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 journalArticle

4 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 3° to less than 1° (λ/360) using these methods.

Original languageEnglish (US)
Pages (from-to)1087-1094
Number of pages8
JournalApplied Optics
Volume32
Issue number7
DOIs
StatePublished - Mar 1993

Keywords

  • Compensation
  • Holographic interferometry
  • Phase drift
  • Phase stepping
  • Temporal averaging

ASJC Scopus subject areas

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

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