光谱学与光谱分析 |
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Development of Micro-Spectrometer with a Function of Timely Temperature Compensation |
BAO Jian-guang, LIU Zheng-kun*, CHEN Huo-yao, LIN Ji-ping, FU Shao-jun |
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China |
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Abstract Temperature drift will be brought to Micro-Spectrometer used for demodulating the Varied Line-Space(VLS) grating position sensor on aircraft due to high-low temperature shock. We successfully made a Micro-Spectrometer, for the VLS grating position sensor on aircraft,which still have stable output under temperature shock enviro nment. In order to present a real time temperature compensation scheme, the effects temperature change has on Micro-Spectrometer are analyzed and the traditional cross Czerny-Turner(C-T)optical structure is optimized. Both optical structures are analyzed by optics design software ZEMAX and proved that comparedwithtraditional cross C-T optical structure, the newone can accomplish not only smaller spectrum drift but also spectrum drift with better linearity. Based on the new optical structure. The scheme of using reference wavelength to accomplish real time temperature compensation was proposed and a Micro-fiber Spectrometer was successfully manufactured, whith is with Volume of 80 mm×70 mm×70 mm, integration time of 8~1 000 ms and FullWidthHalfMaximum(FWHM) of 2 nm. Experiments show that the new spectrometer meets the design requirement. Under high temperature in the range of nearly 60 ℃, the standard error of wavelength of this new spectrometer is smaller than 0.1 nm, and the maximum error of wavelength is 0.14 nm, which is much smaller than required 0.3 nm. Innovations of this paper are the schemeof real time temperature compensation, the new cross C-T optical structure and a Micro-fiber Spectrometer based on it.
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Received: 2014-03-04
Accepted: 2014-06-25
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Corresponding Authors:
LIU Zheng-kun
E-mail: zhkliu@ustc.edu.cn
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