Device for exposing thermosensitive media

摘要

An optical system for directing the radiant energy produced by a bar of high power laser emitters to a TIR spatial modulator from which selected rays are directed to a media requiring radiation of high radiant intensity comprises: (a) a plurality of laser radiation sources such as a laser bar having a plurality of emitters; (b) means for collimating at least a portion of the rays provided by the laser radiation sources; (c) first imaging means for providing a first image of the laser radiation sources; (d) means for collimating and means for focusing rays from the first image; (e) means for modulating rays from the first image; (f) second imaging means for providing a second image of the modulated rays: (g) means for separating the diffraction orders of the rays from the modulated second image to permit the passage of only zero order rays; and (h) means for imaging the zero order rays. The system may include an optical mixer in the form of a glass blade to direct the radiated rays from the emitters of the laser bar to the modulator.