Study on the Wavelength Accuracy of the 2-D Slit-Array Hadamard Spectrometer
CHI Ming-bo1, 2, HAO Peng1, WU Yi-hui1*
1. State Key Lab of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The 2-D slit array mask is a new design of Hadamard spectrometer mask. Having discussed the influence of the inconsistency caused by the machining errors in the size and location between the slits in the same column on the wavelength accuracy of the Hadamard spectrometer, the authors bring up with the way to decrease the influence on the wavelength accuracy of the spectrometer caused by the difference in the height and location vertical to the spectrum between the slits in the same column, and then estimate the spectral shift caused by the relative location shift along the spectrum between the slits in the same column. A model for simulation was built, and the measurement errors in the decoded spectrum generated by one column of the slits on the mask were calculated, when there are inconsistency errors in width and location along the spectrum between the slits in another column. Based on the simulation calculation, we can determine the machining precision of the mask. The research will be meaningful to the design of the 2-D slit array mask using MEMS(micro-electro-mechanism system) technique and the revise of the decoded spectrum, which can provide the spectrometer with a reasonable wavelength accuracy.
[1] TANG Hong-wu, ZHOU Jin-song, LI Tao, et al(唐宏武,周锦松,李 涛,等). Chinese Journal of Analytical Chemistry(分析化学), 2005, 33(3): 417. [2] JIA Hui, LI Fu-tian(贾 辉,李福田). Opto-Electronic Engineering(光电工程),2003, 30(4): 53. [3] Tilotta D C, Hammaker R M, Fateley W G. Applied Spectroscopy, 1987, 41(5): 727. [4] LIU Jia, CHEN Fen-fei, LIAO Cheng-sheng, et al(刘 佳,陈奋飞,廖乘胜,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2011, 31(10):2874. [5] FAN Yu, WU Yi-hui, XUAN Ming, et al(范 玉,吴一辉,宣 明,等). Optics and Precision Engineering(光学精密工程),2009, 17(11): 2724. [6] Hanley Q S. Applied Spectroscopy, 2001, 55(3): 318. [7] JIA Hui, YAO Yong(贾 辉,姚 勇). Acta Photonica Sinica(光子学报),2007, 36(2):294. [8] Martin Harwit, Sloane N J A. Hadamard Transform Optics. New York: Academic Press, 1979. [9] ZHOU Jin-song, Lü Qun-bo, XIANGLI Bin(周锦松,吕群波,相里斌). Acta Photonica Sinica(光子学报),2005, 34(10): 1518. [10] Love S P. SPIE, 2009, 7210: 721007.