천문학회보 (The Bulletin of The Korean Astronomical Society)

한국천문학회 (The Korean Astronomical Society)
권호 표지

Mirrors and Optomechanical Structures Design and Analysis for Linear Astigma-tism Free Three Mirror System (LAF-TMS)

  • Park, Woojin (School of Space Research, Kyung Hee University) ;
  • Hammar, Arvid (Omnisys Instrument AB) ;
  • Lee, Sunwoo (School of Space Research, Kyung Hee University) ;
  • Chang, Seunghyuk (Center for Integrated Smart Sensors, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Kim, Sanghyuk (Optical Astronomical Technology Group, Korea Astronomy and Space Science Institute) ;
  • Jeong, Byeongjoon (Korea Basic Science Institute) ;
  • Kim, Geon Hee (Korea Basic Science Institute) ;
  • Kim, Daewook (College of Optical Sciences, University of Arizona) ;
  • Pak, Soojong (School of Space Research, Kyung Hee University)
  • 발행 : 2018.10.10
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초록

Linear Astigmatism Free - Three Mirror System (LAF-TMS) is the linear astigmatism free off-axis wide field telescope with D = 150 mm, F/3.3, and $FOV=5.51^{\circ}{\times}4.13^{\circ}$. We report the design and analysis results of its mirrors and optomechanical structures. Tolerance allowance has been analyzed to the minimum mechanical tolerance of ${\pm}0.05mm$ that is reasonable tolerance for fabrication and optical alignment. The aluminum mirrors are designed with mounting flexure features for the strain-free mounting. From Finite Element Analysis (FEA) results of mounting torque and self-weight, we expect 33 - 80 nm RMS mirror surface deformations. Shims and the L-bracket are mounted between mirrors and the mirror mount for optical alignment. The mirror mount is designed with four light-weighted mechanical parts. It can stably and accurately fix mirrors, and it also suppresses some of stray light.

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