The Research on Real-time Spectrum recovery Technology of DMD-based Hadamard Transform Spectral Imager

摘要

The performance of Hadamard Transform spectral imager depends on spatial light modulator. This paper introduced theory and instrument composition of spectral imager with DMD as spatial light modulator and a design of real-time spectrum recovery circuit of the spectral imager based on Xilinx Spartan-3A DSP 1800A, which used FPGA with digital signal processing functions to achieve system controlling and inverse Hadamard transform. The results show that the circuit could get clear recovery images and meet the requirements of the spectral imager for real-time processing. It can be used for target identification based on spectral characteristics, etc.