Phase-measuring fiber optic ESPI system: phase-step calibration and error sources

Charles Joenathan; Brij M. Khorana

doi:10.1117/12.57453

1 December 1991 Phase-measuring fiber optic ESPI system: phase-step calibration and error sources

Charles Joenathan, Brij M. Khorana

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.57453
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

In this paper we discuss a fiber optic electronic speckle pattern interferometer (ESPI) for obtaining 3D information about surface deformation. Phase stepping is introduced by stretching the fiber wrapped around a piezo-electric transducer. Two schemes to stretch the fiber are discussed. Also calibration of the phase step is critical in phase measurement techniques for obtaining good phase plots. In this paper we outline a method used for calibrating the stretcher. We also discuss the error in the phase caused by temperature changes.

Citation Download Citation

Charles Joenathan and Brij M. Khorana "Phase-measuring fiber optic ESPI system: phase-step calibration and error sources", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57453

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