Flexible Support Structure of Lens for Spaceborne Thermal Infrared Long Wave Spectrometer

Table 1. Material performance parameters
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Table 1. Material performance parameters
Material Elastic modulus /GPa Poisson ratio μ Density ρ /（g·cm^-3） CTE /（10^-6·K）
ZnSe 67 0.28 5.2 7.1
4J45A 161 0.33 8.1 7.1
ZnS 74 0.29 4.1 6.6
4J29 141 0.30 8.1 5.7
S4J32B 141 0.33 8.1 0.1

Table 2. Orthogonal design
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Table 2. Orthogonal design
Level L /mm b /mm a /mm c /mm
1 10 3.0 0.6 0.3
2 11 3.5 0.8 0.6
3 12 4.0 1.0 0.9

Table 3. Results of orthogonal design experiment

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Table 3. Results of orthogonal design experiment

No.	Influencing factor /mm				Thermal stress /MPa
No.	L	b	a	c	Thermal stress /MPa
Range	3.000	10.667	3.666	1.666	‒
1	10	3.0	0.6	0.3	20
2	10	3.5	0.8	0.6	18
3	10	4.0	1.0	0.9	26
4	11	3.0	0.8	0.9	17
5	11	3.5	1.0	0.3	12
6	11	4.0	0.6	0.6	28
7	12	3.0	1.0	0.6	15
8	12	3.5	0.6	0.9	16
9	12	4.0	0.8	0.3	24

Table 4. Comparison of performance before and after mechanical test
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Table 4. Comparison of performance before and after mechanical test
Condition MTF
Upper field-of-view Center field-of-view Lower field-of-view
|∆| 0 +0.01 0
Before test 0.41 0.40 0.39
After test 0.41 0.41 0.39

Table 5. MTF test results of thermal infrared long wave spectrometer system
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Table 5. MTF test results of thermal infrared long wave spectrometer system
Row No. MTF
Column 10 Column 160 Column 310
7 0.38 0.38 0.46
14 0.40 0.41 0.47
21 0.42 0.43 0.48

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Guoqing Liu, Chao Ma, Zongcun Zhang, Shufeng Liu, Huairong Kang, Yaohui Zhang, Yunduan Li. Flexible Support Structure of Lens for Spaceborne Thermal Infrared Long Wave Spectrometer[J]. Chinese Journal of Lasers, 2024, 51(17): 1710003

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