Optical array comprising a beam splitter

US9941653B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• Friedrich-Schiller-Universitat Jena · DE

Inventors

• Arno Klenke · Jena, DE
• Jens Limpert · Jena, DE
• Hans-Jurgen Otto · Jena, DE
• Andreas Tunnermann · Weimar, DE

Key dates

• Filing date: Feb 3, 2015
• Grant date: Apr 10, 2018
• Expiry date: Feb 3, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/1307
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to an optical array comprising a splitting element (1) which splits an input beam (E) into at least two partial beams (T1, T2, T3, T4), at least one optical element (V1, V2, V3, V4, MV) through which at least one of the partial beams (T1, T2, T3, T4) propagates, and at least one combining element (4) which spatially superimposes the partial beams (T1, T2, T3, T4) in one output beam (A). The object of the invention is to provide an optical array which is improved over the prior art and which permits effective and simple splitting of the input light beam, in particular a laser beam with pulsed or continuous emission. The invention achieves this object in that the splitting element (1) and/or the combining element (4) each have a partially reflective element (2, 2′) which reflects the radiation of the input beam (E) or of the output beam (A) two or more times, wherein the partially reflective element (2, 2′) has zones (a, b, c, d) of different reflectivity.