Patents by Inventor H. Juergen Kreuzer

H. Juergen Kreuzer 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).

  • Method for tracking particles and life forms in three dimensions and in time
    Patent number: 6876474
    Abstract: A method for tracking particles and life forms in three dimensions and in time. The present invention applies a numerical reconstruction approach to digital in-line holographic microscopy images in order to generate a time sequence hologram representing the trajectory of objects such as particles and life forms. By subtracting consecutive (in time) holograms of a particle sample volume and then adding the resulting differences, a final hologram is constructed that contains the time evolution of the object trajectory free from spurious background interference effects.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: April 5, 2005
    Assignee: Dalhousie University
    Inventors: H. Juergen Kreuzer, Manfred H. Jericho
  • Method for tracking particles and life forms in three dimensions and in time
    Publication number: 20040169903
    Abstract: A method for tracking particles and life forms in three dimensions and in time. The present invention applies a numerical reconstruction approach to digital in-line holographic microscopy images in order to generate a time sequence hologram representing the trajectory of objects such as particles and life forms. By subtracting consecutive (in time) holograms of a particle sample volume and then adding the resulting differences, a final hologram is constructed that contains the time evolution of the object trajectory free from spurious background interference effects.
    Type: Application
    Filed: November 26, 2003
    Publication date: September 2, 2004
    Inventors: H. Juergen Kreuzer, Manfred H. Jericho
  • Holographic microscope and method of hologram reconstruction
    Patent number: 6411406
    Abstract: A holographic microscope is described along with a method for numerically reconstructing a holographic image. The method uses a coordinate transformation of the Kirchhoff-Helmholtz equation to remove the non-linear component from the phase factor. The intensity distribution in the transformed coordinate system is then interpolated on an equidistant point grid and Fast-Fourier-Transforms are used to compute the result.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: June 25, 2002
    Assignee: Dalhousie University
    Inventor: H. Juergen Kreuzer