Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Fabrication of holographic zone plate using dichromated gelatin hologram

Dichromated Gelatin 박막을 이용한 홀로그래픽 Zone Plate 제작 및 해석

  • Published : 1997.02.01
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Abstract

Holographic zone plate (HZP) is fabricated by interfering a plane wave and a spherical wave in a dichromated gelatin (DCG) film obtained from Agfa 8E75HD plates. We have developed a simple theory for HZP considering optical nonlinearity of DCG material. Analysis of our theory for HZP shows that it has infinite focal points at distances f,f/2, f/3,,…. In experiment, we observed the corresponding focal points of up to f/6 when illuminating HZP by a plane wave. It is also shown that the beam profile around the first focal point measured by using a knife-edge scanning method has a Gaussian shape.

Agfa 8E75HD 사진건판에서 얻은 dichromated gelatin(DCG) 박막에 구면파와 평면파를 간섭시켜 holographic zone plate(HZP)를 만들었다. DCG박막의 비서형적인 광학특성들을 고려하여 HZP의 이론식을 유도하였다. 이 이론식에 의한 HZP의 초점거리를 거리는 f. f/2, f/3, f/4, ... 였으며, 실험적으로도 평면파를 입사하여 6개까지의 해당 초점들을 관측하였다. 칼날 주사 방법으로 측정한 첫 번째 재생 초점 근처에서의 빔의 모양은 Gaussian 분포를 가짐을 확인하였다.

Keywords

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