CN102507443A - Broadband multi-LED light source synthesizer for near infrared spectroscopy analysis - Google Patents
Broadband multi-LED light source synthesizer for near infrared spectroscopy analysis Download PDFInfo
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- CN102507443A CN102507443A CN2011103378189A CN201110337818A CN102507443A CN 102507443 A CN102507443 A CN 102507443A CN 2011103378189 A CN2011103378189 A CN 2011103378189A CN 201110337818 A CN201110337818 A CN 201110337818A CN 102507443 A CN102507443 A CN 102507443A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 18
- 238000004497 NIR spectroscopy Methods 0.000 title 1
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract 2
- 238000003786 synthesis reaction Methods 0.000 claims abstract 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000010183 spectrum analysis Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
用于近红外光谱分析中宽波段多LED光源合成装置，涉及近红外光谱仪的宽波段组合光源设计领域。它解决现有近红外光谱分析中信号弱、信噪比低、单个LED光源带宽窄的问题，本发明采用不同中心波长的LED作为点光源，经过由准直镜、平面光栅和聚焦镜组成的光学系统，从而获得宽波段的多LED组合光源。本发明实现了宽波段多LED组合光源的获取，结构简单、亮度高、波长范围宽，本发明适用于近红外光谱分析工程。
The invention relates to a wide-band multi-LED light source synthesis device for near-infrared spectrum analysis, and relates to the field of design of wide-band combined light sources for near-infrared spectrometers. It solves the problems of weak signal, low signal-to-noise ratio, and narrow bandwidth of a single LED light source in the existing near-infrared spectrum analysis. Optical system, so as to obtain a broadband multi-LED combined light source. The invention realizes the acquisition of a wide-band multi-LED combination light source, has simple structure, high brightness and wide wavelength range, and is suitable for near-infrared spectrum analysis engineering.
Description
Technical field
The present invention relates to the design field of many LED of broadband combined light source, be specially adapted to broadband light source required in the near-infrared spectrum analysis.
Background technology
The light source of tradition near infrared spectrometer is main with halogen tungsten lamp, stable performance, and the life-span is long.But brightness is relatively low, under equal conditions, has limited the signal to noise ratio (S/N ratio) of instrument.Led light source makes it be applied to receive in the near-infrared spectrometers numerous scholars' concern owing to have advantages such as brightness height, life-span length.
Conventional near-infrared spectrometers need be chosen the characteristic wavelength of this material when material is carried out qualitative or quantitative test, the characteristic wavelength of choosing is many more, and measuring accuracy is high more.But single led bandwidth is narrower, has only 50-100nm, in this bandwidth range, is difficult to find a plurality of satisfactory characteristic wavelengths, can not satisfy the requirement of near-infrared spectrum analysis.Therefore, the combined light source of studying the many LED of a kind of broadband has crucial meaning to near-infrared spectral analysis technology.
Summary of the invention
The present invention is weak for signal in the existing near-infrared spectrum analysis of solution, the problem of low, the single led strip of light width of signal to noise ratio (S/N ratio), and a kind of many led light sources of near-infrared spectrum analysis broadband synthesizer that is used for is provided.
Be used for many led light sources of near-infrared spectrum analysis broadband synthesizer, this device comprises n LED pointolite, collimating mirror, plane grating and focus lamp; N LED pointolite sends light beams of different wavelengths, and said light beams of different wavelengths is converged by the light beam of plane grating with identical wavelength after being directional light through the collimating mirror collimation, finally through focus lamp light beams of different wavelengths is focused to pointolite.
Beneficial effect of the present invention: the present invention adopts n LED pointolite to send light beams of different wavelengths; The final pointolite of realizing that light beam is assembled; Has the brightness height; The advantage that wide waveband, life-span are long, the light source that the present invention synthesized are used for near-infrared spectrum analysis and compare significantly with the bandwidth range of single led light source and widened.
Description of drawings
Fig. 1 is the structural representation that is used for many led light sources of near-infrared spectrum analysis broadband synthesizer of the present invention.
Among the figure: 1, LED pointolite, 2, collimating mirror, 3, plane grating, 4, focus lamp, 5, pointolite.
