Anthony B Roberts

Address:

390 E Oakenwald St APT 401, Dallas, TX 75203

VIN:

5TEJU62N17Z406738

Make:

TOYOTA

Model:

TACOMA

Year:

2007

US Patent:

7145714, Dec 5, 2006

Filed:

Jul 26, 2004

Appl. No.:

10/898788

Inventors:

Anthony D. Roberts - Bozeman MT, US
Philip R. Battle - Bozeman MT, US

Assignee:

AdvR, Inc. - Bozeman MT

International Classification:

G02F 1/35
C30B 33/04

US Classification:

359326, 117 2

Abstract:

The manufacture of optical devices by reversing domains in specific patterns in ferroelectric crystal material is practiced using a segmented electrode rather than a continuous electrode on at least one of the surfaces of the ferroelectric crystal material. Independent poling voltages are selectively applied to the segments to create various electric fields inside the ferroelectric crystal material. In this manner, portions of the desired domain-reversed pattern are individually established in the ferroelectric crystal material in high fidelity with their respective electrode segments so that upon completion of poling, the entire domain-reversed structure is established in the ferroelectric crystal material in high fidelity relative to the entire electrode. Parameters of the electrode segment that may be varied singly or in combination to achieve a desired degree of fidelity include the overall size of the electrode segment, as well as the shape and size of the features included in the electrode segment.

US Patent:

20080179769, Jul 31, 2008

Filed:

Jan 25, 2007

Appl. No.:

11/698254

Inventors:

Anthony D. Roberts - Bozeman MT, US
Philip R. Battle - Bozeman MT, US

International Classification:

G02F 1/135

US Classification:

264 127, 359326

Abstract:

Optical devices are manufactured by aligning domains, or poled volumes, in specific patterns in a ferroelectric crystal material. The ferroelectric crystal material may be poled in a repeated pattern, using an electrode having a shaped contact area that is essentially the same as a single spatial feature of the pattern such as a line or a triangle, or with a shaped contact area that is smaller than a spatial feature of the pattern, or smaller than all of the spatial features of the pattern. These devices may be produced use a repositionable electrode on one surface of the crystal, rather than a conventional, fixed electrode. The repositionable electrode is positioned on a surface of the crystal, with an opposing electrode on the opposing surface of the ferroelectric crystal material, the ferroelectric crystal material is poled by applying a voltage profile between the electrodes, the repositionable electrode is repositioned to a new location, and the ferroelectric crystal material is poled in the new location. The procedure is repeated for as many instances of the poled feature as desired.