Czerny-Turner型光栅光谱仪光学系统优化设计

In order to improve the resolution of grating spectrometer, a Czerny - Turner spectrometer's optical systems whose working spectral range is 500~800nm, focal length is 800mm and objective lens' type is spherical surface is designed. The calculating method of various optical elements and system structure parameters under the aberration-free condition of the optical system is given. The ray tracing and optimization design of the system are done by using the optical design software Zemax, and a spectrometer is developed. The theoretical and experimental results show that the theoretical resolution of the system in 500 ~ 800 nm spectral range is within 0.01nm, and the practical resolution is within 0.04nm, which reach the request of spectral measurement. The whole optical system has a simple structure, less number of components, low cost, high resolution, and good stability, etc.