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Proceedings Paper

Parallel-Scan Thermal Imager With A Thermoelectrically Cooled Multielement Detector
Author(s): Masaaki Nakamura; Yukihiro Yoshida; Hiroyuki Ishizaki; Kenji Murase
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Paper Abstract

This paper describes the design and performance of a low-cost parallel-scan thermal imager. The sensor, with a 16-element photoconductive HgCdTe detector, employs a thermoelectric cooler that has the advantages of low life cycle costs, relatively light weight, and high reliability. The scanner is a rotating polygonal mirror with different degrees of tilt on the facet faces, which allows buildup of the square format in object space. This type of scanner has a simple structure and is suited for high-speed operation. In order to lower production costs, an aluminum polygonal mirror, manufactured by precision single-point diamond turning, has been developed. The system has the following parameters, determined by making a trade-off study among performance, size, and cost: field of view, 14.7° x 14.7°; angular resolution, 2 mrad; aperture of focal optics, 23 mm; frame rate, 20 Hz; resolution, 128 x 128 lines; and NETD, 0.6°C.

Paper Details

Date Published: 20 November 1985
PDF: 9 pages
Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); doi: 10.1117/12.976111
Show Author Affiliations
Masaaki Nakamura, Fujitsu Laboratories Ltd. (Japan)
Yukihiro Yoshida, Fujitsu Laboratories Ltd. (Japan)
Hiroyuki Ishizaki, Fujitsu Laboratories Ltd. (Japan)
Kenji Murase, Fujitsu Ltd. (Japan)

Published in SPIE Proceedings Vol. 0540:
Southwest Conf on Optics '85
Susanne C. Stotlar, Editor(s)

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