Xue Qingsheng, Song Junhong, Lu Fengqin, Ma Jun, Cao Diansheng
Appl Opt. 2024 Apr 20;63(12):3029-3038. doi: 10.1364/AO.521955.
In order to meet the needs of the femi-ultra-high spectral resolution test, an optical system of the femi-ultra-high spectral resolution spectrometer in the spectral range of 190-800 nm is designed based on the quaternary dispersion of the middle echelon grating under the condition that the volume and weight of the spectrometer do not increase sharply. After the optimization design, the spectral resolution can reach 51.149 fm in the full field of view of 0.5 mm; at the wavelength of 191 nm, the spectral resolution in the whole spectral range is better than 150 fm, and the maximum distortion of the system is 0.2288%, which can provide a feasible reference for the subsequent design of the spectrometer optical system to realize the simultaneous detection of a wide band and high spectral resolution.
为满足飞秒超高光谱分辨率测试需求，在光谱仪体积和重量不急剧增加的条件下，基于中阶梯光栅的四级色散，设计了190 - 800 nm光谱范围内的飞秒超高光谱分辨率光谱仪光学系统。经优化设计，在0.5 mm全视场下光谱分辨率可达51.149 fm；在191 nm波长处，全光谱范围内光谱分辨率优于150 fm，系统最大畸变0.2288%，可为后续光谱仪光学系统设计实现宽带与高光谱分辨率同时探测提供可行参考。
