Patent · US Active

Laser illumination device

US8565560B2 · kind B2 · utility

107Cited by

5References

20Claims

0Family size

Assignee

SBG Labs, Inc. · US

Inventors

Milan Momcilo Popovich · Leicester, GB
Jonathan David Waldern · Diablo, US
John James Storey · Dartmouth, GB

Key dates

Filing date	Jul 16, 2012
Grant date	Oct 22, 2013
Priority date	—
Expiry date	Jul 16, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/62
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.