USA As Represented by Secretary of the Navy

US Government As Represented by the Secretary of the Army

John K Delaney

William Paul Blase

Jason G Zeibel

An apparatus detects a transient thermal gradient in a substrate. The apparatus is comprised of an electromagnetic radiation source configured to emit source electromagnetic radiation; a fast shutter configured to block the source electromagnetic radiation when closed, and open in response to a command to pulse the source electromagnetic radiation; a substrate support that supports a substrate disposed to emit a pulsed radiation from a back side of the substrate when the source electromagnetic radiation is pulsed through the substrate; and a detector configured to face the back side of the substrate. The detector is used to detect a transient thermal gradient in the pulsed radiation.

Apparatus for detecting a transient thermal gradient in a substrate

A cold-tunnel system is disclosed for recovery of thermal emissivity of extended targets. The cold-tunnel system is comprised of an infrared camera having a thermal imaging lens; an aperture plate having a hole aligned with the thermal imaging lens; four cold-wall panels assembled in a box pattern as a cold-tunnel assembly to form a cold tunnel; an air-blowing desiccator affixed to each cold-wall panel; an external liquid chiller to chill a reservoir of working fluid; a target under test; and an extended source blackbody reference disposed directly behind the target under test.

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Bethesda, MD, United States of America

John K Delaney