Patents by Inventor Carl D. Leonard

Carl D. Leonard 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).

  • Systems and methods for object detection using beam widening optics
    Patent number: 5313262
    Abstract: In exemplary embodiments, a diffraction grating is placed in the beam path of the generated light source. The grating expands the beam's field of view by distributing the transmitted radiation into plural sub-fields. Sub-fields associated with distant objects are set to a greater intensity to ensure reflection of the sub-fields back to the receiver. Sub-fields directed to closer objects have a lesser intensity to avoid detection of false objects.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: May 17, 1994
    Assignee: IMRA America, Inc.
    Inventor: Carl D. Leonard
  • Method of bragg angle adjustments for copying holograms
    Patent number: 4575192
    Abstract: A method of copying a thick hologram, recorded at wavelength .lambda..sub.1, so that the copy can be efficiently read out with a beam .lambda..sub.3 at the same incident angle as used to efficiently read out the original. The method involves copying the hologram using wavelength .lambda..sub.2 at a predetermined incident angle, which incident angle provides fringe angles in the copy to yield maximum diffraction efficiency of the read-out beam .lambda..sub.3.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: March 11, 1986
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Joseph G. M. Duthie, Charles R. Christensen, Carl D. Leonard