Sparse-Aperture Passively-Cooled Window

Propose new window concept that separates optical features from material response issues. The optical part of the window configuration is managed by sparse aperture imaging, wherein small optical ports are strategically placed in a nominal opaque window area to collect the light signatures, combine the signals, and obtain a well-focused image on a seeker detector plane. The primary window area controls its temperature through the passive application of metallic hydrides that maintain a low temperature once heated by the hypersonic flow. The optical ports are small in diameter so thermal management is achieved by using materials the are less prone to heating and by cooling the structure supporting the optical ports. Approved for Public Release | 19-MDA-10270 (18 Nov 19)