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Research on the Technique of Spectro-polarimetric Imaging of Celestial Bodies and Its Experiments in the Daytime

SUN Xiao-bing HONG Jin LUO Dong-gen YANG Wei-feng ZHANG Dong-ying QIAO Yan-li (Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China)  
It is very difficult to observe the celestial bodies in the daytime.The methods of spectro-polarimetric imaging and the skylight polarization measurements in real-time are adopted to largely reduce influence of atmospheric scattering.The SNR and contrast of celestial bodies detection in the skylight background are enhanced.The principle of spectro-polarimetric imaging for the celestial bodies detection in the severely atmospheric scattering was discussed.The related experimental system was introduced.The experimental measurements of spectro-polarimetric imaging for the stars were performed.The 6.33m star can be measured using spectro-polarimetric imaging in the daytime.This result of experiments was compared with that of spectral imaging.The results indicate that the contrast of celestial bodies detection using spectro-polarimetric imaging is enhanced obviously.Hence,it shows that the technique of spectro-polarimetric imaging can be applied to the research of celestial bodies observation in the daytime.
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