Laser illumination device
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United States of America Patent
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Jan 24, 2023
Grant Date -
Nov 5, 2020
app pub date -
Jul 17, 2020
filing date -
Jul 26, 2007
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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.
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