CN203606617U - Spectrum image projector - Google Patents
Spectrum image projector Download PDFInfo
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- CN203606617U CN203606617U CN201320739309.3U CN201320739309U CN203606617U CN 203606617 U CN203606617 U CN 203606617U CN 201320739309 U CN201320739309 U CN 201320739309U CN 203606617 U CN203606617 U CN 203606617U
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Abstract
The utility model relates to a spectrum image projector. The spectrum image projector comprises a wide wave band lightening light source, an image modulation unit, a spectrum modulation unit, and a projection optical system, wherein an incidence coupling optical system of the spectrum modulation unit carries out coupling for the light source light beams emitted by the wide wave band lightening light source, the coupled light beams are emitted by a collimation system and processed by a light dividing element to obtain emitting parallel lights with different wave lengths, and then emitting parallel lights are convergent to a space light modulator, the light signal output by the light modulator is outputted to the image modulation unit after being coupled by a emergent coupling optical system, and images of a two-dimensional scene generated by the image modulation unit are projected out through the projection optical system. The spectrum image projector provided by the utility model is capable of carrying out modulation respectively for spectrum information and space information of the lighting light source, so that accurate simulation for scene spectrum information and space information is achieved, and the scene generated by the spectrum image projector is more anastomotic with an actual scene. The result of performance result of the imaging system is made more accurate and reliable, by employing the spectrum image projector to carry out simulation.
Description
Technical field
The utility model relates to a kind of spectrum picture projection arrangement.
Background technology
The scene projector can produce scene image true to nature according to the space of actual typical scene target, spectrum, radiation intensity feature.Imaging system gathers this emulating image, and image recognition circuit is analyzed rear captured target position to this image, produces feedback signal, adjusts in real time orientation, thereby realize target is followed the trail of.The optics scene projector utilizes optical system projection real scene simulated after by computer-generated image, thereby can the in the situation that of simulation test, verify the validity of imaging tracing system.Utilize the scene projector to carry out simulation test, can greatly shorten the cycle of system development, save research fund, therefore developing the high performance scene projector becomes the Important Problems of various countries scientific research personnel research.
According to the difference that uses wave band, the scene projector can be divided into the visible ray scene projector and the large class of the infrared scene projector two.
The visible ray scene projector requires to have high-resolution, high refreshing frequency and higher contrast, has high requirements for output image light stability simultaneously.The at present domestic visible ray scene projector is roughly based on various projection display techniques, as cathode-ray tube display (CRT) technology, digital light processing (DLP) technology, liquid crystal display (LCD) technology etc.The infrared scene projector mainly can be divided three classes: the one, and visible images transformation approach, change type infrared image simulation adopts thin-film transducer directly visible images to be converted to infrared image.The 2nd, direct infrared radiation method, mainly contains electric resistance array, diode laser matrix and infrared CRT.The 3rd, infrared radiation modulation method, mainly contains DMD infrared projection system and infrared liquid crystal light valve.
Along with the development of light spectrum image-forming technology and the demand of high precision imaging simulation, the scene projector has been proposed to new requirement, the spectrum scene projector with high spectral resolution becomes the study hotspot of the current scene projector.
Summary of the invention
The utility model for be the precision problem that the existing scene projector exists, a kind of can modulation the spectrum of scene and spatial information proposed, export the spectrum scene projector of photorealism scene more, for imaging system emulation provides precisely simulation means reliably.
The utility model provides a kind of spectrum scene projector, comprises broadband lighting source, image modulation unit, projection optics system and spectral modulation unit; Described spectral modulation unit comprises incident coupling optical system, slit, collimating optical system, prism, convergence optical system, spatial light modulator and outgoing coupling optical system; After the source light that incident coupling optical system sends broadband lighting source is coupled, enter collimating optical system through slit, the front focus of collimating optical system overlaps with the focus of incident coupling optical system; The directional light of the lineal system of prism alignment outgoing carries out light-splitting processing, and the outgoing directional light of the different wave length obtaining after light splitting is assembled to spatial light modulator through convergence optical system; The light signal of spatial light modulator output exports image modulation unit to after the coupling of outgoing coupling optical system; The two-dimensional scene image that image modulation unit produces projects away image through projection optics system.
