Joint Transform Optical Correlator Designed and Analyzed by Use of Two- and One-Dimensional Hilbert Transforms
Applied Optics, Vol. 40, Issue 5, pp. 662-671 (2001)
http://dx.doi.org/10.1364/AO.40.000662
Acrobat PDF (305 KB)
Abstract
Novel real-time joint transform, Hilbert transform optical correlators are proposed in which only a half or a quarter of the Fourier plane is written onto an optically addressable spatial light modulator. A point source is used to recover the result for the whole plane. As a result, images with a two- or four-times larger space–bandwidth product can be matched in amplitude and phase. The effect of truncating the transform plane is explained with two- and one-dimensional Hilbert transform analysis. Results of computer simulation are shown.
© 2001 Optical Society of America
OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.4550) Fourier optics and signal processing : Correlators
(070.5010) Fourier optics and signal processing : Pattern recognition
(100.1160) Image processing : Analog optical image processing
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(200.4740) Optics in computing : Optical processing
Citation
Alastair D. McAulay, "Joint Transform Optical Correlator Designed and Analyzed by Use of Two- and One-Dimensional Hilbert Transforms," Appl. Opt. 40, 662-671 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-5-662
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