Research on Spectrum Transmission Characteristics of Interference Imaging Multi-Spectropolarimetry

Abstract

This paper analyzed the sampling frequency spectrum transmission characteristics of the interference multi-spectral imaging interferometer imaging process, in view of the spectrum aliasing phenomenon using the following measures to improve: First choosing appropriate optical device parameters to guarantee the maximum optical path difference interval corresponding to any two adjacent pixels of the CCD is not greater than the maximum sampling interval, which can meet the sampling conditions; Secondly, by introducing anti-spectrum aliasing filter-optical low pass filter, which uses the quartz crystal's birefringence properties to split the same target image information into stagger o image and e image; separate distance is determined by the thickness of quartz crystal slice. It can eliminate false low frequency signal. Combining the above two measures, it can eliminate the spectrum aliasing effectively.