Simulation of Optimal Design of a Cooled Diaphragm of a Thermal Imaging Camera
A. R.
Novoselov
1 *
S. V.
Khryashchev
1
P. A.
Aldokhin
1
P. P.
Dobrovol’skii
1
K. P.
Shatunov
1
1Design and Technology Institute of Applied Microelectronics, Novosibirsk Branch of the Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090
Russia
Correspondence to:
*e-mail: novoselov@isp.nsc.ru
February 21, 2023
Abstract—Irradiation of a cooled matrix photodetector by parasitic radiation in a cryostat for different shapes and designs of a cold diaphragm is numerically simulated. It is found that the optimal shape of a cold diaphragm is a cylinder with two internal optics diaphragms (additional diaphragms). Irradiation of the matrix photodetector by parasitic radiation is about $9{.}82\times 10^{-5}$ W $\cdot$ cm${}^{-2}$ with an uneven distribution over the area of about 3$\%$.
Keywords:
photodetectorscryostatcooled diaphragminfrared radiation
DOI: 10.3103/S8756699023040076