Patents by Inventor STEFAN ERDMANN

STEFAN ERDMANN 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).

  • Photo-acoustic device and method for non-contact measurement of thin layers
    Patent number: 10436754
    Abstract: A measuring device for non-mechanical-contact measurement of a layer, the measuring device including a light source operative to generate a pulse adapted to interact with the layer so as to generate a thermal wave in a gas medium present adjacent the layer. The thermal wave causes an acoustic signal to be generated. The measuring device further includes a detector adapted to detect a first signal responsive to the acoustic signal, the detector not being in mechanical contact with the layer. The first signal is representative of the measured layer.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: October 8, 2019
    Assignee: NOVELIS INC.
    Inventors: Heinrich Prinzhorn, Stefan Erdmann, Thomas Wuttke, Andreas Bauer, Bernd Abel, Ales Charvat
  • PHOTO-ACOUSTIC DEVICE AND METHOD FOR NON-CONTACT MEASUREMENT OF THIN LAYERS
    Publication number: 20180003679
    Abstract: A measuring device for non-mechanical-contact measurement of a layer, the measuring device including a light source operative to generate a pulse adapted to interact with the layer so as to generate a thermal wave in a gas medium present adjacent the layer. The thermal wave causes an acoustic signal to be generated. The measuring device further includes a detector adapted to detect a first signal responsive to the acoustic signal, the detector not being in mechanical contact with the layer. The first signal is representative of the measured layer.
    Type: Application
    Filed: September 13, 2017
    Publication date: January 4, 2018
    Applicant: Novelis Inc.
    Inventors: HEINRICH PRINZHORN, STEFAN ERDMANN, THOMAS WUTTKE, ANDREAS BAUER, BERND ABEL, ALES CHARVAT
  • Photo-acoustic device and method for non-contact measurement of thin layers
    Patent number: 9791419
    Abstract: A measuring device for non-mechanical-contact measurement of a layer, the measuring device including a light source operative to generate a pulse adapted to interact with the layer so as to generate a thermal wave in a gas medium present adjacent the layer. The thermal wave causes an acoustic signal to be generated. The measuring device further includes a detector adapted to detect a first signal responsive to the acoustic signal, the detector not being in mechanical contact with the layer. The first signal is representative of the measured layer.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: October 17, 2017
    Assignee: Novelis Inc.
    Inventors: Heinrich Prinzhorn, Stefan Erdmann, Thomas Wuttke, Andreas Bauer, Bernd Abel, Ales Charvat
  • PHOTO-ACOUSTIC DEVICE AND METHOD FOR NON-CONTACT MEASUREMENT OF THIN LAYERS
    Publication number: 20150233870
    Abstract: A measuring device for non-mechanical-contact measurement of a layer, the measuring device including a light source operative to generate a pulse adapted to interact with the layer so as to generate a thermal wave in a gas medium present adjacent the layer. The thermal wave causes an acoustic signal to be generated. The measuring device further includes a detector adapted to detect a first signal responsive to the acoustic signal, the detector not being in mechanical contact with the layer. The first signal is representative of the measured layer.
    Type: Application
    Filed: February 16, 2015
    Publication date: August 20, 2015
    Inventors: HEINRICH PRINZHORN, STEFAN ERDMANN, THOMAS WUTTKE, ANDREAS BAUER, BERND ABEL, ALES CHARVAT