Patents by Inventor Ralf Heilmann

Ralf Heilmann 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).

  • Hybrid transmission-reflection grating
    Patent number: 7492989
    Abstract: A hybrid transmission-reflection grating includes an array of essentially parallel principal interfaces, with each principal interface separating a first medium and a second medium. The first medium has a first index of refraction, and the second medium has a second index of refraction. The first medium allows for transmission of quantum-mechanical objects in excess of one percent of an incident number of quantum-mechanical objects. The array of principal interfaces has a spacing distance between adjacent principal interfaces. The first medium has a width in the direction normal to the principal interfaces, the width being less than the spacing distance.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: February 17, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Ralf Heilmann, Mark Schattenburg
  • Hybrid transmission-reflection grating
    Publication number: 20070280595
    Abstract: A hybrid transmission-reflection grating includes an array of essentially parallel principal interfaces, with each principal interface separating a first medium and a second medium. The first medium has a first index of refraction, and the second medium has a second index of refraction. The first medium allows for transmission of quantum-mechanical objects in excess of one percent of an incident number of quantum-mechanical objects. The array of principal interfaces has a spacing distance between adjacent principal interfaces. The first medium has a width in the direction normal to the principal interfaces, the width being less than the spacing distance.
    Type: Application
    Filed: May 23, 2006
    Publication date: December 6, 2007
    Inventors: Ralf Heilmann, Mark Schattenburg