具有大折射率涨落相关长度的介质散射光的空间相干性。

Spatial coherence of light scattered by media with large correlation length of refractive index fluctuations.

作者信息

Bertolotti M, Scudieri F, Verginelli S

出版信息

Appl Opt. 1976 Jul 1;15(7):1842-4. doi: 10.1364/AO.15.001842.

DOI:10.1364/AO.15.001842

PMID:20165274

Abstract

The effect of a large spatial correlation in a scattering medium on the spatial coherence of the scattered field is presented. Theoretical curves are calculated for a specific form of the correlation function of the dielectric susceptibility. It is shown that when the spot size of the incoming coherent light is of the same order as the correlation length of fluctuations a sudden increase in the spatial coherence of the scattered light occurs. The method is applied to the study of the correlation length in a liquid crystal cell under a dc electric field.

摘要

本文介绍了散射介质中较大空间相关性对散射场空间相干性的影响。针对介电常数相关函数的特定形式计算了理论曲线。结果表明，当入射相干光的光斑尺寸与涨落相关长度相当时，散射光的空间相干性会突然增加。该方法被应用于研究直流电场作用下液晶盒中的相关长度。