Patents by Inventor Hubert Pohlack

Hubert Pohlack 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).

  • Radiation projection arrangement with integrated radiation indicator
    Patent number: 5617250
    Abstract: An arrangement is produced for protection against harmful effects of radiation and for indicating such radiation which can preferably be designed as a viewing window or as goggles and can be used for protecting the eyes from injury due to high-intensity electromagnetic radiation. It includes a transparent substrate and a sequence of thin optical layers which are applied to this substrate and are arranged according to the principle of an optical thin-film resonance absorber system.
    Type: Grant
    Filed: February 15, 1994
    Date of Patent: April 1, 1997
    Assignee: Jenoptik GmbH
    Inventors: Erik Hacker, Hubert Pohlack
  • Resonance absorber
    Patent number: 4441789
    Abstract: An improvement in a resonance absorber of refractive index n and absorption coefficient k wherein a medium of refractive index n.sub.a is disposed frontally thereof is disclosed in which the thickness of the absorption material is made equal to m.lambda./(4n), where m is the whole number closest to 2na/(.pi.k) where n equals n.sub.a and wherein the interference layers have alternatingly low and high refractive indices in that order when m is even and alternatingly high and low refractive indices in that order when m is odd.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: April 10, 1984
    Assignee: Jenoptik Jena GmbH
    Inventor: Hubert Pohlack
  • Arrangement for the induced absorption of electromagnetic radiation
    Patent number: 4335935
    Abstract: An absorption device for electromagnetic radiation includes a plurality of layers positioned to the path of the radiation, in the following order: a transparent layer, an absorbing layer, a plurality of non-absorbing layers having alternate low and high refractive indices, and a final transparent layer.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: June 22, 1982
    Assignee: Jenoptik Jena GmbH
    Inventor: Hubert Pohlack