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Diffraction Efficiency Change in PVA/AA Photopolymer Films by SeO2 and TiO2 Nano Particle Addition

PVA/AA계 광 고분자 필름의 SeO2 및 TiO2 나노 입자 첨가에 의한 회절 효율 변화

  • Joe, Ji-Hun (Polymer Material Laboratory, Department of Chemistry Engineering, Kwangwoon University) ;
  • Lee, Ju-Chul (Polymer Material Laboratory, Department of Chemistry Engineering, Kwangwoon University) ;
  • Yoon, Sung (Polymer Material Laboratory, Department of Chemistry Engineering, Kwangwoon University) ;
  • Nam, Seung-Woong (Polymer Material Laboratory, Department of Chemistry Engineering, Kwangwoon University) ;
  • Kim, Dae-Heum (Polymer Material Laboratory, Department of Chemistry Engineering, Kwangwoon University)
  • 조지훈 (광운대학교 화학공학과 고분자소재연구실) ;
  • 이주철 (광운대학교 화학공학과 고분자소재연구실) ;
  • 윤성 (광운대학교 화학공학과 고분자소재연구실) ;
  • 남승웅 (광운대학교 화학공학과 고분자소재연구실) ;
  • 김대흠 (광운대학교 화학공학과 고분자소재연구실)
  • Received : 2010.01.25
  • Accepted : 2010.04.14
  • Published : 2010.04.25

Abstract

Photopolymer is a material for recording three dimensional holograms containing photo information. Photopolymer has been found to be a proper material due to many advantages such as high DE value, easy processing, and low price. Compositions of PVA, monomer, initiater and photosensitizer were determined by previous experiments and the compositions of $SeO_2$ and $TiO_2$ were considered as variable to find out the effects of $TiO_2$ on DE. The DE values were constant for the varying compositions of $TiO_2$ (0.1 mg~1.0 mg). In other words, $TiO_2$ is not directly effective on the DE values. Composition change experiments from $SeO_2$ 0.1 mg, $TiO_2$ 0.9 mg to $SeO_2$ 0.9 mg, $TiO_2$ 0.1 showed a maximum DE value of 73.75% at a component of $SeO_2$ 0.8 mg, $TiO_2$ 0.2 mg. It seemed that regardless of the amount of $TiO_2$, increasing the amount of $SeO_2$ gently increases DE`s. If nano particles are heavily added, transparent films could not be made due to the separation of particles by the solubility decrease. Photopolymer films could be made with high DE values for an extensive angle range if $TiO_2$ additions were kept minimum and $SeO_2$ additions were kept maximum.

Acknowledgement

Supported by : 광운대학교

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