System and methods for speckle reduction

Details System and methods for speckle reduction System and methods for speckle reduction

2011-06-28

2011-06-28

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular operating compensation means

C372S024000, C372S029020

Reexamination Certificate

active

07970028

ABSTRACT:
A method of operating a laser source comprising is provided. The method reduces speckle contrast in a projected image by creating a plurality of statistically independent speckle patterns. The method comprises generating a plurality of sub-beams that define an optical mode. The method further comprises controlling the phase of selected sub-beams to continuously sequence the laser source through a plurality of orthogonal optical modes. The plurality of orthogonal modes create a corresponding number of statistically independent speckle patterns, thus reducing speckle contrast in a image projected using the laser source by time averaging.

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