CN203688067U - Digital controllable spectroscopic light source system - Google Patents
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- CN203688067U CN203688067U CN201320887442.3U CN201320887442U CN203688067U CN 203688067 U CN203688067 U CN 203688067U CN 201320887442 U CN201320887442 U CN 201320887442U CN 203688067 U CN203688067 U CN 203688067U
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Abstract
The utility model relates to a digital controllable spectroscopic light source system, which belongs to the technical field of optical illumination detection. Optical radiation signals emitted from an illumination light source subsystem are coupled and then enter a digital spectral gating subsystem, and signals are output from a spectroscopic mixed-output subsystem to a spectroscopic detection subsystem; and the spectroscopic detection subsystem outputs feedback signals to a control processing subsystem, and a control processing subsystem outputs signals to a control digital spectral gating subsystem. The digital spectral gating subsystem adopts a concentrically-symmetrically convex raster Offner spectral structure with small original aberration to disperse light radiation at the output end of light guide fiber optics bundles, and dispersed spectrums are arranged uniformly with high spectral resolution. The structure is of a pure reflection type, has no chromatic aberration, is applicable for relatively wide spectrums and makes for system miniaturization; and a DMD and the Offner spectral structure are combined in order to realize digital modulation gating of the spectral signals, with strong controllability, high fidelity and quick response speed.
Description
Technical field
The utility model relates to a kind of digital controllable spectrum light-source system, belongs to illumination optical detection technique field.
Background technology
Controllable spectrum light source can produce according to application demand difference the light source simulating devices of special spectrum shape and radiation intensity output as a kind of, in the numerous areas such as biological and agricultural sciences, materialogy, environmental monitoring, machine vision, Lighting Design, national defense and military, the Aero-Space demand that has a wide range of applications, therefore research and develop a kind of high precision, spectroscopic light source system that controlledization degree is high has important practical significance.
The spectroscopic light source simulator of traditional form adopts Halogen lamp LED as source light more, and it is carried out to simple modulation output.Although this technology is comparatively ripe, is limited to mechanical-optical setup, system bulk is large, complex structure, expensive; And the spectrum tunability of such simulator is low, has increased the difficulty of matching with real goal spectrum.
Along with scientific and technological progress, especially novel solid illumination component---appearance and the application of light emitting diode (LED), a kind of LED-based controllable spectrum light source simulator arises at the historic moment.It,, by the Combinatorial Optimization to LED kind and quantity, realizes the modulation of system output spectrum light intensity.Although than traditional halogen light source, LED has the advantages such as volume is little, the life-span is long, reaction velocity is fast, luminescence efficiency is high, stability is strong.But in the market, the LED unit of the spectral coverage wide coverage of making uniform and peak wavelength interval narrower (<5nm) is but comparatively difficult.This has restricted the convenience that system realizes high precision, high-fidelity output spectral line to a great extent.
Be accompanied by the introducing of other photoelectron components and parts, as liquid crystal on silicon (LCOS) and Digital Micromirror Device (DMD), the higher spectroscopic light source of a collection of controlledization of numeral degree occurs in succession.It mainly, by the coordinating of light-splitting device and LCOS/DMD, realizes the digital gating of system output spectrum light intensity.At present, the spectrum light splitting of such light source simulator is many is realized by the dispersion of plane grating or prism.Along with the raising of relative aperture, the complexity of the collimation matching with plane grating---collecting optics structure increases, and causes systems radiate energy transmitance to decline; And the linear dispersion of prism is not ideal enough, the compactedness of system architecture is not strong.In such light source, the spectroscopic light source based on LCOS is often subject to material mission life, manufacture craft, temperature and floats etc. the frustration of factor.By contrast, DMD because its contrast is high, resolution is high, reaction velocity is fast, high, the low cost and other advantages of controllability and good uniformity, technology maturation, yield rate, in digital controllable spectrum light source, have more application advantage.
