Hyperspectral Channel-Modulated Static Birefringent Fourier Transform Imaging Spectropolarimeter with Zoomable Spectral Resolution

A novel channel-modulated static birefringent Fourier transform imaging spectropolarimeter (CSBFTIS) is introduced, which is based on a double Wollaston prism (DWP). With an adjustable air gap (AG), the spectral resolution can be adjusted by changing the AG. The CSBFTIS combines the channel-modulated imaging spectropolarimeter and the slit-free static birefringent Fourier transform imaging spectrometer technology with adjustable spectral resolution. The device is compact and robust, with a wide spectral range and a large luminous flux. Compared with various previous spectropolarimeters, it can greatly reduce the size of the spectral image data to adapt to different application requirements. A prototype is built, and simulation and experiments are carried out, and the results prove the effectiveness of the method.

Automated summary

This study introduces a novel channel-modulated static birefringent Fourier transform imaging spectropolarimeter (CSBFTIS) based on a double Wollaston prism (DWP). The spectral resolution can be adjusted by changing an adjustable air gap (AG) in the CSBFTIS. By combining the channel-modulated imaging spectropolarimeter with the slit-free static birefringent Fourier transform imaging spectrometer technology, the CSBFTIS offers adjustable spectral resolution and can greatly reduce the size of spectral image data compared to previous spectropolarimeters.