Abstract: In a method for influencing and measuring pulsed electromagnetic illumination, e.g. parallel laser light (L), said illumination or light can be spatially divided, in particular, in an autocorrelator comprising a beam receptor (12), can be recombined behind said beam receptor by a superposition or focusing device (18 or 58) and can be detected in the recombinant area by a detector (20). As the transmission system (52), the beam receptor comprises beam profile dividers in a penetrable housing (50), in the form of at least two transmission parts (54; 56), with or in which separate, preferably parallel component beams (S, T) can be modified in their time-based beam characteristics, before being recombined.

Abstract: What is described here is a system for as well as a method of geometric beam shaping of the beam profile of a light beam, comprising a first prism and a second prism optically transparent to the light beam, which prisms are so disposed in the optical path of he light beam in such a way that after the passage of the light beam through both prisms the beam profile of the light beam may be expanded or reduced in a direction orthogonal on its direction of propagation by a first factor, and by a second factor different from the first factor in a direction orthogonal on the first direction.