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Proceedings Paper

Coherent noise reduction in digital holographic phase contrast microscopy by varying the reference wave
Author(s): Yizhuo Zhang; Dayong Wang; Yunxin Wang; Zhiwei Zhou; Jie Zhao
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Paper Abstract

Digital holography is widely used as a high resolution metrological technique in many domains. As a coherent imaging method, the speckle noise is inherent in the system and degrades image quality and optical resolution. An improved fiber-space-hybrid lensless Fourier-transform digital holography system is proposed. Multiple holograms are recorded with different oblique illumination. All hologram are reconstructed individually using the same program and each reconstructed image has a different speckle pattern. The oblique illumination system is optimized by an automatic two dimensional scanning of the fiber tip. Thus only a limited illumination area of light spot is demanded. By averaging the reconstructed images, the speckle noise of the reconstructed image is reduced. We demonstrate the effectiveness of the technique experimentally. The proposed system is convenient and practical. It can lead to a high quality result automatically.

Paper Details

Date Published: 24 December 2011
PDF: 6 pages
Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 82042U (24 December 2011); doi: 10.1117/12.903597
Show Author Affiliations
Yizhuo Zhang, Beijing Univ. of Technology (China)
Dayong Wang, Beijing Univ. of Technology (China)
Yunxin Wang, Beijing Univ. of Technology (China)
Zhiwei Zhou, Beijing Univ. of Technology (China)
Jie Zhao, Beijing Univ. of Technology (China)


Published in SPIE Proceedings Vol. 8204:
Smart Nano-Micro Materials and Devices
Saulius Juodkazis; Min Gu, Editor(s)

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