From the development course of domestic and international related work, develop that a kind of output spectrum fidelity is high, spectrum and radiation controllability strong, system repairability is good, compact conformation is simple and cost is lower, especially by means of the controllable spectrum light-source system of advanced photoelectricity numeralization equipment, be focus and the trend of this area research.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of high precision, spectroscopic light source system that controlledization degree is high.
The technical scheme that the utility model is sent out is to provide a kind of digital controllable spectrum light-source system, and it comprises lighting source subsystem, light splitting digital gating subsystem, spectral mixing output subsystem, spectrum monitoring subsystem and controls processing subsystem; The optical radiation signal that lighting source subsystem sends is through being coupled into light splitting digital gating subsystem, then outputs signal to spectral detection subsystem through spectral mixing output subsystem; Spectral detection subsystem output feedback signal, to controlling processing subsystem, is controlled processing subsystem and is outputed signal to control light splitting digital gating subsystem.
Described lighting source subsystem comprises broad spectrum light source, parabolic concentrator, kohler's illumination lens combination and light-conductive optic fibre bundle, broad spectrum light source is placed in parabolic concentrator mirror foci place, and the optical radiation that broad spectrum light source sends is coupled into light splitting digital gating subsystem through kohler's illumination lens combination and light-conductive optic fibre bundle.
Described light splitting digital gating subsystem comprises slit diaphragm, convex grating, concave mirror, Digital Micromirror Device DMD and light absorber, the parasitic light of light-conductive optic fibre bundle output in slit diaphragm restriction lighting source subsystem, convex grating forms concentric symmetrical Offner type beam-splitting structure with concave mirror, the Digital Micromirror Device DMD by the even dispersion of optical radiation of light-conductive optic fibre bundle output to focal plane place.
Described spectral mixing output subsystem comprises concave mirror, plane mirror, integrator and lens; The dispersed light of light splitting digital gating subsystem output is coupled to integrator through concave surface and plane mirror, through lens, the dispersed light radiation of digitizing gating is mixed to output.
Described spectrum monitoring subsystem comprises beam splitter, lens, spectrometer.
Described control processing subsystem comprises central processing unit and High-speed Control treatment circuit.
A preferred version of the present utility model is: the incident end of light-conductive optic fibre bundle is the circular end surface of some single light-conductive optic fibre compositions, and the exit end of light-conductive optic fibre bundle is that corresponding light-conductive optic fibre is arranged the linear end face forming.
The principle of work of the digital controllable spectrum light-source system that the utility model provides is: lighting source subsystem is by source light---the optical radiation signal that broad spectrum light source sends is coupled into light splitting digital gating subsystem, and through the latter's dispersion light splitting and Digital Modulation gating laggard enter spectral mixing output subsystem output, spectral detection subsystem Real-Time Monitoring mixes the spectral signal of output and feeds back to control processing subsystem, by the latter, the spectrum of signal is formed and analyzes with intensity and compare with target light radiation signal, according to the state of the Digital Micromirror Device DMD in both difference Real-time compensation control light splitting digital gating subsystems, thereby realize real time calibration and modulation with intensity to the spectrum formation of whole digital controllable spectrum light-source system output optical radiation signal.
Compared with prior art, the utility model has the advantages that:
1, the light splitting digital gating subsystem that technical solutions of the utility model provide, use that intrinsic aberration is little, the convex grating Offner beam-splitting structure of concentric symmetry carries out dispersion to the optical radiation of light-conductive optic fibre bundle output terminal, the even row of spectrum after dispersion, spectral resolution are high, this structure adopts pure reflective, no color differnece, be applicable to compared with wide spectrum, be conducive to the miniaturization of system; The mode that adopts DMD to combine with convex grating Offner beam-splitting structure, realizes the Digital Modulation gating to spectral signal, and controllability is strong, fidelity is high, fast response time.
2, between the lighting source subsystem in technical solutions of the utility model and light splitting digital gating subsystem, pass through the light-conductive optic fibre bundle cascade of special end face, coordinate the optimization of kohler's illumination lens combination to utilize source light signal, strengthened the convenience of system modular;
3, the spectroscopic light source system that the utility model provides can be exported as requested special spectrum and form and the light signal of intensity, and system output spectrum degree of distortion is little, Digital Control degree is high, compact conformation, real-time are good.
