Patents by Inventor Frank-Thomas Lentes

Frank-Thomas Lentes 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).

  • Publication number: 20210096376
    Abstract: The present disclosure relates to a device, in particular an augmented reality device. In particular, the disclosure relates to a device, a kit, a process for making the device, and a process for making a visual impression. The present disclosure relates to a device including: a. a grouping of x optical elements, each optical element having a front face and a back face, the x optical elements being arranged in a stack from first to last in which the front face of an optical element faces the back face of the next optical element, and b. a spacer region made of a material having a refractive index below 1.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 1, 2021
    Applicant: SCHOTT AG
    Inventors: Simone Monika Ritter, Antoine Carré, Peter Naß, Frank-Thomas Lentes
  • Publication number: 20210025984
    Abstract: The disclosure relates to a glass window for optical systems, in particular for LiDAR systems, in which the glass window has a curved form. For length scales between 0.1 mm and 15 mm, at least 50% of the area of the glass window has a geometrical slope error SEG for which the following is true: SEG<?2.3·10?6·2·R0[1/mm]+7.3·10?4.
    Type: Application
    Filed: July 22, 2020
    Publication date: January 28, 2021
    Inventors: Nikolaus Schultz, Boris Eichhorn, Frank-Thomas Lentes, Jens Ulrich Thomas, Volker Plapper
  • Publication number: 20200407263
    Abstract: A method for the production of glass or glass ceramic elements from flat glass or glass ceramic parts is provided where the edges of the glass or glass ceramic elements are treated by a combination of two processes. The flat glass or glass ceramic element with an edge surface connecting the two side surfaces is produced. The edge surface has at least one first elongated, strip-shaped edge region and at least one second elongated strip-shaped edge region, which are formed by a ground edge. The edge regions extend in the longitudinal direction along the edge surface and along the side surfaces. The first edge region has elongated parallel filamentary damages that are parallel and adjacent to one another and, in particular, spaced apart equidistantly, in the longitudinal direction thereof extending transversely to the side surfaces and along the surface of the first edge region.
    Type: Application
    Filed: September 15, 2020
    Publication date: December 31, 2020
    Applicant: SCHOTT AG
    Inventors: Volker PLAPPER, Fabian WAGNER, Andreas ORTNER, Albrecht SEIDL, Frank-Thomas LENTES
  • Publication number: 20200376603
    Abstract: A method for preparing a workpiece for separation is provided that includes providing a workpiece that is transparent for light of a pulsed laser beam, splitting the laser beam into two partial beams using an optical system, directing both partial beams onto the workpiece, and moving the workpiece and the partial beams relative to one another. The partial beams are directed onto the workpiece incident at different angles to the normal of the irradiated surface and superimposed inside the workpiece such that the partial beams interfere with one another to form a sequence of intensity maxima inside the workpiece. The intensity at the intensity maxima is sufficiently high to modify the material of the workpiece so that a chain-like periodic pattern of material modifications is formed along a path defining a separation line.
    Type: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Applicant: SCHOTT AG
    Inventors: Andreas ORTNER, Clemens KUNISCH, Frank-Thomas LENTES, Jens Ulrich THOMAS, Kurt NATTERMANN, Michael KLUGE
  • Publication number: 20200369551
    Abstract: A method for processing glass elements is provided. The method includes introducing a perforation line for parting a glass element introduced into the glass element during or after a hot processing process at an elevated temperature of at least 100° C. Spaced-apart filamentary flaws are introduced into the glass element along the predetermined course of the perforation line by a pulsed laser beam of an ultrashort pulse laser, and, during or after the introduction of the filamentary flaws, the glass element is cooled down so as to produce a temperature gradient, which induces a mechanical stress at the filamentary flaws, whereby the breaking force required for parting the glass element along the perforation line is reduced.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: SCHOTT AG
    Inventors: Andreas Ortner, Ulla Trinks, Fabian Wagner, Carsten Etz, Daniela Seiler, Michael Kluge, Peter Czepelka, Frank-Thomas Lentes, André Witzmann, Reiner Artmann
  • Patent number: 10807902
