액정셀의 광학적 동특성 분석을 위한 실시간 측광식 편광계측기 : 제작과 성능시험

  • Yang, Byeong-Kwan (Department of Physics and Basic Science Research Institute, Chonbuk National University) ;
  • Rho, Bong-Gyu (Hyundai Electronics, Co. Ltd.) ;
  • Park, Chan (Department of Physics and Basic Science Research Institute, Chonbuk National University) ;
  • Kim, Jin-Seung (Department of Physics and Basic Science Research Institute, Chonbuk National University) ;
  • Kim, Jae-Ki (Agency of Defence Development)
  • 양병관 (전북대학교 물리학과 및 기초과학연구소) ;
  • 노봉규 (현대전자㈜) ;
  • 박찬 (전북대학교 물리학과 및 기초과학연구소) ;
  • 김진승 (전북대학교 물리학과 및 기초과학연구소) ;
  • 김재기 (국방과학연구소)
  • Published : 1997.12.01

Abstract

A division-of-amplitude type photopolarimeter has been constructed for the analysis of the dynamic optical characteristics of liquid crystal panels, one of the essential components of liquid crystal displays. In this instrument an incoming light ray, whose state of polarization is to be determined, is divided into three rays of nearly same intensities and of identical polarization state by using NPBS'(non-polarizing beam splitters). Each of the three rays is further divided into two components of orthogonal polarization states by using a PBS(polarizing cube beamsplitter) or by using a combination of a quater wave plate followed by a PBS. The intensity of each ray is measured by using a photodiode to produce a set of six photo-signals, which in turn are converted into four Stokes parameters describing the state of polarization of the incoming ray. Performance test of the insrument shows that its time resolution is 80 $mutextrm{s}$, accuracy $\pm$0.3 degrees when the state of polarization of the incoming ray is representated on the Poincare sphere.

Keywords

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