System for detecting structural defects utilizing blackbody self-radiation

A system is disclosed which utilizes the substantially steady-state temperature of a coated object (10), in conjunction with an optical detection system, to selectively view defects (24,26,28,32,34,36) and features (22) of the object below the coating (14) without the necessity of transient heating...

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Bibliographische Detailangaben
Hauptverfasser:	CHU, STEVEN, SILBERSTEIN, ROBERT P, WEIR, JOHN DOUGLAS, DIMARZIO, DONALD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	COLORIMETRY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	A system is disclosed which utilizes the substantially steady-state temperature of a coated object (10), in conjunction with an optical detection system, to selectively view defects (24,26,28,32,34,36) and features (22) of the object below the coating (14) without the necessity of transient heating or IR illumination and reflectance imaging. The optical detector (16), such as an IR camera, may be tailored for the wavelengths at which the coating material is substantially transparent, thereby maximizing the viewing clarity of the defects and features under the coating, and distinguishing them from any spurious features on the top surface of the coating. The present system enables the inspection of small or large areas in real time, without requiring complex image acquisition, storage and image processing equipment and software.