Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on the Evaluation of the Optical Head of a Near-field Optical Recording System and Interference Pattern Analysis

근접장 광기록 헤드의 광학적 성능 평가와 정렬 오차에 대한 간섭 무늬 패턴 분석에 대한 연구

  • 윤형길 (한국과학기술원 기계공학과 NOM연구실) ;
  • 권대갑 (한국과학기술원 기계공학과) ;
  • 이준희 (한국과학기술원 기계공학과) ;
  • 정재화 (한국과학기술원 기계공학과) ;
  • 오형렬 ((주)Hysonic, 한양대학교 안산캠퍼스 내)
  • Published : 2005.05.01
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Abstract

Optical performance evaluation results and an interference fringe pattern analysis of alignment errors for an optical head of a near-field receding (NFR) system are presented. The focusing unit is an optical head of a NFR system and is composed of a solid immersion lens (SIL) and an objective lens (OL). Generally, the size of the focusing unit is smaller than that of the conventional optical recording head. Hence there are difficulties to assemble the small focusing unit precisely. We composed an evaluation system with an interferometer and evaluated some focusing unit samples aligned and assembled by manual and present the obtained results. Using the conventional optical tool, Code V, a tolerance analysis of the alignment error between the SIL and the objective lens and an interference pattern analysis for the assembly error are executed. Then, through an analysis of the simulation results, the conceptual auto-alignment methodology using a neural network approach is considered.

Keywords

References

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