TY - JOUR
T1 - Infrared scene projection optical system for blackbody micro cavity array
AU - Zhao, Tianze
AU - Shi, Rui
AU - Li, Zhuo
AU - Gao, Yanze
AU - Zhang, Sichen
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1
Y1 - 2023/1
N2 - The ground experiment of a spaceborne infrared detection system requires to generate infrared images that simulate infrared characteristics of space targets under laboratory conditions. The infrared images are physically generated by an infrared scene generator and projected to the detection system by an infrared scene projection optical system (IRSPOS). In this paper, a middle-wave IRSPOS (MW-IRSPOS) and a long-wave IRSPOS (LW-IRSPOS) are designed to operate in the cryogenic environment. The IRSPOSs have an operating temperature range of 100–350 K and operating wavebands of 3–5 μm and 8–10 μm, respectively. The thermal deformation of the IRSPOS structures is analyzed, and the IRSPOS structures are optimized to ensure the temperature adaptability. The LW-IRSPOS prototype is fabricated according to the analysis results, and the infrared scene projection experiment is carried out. Experimental results show that the modulation transfer function (MTF) of the LW-IRSPOS is higher than 0.21 at a spatial frequency of 13.5 lp/mm in the cryogenic environment. This LW-IRSPOS has been successfully applied to the ground experiment of a space infrared detection system.
AB - The ground experiment of a spaceborne infrared detection system requires to generate infrared images that simulate infrared characteristics of space targets under laboratory conditions. The infrared images are physically generated by an infrared scene generator and projected to the detection system by an infrared scene projection optical system (IRSPOS). In this paper, a middle-wave IRSPOS (MW-IRSPOS) and a long-wave IRSPOS (LW-IRSPOS) are designed to operate in the cryogenic environment. The IRSPOSs have an operating temperature range of 100–350 K and operating wavebands of 3–5 μm and 8–10 μm, respectively. The thermal deformation of the IRSPOS structures is analyzed, and the IRSPOS structures are optimized to ensure the temperature adaptability. The LW-IRSPOS prototype is fabricated according to the analysis results, and the infrared scene projection experiment is carried out. Experimental results show that the modulation transfer function (MTF) of the LW-IRSPOS is higher than 0.21 at a spatial frequency of 13.5 lp/mm in the cryogenic environment. This LW-IRSPOS has been successfully applied to the ground experiment of a space infrared detection system.
KW - Blackbody micro cavity array
KW - Cryogenic optical system
KW - Infrared scene projection optical system
KW - Modulation transfer function
KW - Thermal deformation
UR - https://www.scopus.com/pages/publications/85145590828
U2 - 10.1016/j.infrared.2022.104484
DO - 10.1016/j.infrared.2022.104484
M3 - Article
AN - SCOPUS:85145590828
SN - 1350-4495
VL - 128
JO - Infrared Physics and Technology
JF - Infrared Physics and Technology
M1 - 104484
ER -