Parallel-Scan Thermal Imager With A Thermoelectrically Cooled Multielement Detector

Masaaki Nakamura; Yukihiro Yoshida; Hiroyuki Ishizaki; Kenji Murase

doi:10.1117/12.976111

20 November 1985 Parallel-Scan Thermal Imager With A Thermoelectrically Cooled Multielement Detector

Masaaki Nakamura, Yukihiro Yoshida, Hiroyuki Ishizaki, Kenji Murase

Proceedings Volume 0540, Southwest Conf on Optics '85; (1985) https://doi.org/10.1117/12.976111
Event: 1985 Albuquerque Conferences on Optics, 1985, Albuquerque, United States

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.

Citation Download Citation

Masaaki Nakamura, Yukihiro Yoshida, Hiroyuki Ishizaki, and Kenji Murase "Parallel-Scan Thermal Imager With A Thermoelectrically Cooled Multielement Detector", Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); https://doi.org/10.1117/12.976111

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