Embodiment
Embodiment one, combination Fig. 1 explain this embodiment, are used for many led light sources of near-infrared spectrum analysis broadband synthesizer, and this device comprises that n centre wavelength is λ
1, λ
2... λ
nLED pointolite 1, collimating mirror 2, plane grating 3 and focus lamp 4.It is λ that n LED pointolite 1 sends wavelength
1, λ
2... λ
nLight, be directional light through collimating mirror 2 collimations after, converge by the light of plane grating 3 same wavelength, finally the light of different wave length is focused to pointolite 5 through focus lamp 4, the wavelength band of gained combined light source is λ
1～λ
n, wavelength band is significantly widened.In near-infrared spectrum analysis, can select the LED of corresponding centre wavelength according to the analyze demands of different material.
This embodiment is selected combined light source that a plurality of LED the build light source as near-infrared spectrometers for use, has the brightness height, wide waveband, long advantage of life-span, the bandwidth that can widen single led light source effectively.It is λ that the present invention adopts n centre wavelength
1, λ
2... λ
nLed light source.
Embodiment two, this embodiment are that said many led light sources of the broadband synthesizer that is used for near-infrared spectrum analysis of embodiment one should be in the concrete adjustment process of middle many LED of broadband combined light source of near-infrared spectrum analysis:
One,, chooses n LED, the central wavelength lambda of n LED according to the characteristic wavelength that utilizes material that near-infrared spectral analysis technology is surveyed at near-infrared band
1, λ
2... λ
nShould cover the required characteristic wavelength of the material of surveying, n is the positive integer greater than 1;
Two, the light that n LED is sent is that wavelength is λ through collimating mirror 2 collimations earlier
1, λ
2... λ
nN bundle directional light after, utilize plane grating 3 with a branch of polychromatic light of the light compositing of different wave length, through focus lamp 4 polychromatic light is assembled at last and is pointolite 5, the wavelength band of gained combined spot light source 5 is λ
1-λ
n
Three, regulate the relative position of collimating mirror 2, plane grating 3 and focus lamp 4, make synthetic LED pointolite 1 brightness the strongest.
The synthetic broadband led light source of the optical system that the present invention utilizes grating to build.The light source that is synthesized is used for near-infrared spectrum analysis and compares single led light source, and bandwidth range is significantly widened.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103378189A CN102507443A (en) | 2011-10-31 | 2011-10-31 | Broadband multi-LED light source synthesizer for near infrared spectroscopy analysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103378189A CN102507443A (en) | 2011-10-31 | 2011-10-31 | Broadband multi-LED light source synthesizer for near infrared spectroscopy analysis |
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| Publication Number | Publication Date |
|---|---|
| CN102507443A true CN102507443A (en) | 2012-06-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487400A (en) * | 2013-10-15 | 2014-01-01 | 无锡艾科瑞思产品设计与研究有限公司 | Near infrared household food detection device and method |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN103983430A (en) * | 2014-04-25 | 2014-08-13 | 中国科学院长春光学精密机械与物理研究所 | Device and method for testing out-band relative spectral responsivity of solar blind ultraviolet image intensifier |
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| CN101666679A (en) * | 2009-09-10 | 2010-03-10 | 中国计量学院 | Quasi-continuous light splitting system based on narrow-band LED light source group |
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| CN102109379A (en) * | 2010-12-14 | 2011-06-29 | 中国科学院长春光学精密机械与物理研究所 | Optical device for wide waveband plane grating dispersion type imaging spectrometer |
| CN201973575U (en) * | 2011-01-14 | 2011-09-14 | 苏州生物医学工程技术研究所 | Multispectral compact type LED (light-emitting diode) all solid-state optical source system |
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- 2011-10-31 CN CN2011103378189A patent/CN102507443A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487400A (en) * | 2013-10-15 | 2014-01-01 | 无锡艾科瑞思产品设计与研究有限公司 | Near infrared household food detection device and method |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN103983430A (en) * | 2014-04-25 | 2014-08-13 | 中国科学院长春光学精密机械与物理研究所 | Device and method for testing out-band relative spectral responsivity of solar blind ultraviolet image intensifier |
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Application publication date: 20120620 |