Accompanying drawing explanation:
The structural representation of the digital controllable spectrum light-source system that Fig. 1 provides for the utility model;
The schematic diagram of light-conductive optic fibre bundle incident end face in the digital controllable spectrum light-source system that Fig. 2 provides for the utility model embodiment;
The schematic diagram of light-conductive optic fibre bundle outgoing end face in the digital controllable spectrum light-source system that Fig. 3 provides for the utility model embodiment;
In figure, 1, lighting source subsystem, comprise 11, paraboloidal mirror, 12, light source, 13, kohler's illumination lens combination, 14, light-conductive optic fibre bundle; 2, light splitting digital gating subsystem, comprising: 21, slit diaphragm, 22, concave mirror, 23, convex grating, 24, concave mirror, 25, Digital Micromirror Device, 26, light absorber; 3, spectral mixing output subsystem, comprising: 31, concave mirror, 32, plane mirror, 33, integrating rod, 34, lens; 4, spectrum monitoring subsystem, comprising: 41, beam splitter, 42, lens, 43, spectrometer; 5, control processing subsystem, comprising: 51, central processing unit (computer), 52, High-speed Control treatment circuit.
Embodiment
Below in conjunction with drawings and Examples, the digital controllable spectrum light-source system of one described in the utility model is described in further detail.
Embodiment 1
Referring to accompanying drawing 1, the structural representation of the digital controllable spectrum light-source system that it provides for the present embodiment.This system comprises lighting source subsystem 1, light splitting digital gating subsystem 2, spectral mixing output subsystem 3, spectrum monitoring subsystem 4 and controls processing subsystem 5.
In figure, the structure of lighting source subsystem 1 comprises the light-conductive optic fibre bundle 14 of parabolic concentrator 11, broad spectrum light source 12, kohler's illumination lens combination 13 and special end face.Broad spectrum light source 12 can, according to different application scenarioss, be made corresponding selection, and as Halogen lamp LED, black matrix, white light LEDs, composite light source etc., adopting in the present embodiment wavelength coverage is that the white light LEDs of 300～800nm is as broad spectrum light source.The optical radiation that kohler's illumination lens combination 13 is sent the broad spectrum light source 12 that is placed in parabolic concentrator 11 focus places evenly converges to the incident end face of light-conductive optic fibre bundle 14, and transfers to the slit diaphragm 21 place's coupling matchings in light splitting digital gating subsystem 2 through light-conductive optic fibre bundle 14.
Kohler's illumination lens combination 13 is made up of three lens, and first lens front surface is 14.9 ± 0.1mm apart from broad spectrum light source 12, and front surface radius is-152.169mm, and thickness is 6.1 ± 0.1mm, and rear surface radius is-20.561mm; Second lens and first lenticular spacing 2.0 ± 0.1mm, front surface radius-367.106mm, thickness 5.5 ± 0.1mm, rear surface radius-32.995mm; The 3rd lens and second lenticular spacing 2.0 ± 0.1mm, front surface radius-98.298mm, thickness 5.5 ± 0.1mm, rear surface radius-63.119mm, rear surface is apart from light-conductive optic fibre bundle 14 incident end face 33.0mm.
