Patent ID: 9010965
Filing Date: 2015-04-21
Classification: G02B

Abstract:
1. A system providing laser illumination having reduced or zero speckle comprising: a plurality of laser sources each providing laser illumination; optics for combining the laser illumination into output illumination; and means for time-multiplexing the operation of the laser sources to provide said output illumination have reduced or zero speckle, wherein said optics comprises one or more optical elements for combining the laser illumination of two different ones of said laser sources each along a first path for inclusion in said output illumination, one or more optical feedback devices in which each of said one or more optical feedback devices optically feeds back light from at least one of said one or more optical elements along a second path different from said first path of the optical element in a direction back to the optical element, in which said optical feedback device is movable to induce one of time-dependent modulation of the temporal modal structure, coherent collapse mode, coherent collapse mode, or swept-frequency mode, in said laser illumination of said two different ones of said laser sources which were combined by said optical element.