonal in the polarization state being spatially separating is generated simultaneously；
Wherein, noAnd neFor ordinary refraction index in crystal and abnormal optical index, two beam polarised light angle β sizes are 2
(no-ne)；
Wherein, the Wollaston Wollaston prism 2 is brilliant by the mutually orthogonal isosceles right angle trigonometry prism of two blocks of optical axises
Body optical cement forms, and its material uses magnesium fluoride or other infra-red materials with crystalline nature.
The imaging infrared lens group 3, for will two beams polarised light convergence simultaneously separate imaging to detector assembly,
Have two beam polarised lights spatially separated, as shown in Figure 6；
The detector assembly, including detector image planes 5 and the cold screen 4 of detector, the detector image planes 5 are for visiting
Two width polarization images of two beam polarised lights formation are surveyed, the cold screen 4 of detector is used to reduce spuious on detector assembly
Radiation；
Wherein, detector assembly is infrared refrigeration mode detector, and the utility model embodiment mainly mentions refrigeration detector
Cold screen and detector image planes 5, do not repeated them here about the refrigeration machine of detector and circuit etc.；
Wherein, the cold screen 4 of the detector specifically includes:
Diaphragm is reduced spuious on refrigeration detector for guaranteeing the cold stop efficiency of the imaging optical system
Radiation.
By taking medium-wave infrared as an example, the REAL TIME INFRARED THERMAL IMAGE polarization based on Wollaston prism specifically designed as described above is double
Separate imaging optical system, as shown in Figure 3；
With the optical path that object scene radiation energy starts, light by Infrared Lens group compression of looking in the distance, is entered first with directional light
It is mapped on Wollaston Wollaston prism, so that Wollaston Wollaston prism generates two beams in the polarization being spatially separating
The mutually orthogonal polarised light of state, is referred to as polarised light 1 and polarised light 2, two beam polarised lights using imaging infrared lens group into
Two width polarization images are finally imaged on detector assembly by the convergence of row light simultaneously.Wherein:
1. component parameter of looking in the distance are as follows:
Service band: 4.2 μm of medium-wave infrared；
System composition: two panels lens, material be germanium and zinc selenide, as shown in Figure 4；
Effective aperture: 60mm；
Focal length: f=240mm；
F number: F/#=4；
2. polarization spectro component parameter are as follows:
Polarization beam splitter: Wollaston Wollaston prism；
Wollaston Wollaston prism side length: 20mm；
Wollaston Wollaston prism material: magnesium fluoride；
3. image-forming assembly parameter are as follows:
Service band: 4.2 μm of medium-wave infrared；
System composition: two panels lens, material be germanium and zinc selenide, as shown in Figure 5；
Effective aperture: 60mm；
Focal length: f=80mm；
F number: F/#=4；
Cold stop efficiency: 100%；
4. detector assembly parameter are as follows:
Type photodetector: medium wave refrigeration mode detector；
Pixel dimension: 15 μm；
The REAL TIME INFRARED THERMAL IMAGE for being based ultimately upon Wollaston prism polarizes pair two width polarization images of separate imaging optical systems
Modulation transfer function figure is as shown in Figure 7, Figure 8.
The REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism provided in the utility model embodiment polarizes double separate imaging optics
System uses monochromatic light road polarization imaging mode, carries out polarization spectro using Wollaston Wollaston prism, can obtain in real time same
Two width polarization images of one scene；Image Information Processing is carried out using two width polarization images of Same Scene, target can be improved
Technical foundation is established in detection efficient, the development for REAL TIME INFRARED THERMAL IMAGE polarization imaging and detection, solves conventional polarization imaging system point
Amplitude mode is easy to introduce error due to environmental factor；Point aperture mode complexity is high, system is to noise-sensitive, detectivity compared with
It is weak；The problem of focal plane imaging mode is expensive and optical path is easy crosstalk is polarized, and ensure that cold stop efficiency, to subtract
Enter the stray radiation on refrigeration detector less.
Obviously, those skilled in the art should be understood that each module of above-mentioned the utility model or each step can be used
General computing device realizes that they can be concentrated on a single computing device, or be distributed in multiple computing device institutes
On the network of composition, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by them
Storage is performed by computing device in the storage device, and in some cases, can be to be different from sequence execution herein
Shown or described step, perhaps they are fabricated to each integrated circuit modules or by multiple moulds in them
Block or step are fabricated to single integrated circuit module to realize.In this way, the utility model be not limited to any specific hardware and
Software combines.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems characterized by comprising same
Infrared Lens group of looking in the distance, Wollaston Wollaston prism, imaging infrared lens group and the detector assembly of axis setting；
The Infrared Lens group of looking in the distance, for it will be compressed from the directional light that its big incident bore receives after, from its osculum
Diameter exports directional light, and is incident on the Wollaston Wollaston prism；
The Wollaston Wollaston prism, for by the directional light resolve into be spatially separating and polarization state mutually just
The two beam polarised lights handed over；
The imaging infrared lens group, for will two beams polarised light convergence simultaneously separate imaging to detector assembly；
The detector assembly, including detector image planes and the cold screen of detector, the detector image planes are inclined for detecting two beams
The two width polarization images that the light that shakes is formed, the cold screen of detector are used to reduce the stray radiation entered on detector assembly.
2. the REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems as described in claim 1, special
Sign is that the Infrared Lens group of looking in the distance specifically includes: multiple and different optical materials have positive light coke or negative power and
The Infrared Lens of coaxial arrangement.
3. the REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems as described in claim 1, special
Sign is, the Wollaston Wollaston prism isosceles right angle trigonometry prism crystal optical cement mutually orthogonal by two blocks of optical axises
It forms.
4. the REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems as described in claim 1, special
Sign is that the cold screen of detector specifically includes:
Diaphragm reduces the stray radiation entered on refrigeration detector for guaranteeing the cold stop efficiency of the imaging optical system.
5. the REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems as described in claim 1, special
Sign is that the Wollaston Wollaston prism material uses magnesium fluoride or other infra-red materials with crystalline nature.
6. the REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems as described in claim 1, special
Sign is that the Wollaston prism is specifically used for:
It is different by the direction of optic axis of two triangular prism grain boundary two sides, make incident ray when by cemented surface by ordinary light
Variation to abnormal light or the variation by abnormal light to ordinary light, make the light of different direction of vibration that different refractions, shape occur
At in two beam polarised lights being spatially separating and polarization state is mutually orthogonal, the two beams polarised light angle β size is 2 (no-ne),
In, noAnd neFor ordinary refraction index in crystal and abnormal optical index.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798980A (en) * | 2019-01-02 | 2019-05-24 | 中国电子科技集团公司第十一研究所 | REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems |
| CN113588216A (en) * | 2021-08-02 | 2021-11-02 | 中国科学院光电技术研究所 | Rapid high-precision calibrating device and method for optical zero position of polaroid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798980A (en) * | 2019-01-02 | 2019-05-24 | 中国电子科技集团公司第十一研究所 | REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems |
| CN113588216A (en) * | 2021-08-02 | 2021-11-02 | 中国科学院光电技术研究所 | Rapid high-precision calibrating device and method for optical zero position of polaroid |
| CN113588216B (en) * | 2021-08-02 | 2023-09-19 | 中国科学院光电技术研究所 | Quick high-precision calibrating device and method for optical zero position of polaroid |
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