The structure of light splitting digital gating subsystem 2 comprises slit diaphragm 21, concave mirror 22, convex grating 23, concave mirror 24, Digital Micromirror Device 25, light absorber 26.Slit diaphragm 21 limits the parasitic light of light-conductive optic fibre bundle 14 outputs in lighting source subsystem, convex grating 23 is positioned on Rowland circle with concave mirror 22 and 24 and has formed the Offner type beam-splitting structure of concentric symmetry, and the even dispersion of optical radiation that light-conductive optic fibre bundle 14 is exported is to the Digital Micromirror Device 25 at focal plane place, by to each tiny mirror in Digital Micromirror Device 25 towards digitizing gating realize different spectrum and form and the control of intensity, useless parasitic light is eliminated by light absorber 26.In the present embodiment, adopting slit diaphragm 21 is highly 14.1mm, and width is 13.68um.In described Offner type beam-splitting structure, convex grating 23 bores are 33mm, and radius-of-curvature is 152.7mm, and demand pairs are 268lp/mm, and the radius-of-curvature of concave mirror 22 and 24 is respectively 299.68mm and 299.67mm, and bore is respectively 99.50mm and 83.48mm.The spectral coverage working range of beam-splitting structure is 380～780nm, can carry out as required respective design modification.The resolution of described digital micro-mirror array 25 is 1024 × 768, one dimension is dispersion dimension direction, and another dimension is space dimension direction, and each micromirror size is 13.68 μ m × 13.68 μ m, each micro mirror has-12 ° and+12 ° of two angle of deviation, represents respectively extinction and logical light duty.Extinction duty reflexes to light absorber 26 by dispersed light and absorbs, and logical light duty reflexes to spectral mixing output subsystem gating by dispersed light.The number of the digital micro-mirror in extinction and logical light duty has determined the power of dispersed light amplitude modulation(PAM).The extinction element that described light absorber 26 can be crossed by blackening process is realized.
The structure of spectral mixing output subsystem 3 comprises concave mirror 31, plane mirror 32, integrator 33 and lens 34, the dispersed light that light splitting digital gating subsystem 2 is exported is coupled to integrator 33 through concave surface 31 and plane 32 catoptrons, by lens 34 outgoing, make the dispersed light radiation of digitizing gating mix output.Its structure setting and output spectrum scope are mated decision by light splitting digital gating subsystem 2.Integrator 33 plays the effect that the light signal of dispersion is spatially mixed, and can be the form such as integrating sphere, integrating rod, adopts in the present embodiment integrating rod.
The structure of spectrum monitoring subsystem 4 comprises beam splitter 41, lens 42, spectrometer 43, realizes the monitoring feedback to spectral mixing output subsystem 3 output terminal light signals.Beam splitter 41 is semi-transparent semi-reflective, and lens 42 play the effect that light signal is coupled into spectrometer 43, and the work spectral coverage scope of spectrometer 43 contains the output spectrum scope of spectral mixing output subsystem 3.
The structure of controlling processing subsystem 5 comprises central processing unit 51 and High-speed Control treatment circuit 52, by the monitor signal that in spectrum monitoring subsystem 4, spectrometer 43 feeds back to is analyzed, through High-speed Control treatment circuit 52, the state orientation of each tiny mirror in real-time optimization Digital Micromirror Device 25, the difference between output spectrum and the target spectral line of compensating digits controllable spectrum light-source system.In the present embodiment, central processing unit 51 is high performance computing machine, and High-speed Control treatment circuit 52 is based on FPGA(field programmable gate array) pcb board, it is controlled processing speed and Digital Micromirror Device 25 and matches.
In the present embodiment, the work spectral coverage of whole digital controllable spectrum light-source system is 380～780nm, but applicable spectral range of the present invention is not limited only to this in principle, can carries out corresponding rational design to lighting source subsystem, light splitting digital gating subsystem, spectral mixing output subsystem and spectrum monitoring subsystem according to target call and realize.
Shenfu Fig. 2 and 3, they are respectively the schematic diagram of light-conductive optic fibre bundle incident end face and outgoing end face in the present embodiment; As shown in Figure 3, incident end is the circular end surface of some single light-conductive optic fibre compositions, with the emergent pupil coupling matching of kohler's illumination lens combination 13 in accompanying drawing 1; As shown in Figure 3, exit end is that corresponding light-conductive optic fibre is arranged the linear end face forming, with slit diaphragm 21 coupling matchings in accompanying drawing 1.
