Patents by Inventor Ralf Steinkopf

Ralf Steinkopf 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).

  • Arrangement for producing a Bessel beam
    Patent number: 11372254
    Abstract: The invention relates to an arrangement for producing a Bessel beam (5), comprising a beam-forming element (2), which transforms a beam (1) incident as a plane electromagnetic wave into a Bessel beam (5). According to the invention, the beam-forming element (2) comprises at least one annular lens (3, 3?) and a Fourier optical unit, e.g. in the form of a Fourier lens (4).
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: June 28, 2022
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forchung E.V.
    Inventors: Ralf Steinkopf, Stefan Nolte, Christian Vetter, Alexander Szameit, Herbert Gross, Marco Ornigotti
  • Arrangement for Producing a Bessel Beam
    Publication number: 20200333611
    Abstract: The invention relates to an arrangement for producing a Bessel beam (5), comprising a beam-forming element (2), which transforms a beam (1) incident as a plane electromagnetic wave into a Bessel beam (5). According to the invention, the beam-forming element (2) comprises at least one annular lens (3, 3?) and a Fourier optical unit, e.g. in the form of a Fourier lens (4).
    Type: Application
    Filed: June 22, 2017
    Publication date: October 22, 2020
    Applicants: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität Jena
    Inventors: Ralf Steinkopf, Stefan Nolte, Christian Vetter, Alexander Szameit, Herbert Gross, Marco Ornigotti
  • Method for producing an optical assembly having at least two optical functional surfaces, an optical device and unit for carrying out the method
    Patent number: 9296161
    Abstract: The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: March 29, 2016
    Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität Jena
    Inventors: Sebastian Scheiding, Stefan Risse, Andreas Gebhardt, Christoph Damm, Thomas Peschel, Ralf Steinkopf
  • METHOD FOR PRODUCING AN OPTICAL ASSEMBLY HAVING AT LEAST TWO OPTICAL FUNCTIONAL SURFACES, AN OPTICAL DEVICE AND UNIT FOR CARRYING OUT THE METHOD
    Publication number: 20120236400
    Abstract: The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.
    Type: Application
    Filed: September 13, 2010
    Publication date: September 20, 2012
    Applicant: Friedrich-Schiller-Universitat Jena
    Inventors: Sebastian Scheiding, Stefan Risse, Andreas Gebhardt, Christoph Damm, Thomas Peschel, Ralf Steinkopf