Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens

Bruno F. Pouet*, Sridhar Krishnaswamy

*Corresponding author for this work

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

Abstract

Real-time interferometry of vibrating specimens is achieved using two-wave mixing in Bi12SiO20 (BSO). By using anisotropic self-diffraction in the photorefractive crystal, despite the small diffraction efficiency of the photorefractive grating, good fringe visibility and good signal to noise ratio are achieved by synchronizing the illumination with the CCD camera. In addition, the application of an external electric field is used to enhance the diffraction efficiency of the photorefractive grating. This greater efficiency makes possible the visualization of large diffusely scattering specimens. It is shown that the good SNR of the resulting holographic interferograms enables phase unwrapping which allows for quantitative deformation analysis. The performance of the photorefractive interferometer is compared with the performance of an electronic speckle pattern interferometer.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages532-543
Number of pages12
Volume2622
Edition2
ISBN (Print)0819419869, 9780819419866
DOIs
StatePublished - 1995
EventOptical Engineering Midwest'95. Part 2 (of 2) - Chicago, IL, USA
Duration: May 18 1995May 19 1995

Other

OtherOptical Engineering Midwest'95. Part 2 (of 2)
CityChicago, IL, USA
Period5/18/955/19/95

ASJC Scopus subject areas

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

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  • Cite this

    Pouet, B. F., & Krishnaswamy, S. (1995). Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens. In Proceedings of SPIE - The International Society for Optical Engineering (2 ed., Vol. 2622, pp. 532-543). Society of Photo-Optical Instrumentation Engineers. https://doi.org/10.1117/12.216849