Fig. 1. Concept diagram of Rowland circle spectrometer

Fig. 2. Optical structure simulation diagram of Rowland circle with measuring range of 200 nm～450 nm and wavelength spot diagram of 253.6 nm at different slit widths

Fig. 3. Spot diagram of full-band feature lines and edge lines of Rowland circle spectrometer with measuring range of 200 nm~450 nm

Fig. 4. Installation position diagram of CCD

Fig. 5. Structure diagram of optical chamber assembly of Rowland circle spectrometer

Fig. 6. Variation curves of maximum and minimum temperatures of base with time without heating system

Fig. 7. Influence of different wind speeds on temperature field distribution of spectrometer without heating system

Fig. 8. Thermal deformation diagram in horizontal direction at inlet wind speed of 0.8 m/s without heating system

Fig. 9. Spot diagram of spectral line range of 200 nm~313.7 nm at inlet wind speed of 0.8 m/s without heating system

Fig. 10. Temperature field distribution diagram of spectrometer with different heating systems

Fig. 11. Thermal deformation diagram in horizontal direction at inlet wind speed of 0.8 m/s with top-layer heating system

Fig. 12. Spot diagram of spectral line range of 200 nm~313.7 nm at inlet wind speed of 0.8 m/s with top-layer heating system