Please use this identifier to cite or link to this item: http://dx.doi.org/10.18419/opus-4369
Authors: Schönleber, Martin
Tiziani, Hans J.
Title: Spatial light modulator used for the Fourier transformation of video images
Issue Date: 1993
metadata.ubs.publikation.typ: Zeitschriftenartikel
metadata.ubs.publikation.source: Journal of modern optics 40 (1993), S. 2039-2052. URL http://dx.doi.org./10.1080/09500349314552031
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-61964
http://elib.uni-stuttgart.de/handle/11682/4386
http://dx.doi.org/10.18419/opus-4369
Abstract: Coherent-optical Fourier transformation of video images can be very powerful; a set-up will be described. The modulation of the coherent beam occurs in a spatial light modulator where the liquid crystal display image of the object is projected onto an optically addressed spatial light modulator that uses bismuth silicium oxide for photoconduction and a twisted nematic liquid crystal as a birefringent layer. Edge enhancing of the image can occur; in addition, it appears that the Fourier spectrum of an edge is asymmetric due to local phase variations. The set-up was applied to recognize objects at different positions. A charge-coupled device matrix camera detects the Fourier plane, in the personal computer the pixels are summed up to ring-wedge-segments and processed for pattern recognition.
Appears in Collections:07 Fakultät Konstruktions-, Produktions- und Fahrzeugtechnik

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