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Properties of Movement and Boiling of Speckles Produced by Moving Objects Illuminated with Partially Coherent Light |
| TENG Shu-Yun1;CHENG Chuan-Fu1,2;LIU Man2;LIU Li-Ren1;XU Zhi-Zhan1 |
| 1Shanghai Institute of Optics and Fine Mechnics, Chinese Academic of Sciences, PO Box 800-216, Shanghai 201800
2Department of Physics, Shandong Normal University, Ji’nan 250014
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| Cite this article: |
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TENG Shu-Yun, CHENG Chuan-Fu, LIU Man et al 2003 Chin. Phys. Lett. 20 68-71 |
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Abstract Properties of movement and the boiling of dynamic partially coherent speckles are investigated. Theoretical analysis of the correlation functions shows that in front of and behind the Fraunhofer plane, the directions of the movement of the dynamics partially coherent speckles are the same and opposite to that of the object, respectively. The boiling occurs according to a parabolic factor with respect to time separation τ. These properties are observed experimentally by using an elaborately chosen extended source to meet the requirement of intensity and coherence. The boiling of the speckles is measured with the photon counting system, which is refitted for the automatic data acquisition, and the experimental results are conformed by the theory.
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| Keywords:
42.30.Ms
42.25.Fx
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Published: 01 January 2003
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| PACS: |
42.30.Ms
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(Speckle and moiré patterns)
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42.25.Fx
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(Diffraction and scattering)
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