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Proceedings Paper

Wide-area-coverage infrared surveillance system
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Paper Abstract

Current infrared imaging systems used for surveillance and search and rescue operations possess two fields of view which may be alternately selected by the operator: a wide field of the order of 20 degrees is used for the search and detection of targets, and a narrower field of a few degrees is selected for the recognition tasks. However, the degraded sensitivity and resolution of the wider field prevents it from fulfilling its function adequately. A new concept based on the focal plane array detector technology is intended to correct this drawback and to improve future infrared surveillance system for search and rescue operations. Simulating the properties of the human eye, the concept allows the simultaneous surveillance and image acquisition in two fields of view. A wide peripheral field of view (60 degrees) with increased sensitivity but lower resolution is dedicated to search and detection. A narrower field (6 degrees), which can be steered within the wider field, allows the recognition of detected objects with an improved resolution obtained by the use of microscanning techniques. THe high resolution required for the simultaneous display of both fields of view has led to the development of a new type of display, based on optical projection and superposition, better adapted to the human eye and hence optimizing the human interface. The constraints on the opto-mechanical and electronic design imposed by the mobility of the narrower field within the larger one, the microscanning mechanism and the calibration requirements of the focal plane array are discussed, and the selected solutions are presented. The limitations of the system in its present state of development are exposed and the plans for future improvements are elaborated.

Paper Details

Date Published: 10 June 1996
PDF: 10 pages
Proc. SPIE 2743, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VII, (10 June 1996); doi: 10.1117/12.241960
Show Author Affiliations
Paul C. Chevrette, Defence Research Establishment Valcartier (Canada)
Jean Fortin, ProConcept Enr. (Canada)

Published in SPIE Proceedings Vol. 2743:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VII
Gerald C. Holst, Editor(s)

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