Abstract: A plug part which is used in a releasable plug connection of light waveguides comprises a cylindrical carrier tube with an optical fiber being centrally fixed therein and has a planar processed end surface extending perpendicular to an axis of the tube. The end face of the optical fiber is set back by a defined amount relative to an end surface of the carrier tube. The set back is produced either by a cross-groove or a depression in the end of the tube with the depth corresponding to the defined amount.

Abstract: An optical component element which may be either used as an optical storage medium or as a component in an optical system characterized by a plurality of sub-holograms which will randomly divide a beam of coherent radiation in a plurality of partial beams with each of the sub-holograms producing a single partial beam. Each of the sub-holograms may be constructed so that the partial beam produced thereby exhibits a specific spatial configuration at specific locations in space with the spatial configurations being either focal points, focal lines, circular rings or sectors of a circle. Each of the sub-holograms may have a different area so that the partial beam formed thereby has a varying energy content. Preferably, the sub-holograms are constructed as sectors of a circle.