2 February 2009 Analysis of a Hadamard transform near-infrared spectrometer based on grating light modulator
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Abstract
This paper proposes a novel Hadamard Transform near-infrared spectrometer based on MOEMS(Optical micro-electro-mechanical system ) grating light modulator. A new method that grating light modulator combined with a single near -infrared detector to detect spectrum is applied. The programmability of the grating light modulator linear array is used to implement a Hadamard Transform encoding masks. Firstly, optics theory has been used to analyze the essential principle of the spectrometer and the optical principle of grating light modulator. Then, It is theoretically proved that the Hadamard Transform near-infrared spectrometer can reconstruct spectrum effectively and have a high signal noise ratio. Finally, a new structure of the grating light modulator is given. Results of the software simulation show that 5.5V maximum actuating voltage and 5 kHz response frequency are suitable for a miniature, portable, cost-efficient spectrometer.
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Wei Wei, Shanglian Huang, Yong Zhu, Ning Wang, Jie Zhang, Zhu Jin, "Analysis of a Hadamard transform near-infrared spectrometer based on grating light modulator", Proc. SPIE 7159, 2008 International Conference on Optical Instruments and Technology: MEMS/NEMS Technology and Applications, 71590N (2 February 2009); doi: 10.1117/12.807118; https://doi.org/10.1117/12.807118
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