EXPERIMENTAL INVESTIGATION OF THE LONGITUDINAL CHARACTERISTICS OF LASER SPECKLE

被引：12

作者：

HALFORD, CE

GAMBLE, WL

GEORGE, N

机构：

[1] UNIV ROCHESTER,INST OPT,ROCHESTER,NY 14627

[2] USA,MISSILE COMMAND,REDSTONE ARSENAL,AL 35898

来源：

OPTICAL ENGINEERING | 1987年 / 26卷 / 12期

关键词：

LASER BEAMS - Effects;

D O I：

10.1117/12.7977166

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The longitudinal dimension of laser speckle was measured in the near field of a uniformly illuminated frosted-glass diffuser. Theory indicates that the speckle produced by the circular spot varies according to lambda L**2/D**2, where lambda is the wavelength of the laser, L is the distance from the observation position to the diffuser, and D is the diameter of the illuminated spot. A single wavelength was used, allowing variation with respect to L and D to be measured. The experimental results obtained match the theory. More than 400 speckle lengths were measured, normalized by multiplying by D**2/L**2, and statistically analyzed to determine a mean of 11 mu m and a standard deviation of 2. 5 mu m.

引用

页码：1263 / 1264

页数：2