Phase-measuring fiber optic electronic speckle pattern interferometer: phase step calibration and phase drift minimization

Charles Joenathan; Brij M. Khorana

doi:10.1117/12.56066

1 February 1992 Phase-measuring fiber optic electronic speckle pattern interferometer: phase step calibration and phase drift minimization

Charles Joenathan, Brij M. Khorana

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Optical Engineering, Vol. 31, Issue 2, (February 1992). https://doi.org/10.1117/12.56066

Abstract

A phase-measuring fiber optic electronic speckle pattern interferometer (ESPI) was recently constructed and demonstrated. In this arrangement, phase stepping is introduced by stretching the fiber wrapped around a piezoelectric transducer. Calibration of the phase step is critical in phase measurement techniques for obtaining good phase plots. Methods used for calibrating the stretcher are outlined and the drifts in the phase caused by fluctuations in temperature and mechanical stresses are discussed. Ways to minimize this drift are also presented.

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Charles Joenathan and Brij M. Khorana "Phase-measuring fiber optic electronic speckle pattern interferometer: phase step calibration and phase drift minimization," Optical Engineering 31(2), (1 February 1992). https://doi.org/10.1117/12.56066

Published: 1 February 1992

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