Crosstalk Noise by Shrinkage of Thick Holographic Photopolymer

광폴리머를 사용한 두꺼운 홀로그램의 수축에 의한 혼선잡음

  • 황용섭 (대우일렉트로닉스 선행기술연구소 DM 연구 2 팀) ;
  • 김근율 (대우일렉트로닉스 선행기술연구소) ;
  • 박주연 (대우일렉트로닉스 선행기술연구소) ;
  • 남하은 (대우일렉트로닉스 선행기술연구소)
  • Published : 2005.10.01

Abstract

The crosstalk noise of thick holographic photopolymer is studied. Three different experiments, (1) reading area dependency (2) post-exposure effect (3) effect of later recorded holograms on earlier recorded holograms, have been accomplished and a tendency of crosstalk noises has been found for each case. The larger reading area, the higher crosstalk noises fur the later recorded holograms. Before the post-exposure the crosstalk noises are higher in the earlier recorded holograms, but after the post-exposure the crosstalk noises we higher in the later recorded holograms. The crosstalk noises of the earlier recorded holograms become higher as more holograms are recorded by multiplexing. To explain the tendency of crosstalk noises of these experiments, we suggest a model considering the anisotropic shrinkage of the photopolymer According to the model. the shrinkage is more dominant at the center of the recorded region than the edge of that. After the post-exposure, however, the amount of shrinkage becomes the same far the whole recorded region. The results of all three experiments are well explained by this model.