Dewar Packaging Technology of Multiband Long-Wave Infrared Focal Plane Array Detectors for Cryogenic Optics

Junlin Chen; Xiaokun Wang; Haiyong Zhu; Zhijiang Zeng; Yaran Li; Shaobo Luo; Xi Wang; Chun Lin

doi:10.3788/CJL202249.2110002

Chinese Journal of Lasers, Volume. 49, Issue 21, 2110002(2022)

Dewar Packaging Technology of Multiband Long-Wave Infrared Focal Plane Array Detectors for Cryogenic Optics

Junlin Chen^1,2, Xiaokun Wang^1,2、*, Haiyong Zhu^1,2, Zhijiang Zeng^1,2, Yaran Li², Shaobo Luo^1,2, Xi Wang^1,2, and Chun Lin^1,2

Author Affiliations

¹State Key Laboratories of Transducer Technology, Shanghai Institute of Technical Physics, Chinese Acadamy of Sciences, Shanghai 200083, China

²Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

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Figures & Tables(12)

Fig. 1. Schematic of mercury cadmium telluride (MCT)

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Fig. 2. Schematic of multi-band MCT stitching

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Fig. 3. Structure of Dewar

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Fig. 4. Schematic of filter structure

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Fig. 5. Simulation analysis of the influence of filter position on Dewar’s optical characteristics. (a) Optical and mechanical structure of proposed system; (b) non-uniformity of detector; (c) stray light analysis of M1 module; (d) stray light analysis of M2 module

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Fig. 6. Schematic of heat leakage measurement of bellows

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Fig. 7. Temperature related to infrared calibration test

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Fig. 8. Cold platform structure for isolating coupling stress

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Fig. 9. Interference coupling stress test

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Fig. 10. Photo of Dewar

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Table 1. Measurement of thermal resistance of bellows
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Table 1. Measurement of thermal resistance of bellows
No. Q /W T₁ /K T₂ /K ΔT /K
1 0 74.45 153.5 79.05
2 0.101 77.6 193 115.4

Table 2. Main performance indexes of infrared focal plane array Dewar

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Table 2. Main performance indexes of infrared focal plane array Dewar

Item	Content	Item	Content
Temperature /K	55	Operative pixel percent	99.5%
Wave band /μm	B1: 11.5－12.5 μm	Response inhomogeneity	10%
	B2: 8.0－10.5 μm
	B3: 0.3－11.3 μm
Temperature difference /K	±0.4	Maximum size /(mm×mm×mm)	115×115×126
Pixed number	2000×12	Adapter cooler	Special
Pixel size /(μm×μm)	30×30	Heat load /mW	1350
Packaging	Dewar	Assembly mass/g	1750

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Junlin Chen, Xiaokun Wang, Haiyong Zhu, Zhijiang Zeng, Yaran Li, Shaobo Luo, Xi Wang, Chun Lin. Dewar Packaging Technology of Multiband Long-Wave Infrared Focal Plane Array Detectors for Cryogenic Optics[J]. Chinese Journal of Lasers, 2022, 49(21): 2110002

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