Experimental study of regional fractal speckle produced in large angle scattering

Using the interference of speckle and the spherical reference wave, we extract the real and the imaginary parts of the complex amplitudes of the speckle in large angle scattering. By calculating the spatial correlation functions of intensity, we find that the speckle has a property of regional fract...

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Published inChinese physics B Vol. 19; no. 7; pp. 256 - 262
Main Author 宋洪胜 程传福 刘云燕 刘桂媛 滕树云
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.07.2010
Subjects
Amplitudes
Fractal analysis
Fractals
Gaussian
Mathematical analysis
Regional
Scattering
Statistics
分形指数
大角度
强度相关函数
散斑干涉
研究区域
空间相关函数
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/19/7/074204

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Summary:Using the interference of speckle and the spherical reference wave, we extract the real and the imaginary parts of the complex amplitudes of the speckle in large angle scattering. By calculating the spatial correlation functions of intensity, we find that the speckle has a property of regional fractality, i.e. the fractal exponent equals 1 in a small spatial region and it becomes less than 1 in a bigger region. The empirical analytic expression of the intensity correlation function is gained. The probability density distributions of the intensities and the complex amplitudes show that the regional fractal speckle still obeys zero-mean circular complex Gaussian statistics.
Bibliography:O348.12
regional fractal, speckle, Gaussian distribution
11-5639/O4
O18
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/7/074204