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Proceedings Paper

Reduction of speckle noise in the reconstructed image of digital hologram
Author(s): Lihong Ma; Hui Wang; Weimin Jin; Hongzhen Jin
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Paper Abstract

A fundamental problem in optical and digital holography is the existence of speckle noise in the reconstructed image. Many approaches have been carried out in order to overcome this problem. In this paper a new technique to reduce the speckle noise is proposed based on the physical nature of speckle noise. The illumination direction of the object beam is changed to provide a different phase information for the same recorded object in an off-axis digital holographic setup and the holograms are recorded with different illumination directions. Then the intensity information of the reconstructed images is superposed and averaged to reduce the speckle noise. The theoretical analysis and experimental results are shown to valid our proposal. They prove that the technique can effectively reduce the speckle noise without ruining the object information.

Paper Details

Date Published: 4 January 2008
PDF: 6 pages
Proc. SPIE 6832, Holography and Diffractive Optics III, 683227 (4 January 2008); doi: 10.1117/12.756734
Show Author Affiliations
Lihong Ma, Zhejiang Normal Univ. (China)
Hui Wang, Zhejiang Normal Univ. (China)
Weimin Jin, Zhejiang Normal Univ. (China)
Hongzhen Jin, Zhejiang Normal Univ. (China)

Published in SPIE Proceedings Vol. 6832:
Holography and Diffractive Optics III
Yunlong Sheng; Dahsiung Hsu; Chongxiu Yu, Editor(s)

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