Simplified Carre method for phase extraction

Lujie J. Chen; Chenggen Quan; Cho Jui Tay

doi:10.1117/12.621505

12 April 2005 Simplified Carre method for phase extraction

Lujie J. Chen, Chenggen Quan, Cho Jui Tay

Proceedings Volume 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics; (2005) https://doi.org/10.1117/12.621505
Event: Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, 2004, -, Singapore

Abstract

A phase-shifting algorithm for speckle patterns with a constant but unknown phase shift is proposed. The algorithm is based on the well known Carre's method. Prior to applying the phase-shifting algorithm a speckle pattern background is removed. In this process, manual intervention is minimal and high computational speed is achieved. In addition, high-frequency phase signal would not be filtered out in the noise reduction process as is the case in band-pass filtering technique. Its validity is tested on the deformation measurement using digital speckle shearing interferometry (DSSI).

Citation Download Citation

Lujie J. Chen, Chenggen Quan, and Cho Jui Tay "Simplified Carre method for phase extraction", Proc. SPIE 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, (12 April 2005); https://doi.org/10.1117/12.621505

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