METHOD AND DEVICE FOR REDUCING SPECKLE IN AN OPTICAL SYSTEM

摘要

The invention relates to a method and device for reducing speckle in an optical system by decreasing the spatial coherence of a bundle of light beams. According to the invention, a bundle of light beams is reflected by at least two reflective surfaces each having a phase-shifting microstructuring via which the bundle of light beams (B) is split into partial bundles of beams (B') whose optical paths differ by more than the temporal coherence length. This enables the reduction of speckle while maintaining, to the greatest possible extent, the luminous intensity of the bundle of light beams.