Share Email Print
cover

Proceedings Paper

Real-time objects recognition by the photoanisotropic copies
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The method of object recognition is described by the example of objects of amplitude transparent type. The method is to obtain a photoanisotropic copy of object images on the polarization-sensitive material. At consequent illumination of the photoanisotropic copy with a parallel circularly polarized beam of nonactinic light, the transmitted light becomes elliptically polarized. It is shown that the characteristics of the summary polarization ellipse in the Fraunhofer diffraction region uniquely identify the given object. The real time determination of the characteristics of the summary polarization ellipse is made by means of diffraction gratings of anisotropic profile and by comparison of these characteristics with etalon from database.

Paper Details

Date Published: 8 October 2007
PDF: 9 pages
Proc. SPIE 6741, Optics and Photonics for Counterterrorism and Crime Fighting III, 67410B (8 October 2007); doi: 10.1117/12.737588
Show Author Affiliations
Barbara Kilosanidze, Institute of Cybernetics (Georgia)
George Kakauridze, Institute of Cybernetics (Georgia)


Published in SPIE Proceedings Vol. 6741:
Optics and Photonics for Counterterrorism and Crime Fighting III
Colin Lewis, Editor(s)

© SPIE. Terms of Use
Back to Top