Analysis of a Hadamard transform near-infrared spectrometer based on grating light modulator

Wei Wei; Shanglian Huang; Yong Zhu; Ning Wang; Jie Zhang; Zhu Jin

doi:10.1117/12.807118

2 February 2009 Analysis of a Hadamard transform near-infrared spectrometer based on grating light modulator

Wei Wei, Shanglian Huang, Yong Zhu, Ning Wang, Jie Zhang, Zhu Jin

Proceedings Volume 7159, 2008 International Conference on Optical Instruments and Technology: MEMS/NEMS Technology and Applications; 71590N (2009) https://doi.org/10.1117/12.807118
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

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.

Citation Download Citation

Wei Wei, Shanglian Huang, Yong Zhu, Ning Wang, Jie Zhang, and 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); https://doi.org/10.1117/12.807118

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KEYWORDS

Modulators

Spectroscopy

Signal to noise ratio

Mirrors

Sensors

Actuators

Computer programming

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