Snapshot White Light Sagnac Interferometer And Its Application

Acquisition of the polarization parameters and polarimetric imaging is of great interest in many areas such as remote sensing, target recognition, astro observationn,geology exploration, atmospheric Observation, machine vision, precision machining,biomedicine et al. It is most necessity and urgently of the research of this technique,namely the imaging polarimetry and imaging polarimeter.The theoretical and experimental demonstration of a dispersion compensatedpolarization snapshot imaging polarimeter is presented. Based on standard polarizationSagnac interferometer polarimeter (PSI), two diffraction gratings are introduced to it,createng the dispersion compensated polarization snapshot imaging polarimeter. Thedevice enable the generation of an achromatic fringe field in white light, yieldingsignificantly more radiative throughput than the original quasi-monochromatic SPpolarimeter. The main content of this paper includes the mathematical model for thepolarimeter, polarization modulation principle, demodulation principle and its methods,way to calibrate and reconstruct data from the instrument, construction method of theapparatus, experimental design, analysis of experimental results, direction ofapplication, et al. We list all the configuration and experimental setup for laboratorytesting, demodulation principle and mathematical model. Some representative scenetesting of this equipment is also performed, demonstrating the ability to detect eitherthe Stokes parameters in white light.After the research,It has been shown that The DCPSI have the ability to detecteither the S2and S3, or the S1and S2Stokes parameters in white-light.The carrierfrequency’s visibility decreases when the coherence length of the incident illuminationis changed. Wich means that,this equipment not sensitive to the wavelength of theincident light.