Laser light source and laser projector with optical devices for reducing speckle noise and method for operating such a laser light source and such a laser projector

摘要

The invention relates to a laser light source (1a) for generating a laser beam (2), in particular for speckle-free imaging and / or projection, with at least two, preferably with three different wavelengths (λ _R , λ _G , λ _B ), comprising: at least two optical Devices, in particular at least two optical parametric oscillators (5a-c) each having a non-linear optical medium (6a-c) for generating in each case a signal beam (S1, S2, S3) and an idler beam (I1, I2, I3) and an overlay device (4) which is designed to generate the laser beam (2) with the at least two wavelengths (λ _R , λ _G , λ _B ) in each case either the signal beam (S1, S2, S3) or the Idler beam (I1, I2, I3) of the at least two optical devices (5a-c) to be superimposed. The invention also relates to a laser projector for generating a particular speckle-free image on a projection surface having such a laser light source (1 a).