THERMAL IMAGER

A thermal imager including a cryogenically cooled detector element array and a scanning element has an optical system with a field of view limited by a field stop (2). A retroreflective region (6) is provided on part of the field stop to act as a temperature reference by allowing the detector array...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	BRIAN FREDERICK SMITH
Format:	Patent
Sprache:	eng
Schlagworte:	COLORIMETRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	A thermal imager including a cryogenically cooled detector element array and a scanning element has an optical system with a field of view limited by a field stop (2). A retroreflective region (6) is provided on part of the field stop to act as a temperature reference by allowing the detector array to "look at" itself. A second, different temperature reference (5) is provided on another part of the field stop and the two references are used to equalise and adjust the output characteristics of the elements in the detector array.