Fig. 1. Block diagram of temperature control system

Fig. 2. Schematic diagram of PID control

Fig. 3. Relationship between detector temperature and code values

Fig. 4. Flow chart of temperature control system software

Fig. 5. Temperature cooling curve of the detector

Fig. 6. Temperature rising curve of the detector

Fig. 7. Scatter plot of temperature at a target temperature of −5 °C

Fig. 8. Scatter plot of temperature at a target temperature of −10 °C

Fig. 9. Temperature curves of different tungsten lamps

Fig. 10. SNR curves at different temperatures

Fig. 11. Dark noise curves at different temperatures