| 光谱学与光谱分析 |
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| A Digital Micromirror Device-Based Hadamard Transform Near Infrared Spectrometer |
| LIU Jia, CHEN Fen-fei, LIAO Cheng-sheng, XU Qian, ZENG Li-bo, WU Qiong-shui* |
| School of Electronic Information, Wuhan University, Wuhan 430079, China |
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Abstract 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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Received: 2010-11-25
Accepted: 2011-03-16
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Corresponding Authors:
WU Qiong-shui
E-mail: qswu@whu.edu.cn
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