CN100595533C - Fourier transform interference spectrometer based on slow ray light velocity controlling technology - Google Patents
Fourier transform interference spectrometer based on slow ray light velocity controlling technology Download PDFInfo
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- CN100595533C CN100595533C CN200810064539A CN200810064539A CN100595533C CN 100595533 C CN100595533 C CN 100595533C CN 200810064539 A CN200810064539 A CN 200810064539A CN 200810064539 A CN200810064539 A CN 200810064539A CN 100595533 C CN100595533 C CN 100595533C
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Abstract
The invention aims to provide a Fourier transformation interferometer spectrometer with high spectral resolution, small volume and high stability. The spectrometer can be used for measuring spectrum and is based on the slow light velocity controllable technology. The spectrometer changes the traveling time of light in limited distance by utilizing the slow light technology, that is, utilizing thetechnology to change the optical path difference between two light paths on the part of interferometer in the spectrometer and enlarging the optical path difference, thereby obviously improving the spectrum sensitivity of the spectrometer, eliminating a control system and a collimating system required for moving a reflecting mirror, simplifying the spectrometer, eliminating vibration and positioning errors and improving stability.
Description
Technical field
The present invention relates to a kind of optical instrument, is exactly a kind of Fourier transform interference spectrometer based on slow ray light velocity controlling technology specifically.
Technical background
In the Fourier transform spectrometer,, most crucial part is an interferometer, is determining highest resolution and other performance index of spectrometer.No matter be the air bearing interferometer, the mechanical bearing interferometer, two index glass mechanical rotation formula interferometers all require a light light path in the two-way light to change, and realize this requirement by mobile index glass usually.But, form to interfere between the two-beam to require index glass and fixed mirror strict vertical.Yet no matter be air bearing method or mechanical bearing method, it is not exclusively vertical that small skew in the index glass moving process or vibration interference all can influence two minute surfaces, even if adopted the dynamic collimation measure, also lag behind, can't eliminate fully, and make equipment more complicated, volume increases, operation inconvenience.In addition, distance that index glass moves and speed all can influence the resolution of interferometer, the long more resolution of displacement is good more in theory, and the interferometer index glass moving range of traditional structure is subjected to the restriction of instrument volume, can not accomplish several meters even tens meters long, this has further limited the resolution of spectrometer.
Summary of the invention
The object of the present invention is to provide a kind ofly can be used for measure spectrum, have the spectral resolution height, volume is little, stability is high Fourier transform interference spectrometer based on slow ray light velocity controlling technology.
The object of the present invention is achieved like this: it is made up of light source, beam splitter, catoptron, slower rays medium, detector, filter amplifier, analog to digital converter, computing machine, light velocity controller and wave band controller, light source optics connects beam splitter, beam splitter optics respectively connects catoptron and slower rays medium, detector connects filter amplifier, filter amplifier connection mode number converter, analog to digital converter connects computing machine, and computing machine connects light velocity controller and wave band controller respectively.
The present invention uses slow ray light velocity controlling technology and replaces the index glass mobile technology, and all fixing structure of this bimirror has effectively overcome interference such as vibration and external disturbance, improves stability.And light velocity controlling technology can obtain very big group delay, is equivalent to the very big index glass displacement in the conventional interference instrument, has effectively improved spectral resolution, has dwindled the volume of instrument.
Description of drawings
Description of drawings
Fig. 1 is conventional interference instrument structure and slower rays interferometer structure contrast synoptic diagram;
Fig. 2 is a structured flowchart of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Embodiment 3: in conjunction with Fig. 2, the light that light source a sends is divided into two-way light through behind the beam splitter.One the tunnel directly gets to catoptron b, and another Lu Zexian gets on the catoptron b through slower rays medium c again.Get back to again on the beam splitter after this two-way light reflection, interfere mutually.Interferogram is received by detector d.The signal that receives twt amplifier e after filtration amplifies, through being input in the computing machine g behind the A/D converter f.The optical path difference of two-way light is sent control signal and is passed through light velocity controller h control by computing machine in the interferometer.Computing machine g is artificial control band simultaneously, the response wave band of beam splitter and controller is selected and is controlled through wave band controller i.
