Optical window systems

Robert H. Au

doi:10.1117/12.22504

1 October 1990 Optical window systems

Robert H. Au

Proceedings Volume 1326, Window and Dome Technologies and Materials II; (1990) https://doi.org/10.1117/12.22504
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Optical window systems protect sensor systems from the aerodynamic and atmospheric environments. The aerodynamic heating on an optical window located about 1 foot downstream from the spherical nose tip is analyzed. The vehicle flies at a constant Mach number and at a constant altitude. The Mach numbers range from 1.5 to 5 and the altitudes from 10 to 30 km. The mechanical responses are calculated for yttria and lanthana-doped yttria, infrared window materials currently being developed for the 3 to 5 im applications. The results show that the yttria window temperature is about 1000 K at Mach 5 and 10 km altitude for an emissivity of 0.04 at 5 μm Steady state and constant altitude flight are assumed.

Citation Download Citation

Robert H. Au "Optical window systems", Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); https://doi.org/10.1117/12.22504

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