Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Center wavelength shift and the optical property stabilization in photopolymer according to the press

포토폴리머에서 압착에 의한 중심파장 이동과 광학 특성 안정화 실험

  • Kim, Eun-Seok (School of Electrical & Computer Engineering, Chungbuk National University) ;
  • Kim, Nam (School of Electrical & Computer Engineering, Chungbuk National University)
  • 김은석 (충북대학교 전기전자컴퓨터공학부) ;
  • 김남 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2004.02.01
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Abstract

The playback wavelength shift and the optical property stabilization of the reflection type photopolymer OmniDex film are studied as a function of pressure. As the center wavelength is changed from 632 nm to 482 nm, the bandwidth is 27％ broadened and the diffraction efficiency deviation maintained lower than 10％. These results show that the proposed color tuning method minimizes the change of optical properties more than 50％ compared with the diffusion-based method as the center wavelength changed from 511 nm to 630 nm. The press-based color tuning method shows that it could be used to make holographic optical elements that operate at wavelengths where lasers are not readily available for reflection type holographic recording.

반사형 포토폴리머인 OmniDe$x^{(R)}$ 필름을 이용하여 압착에 의한 중심파장 이동과 특성 안정화 정도를 측정하였다. 632 nm에서 482 nm까지 중심파장 이동에 대해 대역폭은 27% 확대되고, 회절효율의 변화는 10% 이내에서 유지되었다. 이는 확산에 기초한 방식이 511nm에서 630nm로의 중심파장 변화에 대해 대역폭은 67% 늘어나고, 회절효율은 18%감소한 것과 비교해 광학적 특성변화가 50% 정도 줄어들었음을 의미한다. 본 논문에서 제안한 압착방식은 반사형 홀로그램 격자를 이용한 광학소자에서 기록에 사용된 레이저 파장에 국한되지 않는 다양한 응용제품의 개발이 가능함을 보여주고 있다.

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References

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