Phase-shifting dynamic holographic interferometry using BSO photorefractive crystals

Bruno F. Pouet*, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Holographic interferometry of phase objects as well as diffusely scattering opaque specimens is achieved in quasi real-time using two-wave mixing in photorefractive Bi 12SiO20 (BSO) crystals. In the case of diffusely scattering specimens, phase shifting holographic interferometry of a vibrating plate specimen is done by recording at least 3 double pulse holograms with different phase shifts of the reference beam. The good signal-to-noise ratio and resolution of the resulting holographic interferograms enable phase measurement of complex vibration modes. Quasi-heterodyne interferometry is also demonstrated for phase objects under non-recurring loading. A double exposure hologram with two separate reference beams at different incident angles for the two exposures is recorded in a BSO crystal. The two recorded object states are subsequently reconstructed by the reference beams at any desired phase by simply introducing a relative phase shift between the two readout reference beams. Because of the speed of the photorefractive effect and the lack of need for post processing, such a recording material allows image acquisition comparable in temporal resolution to electronic speckle techniques with the image quality of classical holography.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages152-157
Number of pages6
ISBN (Print)0819423238
StatePublished - Dec 1 1997
EventInt. Conference on Experimental Mechanics: Advances and Applications - Singapore, Singapore
Duration: Dec 4 1996Dec 4 1996

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2921
ISSN (Print)0277-786X

Other

OtherInt. Conference on Experimental Mechanics: Advances and Applications
CitySingapore, Singapore
Period12/4/9612/4/96

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Phase-shifting dynamic holographic interferometry using BSO photorefractive crystals'. Together they form a unique fingerprint.

Cite this