Li Zongxuan, Jin Guang, Zhang Lei, Yan Yong, Xie Peng, Kong Lin. Support structure of large beam splitter in space[J]. Infrared and Laser Engineering, 2012, 41(8): 2096-2101.
Citation: Li Zongxuan, Jin Guang, Zhang Lei, Yan Yong, Xie Peng, Kong Lin. Support structure of large beam splitter in space[J]. Infrared and Laser Engineering, 2012, 41(8): 2096-2101.
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Support structure of large beam splitter in space

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  • Beamsplitterisacrucialpartofalargespaceopticalremotesensortosplittheimaginglight intotwobeams.Inordertosolvetheproblemofsupportingalargebeamsplitterofaspacecamera, theresearchworkonthesupportingsyructureofalargebeamsplitterwithadimensionof200mm200mm 200mmwasperformed.Thedesignofthesupportingstructureofalargecubicbeamsplitterbasedon thephilosophyofsemi-kinematicmountingandpassivethermalcompensationwaspresented.Thecontact pairconstrainswerebuilt,thenonlinearityoftheboundaryconditionwassimulatedandtheengineering analysisontheprismassemblyutilizingnonlinearfiniteelementmethodswasperformed.Theanalysis resultsindicatedthesurfacefigureprecisionofthebeamsplitter'sLightPassSurface,thusthePVvalue waslessthan73.2nmandtheRMSvaluewaslessthan12nmunderthecouplingofgravityand15℃ stationarytemperaturechange;thefirstnaturalfrequencyofthebeamsplitterassemblyreached183Hz. Thesupportingstructuredesignofthebeamsplittterisvalid,andcansatisfythedemandsonthe structuralstiffnessandthermalstabilityinthespaceenvironment.
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