Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Optical Properties of Aspheric Glass Lens using DLC Coated Molding Core

성형용 코어면 DLC 코팅에 의한 비구면 Glass렌즈 광학적 특성에 관한 연구

  • Kim, Hyun-Uk (Ultra Precision Optical Team, Korea Photonics Technology Institute(KOPTI)) ;
  • Cha, Du-Hwan (Ultra Precision Optical Team, Korea Photonics Technology Institute(KOPTI)) ;
  • Lee, Dong-Gil (Ultra Precision Optical Team, Korea Photonics Technology Institute(KOPTI)) ;
  • Kim, Sang-Suk (Ultra Precision Optical Team, Korea Photonics Technology Institute(KOPTI)) ;
  • Kim, Hye-Jeong (Ultra Precision Optical Team, Korea Photonics Technology Institute(KOPTI)) ;
  • Kim, Jeong-Ho (Ultra Precision Optical Team, Korea Photonics Technology Institute(KOPTI)) ;
  • Jeong, Sang-Hwa (Department of Mechanical Eng., Chosun Univ.)
  • 김현욱 (한국광학기술원 초정밀광학팀) ;
  • 차두환 (한국광학기술원 초정밀광학팀) ;
  • 이동길 (한국광학기술원 초정밀광학팀) ;
  • 김상석 (한국광학기술원 초정밀광학팀) ;
  • 김혜정 (한국광학기술원 초정밀광학팀) ;
  • 김정호 (한국광학기술원 초정밀광학팀) ;
  • 정상화 (조선대학교 기계공학과)
  • Published : 2007.10.25
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Abstract

In this research, the optimal grinding condition has been obtained by design of experiment (DOE) fur the development of aspheric lens for the 3 Mega Pixel, 2.5x optical zoom camera-phone module. Also, the tungsten carbide (WC) mold was processed by the method of ultra precision grinding under this optimal grinding condition. The influence of diamond-liked carbon (DLC) coating on form accuracy (PV) and surface roughness (Ra) of the mold was evaluated through measurements after DCL coating using ion plating on the ground mold. Also, aspheric glass lenses were molded, some before DLC coating of the mold and some after the DLC coating. The optical characteristics of each sample, molded by the different molds, were compared with each other.

본 연구에서는 3 메가픽셀, 2.5배 줌 카메라폰 모듈용 비구면 유리렌즈 개발을 목적으로 실험계획법(DOE)을 적용하여 성형용 초경 코어의 연삭가공조건을 구하고, 이를 활용하여 비구면 Glass렌즈 성형용 초경합금(WC) 코어를 초정밀 연삭가공을 수행하였다. 또한 가공된 성형용 코어의 가공면 위에 이온증착법으로 다이아몬드상 탄소(Diamond-Like Carbon; DLC) 코팅을 수행하여 DLC 코팅이 성형용 코어의 형상정도(PV)와 표면조도(Ra)에 미치는 영향을 평가하였으며, 비구면 Glass렌즈를 동일한 조건에서 성형하여 성형렌즈의 광학적 특성을 비교하여 성형용 코어면의 DLC 코팅 효과에 대하여 검토하였다.

Keywords

References

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