Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Ultraprecision Grinding of Glassy Carbon Core for Mold Press Lens

렌즈 성형용 유리탄소 금형의 초정밀연삭

  • Hwang, Yeon (Ultra-precision Optics Research Center, Korea Photonics Technology Institute) ;
  • Cha, Du-Hwan (Ultra-precision Optics Research Center, Korea Photonics Technology Institute) ;
  • Kim, Jeong-Ho (Ultra-precision Optics Research Center, Korea Photonics Technology Institute) ;
  • Kim, Hye-Jeong (Ultra-precision Optics Research Center, Korea Photonics Technology Institute)
  • 황연 (한국광기술원 초정밀광학연구센터) ;
  • 차두환 (한국광기술원 초정밀광학연구센터) ;
  • 김정호 (한국광기술원 초정밀광학연구센터) ;
  • 김혜정 (한국광기술원 초정밀광학연구센터)
  • Received : 2012.01.17
  • Accepted : 2012.01.31
  • Published : 2012.03.01
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Abstract

In this study, glassy carbon was ground for lens core of glass mold press. Ultraprecision grinding process was applied for machining of core surfaces. During the process, brittle crack occurred because of hard-brittleness of glassy carbon. Author investigated optimized grinding conditions from the viewpoint of ductile mode grinding. Geometrical undeformed chip thickness was adopted for critical chip thickness that enables crack free surface. Machined cores are utilized for biaspheric glass lens fabrication and surfaces of lens were compared for verification of ground surface.

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References

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