Patents by Inventor Jens Ulrich Thomas

Jens Ulrich Thomas 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: 20210149090
    Abstract: The present disclosure relates to a layered optical composite, in particular for use in an augmented reality device. In particular, the disclosure relates to a layered optical composite and a process for its preparation, a device comprising the layered optical composite and a process for its preparation, and the use of a layered optical composite in an augmented reality device. The present disclosure relates to a layered optical composite comprising: a. a substrate having a front face and a back face, b. a coating comprising: i. a type T layer, and ii. a type C region comprising one or more type C layers; in which the substrate has: i. a thickness tG in the range from 0.2 to 1.2 mm; ii. a refractive index nG at a wavelength ? in the range from 1.6 to 2.4; and iii. an optical absorption coefficient KG at the wavelength ? of less than 10 cm?1; in which the type C layers individually and independently have: i. a thickness tC in the range from 9 to 250 nm; ii.
    Type: Application
    Filed: September 28, 2020
    Publication date: May 20, 2021
    Applicant: SCHOTT AG
    Inventors: Kurt Nattermann, Jens Ulrich Thomas, Frank-Thomas Lentes, Thorsten Damm, Peter Naß
  • 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: 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: 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: 20200087192
    Abstract: A component of glass or glass ceramic having predamages arranged along at least one predetermined dividing line is provided. The dividing line has a row of predamages lying one behind the other. The predamages pass continuously through the glass or the glass ceramic with at least 90% of the predamages being cylindrically symmetrical. The glass or the glass ceramic has a material compaction of at least 1% relative to an actual material density in a radius of 3 ?m about a longitudinal axis of respective pre-damaged points. The relative weight loss per pre-damaged point is less than 10% and the component has a thickness of at least 3.5 mm.
    Type: Application
    Filed: November 19, 2019
    Publication date: March 19, 2020
    Applicant: SCHOTT AG
    Inventors: Jens Ulrich THOMAS, Frank-Thomas LENTES, Andreas ORTNER, Jonas SCHATZ, Michael KLUGE
  • Publication number: 20200039005
    Abstract: The present disclosure provides a device and a method for laser-based separation of a transparent, brittle workpiece, comprising a laser that emits a laser beam having an intensity (IL) along an optical axis (P), and an optical device. The optical device has at least one one-piece double axicon. The double axicon has an entrance surface and the optical device has an exit surface. The entrance surface is such that in the double axicon, a ring beam is formed. The intensity (IL) in the double axicon is lower than the threshold intensity (IS) of the material of the double axicon. The exit surface is such that a line focus having a maximum intensity (Imax) and a length (LT) is generated in the direction of the laser beam behind the exit.
    Type: Application
    Filed: October 14, 2019
    Publication date: February 6, 2020
    Applicant: SCHOTT AG
    Inventors: Jens Ulrich THOMAS, Frank-Thomas LENTES, Andreas ORTNER
  • Publication number: 20200041804
    Abstract: An optical layered composite includes: a substrate having a front face, a back face, a thickness ds between the front face and the back face and a refractive index ns; and a coating applied to the front face. The coating comprises one or more coating layers. For at least one wavelength ?g in the range from 390 nm to 700 nm, the coating satisfies one of the following criterion: nc<ns; or nc>ns, and d c < k n c 2 - n s 2 · arctan ? n s 2 - 1 n c 2 - n s 2 ; nc is a mean refractive index of the coating layers, weighted by thickness; do is a total thickness of the coating; thicknesses are determined in a direction perpendicular to the front face; and k=?g/4?.
    Type: Application
    Filed: August 1, 2019
    Publication date: February 6, 2020
    Applicant: Schott AG
    Inventors: Jens Ulrich Thomas, Thorsten Damm, Frank-Thomas Lentes, Kurt Nattermann
  • Patent number: 9360617
    Abstract: The invention relates to a mode filter for reducing higher-order modes, with an optical fiber (1), which has a core (2) and a cladding (3) surrounding the latter, wherein the cladding (3) and core (2) have refractive indices that differ from one another. In order to develop an alternative to the prior art, the mode filter according to the invention is designed in such a manner that the fiber (1) has, in a transition region (4) between core (2) and cladding (3), at least one local refractive index modification region (5) which is arranged in the radially outer region of the core (2) and extends into the region of the cladding (3).
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: June 7, 2016
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V., Fried-Schiller-Universitaet Jena
    Inventors: Christian Voigtlaender, Jens Ulrich Thomas, Robert Williams, Stefan Nolte, Andreas Tuennermann
  • Publication number: 20140362878
    Abstract: The invention relates to a mode filter for reducing higher-order modes, with an optical fibre (1), which has a core (2) and a cladding (3) surrounding the latter, wherein the cladding (3) and core (2) have refractive indices that differ from one another. In order to develop an alternative to the prior art, the mode filter according to the invention is designed in such a manner that the fibre (1) has, in a transition region (4) between core (2) and cladding (3), at least one local refractive index modification region (5) which is arranged in the radially outer region of the core (2) and extends into the region of the cladding (3).
    Type: Application
    Filed: September 27, 2012
    Publication date: December 11, 2014
    Applicants: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Friedrich-Schiller-Universitaet Jena
    Inventors: Christian Voigtlaender, Jens Ulrich Thomas, Robert Williams, Stefan Nolte, Andreas Tuennermann
  • Patent number: 8891917
    Abstract: The invention relates to a transverse mode filter in an optical waveguide (3). The aim of the invention is to produce a transverse mode filter that permits a monolithic construction of a laser in a multi-mode waveguide. To achieve this, according to the invention the filter comprises a Fabry-Perot cavity integrated into the optical waveguide (3) and comprising two reflective elements (5) situated at a distance from one another. In addition, the waveguide (3) is modified in the region of the Fabry-Perot cavity and/or in the region of the reflective elements (5) in relation to the remaining regions of the waveguide with respect to the effective refractive index of at least one mode of the waveguide.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: November 18, 2014
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Friedrich-Schiller-Universitaet Jena
    Inventors: Jens Ulrich Thomas, Christian Voigtlaender, Stefan Nolte, César Jáuregui Misas, Fabian Stutzki, Jens Limpert, Andreas Tuennermann
  • Publication number: 20120237162
    Abstract: The invention relates to a transverse mode filter in an optical waveguide (3). The aim of the invention is to produce a transverse mode filter that permits a monolithic construction of a laser in a multi-mode waveguide. To achieve this, according to the invention the filter comprises a Fabry-Perot cavity integrated into the optical waveguide (3) and comprising two reflective elements (5) situated at a distance from one another. In addition, the waveguide (3) is modified in the region of the Fabry-Perot cavity and/or in the region of the reflective elements (5) in relation to the remaining regions of the waveguide with respect to the effective refractive index of at least one mode of the waveguide.
    Type: Application
    Filed: September 15, 2010
    Publication date: September 20, 2012
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN, FRIEDRICH-SCHILLER-UNIVERSITAET JENA
    Inventors: Jens Ulrich Thomas, Christian Voigtlaender, Stefan Nolte, César Jáuregui Misas, Fabian Stutzki, Jens Limpert, Andreas Tuennermann