Improved max-min scanning method for phase determination

作     者：Ding, X Cloud, GL Raju, BB 

作者机构：Michigan State Univ Dept Mech Engn E Lansing MI 48824 USA USA Tank Automot Command Warren MI 48397 USA 

出 版 物：《OPTICAL ENGINEERING》 (光学工程)

年 卷 期：2004年第43卷第1期

页      面：63-68页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 0702[理学-物理学] 

基　　金：Research Excellence Fund of Michigan U.S. Army Michigan State University, MSU 

主　　题：phase shifting algorithm interferometry digital speckle pattern interferometry 

摘      要：We present an improved signal processing algorithm for the max-min scanning method for phase determination in speckle and other interferometric techniques. After recording the intensity changes at one point on the image for a range of arbitrary phase shifts, curve fitting is employed to obtain the intensity waveform corresponding to this position. The phase value is derived from this curve, and the sign of the computed phase angle is determined using the derivative of the fitting curve. The phase map is obtained by performing the same procedure throughout the entire image. This improved algorithm requires neither sorting the recorded image signals nor additional sign images. Experimental examples are provided. (C) 2004 Society of Photo-Optical Instrumentation Engineers.