Patents by Inventor Guenter Maschke

Guenter Maschke 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).

  • Interferometer arrangement with adjustable optical path length difference for detecting a distance between different layers of an eye
    Patent number: 5719673
    Abstract: An interferometer arrangement has an adjustable optical path length difference in at least one interferometer arm and a photoelectric receiver for detecting the interference signals generated by the interferometer. An incremental grating transmitter is coupled to the arrangement with a device for changing the optical path length difference and for generating a reference signal which changes its frequency like that of the interference signal depending on the rate of change of the optical path difference.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: February 17, 1998
    Assignee: Carl Zeiss Jena GmbH
    Inventors: Andreas Dorsel, Karl-Heinz Donnerhacke, Beate Moeller, Guenter Maschke