    Abstract: A method for the production of glass or glass ceramic elements from flat glass or glass ceramic parts is provided where the edges of the glass or glass ceramic elements are treated by a combination of two processes. The flat glass or glass ceramic element with an edge surface connecting the two side surfaces is produced. The edge surface has at least one first elongated, strip-shaped edge region and at least one second elongated strip-shaped edge region, which are formed by a ground edge. The edge regions extend in the longitudinal direction along the edge surface and along the side surfaces. The first edge region has elongated parallel filamentary damages that are parallel and adjacent to one another and, in particular, spaced apart equidistantly, in the longitudinal direction thereof extending transversely to the side surfaces and along the surface of the first edge region.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: October 20, 2020
    Assignee: SCHOTT AG
    Inventors: Volker Plapper, Fabian Wagner, Andreas Ortner, Albrecht Seidl, Frank-Thomas Lentes
  • Publication number: 20200290152
    Abstract: A method provides for producing modifications in or on a transparent workpiece using a laser processing device. The laser processing device has a short pulse or ultrashort pulse laser that emits laser radiation having a wavelength in the transparency range of the workpiece and which has a beam-shaping optical unit for beam shaping for focusing the laser radiation. The transparent workpiece is composed of a material that has a plurality of phases, of which at least two phases have different dielectric constants, of which in turn the one phase is a phase embedded in the form of particles, which phase is substantially surrounded by the other phase, and wherein the product of the volume of the particles specified in cubic nanometers and the ratio of the absolute value of the difference of the two different dielectric constants to the dielectric constant of the surrounding phase is greater than 500.
    Type: Application
    Filed: June 2, 2020
    Publication date: September 17, 2020
    Applicant: Schott AG
    Inventors: Andreas Ortner, Niklas Bisch, Fabian Wagner, Albrecht Seidl, Frank-Thomas Lentes
  • Patent number: 10702948
    Abstract: A method provides for producing modifications in or on a transparent workpiece using a laser processing device. The laser processing device has a short pulse or ultrashort pulse laser that emits laser radiation having a wavelength in the transparency range of the workpiece and which has a beam-shaping optical unit for beam shaping for focusing the laser radiation. The transparent workpiece is composed of a material that has a plurality of phases, of which at least two phases have different dielectric constants, of which in turn the one phase is a phase embedded in the form of particles, which phase is substantially surrounded by the other phase, and wherein the product of the volume of the particles specified in cubic nanometers and the ratio of the absolute value of the difference of the two different dielectric constants to the dielectric constant of the surrounding phase is greater than 500.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: July 7, 2020
    Assignee: Schott AG
    Inventors: Andreas Ortner, Niklas Bisch, Fabian Wagner, Albrecht Seidl, Frank-Thomas Lentes
  • Publication number: 20200199007
    Abstract: A method is provided that includes producing filamentary damages in a volume of a glass or glass ceramic element adjacently aligned along a separation line and extend obliquely relative to a surface of the glass or glass ceramic element; and separating a portion from the glass or glass ceramic element along the separation line. The step of producing the filamentary damages includes directing laser pulses of an ultrashort pulse laser obliquely on the surface so that the laser pulses have a light propagation direction that extends obliquely relative to the surface and so that the filamentary damages resulting from the laser pulses have the longitudinal extension that extends obliquely relative to the surface; generating a plasma within the volume with the laser pulses; and displacing the laser pulses at points of incidence over the surface along the separation line.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Applicant: SCHOTT AG
    Inventors: Andreas ORTNER, Albrecht SEIDL, Frank-Thomas LENTES, Fabian WAGNER
  • Publication number: 20200101561
    Abstract: Devices and methods for processing a workpiece along a predetermined processing line are provided. The device includes: a pulsed, polychromatic laser beam generator; an optical arrangement; and a moving device. The laser beam generator generates a laser beam along a beam direction. The optical arrangement generates a focal line along the beam direction. The optical arrangement has a chromatic aberration for wavelength-dependent focusing of the laser beam and a filter for wavelength-dependent filtering of the laser beam. The moving device generates relative movement between the laser beam and the workpiece along the predetermined processing line.
