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	Sound recovery via intensity variations of speckle pattern pixels selected with variance-based method 期刊论文 OAI收割 OPTICAL ENGINEERING, 2018, 卷号: 57, 期号: 2, 页码: 26117 作者: Zhu, Ge; Yao, Xu-Ri; Qiu, Peng; Mahmood, Waqas; Yu, Wen-Kai \| 收藏 \| 浏览/下载：130/0 \| 提交时间：2018/04/09 Sound Recovery Laser Speckle Patterns Intensity Variation High-speed Camera
	Information extraction from laser speckle patterns using wavelet entropy techniques (EI CONFERENCE) 会议论文 OAI收割 MIPPR 2011: Multispectral Image Acquisition, Processing, and Analysis, November 4, 2011 - November 6, 2011, Guilin, China 作者: Li X.-Z.; Wang X.-J. 收藏 \| 浏览/下载：41/0 \| 提交时间：2013/03/25 A novel speckle patterns processing method is presented using multi-scale wavelet techniques. Laser speckle patterns generated from the sample contained abundant information. In this paper we propose a method using wavelet entropy techniques to analyze the speckle patterns and exact the information on the sample surface. In our case we used this approach to test the solar silicon cell surface profiles based on the sym8 orthogonal wavelet family. According different wavelet entropy values the micro-structure of different solar silicon cell surfaces were comparative analyzed. Furthermore we studied the AFM and reflective spectra of the wafer. Results show that the wavelet entropy speckle processing method is effective and accurate. And the experiment proved that this method is a useful tool to investigate the surface profile quality. 2011 SPIE.
	Scaling and analyzing the influence of fluid surface of fluid with nano-granular through speckle pattern experiment (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Wang X.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/03/25 An optical system with double beam interference system was designed to measure the movement of nano-particles in fluid with laser speckle technology. In order to investigate the influence of the scattering light generated from liquid surface on speckle patterns the liquid surface contour was dynamically detected by WYKO during nano-particle movement. The result demonstrates that the fluctuation of fluid surface is slight. Meanwhile in order to further analyze this effect a piece of ground glass was employed. The process of ground glass to be polished to optical glass was studied and tested continuously using WYKO and laser speckle technology. And then the speckle patterns generated from kerosene fluid surface were studied. By contrast the results show that the fluid surface is transparent to the measurement wavelength. The influence of the surface of fluid can be neglected. Furthermore the conclusion illustrates that laser speckle technique is an effective and reliable method to study the movement of nano-granular in fluid.