稳态大视场偏振干涉成像光谱仪中视场补偿型Savart偏光镜透射率研究

论述了基于视场补偿型Savart偏光镜的稳态大视场偏振干涉成像光谱仪的分光机理.依据电磁场边值条件，分析了光在视场补偿型Savart偏光镜中各晶体分界面上的透射情况，得出了透射率的理论计算公式.采用计算机模拟，分析了在半波片为不同材料时，透射率随入射波长、视场角及半波片厚度的变化关系.研究表明，视场补偿型Savart偏光镜具有大视场、高通量、高探测灵敏度的显著特点.此研究可为新型干涉成像光谱技术的研究和新型偏振干涉成像光谱仪的设计、研制提供重要的理论指导.关键词：偏振干涉成像光谱仪视场补偿型Savart偏光镜透射率电磁场边值条件

Analysis of the transmittance of modified Savart polariscope in the static large field of view polarization interference imaging spectrometer

The principle of beam splitting of modified Savart polariscope in the static large field of view polarization interference imaging spectrometer(SLPIIS) is described. The reflection and refraction in every uniaxial of modified Savart polariscope are analyzed， with the incident plane coincident or perpendicular to the principle section of the left plate，based on the electromagnetic boundary conditions. Formulas for the transmittance of the modified Savart polariscope are given as functions of wavelength of the incident light，angle and thickness of the half-wave plate，which are analyzed through computer simulation with different half-wave plates. It is proved that the modified Savart polariscope has the advantages of having both large field of view and high flux，and can be used as high performance lateral shearing beam splitter in SLPIIS. This theoretical study will provide guidance for the experimental study of new polarization interference imaging spectrometer.