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Optical Engineering

High performance long-wave infrared sensor with large zoom optics and high-definition television format
Author(s): Seok-Min Hong; Hyun Sook Kim; Wee Kyung Yu; Chang Woo Kim
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Paper Abstract

A high-performance long-wave IR zoom sensor capable of 20× magnification using a 480×6 linear detector has been developed. The system magnification can be continuously adjusted by simply moving two lens groups, which also provides the means of athermalization of the images. The sensor image can be displayed in the 16 : 9-aspect-ratio high-definition TV format, which allows longer detection and recognition range than normal 4 : 3 TV format images without any loss of field of view. In order to correct the nonuniformity of the detector arrays, the two-point correction method has been applied using a thermoelectric cooler. Additionally, a new histogram processing technique suitable for characterization of the contrast distribution of thermal imagery has been proposed to enhance the image contrast and improve the detection capability.

Paper Details

Date Published: 1 December 2006
PDF: 9 pages
Opt. Eng. 45(12) 123201 doi: 10.1117/1.2403842
Published in: Optical Engineering Volume 45, Issue 12
Show Author Affiliations
Seok-Min Hong, Agency for Defence Development (South Korea)
Hyun Sook Kim, Agency for Defence Development (South Korea)
Wee Kyung Yu, Agency for Defence Development (South Korea)
Chang Woo Kim, Agency for Defence Development (South Korea)

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