Claims (7)
1. a digital controllable spectrum light-source system, is characterized in that: it comprises lighting source subsystem (1), light splitting digital gating subsystem (2), spectral mixing output subsystem (3), spectrum monitoring subsystem (4) and controls processing subsystem (5); The optical radiation signal that lighting source subsystem sends is through being coupled into light splitting digital gating subsystem, then outputs signal to spectral detection subsystem through spectral mixing output subsystem; Spectral detection subsystem output feedback signal, to controlling processing subsystem, is controlled processing subsystem and is outputed signal to control light splitting digital gating subsystem.
2. the digital controllable spectrum light-source system of one according to claim 1, it is characterized in that: described lighting source subsystem comprises broad spectrum light source (12), parabolic concentrator (11), kohler's illumination lens combination (13) and light-conductive optic fibre bundle (14), broad spectrum light source is placed in parabolic concentrator mirror foci place, and the optical radiation that broad spectrum light source sends is coupled into light splitting digital gating subsystem through kohler's illumination lens combination and light-conductive optic fibre bundle.
3. the digital controllable spectrum light-source system of one according to claim 1, it is characterized in that: described light splitting digital gating subsystem comprises slit diaphragm (21), convex grating (23), concave mirror (22), Digital Micromirror Device DMD(25) and light absorber (26), the parasitic light of light-conductive optic fibre bundle output in slit diaphragm restriction lighting source subsystem, convex grating forms concentric symmetrical Offner type beam-splitting structure with concave mirror, the Digital Micromirror Device DMD by the even dispersion of optical radiation of light-conductive optic fibre bundle (14) output to focal plane place.
4. the digital controllable spectrum light-source system of one according to claim 1, is characterized in that: described spectral mixing output subsystem comprises concave mirror (31), plane mirror (32), integrator (33) and lens (34); The dispersed light of light splitting digital gating subsystem output is coupled to integrator (33) through concave surface (31) and plane (32) catoptron, through lens (34), the dispersed light radiation of digitizing gating is mixed to output.
5. the digital controllable spectrum light-source system of one according to claim 1, is characterized in that: described spectrum monitoring subsystem comprises beam splitter (41), lens (42), spectrometer (43).
6. the digital controllable spectrum light-source system of one according to claim 1, is characterized in that: described control processing subsystem comprises central processing unit (51) and High-speed Control treatment circuit (52).
7. the digital controllable spectrum light-source system of one according to claim 2, it is characterized in that: the incident end of light-conductive optic fibre bundle (14) is the circular end surface of some single light-conductive optic fibre compositions, and the exit end of light-conductive optic fibre bundle is that corresponding light-conductive optic fibre is arranged the linear end face forming.
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Cited By (13)
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| CN103698007A (en) * | 2013-12-31 | 2014-04-02 | 苏州大学 | Digital-controllable spectroscopic light source system and regulation and control method thereof |
| CN104316172A (en) * | 2014-10-09 | 2015-01-28 | 中国科学院上海光学精密机械研究所 | Energy detection device for photoetching machine |
| CN105301769A (en) * | 2015-11-23 | 2016-02-03 | 福州大学 | Realization method of programmable light source system based on DMD |
| CN106017508A (en) * | 2016-05-26 | 2016-10-12 | 长春理工大学 | Waveform-continuously-adjustable broad spectrum uniform light source for star simulator |
