Fig. 1. Aero-optical effects of hypervelocity missile

Fig. 2. Infrared window damaged in wind tunnel test

Fig. 3. Thermodynamic characteristics vs temperature curves of sapphire

Fig. 4. Measured tensile and compressive strengths of CVD ZnS

Fig. 5. Failure model of window materials

Fig. 6. Laser thermostructural test results

Fig. 7. Temperature-stress response of the dome

Fig. 8. Measured values and computed values compared stress histories of window model

Fig. 9. Wind tunnel test and flight test of CKEM guidance window

Fig. 10. Spectral transmittivity and emissivity of sapphire window at different temperatures

Fig. 11. Radiation spectrum of CO₂ and H₂O calculated by HITRAN

Fig. 12. Transmittance and radiance characteristics of infrared window material

Fig. 13. Principle of three way test and collected infrared image

Fig. 14. Infrared image at different time during the heat

Fig. 15. Internal cooling window

Fig. 16. Computational and Experimental transmittance, 50% CO₂ gas mixture at 1300 K

Fig. 17. Global absorption spectrum of CO₂gas at different temperatures and concentrations

Fig. 18. Emission spectrum for 3-5 μm and 8-12 μm

Fig. 19. Results of field transmission effects

Fig. 20. Biconical model

Fig. 21. Reconstructed images from wave fronts