中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74204-074204.doi: 10.1088/1674-1056/19/7/074204
程传福1, 滕树云1, 宋洪胜2, 刘桂媛2, 刘云燕3
Song Hong-Sheng(宋洪胜)a)b), Cheng Chuan-Fu(程传福)a)†, Liu Yun-Yan(刘云燕)a)c), Liu Gui-Yuan(刘桂媛)a)b), and Teng Shu-Yun(滕树云)a)
摘要: 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.
中图分类号: (Speckle and moiré patterns)