ROBERT L RAMSEY
Electrician at Bandelier Trl, Fort Worth, TX
License number
Texas 150384
Expiration Date
Nov 5, 2016
Category
Apprentice Electrician
Address
Address
8312 Bandelier Trl, Fort Worth, TX 76137
Phone
(817) 691-8824
Professional information
Switchable Holographic Gratings
US Patent:
7625674, Dec 1, 2009
Filed:
Oct 4, 2004
Appl. No.:
10/958669
Inventors:
Suresh C. Sharma - Arlington TX, US
Robert A. Ramsey - Fort Worth TX, US
Robert A. Ramsey - Fort Worth TX, US
Assignee:
Board of Regents, The University of Texas System - Austin TX
International Classification:
G03H 1/02
US Classification:
430 2, 430 1, 4302801, 430945, 359 3, 359 35
Abstract:
The present invention includes systems and compositions of holographic grating structures devices and methods for fabricating such holographic grating structures. The method comprises the steps of preparing a composite mixture comprising a polymerizable matrix, a liquid crystal, and a photo-oxidant dye, producing an interference pattern from two interference beams, wherein the two interference beams originate from a recording laser beam directed by a low energy laser, and projecting the interference pattern on the composite mixture to form a holographic grating structure. As described, the holographic grating structure yields a first-order diffraction efficiency of at least about 30% diffraction efficiency which may be adjusted by the application of an electric field.