Optics and Precision Engineering, Volume. 32, Issue 2, 171(2024)
Design and optimization of cryogenic installation structure for gratings of Long-wave Infrared Spatial Heterodyne Interferometer
Figures & Tables(16)
Fig. 1. Optical system diagram of Long-wave infrared spatial heterodyne interferometer
Fig. 2. Main structural diagram of Long-wave infrared spatial heterodyne interferometer assembly
Fig. 7. Relationship between grating surface shape and diameter of adhesive bump
Fig. 9. Process of optical-mechanical-thermal coupling analysis of interferometer system
Fig. 12. Cryogenic test of Long-wave infrared spatial heterodyne interferometer
Fig. 13. Cryogenic test results of Long-wave infrared spatial heterodyne interferometer
Table 1. Main parameters of Long-wave infrared spatial heterodyne interferometer
View tableView in ArticleTable 1. Main parameters of Long-wave infrared spatial heterodyne interferometer
Parameter Values Spectral resolution 0.08 cm-1 Spectral range 1 130.58-1 147.03 cm-1 Central spectral wavelength 8.823 μm Target operating temperature 160 K （-115.15 ℃） Vacuum pressure 3×10-3 Pa Detector pixel size 30 μm Detector size 320×256
Table 2. Material properties of main structural of interferometer
View tableView in ArticleTable 2. Material properties of main structural of interferometer
Part name Material Density/
（Kg·m-3）
Thermal conductivity/
W·（m·K）-1
CTE/
（10-6·℃-1）
Frame 2A12 2 700 167 23.9 Grating mounting plate Interferometer base Interferometer base plate Grating substrate 4J32 8 050 10.4 1 Support leg TC4 4 430 7.3 8.8 Grating Silica 2 250 1.4 0.58 Beamsplitter ZnSe 5 270 11.72 7.1 Field-widened prism
Table 3. Influence of installation method on surface shape of grating
View tableView in ArticleTable 3. Influence of installation method on surface shape of grating
Grating installation method RMS PV Three points bonded of initial structure 7 135 39 990 Three points bonded with no radial constraint 18.71 83.97 Single point bonded with no radial constraint 0.711 1 3.482
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Yang WU, Yutao FENG, Bin HAN, Junqiang WU, Jian SUN. Design and optimization of cryogenic installation structure for gratings of Long-wave Infrared Spatial Heterodyne Interferometer[J]. Optics and Precision Engineering, 2024, 32(2): 171
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Received: Jun. 5, 2023
Accepted: --
Published Online: Apr. 2, 2024
The Author Email: FENG Yutao (fytciom@126.com)
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