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:
Jan. 29, 2008
Filed:
Apr. 06, 2006
Leonid B Glebov, Orlando, FL (US);
Vasile Rotar, Orlando, FL (US);
Vadim I Smirnov, Orlando, FL (US);
Sarik Nersisyan, Winter Park, FL (US);
Nelson Tabirian, Winter Park, FL (US);
Leonid B Glebov, Orlando, FL (US);
Vasile Rotar, Orlando, FL (US);
Vadim I Smirnov, Orlando, FL (US);
Sarik Nersisyan, Winter Park, FL (US);
Nelson Tabirian, Winter Park, FL (US);
University of Central Florida Research Foundation, Orlando, FL (US);
Abstract
Non-mechanical optical beam steering and switching is produced by optically controlled liquid crystal spatial light modulator with angular magnification by high efficiency volume Bragg gratings recorded in a photosensitive PTR glass. Small angle beam deflection in a photoactive liquid crystal cell is produced by exposing it to a controlling beam from an external source of radiation with predetermined distribution of power density which causes predetermined spatial gradients of a refractive index in a liquid crystal cell and, therefore, refraction of a controlled beam which is made to propagate in the region with spatial gradient of the refractive index. Large angle beam deflection is produced by a volume Bragg grating with angular selectivity adjusted in such way that small angle scanning produced by optically controlled liquid crystal spatial light modulator results in change of diffraction efficiency from zero to 100% for switching the beam for two Bragg angles.