物理学报2001，Vol.50Issue(5)：860-864,5.
变孔径像面散斑平均光强标定随机表面的理论与实验
THEORY AND EXPERIMENT FOR THE CHARACTERIZATION OF RANDOM SURFACES BY THE AVERAGE INTENSITY OF IMAGE SPECKLES OF VARIABLE APERTURES
摘要
Abstract
Using the Gaussian correlation model of random surfaces, we conduct the theoretical derivation of the image-plane intensity produced by a weak scatterer in the 4f optical filtering system.Then the method is proposed for characterizing the square-root-mean deviation roughness and lateral correlation length.This method uses the derived theoretical expressions to fit the experimentally measured curve of image speckle intensity versus the radius of filtering aperture,and the two surface parameters can be extracted simultaneously.In the experiment,random surface samples are specially made and their surface parameters are measured. The results conforms with those obtained by atomic force microscopy,which shows that the method of this paper is of good accuracy.关键词
弱散射体/像面散斑/平均光强分类
数理科学引用本文复制引用
张宁玉,滕树云,董前民,亓东平,程传福..变孔径像面散斑平均光强标定随机表面的理论与实验[J].物理学报,2001,50(5):860-864,5.基金项目
国家自然科学基金（批准号：69978012)资助的课题. （）
