Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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A Study on Key Parameters and Characteristics in the Manufacturing Process of the Dual Pickup Objective Lens

Dual Pickup 대물렌즈의 생산을 위한 주요 Parameter 및 특성에 관한 연구

  • 우선희 (한국항공우주연구원 통신해양기상위성사업단 탑재체팀) ;
  • 이동주 (충남대학교 기계공학과)
  • Published : 2007.06.15
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Abstract

In order to operate CD and DVD compatibly in a pickup system, the objective lens comprise diffractive optical element(DOE) zone and aspheric curvature on its lens surface. The DOE objective lens is effective to simplify this dual-purpose pickup system of the 655nm and 785nm wavelength by using only one lens, but requires more precision manufacturing process and system due to the complicated shape. This paper presents the overall manufacturing process of this objective lens and describes main parameters in each process, for the correction of the aspheric surface in its core, the shrinkage compensation after injection molding, and the uniformity compensation by adjusting molding conditions.

Keywords

References

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