    Type: Application
    Filed: November 18, 2019
    Publication date: April 2, 2020
    Applicant: SCHOTT AG
    Inventors: Andreas ORTNER, Fabian WAGNER, Albrecht SEIDL, Simon SCHMITT, Frank-Thomas LENTES, Jens Ulrich THOMAS
  • Publication number: 20190322564
    Abstract: A method for separating a substrate of a brittle-hard material is provided. The method includes the steps of introducing defects into the substrate at a spacing from one another along a separation line using at least one pulsed laser beam; selecting an average spacing between neighboring defects and a number of laser pulses for generating a respective defect such that a breaking stress (?B) for separating the substrate along the separation line is smaller than a first reference stress (?R1) of the substrate and such that an edge strength ?K of the separation edge obtained after separation is greater than a second reference stress (?R2) of the substrate; and separating the substrate after introducing the defects by applying a stress along the separation line.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 24, 2019
    Applicant: SCHOTT AG
    Inventors: Fabian WAGNER, Volker PLAPPER, Andreas ORTNER, Simon SCHMITT, Frank-Thomas LENTES, Albrecht SEIDL, Antal MAKACS, Patrick BARTHOLOME
  • Publication number: 20190308899
    Abstract: The present invention relates generally to a process for producing glass products and to an apparatus suitable for the purpose. In the process, a melting apparatus is provided with a melting tank for producing a glass melt from glass raw materials and a top furnace. Part of the surface of the melting region of the melting apparatus is covered with the glass raw materials and at least a small portion of the surface of the melting region is uncovered. In addition, energy is introduced in such a way that a vertical temperature difference can be established, such that the temperature of the glass melt at the base is greater than the temperature of the atmosphere in the top furnace.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 10, 2019
    Applicant: Schott AG
    Inventors: Stefan Schmitt, Wolfgang Schmidbauer, Christian Müller, Frank-Thomas Lentes, Michael Hahn, Reinhard Männl, Hildegard Römer, Karin Naumann
  • Publication number: 20190210909
    Abstract: A method and apparatus for producing glass products from tubular glass precursors is provided. In particular, a method and apparatus for separating tube glass into sized glass tube portions, produced glass tube portions, glass precursor portions, or glass product portions, and their use as pharmaceutical packaging are provided. The tube glass or the glass precursor or the glass product is provided with filaments along predetermined breaking planes. The filaments extend obliquely to the local wall radius and allow for clean separation of the tube glass or the glass precursor or the glass product.
    Type: Application
    Filed: January 9, 2019
    Publication date: July 11, 2019
    Applicant: SCHOTT AG
    Inventors: Fabian WAGNER, Michael KLUGE, Andreas ORTNER, Laura BRUECKBAUER, Frank-Thomas LENTES
  • Publication number: 20180370840
    Abstract: A method for the production of glass or glass ceramic elements from flat glass or glass ceramic parts is provided where the edges of the glass or glass ceramic elements are treated by a combination of two processes. The flat glass or glass ceramic element with an edge surface connecting the two side surfaces is produced. The edge surface has at least one first elongated, strip-shaped edge region and at least one second elongated strip-shaped edge region, which are formed by a ground edge. The edge regions extend in the longitudinal direction along the edge surface and along the side surfaces. The first edge region has elongated parallel filamentary damages that are parallel and adjacent to one another and, in particular, spaced apart equidistantly, in the longitudinal direction thereof extending transversely to the side surfaces and along the surface of the first edge region.
    Type: Application
    Filed: August 17, 2018
    Publication date: December 27, 2018
    Applicant: SCHOTT AG
    Inventors: Volker PLAPPER, Fabian WAGNER, Andreas ORTNER, Albrecht SEIDL, Frank-Thomas LENTES
  • Publication number: 20180221991
    Abstract: A method for filamentation of a dielectric workpiece has a workpiece with a thickness between 0.5 and 20 mm is provided. The workpiece has boundary surfaces delimiting the workpiece. The thickness of the workpiece varies spatially and/or at least one of the boundary surfaces delimiting the workpiece has at least one curvature with a radius of curvature between 0.1 ?m and 10 m. The dielectric workpiece can have a specially formed edge.
    Type: Application
    Filed: April 5, 2018
    Publication date: August 9, 2018
    Applicant: SCHOTT AG
    Inventors: Andreas ORTNER, Albrecht SEIDL, Frank-Thomas LENTES, Fabian WAGNER
  • Publication number: 20180215647
    Abstract: A plate-like glass element including a pair of opposite side faces and at least one channel introduced into the glass of the glass element. The at least one channel joins the side faces and opens into the side faces. The at least one channel has a rounded wall and a transverse dimension of less than 100 ?m. The at least one channel extends in a longitudinal direction that runs transverse to the side faces. The rounded wall of the at least one channel has a plurality of rounded, substantially hemispherical depressions.
