Fast optical thresholding with an array of optical thyristor differential pairs

Authors
Buczynski, R Ortega, R Szoplik, T Vounckx, R Heremans, P Veretennicoff, I Thienpont, H
Citation
R. Buczynski et al., Fast optical thresholding with an array of optical thyristor differential pairs, J OPT A-P A, 1(2), 1999, pp. 276-279
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
ISSN journal
14644258 → ACNP
Volume
1
Issue
2
Year of publication
1999
Pages
276 - 279
Database
ISI
SICI code
1464-4258(199903)1:2<276:FOTWAA>2.0.ZU;2-Y
Abstract
In this paper an optoelectronic system for fast grey-level image decomposit ion into binary slices is presented. To perform thresholding we take advant age of the differential nature of optical thyristors and compare the light level of the image pixels with that of a reference intensity. For the input a grey-level image was generated using a liquid crystal spatial light modu lator (SLM) and, for the reference intensity, a vertical-cavity surface-emi tting laser light source combined with a diffractive fan-out element was us ed. A decomposition frame rate of 1.0 kHz has been obtained for images with five grey levels.