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High resolution channeled imaging spectropolarimetry based on liquid crystal variable retarder.

A method for high spectral resolution channeled imaging spectropolarimetry (CISP) using a liquid crystal variable retarder (LCVR) is presented. Controlling the retardation of LCVR, the individual expanded channel, which takes up the whole detector, is obtained in each step. The resolution of recovered spectrum is increased largely, meanwhile the high resolution of image is maintained. The novel CISP system has the advantages of high throughput, compact and stable. It has no moving components and is easy to control as the retardation of LCVR is modulated by computer. The feasibility of that method is proved by the simulation results.