Spectroscopy and Spectral Analysis, Volume. 31, Issue 7, 1975(2011)
Micro Hadamard Transform Near-Infrared Spectrometer
A new type micro Hadamard transform (HT) near-infrared (NIR) spectrometer is proposed in the present paper. It has a MOEMS (Micro-Opto-Electro-Mechanical Systems) blazed grating HT mask. It has merits of compactness, agility of dynamic mask generation and high scan speed. The structure and theory of this spectrometer are analyzed. The 63-order Hadamard-S matrix and mask are designed. The mask is dynamically generated by program of MOEMS blazed gratings. The spectrum is in agreement with that measured by Shimadzu spectrometer in experiments. It has a wavelength range between 900 and 1 700 nm, spectral resolution of 19 nm, single scan time of 2.4 s, SNR of 44.67∶1, optical path of 70 mm×130 mm, and weight under 1 kg. It can meet the requirement of real time detection and portable application.
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ZHANG Zhi-hai, MUO Xiang-xia, GUO Yuan-jun, WANG Wei. Micro Hadamard Transform Near-Infrared Spectrometer[J]. Spectroscopy and Spectral Analysis, 2011, 31(7): 1975
Received: Oct. 19, 2010
Accepted: --
Published Online: Aug. 29, 2011
The Author Email: Zhi-hai ZHANG (zzhincq@163.com)