中国物理B ›› 2000, Vol. 9 ›› Issue (5): 353-358.doi: 10.1088/1009-1963/9/5/008

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FLAKE STRUCTURE IN THE SPECKLE FIELD PRODUCED BY A FEW SCATTERERS

亓东平1, 刘德丽2, 滕树云2, 程传福2   

  1. (1)Department of Mathematics and Physics, Shandong University of Technology, Jinan 250061, China; (2)Department of Physics, Shandong Normal University, Jinan 250014, China
  • 收稿日期:1999-10-27 出版日期:2000-05-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 69978012).

FLAKE STRUCTURE IN THE SPECKLE FIELD PRODUCED BY A FEW SCATTERERS

Liu De-li (刘德丽)a, Qi Dong-ping (亓东平)b, Teng Shu-yun (滕树云)a, Cheng Chuan-fu (程传福)a   

  1. a Department of Physics, Shandong Normal University, Jinan 250014, China; b Department of Mathematics and Physics, Shandong University of Technology, Jinan 250061, China
  • Received:1999-10-27 Online:2000-05-15 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 69978012).

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摘要： This paper reports a new phenomenon, namely, flake structure in the speckle field produced by a few scatterers. This structure appears in the off-axis region and its size is much larger than that of the normal speckles. The one-dimensional simulations show that as the roughness of the random surface sample increases or its lateral correlation length decreases, the flakes go farther away from the axis, their relative intensities increase, their sizes become bigger and the fluctuations in them decrease. A sub-scatterer model that we call isoclinic element is proposed to explain the formation and properties of flakes. Experimental evidence shows the existence of the flake structure.

Abstract: This paper reports a new phenomenon, namely, flake structure in the speckle field produced by a few scatterers. This structure appears in the off-axis region and its size is much larger than that of the normal speckles. The one-dimensional simulations show that as the roughness of the random surface sample increases or its lateral correlation length decreases, the flakes go farther away from the axis, their relative intensities increase, their sizes become bigger and the fluctuations in them decrease. A sub-scatterer model that we call isoclinic element is proposed to explain the formation and properties of flakes. Experimental evidence shows the existence of the flake structure.

中图分类号:  (Diffraction and scattering)

  • 42.25.Fx
42.30.Ms (Speckle and moiré patterns) 68.35.B- (Structure of clean surfaces (and surface reconstruction))