Projection system for forming spatially modulated laser radiation and optical assembly for transforming the laser radiation

The invention relates to a projection system for forming spatially modulated laser radiation which comprises an optical assembly (100) for transforming laser radiation, a field lens (110), a spatial light modulator (120), and a projection assembly (130). In this case, by the optical assembly (100) along a first direction (E) incident laser radiation on an aspherically curved reflecting surface (22) along a second direction (R) is reflected, wherein the laser radiation in a plane perpendicular to the first direction (E) a nonhomogeneous beam profile (G1, G2) with a first radiation axis (a) and a direction perpendicular to the second beam axis (B), and the aspherical curvature is adapted upon reflection at the reflecting surface (22) of the inhomogeneous beam profile of the laser radiation each of the first radiation axis (a) and / or for the second radiation axis (B) in a homogeneous beam profile top-hat transform (H). The arrangement may, in particular to produce spatially modulated laser radiation from a Gaussian or approximately Gaussian beam profile of a single mode laser, wherein the known emission profile of the single mode laser by means of reflection at a curved reflecting surface in a highly compact optical assembly in any other beam profile, for example, a rectangular beam profile or a general beam profile can be transformed each with a top-hat intensity distribution and additionally collimated in the further propagation of focused or diffused.