Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 4449-4456 |
| Number of pages | 8 |
| Journal | Applied Optics |
| Volume | 37 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 1998 |
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Edge enhancement by use of moving gratings in a bismuth silicon oxide crystal and its application to optical correlation. / Wang, Zhao-Qi; Zhang, Hui; Cartwright, Colin M.; Ding, Meisong; Cook, Nick J.; Gillespie, W. Allan.
In: Applied Optics, Vol. 37, No. 20, 1998, p. 4449-4456.Research output: Contribution to journal › Article
TY - JOUR
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
SP - 4449
EP - 4456
JO - Applied Optics
JF - Applied Optics
SN - 1559-128X
IS - 20
ER -