Fig. 1. Schematic of Czerny-Turner spectrometer structure

Fig. 2. Effects of initial incident angle at 500 nm on diffraction angle and off-axis angles of focusing mirror and collimating mirror.(a) diffraction angle at an edge wavelength of 200 nm; (b) diffraction angle at an edge wavelength of 1000 nm; (c) off-axis angle of collimating mirror; (d) off-axis angle of focusing mirror

Fig. 3. YRMS values for different initial incident angles. (a) Initial incident angle at a central wavelength of 500 nm; (b) initial incident angle at an edge wavelength of 1000 nm

Fig. 4. Initial structure diagram before optimization

Fig. 5. Optimized light path diagram