Study of heat-flow equation for uncooled infrared focal plane arrays

Xiaoqing Du; Lei Liu; Benkang Chang

doi:10.1117/12.451891

5 December 2002 Study of heat-flow equation for uncooled infrared focal plane arrays

Xiaoqing Du, Lei Liu, Benkang Chang

Proceedings Volume 4795, Materials for Infrared Detectors II; (2002) https://doi.org/10.1117/12.451891
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Since influences of each factor on temperature increase can be reflected by heat flow equation, study of it is helpful to optimal design for uncooled infrared focal plane arrays (UIFPA). But presently there is no more particular discussion of heat flow equation and no frank graphs as reference. In this paper particular discussions of influencing factors are given and for the first time 2-D and 3-D graphs are used to frankly show the degree of influences from different angle of view. Schemes on the optimal design of UIFPA are also given. According to graphs the maximum of temperature increase is obtained only when UIFPA is modulated at certain value which is less than cut-off modulation frequency. In 3-D graphs distinct curves are obtained in different range of thermal conductance and heat capacity and the optimal temperature increase value is achieved only when thermal conductance and heat capacity make thermal response time meet optimal condition. Optimal condition and formula can be deduced with given graphs and multifold approaches of optimal design of thermal isolation structure are discussed. It is proved that in optimal condition temperature increase can achieved 10^-1 level. It is clear that data provided by 2-D and 3-D graphs is valuable to evaluate optimal range for UIFPA.

Citation Download Citation

Xiaoqing Du, Lei Liu, and Benkang Chang "Study of heat-flow equation for uncooled infrared focal plane arrays", Proc. SPIE 4795, Materials for Infrared Detectors II, (5 December 2002); https://doi.org/10.1117/12.451891

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KEYWORDS

Infrared radiation

Thermography

Infrared imaging

Modulation

Staring arrays

Thermal modeling

Sensors

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