The utility model provides the another kind of spectrum scene projector, comprises broadband lighting source, image modulation unit, projection optics system and spectral modulation unit; Described spectral modulation unit comprises incident coupling optical system, slit, collimating mirror, grating, convergence reflex mirror, spatial light modulator and outgoing coupling optical system; After the source light that incident coupling optical system sends broadband lighting source is coupled, enter collimating optical system through slit, the front focus of collimating optical system overlaps with the focus of incident coupling optical system; The directional light of grating pair collimation catoptron outgoing carries out light splitting, and the outgoing directional light of the different wave length obtaining after light splitting is assembled to spatial light modulator through convergence reflex mirror; The light signal of spatial light modulator output exports image modulation unit to after the coupling of outgoing coupling optical system; The two-dimensional scene image that image modulation unit produces projects away image through projection optics system.
Spatial light modulator described in technical solutions of the utility model is Digital Micromirror Device, or is LCD space light modulator.
Compared with the traditional scene projector, the utlity model has following feature:
1, the spectrum scene projector that the utility model provides can be modulated respectively the spectrum of lighting source and spatial information, has realized the accurate simulation of scene spectral information and spatial information, and scene and the actual scene of its generation are more identical.Adopt the spectrum scene projector to carry out analog simulation, the result of imaging system performance test more accurately, reliably.
2, the spectrum scene projector that the utility model provides is the spectral distribution of modulate illumination light and the space distribution of image simultaneously, realizes the projection of spectrum picture.Spectral modulation unit adopts dispersion light splitting mode, has the advantages such as spectral resolution is high, compact conformation; The spectrum of spectral modulation unit by using spatial light modulator after to dispersion light splitting is modulated, and has the advantages such as modulation system is flexible, modulating speed is fast.
3, the spectrum scene projector compact conformation that the utility model provides, adopts Digital Control, and highly versatile, can produce adjustable " high emulation " image scene of spectral distribution.
Accompanying drawing explanation:
The structured flowchart of a kind of spectrum scene projector that Fig. 1 provides for the utility model;
A kind of spectrum scene projector image modulation cellular construction block diagram that Fig. 2 provides for the utility model;
A kind of spectrum scene projector spectral modulation cellular construction block diagram that Fig. 3 provides for the utility model;
The structural representation of the spectral modulation unit that Fig. 4 provides for the utility model embodiment 1;
Fig. 5 is the fundamental diagram that spectral modulation described in the utility model unit carries out spectral modulation;
The fundamental diagram that a kind of spectrum scene projector that Fig. 6 provides for the utility model carries out the projection of spectrum scene;
The structural representation of the spectral modulation unit that Fig. 7 provides for the utility model embodiment 2.
Wherein: 1, incident coupling optical system; 2, slit; 3, collimating optical system; 4, prism; 5, convergence optical system; 6, spatial light modulator; 7, outgoing coupling optical system; 8, collimating mirror; 9, grating; 10, convergence reflex mirror.
Specific embodiments
Below in conjunction with drawings and Examples, a kind of spectrum scene projector described in the utility model is described in further detail.
Embodiment 1
Referring to accompanying drawing 1, the theory diagram of the spectrum scene projector that it provides for the utility model.Broadband illuminator produces the radiation of high strength wide range, and its wavelength band is 0.4～1.1um, comprises light source, the illumination optical system homogenizer etc. of unifying.The required illumination light of rear output is modulated to the spectrum of broadband lighting source emergent light in spectral modulation unit.As required, the illumination light of output can be monochromatic light, can be also the broadband illumination light of spectrum through ovennodulation.Image modulation unit produces the two-dimensional scene image under different wave length illumination light.Projection optics system projects away the image of image modulation unit output.For emergent pupil apart from shorter, bore little and to the projector size situation without specific (special) requirements, the light path design of projection optics system can adopt Polaroid mode.For the situation of large emergent pupil distance and long reach, the secondary imaging mode that can adopt collimator objective and projection objective to combine.
