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Optical Engineering

A Passive Thermal Screen for Infrared Scene Simulation
Author(s): W. H. Purdy; Walter E. Woehl
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Paper Abstract

The objective of the investigation described here was to determine the feasibility of an infrared (8-14 pm) scene simulation concept; the concept is called a PTS (Passive Thermal Screen). It is passive because it does not contain any heat generating elements, but receives its energy from a visible image that is cast upon its working surface by a slide (or motion picture) projector, instead. Measurement data presented show that thermal contrasts of up to 16 C can be produced using bar pattern images and an input irradiance of 0.09 W/cm2. Contrast and temporal response measurements were made using a Thermo-vision infrared imaging camera (and display) in combination with a magnetic-disc recorder. The most severe problem area that remains before the concept can be put to practical use as part of a full-scale IR simulator is that of producing input slides that can accommodate the high radiance levels required of the projector.

Paper Details

Date Published: 1 December 1976
PDF: 5 pages
Opt. Eng. 15(6) 156554 doi: 10.1117/12.7972042
Published in: Optical Engineering Volume 15, Issue 6
Show Author Affiliations
W. H. Purdy, The University of Texas at Austin (United States)
Walter E. Woehl, Armament Development and Test Center (United States)

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