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28 September 1994 Analytical method to calculate window heating effects on IR seeker performance
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Abstract
In the development of infrared seeker systems, window heating effects that result from missile flight aerodynamics are critical design considerations. For typical launch scenarios, window temperature rises rapidly during the missile's initial launch phase and usually reaches temperatures in excess of 300 degree(s)C by flight termination. This paper formulates an analytical approach for calculating window emittance and radiance on the seeker's focal plane as determined by window temperature profile, spectral transmission band, window physical parameters, and optical seeker design. Radiance levels on the seeker's detector array are calculated for two window materials, sapphire and gallium phosphide, that efficiently transmit in the spectral bands from 3.0 to 4.0 microns and 3.0 to 5.0 microns.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Edward F. Cross "Analytical method to calculate window heating effects on IR seeker performance", Proc. SPIE 2286, Window and Dome Technologies and Materials IV, (28 September 1994); https://doi.org/10.1117/12.187370
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