Differential radiation detection apparatus

Details Differential radiation detection apparatus Differential radiation detection apparatus

G - Physics

01

J

73/112, 73/52

G01J 5/02 (2006.01) G01F 23/22 (2006.01) G01J 5/62 (2006.01) G01J 5/08 (2006.01)

Patent

CA 1165590

8 PHB 32725 ABSTRACT: The indication of temperature discontinuities in a scene may, when taken with other known facts about the scene, indicate the boundaries of objects, for example the level of the contents of a storage silo. The scene is imaged in thermal radiation upon a pair of adjacent pyro- electric radiation detectors. The scene radiation is chopped and the difference in detector outputs displayed to the observer while the field of view of the detectors, aligned with a visual aiming sight, is traversed across the object. The location and sign of a temperature dis- continuity in the visual scene may for example enable the observer to measure the silo contents.

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