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

5 Citations (Scopus)

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)147-154
Number of pages8
JournalApplied Optics
Volume32
Issue number2
DOIs
StatePublished - Jan 10 1993
Externally publishedYes

Fingerprint

Holographic interferometry
holographic interferometry
Phase measurement
White noise
white noise
Piezoelectric ceramics
Systematic errors
piezoelectric ceramics
systematic errors
spatial resolution
interference
Experiments

Keywords

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

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Temporal averaging of phase measurements in the presence of spurious phase drift : Application to phase-stepped real-time holographic interferometry. / Ovryn, B.; Haacke, E. M.

In: Applied Optics, Vol. 32, No. 2, 10.01.1993, p. 147-154.

Research output: Contribution to journalArticle

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