Referring to accompanying drawing 2, the theory diagram of the image modulation unit that it provides for the utility model.Mainly comprise homogenizer, colimated light system and spatial light modulator etc.Spectral modulation unit emergent light, after homogenizer, forms Uniform Illumination light.After colimated light system, lighting space photomodulator.In spatial light modulator, generate the image that needs projection, illumination light generates the space two-dimensional intensity map under specific wavelength after spatial light modulator, and exports projection optics system to.
Referring to accompanying drawing 3, it is the theory diagram of the utility model spectral modulation unit.The illumination light that incident coupling optical system produces illuminator is coupled in slit after assembling.The incident light that enters slit is incident to beam splitter and carries out light splitting after colimated light system collimation.Through beam splitter light splitting, broadband illumination light is broken down into a series of monochromatic collimated beam outgoing, its shooting angle difference of the directional light of different wave length.Convergence system is assembled these monochromatic collimated beams, and spatial light modulator is positioned at the focal plane place of convergence system.The light of the corresponding different wave length of every a line of spatial light modulator, the pixel dimension of spatial light modulator determines the minimum light spectral resolution that spectral modulation unit can reach.By controlling switch and the gray shade scale of spatial light modulator, can regulate according to demand spectrum and the intensity distributions of emergent light.
Referring to accompanying drawing 4, the structural representation of the spectral modulation unit that it provides for the present embodiment, comprises incident coupling optical system 1, slit 2, collimating optical system 3, prism 4, convergence optical system 5, spatial light modulator 6 and outgoing coupling optical system 7.Prism 4 is beam splitter, the directional light of collimation system 3 outgoing carries out light splitting, the outgoing directional light of the different wave length after light splitting is assembled to spatial light modulator 6 through convergence optical system 5, spectrum and the intensity distributions of controlling switch and the gray shade scale adjusting emergent light of spatial light modulator 6, finally export image modulation unit to by outgoing coupling optical system 7.In the present embodiment, spatial light modulator adopts Digital Micromirror Device.
Referring to accompanying drawing 5, it is the schematic diagram that spectral modulation described in the utility model unit carries out spectral modulation.In figure (a) for incident illumination light source is through after light splitting, the distribution of different wavelengths of light in spatial light modulator.Each of spatial light modulator is listed as corresponding to different outgoing wavelength.Row coordinate in wavelength and the spatial light modulator of emergent ray is linear.Regulate switch and the transmitance of each row of spatial light modulator, can control the spectral distribution of emergent ray.(b1) on representation space photomodulator, be maximum corresponding to the pixel transmitance of wavelength X 1, other pixel transmitances are 0, are (c1) corresponding output spectrum; (b2) on representation space photomodulator, be peaked half corresponding to the transmitance of wavelength X 1, other pixel transmitances are 0, are (c2) corresponding output spectrum, and its peak strength is the half of (c1); (b3) on representation space photomodulator, have different transmitances corresponding to the pixel of wavelength X 1～λ 4, other pixel transmitances are 0, (c3) curve of spectrum for exporting.By controlling switch and the gray shade scale of spatial light modulator, can regulate according to demand spectrum and the intensity distributions of emergent light.
Referring to accompanying drawing 6, the fundamental diagram that it carries out the projection of spectrum scene for the utility model generates successively multiple image within a frame period, utilizes " integration " characteristic of Image-forming instrument, produces the image scene output with multispectral characteristic by the stack of image.Wish generates the multispectral image of a width as shown in (a) in figure, need to be divided into t1, t2, t3 and tetra-periods of t4 one frame period, in each period, exported successively red, yellow, and green and blue illumination light by spectral modulation unit, corresponding with it, the gray level image corresponding to red, yellow, and green and blue light is exported successively in image modulation unit in each period.By the image intensity stack in the frame period, obtain required multispectral image.
