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Proceedings Paper

Design considerations of IRST system
Author(s): Ronda Venkateswarlu; Meng Hwa Er; Siu Chung Tam; Choong Wah Chan; Lay Cheng Choo
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Paper Abstract

Infrared search and track (IRST) system is a wide field of view surveillance system, meant for autonomous search, detection, acquisition, and cue of potential targets. The first and second generation IRSTs utilized detectors with multiple elements followed by discrete preamplifiers for signal read-out. They have many performance limitations. With the advent of infrared focal plane array (IRFPA) sensors, the present trend is to build IRSTs based on line FPA sensors to achieve higher sensitivity and resolution. However, due to system limitations of line IRFPA sensors, scanning mode of IRST cannot be stopped at any desired position to scan a small sector of interest. They also suffer from more false alarms in target detection. In future, it may be desirable to reduce false alarms, and also to use an IRST system for closed-loop- tracking of a potential target, in addition to its surveillance mode. IRST based on area array sensors may be a better option for this purpose, but it may pose some problems when used in a surveillance mode. This paper addresses this issue. Design considerations of all sub-systems of an IRST based on line/area array sensors, such as scanner assembly, interface electronics with the sensor, nonuniformity correction, signal processor, and the display methodology to cover 360 degrees are also discussed.

Paper Details

Date Published: 13 August 1997
PDF: 12 pages
Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); doi: 10.1117/12.280379
Show Author Affiliations
Ronda Venkateswarlu, Nanyang Technological Univ. (Singapore)
Meng Hwa Er, Nanyang Technological Univ. (Singapore)
Siu Chung Tam, Nanyang Technological Univ. (Singapore)
Choong Wah Chan, Nanyang Technological Univ. (Singapore)
Lay Cheng Choo, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 3061:
Infrared Technology and Applications XXIII
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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