    Type: Application
    Filed: January 29, 2018
    Publication date: August 2, 2018
    Applicant: Schott AG
    Inventors: Andreas Ortner, Andreas Roters, Frank-Thomas Lentes, Lutz Parthier, Markus Heiß-Choquet, Ulrich Peuchert, Fabian Wagner, Florian Resch, Laura Brückbauer, Matthias Jotz, Vanessa Hiller
  • Publication number: 20180134606
    Abstract: A method for separating a portion from a sheet glass element having a thickness of at least 2 millimeters along an intended separation line that divides the sheet glass element into the portion and a remaining main part is provided. The method includes producing filamentary damages comprising sub-micrometer hollow channels in a volume of the glass sheet element adjacently aligned along the separation line; and heating and/or cooling the glass sheet element to cause expansion and/or contraction so that the portion detaches from the main part along the separation line. The portion and the remaining main part each remain intact as a whole. The step of producing the filamentary damages includes generating a plasma within the volume with laser pulses of an ultrashort pulse laser; and displacing points of incidence of the laser pulses over a surface of the glass sheet element along the separation line.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Applicant: SCHOTT AG
    Inventors: Fabian WAGNER, Andreas ORTNER, Albrecht SEIDL, Frank-Thomas LENTES, Jörn GERBAN, Simon SCHMITT
  • Publication number: 20180134604
    Abstract: A method is provided that includes producing filamentary damages in a volume of a glass or glass ceramic element adjacently aligned along a separation line and extend obliquely relative to a surface of the glass or glass ceramic element; and separating a portion from the glass or glass ceramic element along the separation line. The step of producing the filamentary damages includes directing laser pulses of an ultrashort pulse laser obliquely on the surface so that the laser pulses have a light propagation direction that extends obliquely relative to the surface and so that the filamentary damages resulting from the laser pulses have the longitudinal extension that extends obliquely relative to the surface; generating a plasma within the volume with the laser pulses; and displacing the laser pulses at points of incidence over the surface along the separation line.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Applicant: SCHOTT AG
    Inventors: Andreas ORTNER, Albrecht SEIDL, Frank-Thomas LENTES, Fabian WAGNER
  • Publication number: 20180117708
    Abstract: A method provides for producing modifications in or on a transparent workpiece using a laser processing device. The laser processing device has a short pulse or ultrashort pulse laser that emits laser radiation having a wavelength in the transparency range of the workpiece and which has a beam-shaping optical unit for beam shaping for focusing the laser radiation. The transparent workpiece is composed of a material that has a plurality of phases, of which at least two phases have different dielectric constants, of which in turn the one phase is a phase embedded in the form of particles, which phase is substantially surrounded by the other phase, and wherein the product of the volume of the particles specified in cubic nanometers and the ratio of the absolute value of the difference of the two different dielectric constants to the dielectric constant of the surrounding phase is greater than 500.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Applicant: Schott AG
    Inventors: Andreas Ortner, Niklas Bisch, Fabian Wagner, Albrecht Seidl, Frank-Thomas Lentes
  • Patent number: 9676643
    Abstract: A method for producing bubble-free glasses is provided, in which a glass mixture that is arsenic-free, antimony-free and tin-free with the exception of any unavoidable raw material impurities and at least one sulfate compound as a refining agent are used. The glass mixture and refining agent are melted and primarily refined in a first region of a melting tank, an average melting temperature (T1) is set at T1>1580° C. and an average melt residence time (t1) is set at t1>2 hours. A secondary refinement is carried out in a second region, an average melting temperature (T2) is set at T2>1660° C. and an average melt residence time (t2) is set at t2>1 hour, and the proportion of the SO3 resulting from decomposition of the sulfate is reduced to less than 0.002 wt. %.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: June 13, 2017
    Assignee: SCHOTT AG
    Inventors: Frank-Thomas Lentes, Karin Naumann, Ulrich Schiffner, Friedrich Siebers, Christian Mueller, Klaus Schoenberger, Evelin Weiss