Embodiment 4: in conjunction with Fig. 2, the principle of work of Fourier transform interference spectrometer that the present invention is based on slow ray light velocity controlling technology is as follows: light is through behind the beam splitter, be divided into two-way light, one the tunnel directly gets to catoptron, another Lu Zexian is through the slower rays medium, get on the catoptron, just two catoptrons are all fixed again; The control of optical path difference is to realize by the light velocity of the light of process in the control slower rays medium, like this, instrument is taken up room to be dwindled, and can make the spectral resolution of instrument higher than original spectrometer, because by the slower rays technology, can make group index become very big, in some cases even up to 10
6So, can make the optical path difference of two light beams very big, just can make spectral resolution very high.
The present invention is based on the Fourier transform interference spectrometer of slow ray light velocity controlling technology, also have following technical characterictic:
(1) described Fourier transform interference spectrometer based on slow ray light velocity controlling technology, the two-way reflection of light mirror that interferometer partly forms interference in the optical system are all fixing.
(2) described Fourier transform interference spectrometer based on slow ray light velocity controlling technology utilizes the slower rays medium to change the optical path difference of two-way light in the interferometer.
(3) described Fourier transform interference spectrometer based on slow ray light velocity controlling technology utilizes the group velocity control system to make the light group velocity realize the slower rays transmission in the slower rays medium.
(4) described Fourier transform interference spectrometer based on slow ray light velocity controlling technology, spectral resolution and group index are proportional.
Claims (1)
1. Fourier transform interference spectrometer based on slow ray light velocity controlling technology, it is made up of light source, beam splitter, catoptron, slower rays medium, detector, filter amplifier, analog to digital converter, computing machine, light velocity controller and wave band controller, it is characterized in that: light source optics connects beam splitter, beam splitter optics respectively connects catoptron and slower rays medium, detector connects filter amplifier, filter amplifier connection mode number converter, analog to digital converter connects computing machine, and computing machine connects light velocity controller and wave band controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064539A CN100595533C (en) | 2008-05-19 | 2008-05-19 | Fourier transform interference spectrometer based on slow ray light velocity controlling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064539A CN100595533C (en) | 2008-05-19 | 2008-05-19 | Fourier transform interference spectrometer based on slow ray light velocity controlling technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101294848A CN101294848A (en) | 2008-10-29 |
| CN100595533C true CN100595533C (en) | 2010-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810064539A Expired - Fee Related CN100595533C (en) | 2008-05-19 | 2008-05-19 | Fourier transform interference spectrometer based on slow ray light velocity controlling technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN100595533C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207459B (en) * | 2010-03-31 | 2013-09-04 | 中国科学院电子学研究所 | Fourier transform chip spectrometer based on integrated light technique |
| CN102564354A (en) * | 2011-12-28 | 2012-07-11 | 哈尔滨工业大学 | Angle measuring device and angle measuring method of double-frequency laser interferometer based on slow-light material |
| CN102538715A (en) * | 2011-12-28 | 2012-07-04 | 哈尔滨工业大学 | Dual-frequency laser interferometer straightness measurement device based on slow light materials and measurement method thereof |
| CN103712691A (en) * | 2013-12-23 | 2014-04-09 | 聚光科技(杭州)股份有限公司 | Fourier transformation spectrograph |
| CN103900693B (en) * | 2014-02-18 | 2015-11-18 | 哈尔滨工业大学 | A kind of fast illuminated imaging spectrometer of difference and formation method |
| CN104142179A (en) * | 2014-07-28 | 2014-11-12 | 奉化市宇创产品设计有限公司 | Static fixed mirror interferometer |
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2008
- 2008-05-19 CN CN200810064539A patent/CN100595533C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101294848A (en) | 2008-10-29 |
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Granted publication date: 20100324 Termination date: 20120519 |