Temporal averaging of phase measurements in the presence of spurious phase drift: Application to phase-stepped real-time holographic interferometry

B. Ovryn; E. M. Haacke

doi:10.1364/AO.32.000147

Temporal averaging of phase measurements in the presence of spurious phase drift: Application to phase-stepped real-time holographic interferometry

B. Ovryn, E. M. Haacke

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A technique that compensates for low spatial frequency spurious phase changes during an interference experiment is developed; it permits temporal averaging of multiple phase measurements, made before and after object displacement. The method is tested with phase-stepped real-time holographic interferometry applied to cantilever bending of a piezoelectric bimorph ceramic. Results indicate that temporal averaging of the corrected data significantly reduces the white noise in a phase measurement without incurring systematic errors or sacrificing spatial resolution. White noise is reduced from 30 to less than 10 (λ/360) using these methods. Key words: Temporal averaging, compensation, phase stepping, phase drift, holographic interferometry.

Original language	English (US)
Pages (from-to)	147-154
Number of pages	8
Journal	Applied Optics
Volume	32
Issue number	2
DOIs	https://doi.org/10.1364/AO.32.000147
State	Published - Jan 10 1993
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.32.000147

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title = "Temporal averaging of phase measurements in the presence of spurious phase drift: Application to phase-stepped real-time holographic interferometry",

abstract = "A technique that compensates for low spatial frequency spurious phase changes during an interference experiment is developed; it permits temporal averaging of multiple phase measurements, made before and after object displacement. The method is tested with phase-stepped real-time holographic interferometry applied to cantilever bending of a piezoelectric bimorph ceramic. Results indicate that temporal averaging of the corrected data significantly reduces the white noise in a phase measurement without incurring systematic errors or sacrificing spatial resolution. White noise is reduced from 30 to less than 10 (λ/360) using these methods. Key words: Temporal averaging, compensation, phase stepping, phase drift, holographic interferometry.",

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Temporal averaging of phase measurements in the presence of spurious phase drift: Application to phase-stepped real-time holographic interferometry

Abstract

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