Fig. 1. The first edition practical picture of coil tin hanging and vacuum gold-plating of infrared integrating sphere radiation source

Fig. 2. Design drawing of overall control scheme

Fig. 3. Structure design of infrared integrating sphere emitter with wide dynamic range

Fig. 4. Relationship between reflectivity and multiple reflectance factor of gold-plating

Fig. 5. Physical picture and spectrum output of carbon fiber quartz electrothermal tube

Fig. 6. Design of development process

Fig. 7. Effect of coil welding and integrating sphere vacuum gold-plating

Fig. 8. High precision calibration of infrared integrating sphere emitter and application workflow picture

Fig. 9. Imaging effect of single off-axis ellipsoid mirror reflective light path (Φ30 mm)

Fig. 10. Measurement result of surface uniformity and angular nonuniformity of the 2nd infrared cascade integrating sphere

Fig. 11. Measurement result of instability of the 2nd infrared cascade integrating sphere

Fig. 12. Spectral radiance calibration results of infrared integrating sphere emitters at room temperature, atmospheric pressure, low temperature and vacuum environment

Fig. 13. Measurement of SNR of 300 K standard cavity blackbody by Fourier spectrometer