Design of Optical System of Crossed Astigmatism Czerny-Turner Spectrometer

Aiming at the development trend of miniaturization and high resolution of spectrometers, a cross-type Czerny-Turner structure is adopted, and a small spectrometer with simple structure and astigmatism is designed. The principles and correction methods of various aberrations of the cross-type spectrometer are analyzed, the cylindrical mirror is used to correct the astigmatism of the system, and the theoretical equations are derived. The optical design software Zemax is used to optimize the design of the optical system with a wavelength range of 300nm-900nm. The results show that the system has a compact structure and a size that meets the requirements of miniaturization. At the same time, the cylindrical mirror can effectively reduce astigmatism, and the center wavelength resolution can reach 0.5nm, the edge wavelength resolution reaches 1nm.

Automated summary

The study designed a miniaturized spectrometer using a cross-type Czerny-Turner structure, corrected aberrations with a cylindrical mirror, optimized the design through Zemax software, and achieved improved wavelength resolution.