Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Zero-Order Suppression by Scanning Method in Digital Holographic Microscope

디지털 홀로그래피 현미경에서의 스캐닝 방법을 이용한 영차회절광 제거

  • Published : 2006.04.01
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Abstract

A fundamental problem in digital holography is the presence of zero-order noise in the reconstruction process, which decreases the signal to noise ratio(SNR). For many applications, that reduction of SNR makes digital holography impractical, so a great number of approaches have been tested in order to overcome such a problem. In this paper we use the scanning method to suppress the zero-order diffraction noise and the interference noise between object beams. We demonstrate that it is possible to increase the image quality with the scanning method.

디지털 홀로그램에서 영상 재현 시 영차 회절광에 의한 잡음으로 신호대 잡음비가 좋은 영상을 구현하기 어렵다. 이와 같은 이유로 디지털 홀로그램이 여러 분야에 응용되는 것이 어렵다. 영차 회절광 제거를 위하여 많은 노력이 이루어져 왔다. 본 연구에서는 영차 회절광의 영향을 줄이기 위한 홀로그램 데이터를 스캐닝 방법으로 획득하여 수치적 처리를 통하여 영상을 재현하는 실험 연구를 하였다. 그 결과 본 연구에 사용된 방법이 영차 회절광의 효과를 줄이면서 해상도도 유지 할 수 있는 방법임을 알았다.

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References

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