Dynamic Phase Measurement in Shearography by Clustering Method

Details Dynamic Phase Measurement in Shearography by Clustering Method Dynamic Phase Measurement in Shearography by Clustering Method

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1236..349h&link_type=abstract

INTERNATIONAL CONFERENCE ON ADVANCED PHASE MEASUREMENT METHODS IN OPTICS AND IMAGING. AIP Conference Proceedings, Volume 1236,

Physics

Optics

Fourier Transform Optics, Wave Propagation, Phase Measurement, Holographic Interferometry, Optical Filters, Fourier Optics, Wave Fronts And Ray Tracing, Phase Retrieval, Holographic Interferometry, Other Holographic Techniques, Filters, Zone Plates, And Polarizers

Scientific paper

Phase measurement is a key step in quantitative optical metrology. While phase shifting technique is widely applied for accurate and reliable static or semi-static phase measurement, Fourier and wavelet transforms are often employed for high speed dynamic phase measurement. In our previous papers, the authors had proposed an alternative clustering method for dynamic phase measurement. The proposed method utilizes the phase clustering effect and the prior knowledge of the speckle field to extract the deformed phase map from one single deformed speckle pattern. The clustering method, however, may fails at area with abundant noise and large phase gradient. In this paper, we improve the clustering method by incorporating an advanced phase filtering methods for wrapped phase filtering. The reconstructed wrapped phase map after filtering is with very good quality and ready for phase unwrapping with simple unwrapping algorithms. The basic ideas and the implementation approach will be described in details. Several examples based on shearography will be given. Comparisons will be made between the proposed method and phase shifting method. The results demonstrate the accuracy and robustness of the integrated dynamic phase extraction method. The phase retrieval method proposed here have great potentials for structural material evaluation and vibration characterization in aircraft industry, automotive industry and related fields.

Affiliated with

Also associated with

No associations

Rating

Dynamic Phase Measurement in Shearography by Clustering Method does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamic Phase Measurement in Shearography by Clustering Method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic Phase Measurement in Shearography by Clustering Method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1802033