Research On Key Aspects Of Moving Mirror Polarization Interference Imaging Spectroscopy

Fourier transform spectrometer is a precision optical instrument integrating optics,mechanics,computers and other disciplines.Its research procedures are complicated and the project is huge.In this paper,in view of the disadvantages of the complex system components,the small field of view,and the lack of portability in the current spectral detection system,a new interferometric imaging scheme with a Soleil compensator as the core moving component is proposed.The principle of this optical system imaging scheme is still based on classical Fourier transform spectroscopy,but at the same time combined with the basic theory of polarized optics,to achieve miniature,lightweight,multi-spectral,large field of view dynamic spectral measurement.The thesis first analyzes and deduces the basic theories involved in the spectral imaging system.The Jones matrix is used to analyze the polarization state of the outgoing light of the system,and the exact parameters that determine the interference intensity value are obtained.Then,according to the design scheme,the overall design index of the system is proposed,and the theoretical analysis and design of the Soleil compensator used in the system design are carried out.The problems of crystal material selection and size parameter index are mainly discussed.At the same time,combined with the optical path of the system,the formula for the optical path difference is derived using the ray tracing method,and the nonlinear problem of the optical path difference caused by the incident light wavelength and the incident aperture is mainly analyzed.Secondly,based on ZEMAX optical design software and Matlab software,the optical path of the designed spectrometer system was simulated.Finally,the spectral restoration method under nonlinear sampling is studied,and this method is simulated.