Design of the front optical system for a catadioptric zoom ultraviolet Raman spectrometer

To address the technical challenges in wide-band coverage, large-aperture transmission, and object-distance adaptability in UV Raman spectroscopy, this study proposes a miniaturized ultraviolet Raman front-end optical system with a catadioptric zoom hybrid structure. It covers the 255-285 nm spectral band, 200 mm aperture, and 1.2-3.0 m object distance. Optimized by Zemax for three targets, the system features an optical length of 775 mm in long focus, combining compactness, a large aperture, and high energy concentration. Testing on dimethyl methylphosphate reveals minimal fluorescence interference, distinct low-concentration peaks, and environmental stability, enabling on-site detection of environmental and military toxins.