Fig. 1. Cold shield component

Fig. 2. Computational model of HOT cold shield component

Fig. 3. Triangle and emission point

Fig. 4. Noise signal generated by thermal radiation of cold shield and optical filter at 150 K

Fig. 5. Noise signal generated by thermal radiation of cold shield and optical filter at different temperatures

Fig. 6. Noise signal generated by thermal radiation of cold shield at 200 K (total reduction of emissivity)

Fig. 7. Noise signal generated by all kinds of strary radiation at 200 K (total reduction of emissivity)

Fig. 8. Cold shield of part reduction of emissivity

Fig. 9. The contrast of noise signal generated by thermal radiation of cold shield

Fig. 10. The contrast of noise signal generated by outside strary radiation

Fig. 11. Noise signal generated by all kinds of strary radiation at 200 K (part reduction of emissivity)

Fig. 12. Noise signal generated by total strary radiation at 180 K (part reduction of emissivity)

Fig. 13. Noise signal generated by total radiation at 200, 203, 206, 209 K (part reduction of emissivity)

Fig. 14. Noise signal generated by total radiation at 220 K (part reduction of emissivity)