The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2010
Filed:
Jan. 19, 2005
Applicant:
David Ezra, Oxon, GB;
Inventor:
David Ezra, Oxon, GB;
Assignee:
DE Technologies Limited, Oxon, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical device includes an encoding surface having a micro-relief pattern () over at least part thereof designed to produce a predetermined diffracted first image when illuminated in use, and an optically anisotropic layer () such as a polymerized liquid crystal provided whereby at least part of the micro-relief pattern () induces local orientation of the optically anisotropic layer () thereby to impose a predetermined polarization modulation, thereby to produce a predetermined polarization dependent second image when illuminated in use.