Fig. 1. Infrared component model. (a) Infrared optical system; (b) infrared Dewar component

Fig. 2. PST simulation results. (a) 0°≤θ≤90.00°; (b) 0°≤θ≤3.55°; (c) 3.55°<θ≤66.00°; (d) 66.00°<θ≤90.00°

Fig. 3. Radiation stray lights at key surfaces. (a) 8.0‒10.5 μm; (b) 10.3‒11.3 μm; (c) 11.5‒12.5 μm; (d) total NSR

Fig. 4. Radiation stray lights at key surfaces. (a) 8.0‒10.5 μm wave band; (b) 10.3‒11.3 μm wave band; (c) 11.5‒12.5 μm wave band; (d) total NSR

Fig. 5. Diagram of Dewar network

Fig. 6. Power consumption of chiller under different loads

Fig. 7. Dewar internal optical element spacing

Fig. 8. Schematic of cold screen design

Fig. 9. PST simulation results after adding baffle. (a) 0°≤θ≤90.00°; (b) 0°≤θ≤3.55°; (c) 3.55°<θ≤66.00°; (d) 66.00°<θ≤90.00°

Fig. 10. NSRs of Dewar key surfaces. (a) Window; (b) window cap

Fig. 11. Measured curve of germanium transmittance in window

Fig. 12. Spurious analysis under different window margins. (a) NSR for lens cone at 8.0‒10.5 μm; (b) NSR for lens cone at 10.3‒11.3 μm; (c) NSR for lens cone at 11.5‒12.5 μm;(d) VGI of optical system

Fig. 13. Dewar refrigeration assembly of infrared detector