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AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsRolf Goering, Peter Schreiber, Torsten Possner
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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).
Optical assembly for symmetrizing the radiation of a plurality of laser diodes arranged adjacent to each other in the y-direction in fixed coordination, which radiate in the z-direction and whose radiation in the x-z and y-z planes is asymmetrical, a cylindrical lens system being mounted behind the laser diodes, wherein the cylindrical lens system is arranged tilted about the optical axis (z-axis) which is perpendicular to the x-y plane and collimates the output beams of the individual laser diodes in the x-direction and shifts them relative to each other and separates them in the process, in that behind the cylindrical lens system is mounted a first deflection element which deflects the beams of the individual laser diodes in the y-direction with different angles of deflection such that at a predetermined distance the centroids of the individual beams coincide, and in that a distance behind the first deflection element is arranged a second deflection element which recompensates the different angles of deflection of the beams relative to the optical axis (z-axis).
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