Volume 5 Issue 3
Jun.  2012
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SHAO Liang, YANG Fei, WANG Fu-guo, WU Xiao-xia. Design and optimization of supporting system for 1.2 m lightweight SiC primary mirror[J]. Chinese Optics, 2012, 5(3): 229-234. doi: 10.3788/CO.20120503.0229
Citation: SHAO Liang, YANG Fei, WANG Fu-guo, WU Xiao-xia. Design and optimization of supporting system for 1.2 m lightweight SiC primary mirror[J]. Chinese Optics, 2012, 5(3): 229-234. doi: 10.3788/CO.20120503.0229

Design and optimization of supporting system for 1.2 m lightweight SiC primary mirror

doi: 10.3788/CO.20120503.0229
  • Received Date: 18 Jan 2012
  • Rev Recd Date: 17 Mar 2012
  • Publish Date: 10 Jun 2012
  • A design based on 1.2 m lightweight SiC primary mirror is presented. An 18 point Whiffle-tree structure and a pressure bar are used for the axial support, and an A-Frame flexure mechanism and a tangent link are used for the lateral supporting system. The project of primary mirror design is disscussed in the principle, and the advantages are given. The parameters of mechanism are analyzed and optimized by the Finite Element Analysis(FEA) method. The whole FEA model is established, and the statics and thermal simulation analysis are accomplished. Experiments indicate that the Root Mean Square(RMS) of the mirror resulted from the supporting system is 3.5 nm at reference temperature, and it is 11.1 nm when the temperature difference is 40 ℃. The results show that the design could suit for the 1.2 m lightweight SiC mirror well, and thermal effect could be compensated successfully.

     

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