叙述了阿达玛变换光谱成像仪的原理及仪器构成,对阿达玛编码模板引起的光谱混叠现象进行了分析研究.从理论上导出了光谱混叠公式,并提出了光谱修正方法,仿真实验结果表明该方法简单有效.修正后光谱图像的分辨率取决于偏离光轴最远处的码元对应的空间分量.

The principle and instrument structure of Hadamard transform spectral imager is described, and spectra aliasing caused by Hadamard encoding mask is investigated. Spectra aliasing formula is obtained in theory and the method of spectra revision is proposed.Simulation results show that this method is simple and effective. The resolution of spectral images revised depends on space component corresponding to the code which is deviated from optic axis most.