Edge enhancement by use of moving gratings in a bismuth silicon oxide crystal and its application to optical correlation

Zhao-Qi Wang; Hui Zhang; Colin M. Cartwright; Meisong Ding; Nick J. Cook; W. Allan Gillespie

doi:10.1364/AO.37.004449

Edge enhancement by use of moving gratings in a bismuth silicon oxide crystal and its application to optical correlation

Zhao-Qi Wang, Hui Zhang, Colin M. Cartwright, Meisong Ding, Nick J. Cook, W. Allan Gillespie

Abertay University

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The technique of moving gratings in a photorefractive crystal is applied to the edge enhancement of objects and edge-enhanced optical correlation. The nonlinear dependence of the optimum fringe velocity on the fringe modulation and the variation of the enhancement of the diffraction efficiency with fringe modulation at a fixed fringe velocity appropriate to high fringe modulations are experimentally investigated. It is shown that the diffraction at high fringe modulations, which corresponds to the high-spatial-frequency components of the Fourier spectrum, is enhanced by a factor of approximately 3.7, whereas the diffraction at low fringe modulations is suppressed by a factor of 0.6. The proposed technique has the advantages of real-time enhancement, arbitrary selection of the spatial frequency to be enhanced, and improved stability of the output. Experimental results of the edge enhancement of objects and edge-enhanced correlation are presented.

Original language	English
Pages (from-to)	4449-4456
Number of pages	8
Journal	Applied Optics
Volume	37
Issue number	20
DOIs	https://doi.org/10.1364/AO.37.004449
Publication status	Published - 1998

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title = "Edge enhancement by use of moving gratings in a bismuth silicon oxide crystal and its application to optical correlation",

abstract = "The technique of moving gratings in a photorefractive crystal is applied to the edge enhancement of objects and edge-enhanced optical correlation. The nonlinear dependence of the optimum fringe velocity on the fringe modulation and the variation of the enhancement of the diffraction efficiency with fringe modulation at a fixed fringe velocity appropriate to high fringe modulations are experimentally investigated. It is shown that the diffraction at high fringe modulations, which corresponds to the high-spatial-frequency components of the Fourier spectrum, is enhanced by a factor of approximately 3.7, whereas the diffraction at low fringe modulations is suppressed by a factor of 0.6. The proposed technique has the advantages of real-time enhancement, arbitrary selection of the spatial frequency to be enhanced, and improved stability of the output. Experimental results of the edge enhancement of objects and edge-enhanced correlation are presented.",

author = "Zhao-Qi Wang and Hui Zhang and Cartwright, {Colin M.} and Meisong Ding and Cook, {Nick J.} and Gillespie, {W. Allan}",

year = "1998",

doi = "10.1364/AO.37.004449",

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pages = "4449--4456",

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publisher = "The Optical Society",

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T1 - Edge enhancement by use of moving gratings in a bismuth silicon oxide crystal and its application to optical correlation

AU - Wang, Zhao-Qi

AU - Zhang, Hui

AU - Cartwright, Colin M.

AU - Ding, Meisong

AU - Cook, Nick J.

AU - Gillespie, W. Allan

PY - 1998

Y1 - 1998

N2 - The technique of moving gratings in a photorefractive crystal is applied to the edge enhancement of objects and edge-enhanced optical correlation. The nonlinear dependence of the optimum fringe velocity on the fringe modulation and the variation of the enhancement of the diffraction efficiency with fringe modulation at a fixed fringe velocity appropriate to high fringe modulations are experimentally investigated. It is shown that the diffraction at high fringe modulations, which corresponds to the high-spatial-frequency components of the Fourier spectrum, is enhanced by a factor of approximately 3.7, whereas the diffraction at low fringe modulations is suppressed by a factor of 0.6. The proposed technique has the advantages of real-time enhancement, arbitrary selection of the spatial frequency to be enhanced, and improved stability of the output. Experimental results of the edge enhancement of objects and edge-enhanced correlation are presented.

AB - The technique of moving gratings in a photorefractive crystal is applied to the edge enhancement of objects and edge-enhanced optical correlation. The nonlinear dependence of the optimum fringe velocity on the fringe modulation and the variation of the enhancement of the diffraction efficiency with fringe modulation at a fixed fringe velocity appropriate to high fringe modulations are experimentally investigated. It is shown that the diffraction at high fringe modulations, which corresponds to the high-spatial-frequency components of the Fourier spectrum, is enhanced by a factor of approximately 3.7, whereas the diffraction at low fringe modulations is suppressed by a factor of 0.6. The proposed technique has the advantages of real-time enhancement, arbitrary selection of the spatial frequency to be enhanced, and improved stability of the output. Experimental results of the edge enhancement of objects and edge-enhanced correlation are presented.

U2 - 10.1364/AO.37.004449

DO - 10.1364/AO.37.004449

M3 - Article

VL - 37

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EP - 4456

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SN - 1559-128X

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