Innovative Optical Method For Resolving A Re-Entry Vehicle From Its Associated Wake

Poh Shien Young; Virginia J. Woods

doi:10.1117/12.948016

27 January 1989 Innovative Optical Method For Resolving A Re-Entry Vehicle From Its Associated Wake

Poh Shien Young, Virginia J. Woods

Proceedings Volume 0965, Current Developments in Optical Engineering III; (1989) https://doi.org/10.1117/12.948016
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

To resolve a re-entry vehicle (RV) from its associated wake, their emittances due to different temperatures are used as the basic foundation for development of an innovative optical method. This method consists of using a selective sensor and a cross-grating. The former selects a particular waveband to differentiate the radiation of the tip of the RV from that of the wake while the latter determines the angular location of the tip radiation. The temperatures of the tip and the wake are assumed to be 2500°K and 2000°K respectively. The sensor is made of CsTe/MgF2, sensitive only to the ultraviolet band of ~ O.l3μm to 0.3μm which is the waveband covered by the spectral emittance curve of the tip at temperature 2500°K and above the level of emittance of 5.76 x 10-7 watt/(m2-μm). All other wavebands are excluded by the sensor. The angular location of the selected radiation in terms of azimuth and elevation is determined by a cross-grating of perpendicular slits. The number of slits was selected to be 20,000 in 4 cm. The details of the theoretical and engineering points will be presented in this paper along with the pertinent questions.

Citation Download Citation

Poh Shien Young and Virginia J. Woods "Innovative Optical Method For Resolving A Re-Entry Vehicle From Its Associated Wake", Proc. SPIE 0965, Current Developments in Optical Engineering III, (27 January 1989); https://doi.org/10.1117/12.948016

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KEYWORDS

Sensors

Diffraction gratings

Nose

Optical engineering

Diffraction

Black bodies

Missiles

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