Optical system for forming a laser beam and laser system with such an optical system

摘要

The optical system (2) has optical element including a lateral surface (15) which is formed as a reflection surface for the laser beam (6). The lateral surface propagates the laser beam, and transforms into annular laser beam (18) extending in propagation plane (19). An optical element is provided for beam shaping of the annular laser beam so that the annular laser beam exists in a plane parallel to the propagation plane of laser beam. An independent claim is included for laser system.