Research On Optical System Analysis And Design Of Infrared Bispectrum Fourier Transform Imaging Spectrometer

Imaging spectral detection technology is a new generation optical detection technology,which is based on spectral analysis theory and integrated image and spectral detection.As a very important detection means,the imaging spectrum detection technology is widely used in space monitoring,environmental protection and other military and civilian fields.With the increasingly serious situation of safety production,environmental pollution and frequent occurrence of disaster accidents,it is urgent for the wide spectrum section of long Wavelength Infrared imaging spectrometer which can quickly detect,have strong environmental applicability,high stability,good reliability and light miniaturization.In order to satisfy the application requirements of strong environment applicability,high stability and wide spectral segment measurement,this paper presents a temporal-spatial combined modulation Fourier transform Imaging spectrometer based on static interference system,which is designed for front telescope optical system and rear imaging system respectively.The main work of this paper includes the following three aspects In this paper.Firstly,in this paper,a dual-spectrum integrated static Fourier transform imaging spectrometer with stepped micro-mirrors as the core of the interferometric system is studied,and the modeling and simulation of the system is completed.According to the technical indexes of the system,the technical parameters of the optical system and the structural parameters of the stepped micro-mirrors are calculated.Secondly,According to the aberration theory,the initial structure of the reflective Front telescope system is calculated by adding the constraint,and the large number of Het of the tilted beam splitter and the compensation plate are corrected by the optical design software optimization.The design of transmission post imaging system is completed,and the front telescope system and the rear imaging system are optimized to achieve good imaging quality.Finally,the view field angle is 1.5°,the F Number of medium wave channel is 4,and the F number of Long-wave channel is 2.In the range of Bispectrum,the Point-column graph RMS of the optical system is smaller than the 7.9?m,MTF value in the detector's characteristic frequency 17lp/mm,and has good imaging effect.Thirdly,the analysis of stray light and tolerance in optical system of Imaging spectrometer is completed,and the whole system which is easy to process and effectively restrain stray light is obtained,so as to provide reference for the processing and adjusting of the later instrument.