Mingdeng Hu, Xiong Xiong, Jianle Wu, Yu Duan, Yu Du, Jianhong Mao. Design of Cold Shield in Infrared Detector[J]. Acta Optica Sinica, 2023, 43(9): 0904001
- Acta Optica Sinica
- Vol. 43, Issue 9, 0904001 (2023)
Fig. 1. Lightpath of optical system off-axis point imaging
Fig. 2. Optical analysis model of infrared detector
Fig. 3. Height and uniformity distribution of cold shield. (a) Maximum response and temperature gradient curves in the focal plane of cold shield; (b) uniformity distribution in the focal plane
Fig. 4. Four designed structures for cold shield. (a) Tower type; (b) accordion type; (c) straight cylinder type; (d) inverted cone type
Fig. 5. PST curves of four cold shield structures at different F numbers. (a) F1.2; (b) F2; (c) F3; (d) F4; (e) F5.5
Fig. 6. Sidewall venting structure and radiation distribution. (a) Sidewall venting; (b) path of stray radiation; (c) radiation of sidewall venting
Fig. 7. Improved venting structures and radiation distribution. (a) Top venting; (b) countersunk venting; (c) step venting; (d) top venting radiation; (e) countersunk venting radiation; (f) step venting radiation
|
Table 1. Surface property parameters of optical analysis model
|
Table 2. Selection of cold shield structure under different F numbers
|
Table 3. Radiation of main surface inside the detector
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20