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基于双直角分束器设计了一种反射式静态傅里叶变换光谱仪光学系统,并搭建了样机。该光谱仪光学系统的分光装置采用双直角分束器,其他光路全部采用反射式结构,有效折叠光路,与透射式静态傅里叶光谱仪相比,系统体积减小一半以上。用汞灯作为静态傅里叶光谱仪光源时,得到了404.7,435.8,546.1,577.0nm的峰值谱线,实验结果很好地复原了汞灯实际光谱;用波长为650nm的激光进行实验,光谱分辨率约为5.93nm,与理论计算结果基本相符。该光学系统具有结构紧凑、体积小、重量轻、抗震性强等诸多优点,可为小型化、便携式静态傅里叶光谱仪器的研制提供技术支持。
A reflection-type static Fourier transform spectrometer optical system is designed based on the double right-angle beam splitter, and a prototype is built. The spectrometer optical system uses a double right-angle beam splitter beam splitter, all the other optical path using reflective structure, the effective folding optical path, compared with the transmission static Fourier spectrometer, the system reduced by more than half the volume. When the mercury lamp was used as the light source of static Fourier spectrometer, the peak spectra of 404.7, 435.8, 546.1 and 577.0 nm were obtained. The experimental results could well reconstruct the actual spectrum of mercury lamp. Experiment with the laser with wavelength of 650 nm, The rate is about 5.93nm, basically in line with the theoretical calculation. The optical system has the advantages of compact structure, small size, light weight, strong shock resistance and the like, and can provide technical support for the development of miniaturized and portable static Fourier spectrometer.