Optical system for projecting a line of illumination from an array of lasers

摘要

An optical system is disclosed for projecting a line of laser illumination. The optical system includes a plurality of laser diodes arranged in a linear array, a first anamorphic lens structure (20) that at least substantially collimates a fast axis of illumination from the plurality of laser diodes, a second anamorphic lens structure (24) that scales the fast axis illumination from the first anamorphic lens structure, and a diffuser (26) which diffuses the light along the slow axis. The system also comprises a field lens for condensing the expanded and diffused beams onto a spatial light modulator of a display.The system can also contain a waveplate (22) between the anamorphic lens structures.