MODELING OF THE OPTIMAL DESIGN OF THE COOLED THERMAL DIAPHRAGM OF THERMAL IMAGING DEVICES
A.R. Novoselov, S.V. Khryashchev, P.A. Aldochin, P.P. Dobrovolsky, K.P. Shatunov
Novosibirsk Branch of the Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, “Technology and Design Institute of Applied Microelectronics” (Branch ISP SB RAS “TDIAM”), Novosibirsk, Russia
Keywords: photodetectors, cryostat, cooled diaphragm, infrared radiation
Abstract
The results of numerical simulation of the irradiation by parasitic radiation of a cooled matrix photodetector in a cryostat with different shapes and designs of the cold diaphragm are presented. The optimal shape of the cold diaphragm is found to be a cylinder with two internal blends (additional diaphragms). The level of irradiation of the matrix photodetector with parasitic radiation is about 9.82×10-05 W/cm2 with an uneven distribution over the area of about 3%.
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