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通过获得目标的光谱特性,揭示目标物质的表面成分,从而识别目标。阐述了Hadamard变换多通道探测的原理及基于Hadamard变换的光谱成像仪原理,设计并研制了基于数字微镜器件(DMD)的Hadamard变换多谱段自适应光谱仪;使用该光谱仪在实验中成功的复原出目标物的光谱,从复原出的光谱曲线中可以鉴别出目标物,同时,将实验组所得光谱曲线与国际标准的光谱曲线进行了比较,平均误差小于4%。
By acquiring the spectral properties of the target, the surface composition of the target substance is revealed to identify the target. The principle of Hadamard transform multi-channel detection and the principle of spectral imager based on Hadamard transform are expounded. Hadamard transform multi-spectral adaptive spectrometer based on digital micromirror device (DMD) is designed and developed. By using this spectrometer in the experiment, The target spectrum can be identified from the extracted spectral curve. At the same time, the spectral curve obtained from the experimental group is compared with the international standard spectral curve with the average error less than 4%.