Phase-shifting laser scanning confocal microscopy moiré method and its applications

The laser scanning confocal microscopy (LSCM) moire method is an effective method for full-field displacement and strain measurement in the micrometer scale. In this study, the phase-shifting LSCM moire method is proposed for automatic processing of the moire fringe. A combined phase-shifting and lo...

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Bibliographic Details
Published in:Measurement science & technology 2010-05, Vol.21 (5), p.055110-055110
Main Authors: Tang, Minjin, Xie, Huimin, Wang, Qinghua, Zhu, Jianguo
Format: Article
Language:English
Subjects:
Confocal
Deformation
Lasers
Micrometers
Microscopy
Moire fringes
Phase shifters
Scanning
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Summary:The laser scanning confocal microscopy (LSCM) moire method is an effective method for full-field displacement and strain measurement in the micrometer scale. In this study, the phase-shifting LSCM moire method is proposed for automatic processing of the moire fringe. A combined phase-shifting and loading system for LSCM was developed, which could offer a tensile load on the plate type sample with a maximum load range of up to 500 N. Using the PZT (piezoelectric ceramic) phase shifter in the loading system, the moire fringe phase was shifted and measured. Full field deformation was calculated according to the phase data. With the combination of LSCM and the self-developed loading system, tensile deformation of the aluminum sample was measured by the phase-shifting LSCM moire technique. Full-field deformations under the different loads and elastic modulus of the sample were obtained. Experimental results demonstrated the feasibility of this technique, and the accuracy for deformation measurement is clearly improved.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/21/5/055110