Abstract: An optical beam-dividing device divides an optical beam into first and second sub-beams. A first prism has an entry face for an optical beam incident thereon. A first exit face is provided at which the first sub-beam exits. A second prism is provided adjoining the first prism at a first optical beam splitter. The second prism has a second exit face at which the second sub-beam exits. A third prism adjoins the second prism at a second optical beam splitter. The third prism has a reflection face opposite the second splitter. The second exit face has a third optical beam splitter thereat. The reflection face has a mirror aligned substantially perpendicular relative to the optical axis and has a circular-to-linear optical beam converter thereat.

Abstract: An apparatus for deflecting an optical beam is designed as a prism and has an entry face as well as two reflection faces and two exit faces. The prism is essentially symmetrically constructed with reference to a rotational axis. The entry face is oriented essentially perpendicularly relative to the rotational axis. Those sides of the prism facing away from the entry face are designed as reflection faces having an inclination relative to the rotational axis, these reflection faces adjoining one another in the region of the rotational axis. Those sides of the prism facing away from the rotational axis are designed as exit faces which adjoin the entry face and the respective reflection face and, proceeding from the entry face, extend with increasing distance from the rotational axis.