Speckle contrast in near field scattering limited by time coherence

被引：6

作者：

Li, Gaoming ^{[1
,2
]}

Qiu, Yishen ^{[1
]}

Li, Hui ^{[1
]}

Huang, Yan ^{[1
]}

Liu, Shou ^{[2
]}

Huang, Zhiyun ^{[1
]}

机构：

[1] Fujian Normal Univ, Fujian Prov Key Lab Photon Technol, Minist Educ, Key Lab OptoElect Sci & Technol Med, Fuzhou 350007, Peoples R China

[2] Xiamen Univ, Sch Phys & Mech & Elect Engn, Xiamen 361005, Peoples R China

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 04期

基金：

中国国家自然科学基金;

关键词：

INTENSITY CORRELATIONS; LIGHT; FLUCTUATIONS;

D O I：

10.1364/OE.19.003694

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The relationship between the speckle contrast of scattered light in near field and longitudinal distance that is perpendicular to scattering surface is investigated. The experiment indicates that when using the laser illumination source with proper time coherence length, the curve of speckle contrast vs. longitudinal distance appears minimum turning point. The position and value of minimum point are decided by the coherence of light and scattering matter. It is easy to obtain the correlation area of scattered light by measuring the minimum point position and the illuminated area. Comparing to traditional scattering technique, this method can simultaneously measure the roughness parameters of surface height variance and surface height correlation area. (C) 2011 Optical Society of America

引用

页码：3694 / 3702

页数：9

共 11 条

[1] A schlieren method for ultra-low-angle light scattering measurements [J].