스윙암 방식의 형상 측정기를 이용한 대형 반사경의 정밀가공에 관한 연구

Study on Fabrication of a Large Concave Mirror Surface Using a Swing-Arm Type Profilometer

  • 이기암 (충북대학교 대학원 기계공학과) ;
  • 김옥현 (충북대학교 기계공학부) ;
  • 이응석 (충북대학교 기계공학부)
  • 발행 : 2008.09.30

초록

Generally optical components are fabricated by grinding, lapping and polishing processes. Those processes take long time to obtain optical high surface quality. In the case of large optical components, the on-machine measurement is strongly recommended because the workpiece is fragile and difficult to set up for fabricating and measuring. This paper is concerned about a swing-arm mechanism which can be used for on-machine measurement of a surface profile with a sensing probe end-effect, and also for grinding or lapping the surface with a corresponding tool. The measuring accuracy and uncertainty using a swing arm type profilometer have been studied. The experimental results show that this method is useful specially in lapping process with the accuracy of $5{\mu}m$. Those inspection data are provided for correcting the residual figuring error in next processes.

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