Zuoyu Xiao, Defeng Mo, Cui Fan, Jiajun Li, Xue Li, Haimei Gong. Analysis and Suppression of Stray Light in Multiband Infrared Dewar Components[J]. Laser & Optoelectronics Progress, 2025, 62(7): 0704003
- Laser & Optoelectronics Progress
- Vol. 62, Issue 7, 0704003 (2025)
Fig. 1. Packaging structure of Dewar with common optical path
Fig. 2. Stray ratio of critical surfaces. (a) Window; (b) window cap; (c) cold shield; (d) filter; (e) inner shell
Fig. 3. Cold shield blocks two kinds of stray light. (a) Cold screen is not raised; (b) raise the cold screen
Fig. 4. Simulation temperature distribution of multi-wave detector Dewar
Fig. 5. Simulation of the temperature distribution and deformation of the dichroic filter. (a)(c) Temperature distribution; (b)(d) deformation characteristics
Fig. 6. Design principle of cold shield blade of multi-wave detector
Fig. 7. Four cold shields. (a) Two vanes; (b) three vanes; (b) four vanes; (b) five vanes
Fig. 8. PST of cold shield (IR3)
Fig. 9. PST cold shield (IR2)
Fig. 10. Sample and magnified view of three blackened surfaces. (a) Graphene blackened coating; (b) black nickel plating; (c) polyimide plating
Fig. 11. Reflectivity of three blackened surfaces
Fig. 12. PST of cold shield with different surfaces (IR3)
Fig. 13. PST of cold shield with different surfaces (IR2)
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Table 1. Simulation average temperature of multi-wave detector Dewar
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Table 2. Test temperature of Dewar assembly of low temperature detector
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Table 3.
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