Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A New Ray Tracing Method of a Plastic Lens Connected with finite-Element Analysis

유한요소해석과 연계한 플라스틱 렌즈의 광선추적 기법

  • 박근 (서울산업대학교 기계설계 자동화공학부) ;
  • 이상규 (서울산업대학교 기계설계 자동화공학부) ;
  • 전광식 (서울산업대학교 기계설계 자동화공학부) ;
  • 모필상 (서울산업대학교 기계설계 자동화공학부)
  • Published : 2005.12.01
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Abstract

The present work covers a new ray tracing scheme of an injection-molded plastic lens linked with finite element analysis fur injection molding processes. The traditional ray tracing schemes have been based on the assumption that optical property of the lens is homogeneous throughout the entire volume. However, this assumption is quite unrealistic for injection-molded plastic lenses since material properties vary at every point due to injection molding effects. In order to consider non-homogeneous property of a lens, a modified ray tracing method is proposed in connection with finite element analysis of injection molding. Through the analysis of the injection molding process, the distribution of refractive indices can be obtained. This information is then utilized in the proposed ray tracing scheme based on finite element meshes so as to take into account variation of the refractive indices. The effect of mold temperature is also investigated through finite element analysis, and the relevant optical quality is evaluated through the proposed ray tracing simulation.

Keywords

References

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