Referring to accompanying drawing 7, the structural representation of the spectral modulation unit that it provides for the present embodiment, comprising incident coupling optical system 1, slit 2, collimating mirror 8, grating 9, convergence reflex mirror 10, spatial light modulator 6 and outgoing coupling optical system 7.Grating 9 is beam splitter, the directional light of collimation catoptron 8 outgoing carries out light splitting, the outgoing directional light of the different wave length after light splitting is assembled to spatial light modulator 6 through convergence reflex mirror 10, spectrum and the intensity distributions of controlling switch and the gray shade scale adjusting emergent light of spatial light modulator 6, finally export image modulation unit to by outgoing coupling optical system 7.In the present embodiment, spatial light modulator is LCD space light modulator.
Press the technical scheme of embodiment mono-, the required illumination light of rear output is modulated to the spectrum of broadband lighting source emergent light in spectral modulation unit.As required, the illumination light of output can be monochromatic light, can be also the broadband illumination light of spectrum through ovennodulation.
Image modulation unit produces the two-dimensional scene image under different wave length illumination light.Projection optics system projects away the image of image modulation unit output.
Claims (6)
1. a spectrum scene projector, comprises broadband lighting source, and image modulation unit and projection optics system, is characterized in that: it also comprises spectral modulation unit; Described spectral modulation unit comprises incident coupling optical system (1), slit (2), collimating optical system (3), prism (4), convergence optical system (5), spatial light modulator (6) and outgoing coupling optical system (7); After the source light that incident coupling optical system (1) sends broadband lighting source is coupled, enter collimating optical system (3) through slit (2), the front focus of collimating optical system (3) overlaps with the focus of incident coupling optical system (1); The directional light of prism (4) collimation system (3) outgoing carries out light-splitting processing, and the outgoing directional light of the different wave length obtaining after light splitting is assembled to spatial light modulator (6) through convergence optical system (5); The light signal of spatial light modulator (6) output exports image modulation unit to after outgoing coupling optical system (7) coupling; The two-dimensional scene image that image modulation unit produces projects away image through projection optics system.
2. a kind of spectrum scene projector according to claim 1, is characterized in that: described spatial light modulator is Digital Micromirror Device.
3. a kind of spectrum scene projector according to claim 1, is characterized in that: described spatial light modulator is LCD space light modulator.
4. a spectrum scene projector, comprises broadband lighting source, and image modulation unit and projection optics system, is characterized in that: it also comprises spectral modulation unit; Described spectral modulation unit comprises incident coupling optical system (1), slit (2), collimating mirror (8), grating (9), convergence reflex mirror (10), spatial light modulator (6) and outgoing coupling optical system (7); After the source light that incident coupling optical system (1) sends broadband lighting source is coupled, enter collimating optical system (3) through slit (2), the front focus of collimating optical system (3) overlaps with the focus of incident coupling optical system (1); The directional light of grating (9) collimation catoptron (8) outgoing carries out light splitting, and the outgoing directional light of the different wave length obtaining after light splitting is assembled to spatial light modulator (6) through convergence reflex mirror (10); The light signal of spatial light modulator (6) output exports image modulation unit to after outgoing coupling optical system (7) coupling; The two-dimensional scene image that image modulation unit produces projects away image through projection optics system.
5. a kind of spectrum scene projector according to claim 4, is characterized in that: described spatial light modulator is Digital Micromirror Device.
6. a kind of spectrum scene projector according to claim 4, is characterized in that: described spatial light modulator is LCD space light modulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320739309.3U CN203606617U (en) | 2013-11-20 | 2013-11-20 | Spectrum image projector |
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| CN201320739309.3U CN203606617U (en) | 2013-11-20 | 2013-11-20 | Spectrum image projector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577065A (en) * | 2020-12-02 | 2022-06-03 | 北京振兴计量测试研究所 | Excitation source for infrared scene simulation, simulation device and simulation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577065A (en) * | 2020-12-02 | 2022-06-03 | 北京振兴计量测试研究所 | Excitation source for infrared scene simulation, simulation device and simulation method |
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| CF01 | Termination of patent right due to non-payment of annual fee |