摘要
哈达玛变换光谱成像仪是一种采用多通道探测的数字变换光谱技术,介绍了基于数字微镜阵列器件(DMD)的哈达玛变换光谱仪工作原理与仪器结构,对成像传感器所获得的混合像元进行了分析研究,理论推导出了混叠像元的解混合方法,仿真实验结果表明该方法简单有效,对提高混合像元复原光谱精度超过10%。
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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第10期2870-2878,共9页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(41005109)资助
关键词
哈达玛
混合像元
光谱成像仪
DMD
Near infrared spectrometer
Hadamard transform
Digital micromirror device
