Patents by Inventor Andreas Gehner

Andreas Gehner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11459229
    Abstract: An MMS includes a substrate, an element movable with respect to the substrate and a frame structure. A first pair of springs is arranged between the substrate and the frame structure along a first spring direction. A second pair of springs is arranged between the movable element and the frame structure along a second spring direction. The frame structure is configured to generate tensile stress in the second pair of springs at tensile stress acting in the first pair of springs.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: October 4, 2022
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Peter Duerr, Detlef Kunze, Andreas Gehner, Martin Friedrichs
  • Publication number: 20190345023
    Abstract: An MMS includes a substrate, an element movable with respect to the substrate and a frame structure. A first pair of springs is arranged between the substrate and the frame structure along a first spring direction. A second pair of springs is arranged between the movable element and the frame structure along a second spring direction. The frame structure is configured to generate tensile stress in the second pair of springs at tensile stress acting in the first pair of springs.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Inventors: Peter DUERR, Detlef KUNZE, Andreas GEHNER, Martin FRIEDRICHS
  • Publication number: 20180117709
    Abstract: The invention relates to a method and a device for locally defined machining on surfaces of workpieces. A laser beam (1) emitted by a laser radiation source (2) is aimed onto the reflecting surfaces of a plurality of adjacently arranged micromirrors that may be controlled individually with an electronic control and that are pivotable about at least one axis. Sub-beams (4) reflected by the reflecting surfaces of the micromirrors pivoted in a defined manner are incident and focused on the surface of a workpiece, which surface is arranged in the focal plane (6) of the focusing optics unit (5), at different adjustable positions, so that simultaneously a locally defined change in the workpiece material and/or a locally defined material removal with prespecifiable geometry is attained in a region of the workpiece near its surface.
    Type: Application
    Filed: April 27, 2016
    Publication date: May 3, 2018
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Andreas WETZIG, Udo KLOTZBACH, Michael PANZNER, Andreas GEHNER, Peter DUERR, Alexander MAI
  • Patent number: 5495280
    Abstract: An illumination device used for the direct illumination of light-sensitive ayers comprises a light source and a pattern generator.The pattern generator includes an optical Schlieren system and an active, matrix-addressable surface light generator. The Schlieren system comprises a Schlieren lens and a projection lens as well as a mirror device, which is arranged between these lenses and which directs light coming from the light source onto the surface of the surface light modulator. A filter device is used for filtering out diffracted light and for permitting undiffracted light to pass from the surface light modulator to the projection lens. The structure to be illuminated is secured in position on a displaceable positioning table. The surface light modulator is addressed such that the non-addressed surface areas thereof correspond to the projection areas of said structure which are to be illuminated.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: February 27, 1996
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Andreas Gehner, Gunther Hess, Heinz Kuck, Holger Vogt
  • Patent number: 5486851
    Abstract: An illumination device for producing models used for manufacturing electronic elements, or for direct illumination of wafers or substrates during the photolithographic steps required for their production, or for direct illumination of structures including light-sensitive layers, comprises a pulsed laser light source and a pattern generator.The pattern generator includes an optical Schlieren system and an active, matrix-addressable surface light modulator. The Schlieren system comprises a Schlieren lens arranged on a side of the surface light modulator, a projection lens facing away from the surface light modulator, and a mirror device which is arranged between the lenses for directing light coming from the light source onto the reflective surface on the surface light modulator. The Schlieren lens is arranged from the surface light modulator at a short distance relative to the focal length of the lens.
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: January 23, 1996
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Andreas Gehner, Gunther Hess, Heinz Kuck, Holger Vogt
  • Patent number: 5296891
    Abstract: The illumination device (1) proposed is designed to produce models (6), or for the direct illumination of electronic elements, and includes a light source (2) and a pattern generator (3).In order to shorten the necessary writing time or exposure time with a simplified illumination-device structure, the pattern generator (3) includes an optical schlieren system (15, 17) and an active, matrix-addressable surface light generator (13) which has a viscoelastic control layer with a reflective surface (19). Disposed between the schlieren lens (15) and the projection lens (16) in the schlieren system (14) is a mirror device (17) which preferably has two functions, not only deflecting the light from the light source (2) to the surface light modulator (13) but also filtering out undiffracted reflected light. The schlieren lens is located at a distance from the surface light modulator (13) which is short relative to the focal length of the lens.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: March 22, 1994
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Holger Vogt, Heinz Kuck, Gunther Hess, Andreas Gehner