| CN107607518A (en) * | 2017-10-12 | 2018-01-19 | 重庆邮电大学 | Solution cathode glow discharging direct-reading spectrometer |
| CN108627248A (en) * | 2018-05-08 | 2018-10-09 | 中国科学院合肥物质科学研究院 | A kind of spectrometer of digital micromirror array and difference interference combined modulation |
| CN108827469A (en) * | 2018-06-29 | 2018-11-16 | 长春理工大学 | DMD space dimension encodes symmetrical Offner dispersion Dual band IR optical spectrum imaging device |
| CN108896180A (en) * | 2018-06-29 | 2018-11-27 | 长春理工大学 | DMD spectrum dimension coding double light path Offner division light medium-wave infrared optical spectrum imaging device |
| CN108896179A (en) * | 2018-06-29 | 2018-11-27 | 长春理工大学 | DMD space dimension encodes symmetrical Offner dispersion medium-wave infrared optical spectrum imaging device |
| CN108896183A (en) * | 2018-06-29 | 2018-11-27 | 长春理工大学 | Aperture encoded-polarization optical spectrum imaging device |
| CN110260799A (en) * | 2019-07-29 | 2019-09-20 | 海伯森技术（深圳）有限公司 | A kind of Spectral Confocal displacement sensor |
| CN111007006A (en) * | 2019-11-25 | 2020-04-14 | 东北大学 | Multispectral modulation output light source device |
| CN112255181A (en) * | 2020-10-19 | 2021-01-22 | 北京微芯区块链与边缘计算研究院 | Miniature spectrometer for water quality on-line monitoring |
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- 2013-12-31 CN CN201320887442.3U patent/CN203688067U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103698007B (en) * | 2013-12-31 | 2016-01-20 | 苏州大学 | A kind of digital-controllable spectroscopic light source system and regulate and control method thereof |
| CN103698007A (en) * | 2013-12-31 | 2014-04-02 | 苏州大学 | Digital-controllable spectroscopic light source system and regulation and control method thereof |
| CN104316172A (en) * | 2014-10-09 | 2015-01-28 | 中国科学院上海光学精密机械研究所 | Energy detection device for photoetching machine |
| CN105301769A (en) * | 2015-11-23 | 2016-02-03 | 福州大学 | Realization method of programmable light source system based on DMD |
| CN106017508A (en) * | 2016-05-26 | 2016-10-12 | 长春理工大学 | Waveform-continuously-adjustable broad spectrum uniform light source for star simulator |
| CN107607518A (en) * | 2017-10-12 | 2018-01-19 | 重庆邮电大学 | Solution cathode glow discharging direct-reading spectrometer |
| CN107607518B (en) * | 2017-10-12 | 2024-05-24 | 重庆邮电大学 | Solution cathode glow discharge direct-reading spectrometer |
| CN108627248B (en) * | 2018-05-08 | 2020-06-19 | 中国科学院合肥物质科学研究院 | Spectrometer with digital micromirror array and heterodyne interference combined modulation |
| CN108627248A (en) * | 2018-05-08 | 2018-10-09 | 中国科学院合肥物质科学研究院 | A kind of spectrometer of digital micromirror array and difference interference combined modulation |
| CN108896180A (en) * | 2018-06-29 | 2018-11-27 | 长春理工大学 | DMD spectrum dimension coding double light path Offner division light medium-wave infrared optical spectrum imaging device |
| CN108896183A (en) * | 2018-06-29 | 2018-11-27 | 长春理工大学 | Aperture encoded-polarization optical spectrum imaging device |
| CN108896183B (en) * | 2018-06-29 | 2020-05-01 | 长春理工大学 | Aperture coding polarization spectrum imaging device |
| CN108896179A (en) * | 2018-06-29 | 2018-11-27 | 长春理工大学 | DMD space dimension encodes symmetrical Offner dispersion medium-wave infrared optical spectrum imaging device |
| CN108827469A (en) * | 2018-06-29 | 2018-11-16 | 长春理工大学 | DMD space dimension encodes symmetrical Offner dispersion Dual band IR optical spectrum imaging device |
| CN110260799A (en) * | 2019-07-29 | 2019-09-20 | 海伯森技术（深圳）有限公司 | A kind of Spectral Confocal displacement sensor |
| CN111007006A (en) * | 2019-11-25 | 2020-04-14 | 东北大学 | Multispectral modulation output light source device |
| CN111007006B (en) * | 2019-11-25 | 2021-11-26 | 东北大学 | Multispectral modulation output light source device |
| CN112255181A (en) * | 2020-10-19 | 2021-01-22 | 北京微芯区块链与边缘计算研究院 | Miniature spectrometer for water quality on-line monitoring |
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