Infrared and Laser Engineering, Volume. 50, Issue 10, 20210476(2021)
Design of support structure for space optical payloads with refocusing function (Invited)
Figures & Tables(15)
Table 1. Thermal refocusing range of different materials for support structure of space optical payloads
View tableView in ArticleTable 1. Thermal refocusing range of different materials for support structure of space optical payloads
Material Specific stiffness Thermal expansion coefficient Focusing range /mm TC4 25.9 9.1/10−6K−1 9.1×10−5βL0 SiCp/Al 61.2 8/10−6K−1 8×10−5βL0 Invar 17.4 0.54/10−6K−1 5.4×10−6βL0 M40 42.3 0 0
Table 2. Static analysis results
View tableView in ArticleTable 2. Static analysis results
Mirror Eccentric Tilt ΔX/μm ΔY/μm ΔZ/μm θX/(″) θY/(″) θZ/(″) Primary mirror Datum Datum Datum Datum Datum Datum Second mirror 4.6 0.02 - 0.02 3.9 -
Table 3. Analysis results of temperature inhomogeneity
View tableView in ArticleTable 3. Analysis results of temperature inhomogeneity
±0.2 ℃ Eccentric Tilt ΔX/μm ΔY/μm ΔZ/μm θX/(″) θY/(″) θZ/(″) Second mirror −0.001 5 1.838 1 0.519 −1.971 3 0.028 5 None
Table 4. Calculation results of support structure temperature change and focal position change
View tableView in ArticleTable 4. Calculation results of support structure temperature change and focal position change
Support structure temperature change/℃ 5 4 3 2 1 Focal position change/mm 0.382 0.311 0.234 0.157 0.079
Table 5. Measuring result of thermal optical test
View tableView in ArticleTable 5. Measuring result of thermal optical test
T/℃ $ \sigma ' $ $ \sigma '' $ MTF 23 −2.05 −0.341 809 028 0.085 8 22 −1.43 −0.238 432 639 0.080 9 21 −1.25 −0.208 420 139 0.083 2 20.5 −1.02 −0.170 070 833 0.081 6 20 −0.69 −0.115 047 917 0.080 8 19.5 −0.4 −0.066 694 444 0.083 3 17 0.54 0.090 037 5 0.081 9
Table 6. Thermal refocussing test in orbit
View tableView in ArticleTable 6. Thermal refocussing test in orbit
Number Temperature of supporting structure/℃ Dynamic MTF 1 19.4 0.044 2 2 18.4 0.043 6 3 20.0 0.058 8
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Shanshan Cong, Sheng Wang, Meijiao Sun, Zhipeng Xue, Fan Yang, Yu Wang, Maosheng Chen, Lei Zhang. Design of support structure for space optical payloads with refocusing function (Invited)[J]. Infrared and Laser Engineering, 2021, 50(10): 20210476
Paper Information
Category: Special issue—Advanced design and manufacturing of optical system
Received: Jul. 13, 2021
Accepted: --
Published Online: Dec. 7, 2021
The Author Email: Chen Maosheng (chenms0911@aliyun.com)
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