Optical array for symmetrization of laser diode beams

US6151168A · kind A · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Rolf Goering · Jena, DE
• Peter Schreiber · Jena, DE
• Torsten Possner · Jena, DE

Key dates

• Filing date: Jun 21, 1999
• Grant date: Nov 21, 2000
• Expiry date: Jun 21, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/005
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to an optical array for symmetrization of the beam of multiple sequentially fixed adjacent laser diodes, their respective output radiation being asymmetrical in relation to a first and a second direction that are perpendicular to each other. A cylindrical lens with sufficient isoplanacy is mounted on the tilted optical axis (z axis), which is perpendicular to the plane predetermined by the two directions (x, y). The lens collimates and displaces the output beam bundle of the individual laser diodes in the first direction (x). The cylindrical lens is mounted downstream a directional element that deflects the beam bundle of the individual laser diodes in the second direction (y) with different deflecting angles respectively in such a way that the centers of gravity of the individual beam bundles converge at a predetermined spacing. A redirection element is mounted in the spacing behind the directional element which compensates the different deflection angles of the beam bundle to the optical axis (z axis).