• Title/Summary/Keyword: twin-image elimination

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Twin-Image Elimination in In-line Digital Holography Microscope (In-line 디지털 홀로그래피 현미경에서 쌍둥이 상 제거연구)

  • Cho, Hyung-Jun;Yu, Young-Hun
    • Korean Journal of Optics and Photonics
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    • v.18 no.2
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    • pp.117-121
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    • 2007
  • A fundamental problem in the in-line digital holography microscope is that the real image and virtual image and zero-order image are not separated spatially. In this paper, we have eliminated the zero-order noise by an averaging method and the twin image is divided using a geometrical set-up in an in-line digital holographic microscope. The size of the virtual image depends on the distance between the objective lens and the hologram plane and on the distance between the hologram plane and the image plane. We found that the virtual image size is smallest when the distance between the objective lens and the hologram plane is equal to the back focal length of the objective lens. We could divide the virtual image and real image by controlling the distance between the hologram plane and the objective lens.

Three-Dimensional Television using Optical Scanning Holography

  • Poon, Ting-Chung
    • Journal of Information Display
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    • v.3 no.3
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    • pp.12-16
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    • 2002
  • We first review a real-time three-dimensional (3-D) holographic recording technique called optical scanning holography (OSH) and discuss holographic reconstruction using spatial light modulators (SLMs). We then present how the overall system can be used for 3-D holographic television (TV) display with a wide-angle view of a 3-D image, and address some of the issues encountered. Finally, we suggest some techniques to alleviate the issues encountered in such a 3-D holographic TV system.