Rapid processing for statistical properties of laser speckle with thermal spraying surface

Chenbo Zhou; Jianxin Wang; Chuangcun Wang; Wenying Yu

doi:10.1117/12.572130

11 January 2005 Rapid processing for statistical properties of laser speckle with thermal spraying surface

Chenbo Zhou, Jianxin Wang, Chuangcun Wang, Wenying Yu

Proceedings Volume 5642, Information Optics and Photonics Technology; (2005) https://doi.org/10.1117/12.572130
Event: Photonics Asia, 2004, Beijing, China

Abstract

A new quick processing method to obtain the statistical properties of the weak laser speckle in free-space diffraction field whose speckle contrast V is less than 1 has been presented in this paper. During the process of experimental work, the conventional hypothesis of the laser speckle statistical regularity of keeping roundness was used. Based on the hypothesis, many images of laser speckle in different detection angles by a CCD sensor on the surface of samples coated with thermal sprayed with ZrO₂8Y₂O₃ have been processed. The density distribution of probability and the contrast of speckles were obtained. Even though the processing experimental data is gray-matrix but the intensity-matrix, the results are the same. The rationality of the process and the density distribution of probability are discussed in this paper. The experimental results accord well with the theoretical analysis and indicate that the method is feasible. This method makes the measurement of the surface roughness by laser speckle more convenient.

Citation Download Citation

Chenbo Zhou, Jianxin Wang, Chuangcun Wang, and Wenying Yu "Rapid processing for statistical properties of laser speckle with thermal spraying surface", Proc. SPIE 5642, Information Optics and Photonics Technology, (11 January 2005); https://doi.org/10.1117/12.572130

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