All-optical image processing by means of a photosensitive nonlinear liquid-crystal film: edge enhancement and image addition-subtraction

Authors
Shih, MY Shishido, A Khoo, IC
Citation
My. Shih et al., All-optical image processing by means of a photosensitive nonlinear liquid-crystal film: edge enhancement and image addition-subtraction, OPTICS LETT, 26(15), 2001, pp. 1140-1142
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
01469592 → ACNP
Volume
26
Issue
15
Year of publication
2001
Pages
1140 - 1142
Database
ISI
SICI code
0146-9592(20010801)26:15<1140:AIPBMO>2.0.ZU;2-I
Abstract
We demonstrate two simple yet efficient all-optical image-processing techni ques that use nonlinear photosensitive dye-doped nematic liquid-crystal fil ms, namely, edge enhancement and image addition-subtraction operations. The se films require no external bias and function at much lower optical powers and shorter response times than other conventional methods. (C) 2001 Optic al Society of America.