LASER PROJECTOR WITH REDUCED SPECKLE EFFECT

摘要

A system is presented for use in an imaging system defining an imaging surface onto which sequentially acquired images are projected. The system comprises: a spatial light modulator (SLM) for receiving input linearly polarized light, and producing output polarized light modulated to have a spatial pattern corresponding to an image to be projected onto the imaging surface; and a de-speckling unit for processing said output polarized light while propagating towards the imaging surface to reduce speckle effect in the image as viewed on the imaging surface, the de-speckling unit comprising a polarization rotator assembly configured and operable to alternate polarization state of said output light between different polarization states with a predetermine rate.