Spectroscopy and Spectral Analysis, Volume. 31, Issue 10, 2874(2011)
A Digital Micromirror Device-Based Hadamard Transform Near Infrared Spectrometer
A Hadamard transform near infrared spectrometer based on a digital micromirror device was constructed. The optical signal was collected by optical fiber, a grating was used for light diffraction, a digital micromirror device (DMD) was applied instead of traditional mechanical Hadamard masks for optical modulation, and an InGaAs near infrared detector was used as the optic sensor. The original spectrum was recovered by fast Hadamard transform algrithms. The advantages of the spectrometer, such as high resolution, signal-noise-ratio, stability, sensitivity and response speed were proved by experiments, which indicated that it is very suitable for oil and food-safety applications.
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LIU Jia, CHEN Fen-fei, LIAO Cheng-sheng, XU Qian, ZENG Li-bo, WU Qiong-shui. A Digital Micromirror Device-Based Hadamard Transform Near Infrared Spectrometer[J]. Spectroscopy and Spectral Analysis, 2011, 31(10): 2874
Received: Nov. 25, 2010
Accepted: --
Published Online: Nov. 9, 2011
The Author Email: Jia LIU (Liujiayp@yahoo.com.cn)