偏振光谱识别光学系统的复原方法与设计

为准确方便获取4个波长相关的斯托克斯参量，可采用强度调制型偏振光谱成像技术，从偏振光谱强度调制理论与傅里叶变换解调方法入手分析推导计算了偏振光谱信息的复原过程，据此得到了系统的基本结构。以模块化设计的思路分别设计了光谱部分光学系统的前置望远物镜及Offner分光系统，设计结果实现了在400~1 000 nm谱段光谱分辨率1.24 nm，并结合光谱系统参数匹配设计完成了前端偏振光谱调制模块，给出了一套完整的设计实例。最后通过实验验证了偏振光谱调制模块设计的合理性与傅里叶变换解调方法的可行性，为偏振光谱信息复原奠定了基础。

Restoration method and design of polarization spectral recognition optical system

In order to accurately and easily obtain four wavelength-dependent Stokes parameters, the intensity modulated polarization spectral imaging technology was used. The process of the restoration of polarization spectrum was calculated and derived from polarization spectrum intensity modulation theory and Fourier transform demodulation analysis, and the basic structure of the system was obtained. According to the modular design concept, the forward telescope objective lens and Offner spectral dispersion system of the spectrometer optical system were designed, which achieved a spectral resolution of 1.24 nm in the 400-1 000 nm spectral range. And then the front polarization spectrum modulation module was designed based on spectral system parameter, so a complete design example was given. Finally, the reasonability of the polarization spectrum modulation module design and feasibility of the Fourier transform demodulation method were verified by experiments, which lays the foundation for the recovery of polarization spectrum.