Characteristics of dc restoration for thermal imagers

Shi-Chen Chao; Hau-Ming Hwang; An-Jen Shen; Chung-Chiu Wu

doi:10.1117/12.188669

17 October 1994 Characteristics of dc restoration for thermal imagers

Shi-Chen Chao, Hau-Ming Hwang, An-Jen Shen, Chung-Chiu Wu

Proceedings Volume 2269, Infrared Technology XX; (1994) https://doi.org/10.1117/12.188669
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

The problems of dc restoration have bothered the designers of the thermal imager for many years. The distortion phenomena appear differently in different systems. The shape of distortion is dependent on the scan rate, the RC time constant or the width of the target. From the results of analysis, it shows that the MRT curve is quantitatively related to the time constant and scan rate; it also shows that dc drops are serious for low time constant or slow scan rate, and the 1/f noise is apparent in this case. From this analysis, the best conditions can be evaluated for different systems, and this method is helpful in designing a good system.

Citation Download Citation

Shi-Chen Chao, Hau-Ming Hwang, An-Jen Shen, and Chung-Chiu Wu "Characteristics of dc restoration for thermal imagers", Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); https://doi.org/10.1117/12.188669

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