STITCHING TYPE LARGE APERTURE DEPOLARIZER FOR GAS MONITORING IMAGING SPECTROMETER
To increase the accuracy of radiation measurement for gas monitoring imaging spectrometer,it is necessary to achieve high levels of depolarization of the incoming beam.The preferred method in space instrument is to introduce the depolarizer into the optical system.It is a combination device of irefringence crystal wedges.Limited to the actual diameter of the crystal,the traditional depolarizer cannot be used in the large aperture imaging spectrometer(greater than 100mm).In this paper,a stitching type depolarizer is presented.The design theory and numerical calculation model for dual babinet depolarizer were built.As required radiometric accuracies of the imaging spectrometer with 250mm×46mm aperture,a stitching type dual babinet depolarizer was design in detail.Based on designing the optimum structural parmeters,the tolerance of wedge angle,refractive index,and central thickness were given.The analysis results show that the maximum residual polarization degree of output light from depolarizer is less than 2%.The design requirements of polarization sensitivity is satisfied.
Polarization Depolarizer Muller matrix Imaging Spectrometer Stitching Numerical Analysis
Xiaolin Liu Ming Li Ning An Tingcheng Zhang Guili Cao Shaoyuan Cheng
Beijing Institute of Space Mechanics & Electricity,Beijing Key Laboratory of Advanced Optical Remote Sensing Technology,China
国际会议
北京
英文
1141-1144
2018-05-07（万方平台首次上网日期，不代表论文的发表时间）