Shift-invariant real-time edge-enhanced VanderLugt correlator using video-rate compatible photorefractive polymer

A. Heifetz; G. S. Pati; J. T. Shen; J. K. Lee; M. S. Shahriar; C. Phan; M. Yamamoto

doi:10.1364/AO.45.006148

Shift-invariant real-time edge-enhanced VanderLugt correlator using video-rate compatible photorefractive polymer

A. Heifetz^*, G. S. Pati, J. T. Shen, J. K. Lee, M. S. Shahriar, C. Phan, M. Yamamoto

^*Corresponding author for this work

Electrical and Computer Engineering

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

19 Scopus citations

Abstract

We demonstrated a real-time shift-invariant VanderLugt correlator (VLC). The VLC was implemented with a 37 μm thick bis-triarylamine side-chain polymer matrix photorefractive (PR) poisoner composite operating at 532 nm wavelength. Correlation selectivity was enhanced by real-time edge enhancement. The advantage of the VLC is that its architecture allows overcoming the PR material response speed. A correlator of this type enables a fast shift-invariant search of a large optical image database. A high degree of shift invariance in our correlator was possible because of the material thickness. The angular bandwidth of this material was measured experimentally in a degenerate four-wave mixing setup, and it was found to be in a very good agreement with the theory.

Original language	English (US)
Pages (from-to)	6148-6153
Number of pages	6
Journal	Applied optics
Volume	45
Issue number	24
DOIs	https://doi.org/10.1364/AO.45.006148
State	Published - Aug 20 2006

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.45.006148

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title = "Shift-invariant real-time edge-enhanced VanderLugt correlator using video-rate compatible photorefractive polymer",

abstract = "We demonstrated a real-time shift-invariant VanderLugt correlator (VLC). The VLC was implemented with a 37 μm thick bis-triarylamine side-chain polymer matrix photorefractive (PR) poisoner composite operating at 532 nm wavelength. Correlation selectivity was enhanced by real-time edge enhancement. The advantage of the VLC is that its architecture allows overcoming the PR material response speed. A correlator of this type enables a fast shift-invariant search of a large optical image database. A high degree of shift invariance in our correlator was possible because of the material thickness. The angular bandwidth of this material was measured experimentally in a degenerate four-wave mixing setup, and it was found to be in a very good agreement with the theory.",

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AU - Heifetz, A.

AU - Pati, G. S.

AU - Shen, J. T.

AU - Lee, J. K.

AU - Shahriar, M. S.

AU - Phan, C.

AU - Yamamoto, M.

PY - 2006/8/20

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AB - We demonstrated a real-time shift-invariant VanderLugt correlator (VLC). The VLC was implemented with a 37 μm thick bis-triarylamine side-chain polymer matrix photorefractive (PR) poisoner composite operating at 532 nm wavelength. Correlation selectivity was enhanced by real-time edge enhancement. The advantage of the VLC is that its architecture allows overcoming the PR material response speed. A correlator of this type enables a fast shift-invariant search of a large optical image database. A high degree of shift invariance in our correlator was possible because of the material thickness. The angular bandwidth of this material was measured experimentally in a degenerate four-wave mixing setup, and it was found to be in a very good agreement with the theory.

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Shift-invariant real-time edge-enhanced VanderLugt correlator using video-rate compatible photorefractive polymer

Abstract

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