Reduction of speckle noise in the reconstructed image of digital hologram - art. no. 683227

被引：0

作者：

Ma, Lihong ^{[1
]}

Wang, Hui ^{[1
]}

Jin, Weimin ^{[1
]}

Jin, Hongzhen ^{[1
]}

机构：

[1] Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Peoples R China

来源：

HOLOGRAPHY AND DIFFRACTIVE OPTICS III | 2008年 / 6832卷

关键词：

digital holography; reconstructed image; speckle noise; intensity superposition;

D O I：

暂无

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：83227 / 83227

页数：6