Speckle size and decorrelation time; space-time correlation analysis of coherent light dynamically scattered from turbid media

被引：8

作者：

Rajan, Vinayakrishnan ^{[1
]}

Varghese, Babu ^{[1
]}

van Leeuwen, Ton G. ^{[1
]}

Steenbergen, Wiendelt ^{[1
]}

机构：

[1] Univ Twente, Inst Biomed Technol, Biophys Engn Grp, NL-7500 AE Enschede, Netherlands

来源：

OPTICS COMMUNICATIONS | 2008年 / 281卷 / 06期

关键词：

space-time correlation; speckle size; laser Doppler perfusion imaging; back-scattered light;

D O I：

10.1016/j.optcom.2007.11.025

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the dependence of the decorrelation time on the spatial intensity correlation of speckles generated in the far-field by back-scattered photons from turbid media. The effects contribute to an explanation of an earlier observation that the average Doppler width of the power spectrum of detector current fluctuations depends on the size of the illuminating laser beam. The space-time correlation of the speckles generated by a particle suspension illuminated by a collimated laser beam is analyzed from serial images taken by a high speed camera. It was found that larger spatial correlation distances, associated with large speckles, exhibit a slower temporal decorrelation. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1755 / 1760

页数：6

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