Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens

Bruno F. Pouet; Sridhar Krishnaswamy

doi:10.1117/12.216849

Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens

Bruno F. Pouet^*, Sridhar Krishnaswamy

^*Corresponding author for this work

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	Society of Photo-Optical Instrumentation Engineers
Pages	532-543
Number of pages	12
Volume	2622
Edition	2
ISBN (Print)	0819419869, 9780819419866
DOIs	https://doi.org/10.1117/12.216849
State	Published - 1995
Event	Optical Engineering Midwest'95. Part 2 (of 2) - Chicago, IL, USA Duration: May 18 1995 → May 19 1995

Other

Other	Optical Engineering Midwest'95. Part 2 (of 2)
City	Chicago, IL, USA
Period	5/18/95 → 5/19/95

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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10.1117/12.216849

Cite this

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title = "Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens",

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.",

author = "Pouet, {Bruno F.} and Sridhar Krishnaswamy",

year = "1995",

doi = "10.1117/12.216849",

language = "English (US)",

isbn = "0819419869",

volume = "2622",

pages = "532--543",

booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "Society of Photo-Optical Instrumentation Engineers",

edition = "2",

note = "Optical Engineering Midwest'95. Part 2 (of 2) ; Conference date: 18-05-1995 Through 19-05-1995",

}

Pouet, BF & 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 edn, vol. 2622, Society of Photo-Optical Instrumentation Engineers, pp. 532-543, Optical Engineering Midwest'95. Part 2 (of 2), Chicago, IL, USA, 5/18/95. https://doi.org/10.1117/12.216849

Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens. / Pouet, Bruno F.; Krishnaswamy, Sridhar.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2622 2. ed. Society of Photo-Optical Instrumentation Engineers, 1995. p. 532-543.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens

AU - Pouet, Bruno F.

AU - Krishnaswamy, Sridhar

PY - 1995

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N2 - 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.

AB - 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.

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Application of photorefractive crystals for holographic interferometry of vibrating diffuse specimens

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