Patents by Inventor Mark Branham

Mark Branham 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).

  • Patent number: 11391959
    Abstract: Techniques are provided for laser illumination employing closely spaced laser beams. A system implementing the techniques according to an embodiment includes a semi-cylindrical optical block comprising a curved surface and a planar surface. The system further includes two laser sources configured to direct first and second laser beams to the curved surface, such that the first laser beam enters and exits the block parallel to and offset from the planar surface by a selected translation distance, and the second laser beam enters the block at a critical angle relative to the planar surface. The critical angle is associated with total internal reflection of the second laser beam along the planar surface, such that the second laser beam exits the block parallel to, and separated from, the first laser beam exiting the optical block. The separation of the exiting first and second laser beams is controlled by the selected translation distance.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: July 19, 2022
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Daniel N. Kokubun, Mark Branham, Sidney Pang, Mark Segawa
  • Publication number: 20210055567
    Abstract: Techniques are provided for laser illumination employing closely spaced laser beams. A system implementing the techniques according to an embodiment includes a semi-cylindrical optical block comprising a curved surface and a planar surface. The system further includes two laser sources configured to direct first and second laser beams to the curved surface, such that the first laser beam enters and exits the block parallel to and offset from the planar surface by a selected translation distance, and the second laser beam enters the block at a critical angle relative to the planar surface. The critical angle is associated with total internal reflection of the second laser beam along the planar surface, such that the second laser beam exits the block parallel to, and separated from, the first laser beam exiting the optical block. The separation of the exiting first and second laser beams is controlled by the selected translation distance.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 25, 2021
    Applicant: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Daniel N. Kokubun, Mark Branham, Sidney Pang, Mark Segawa
  • Patent number: 7051728
    Abstract: A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by: T f = ? 3.9 + 6.5 ? ? cos 2 ? ? ? + ? 1 2 ? [ c 66 ? T c 66 ? sin 2 ? ? + c 44 ? T c 44 ? cos 2 ? ? + T c 14 ? c 14 ? sin ? ? 2 ? ? ? c 66 ? sin 2 ? ? + c 44 ? cos 2 ? ? + c 14 ? sin ? ? 2 ? ? ? ] + ? [ a ? · ( sin ? ( ? · ? + ? ? ) + sin ? ( ? · ? + ? ? ) 2 ) ] + ? where quartz plate thickness is chosen in accordance with a desired frequency. This useful behavior can be manipulated such that a quartz plate is designed to counteract frequency shifts over temperature excursion of other electrical components found in typical oscillator circuits.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: May 30, 2006
    Inventor: Mark Branham
  • Publication number: 20040189154
    Abstract: A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by: 1 T f = ⁢ 3.9 + 6.
    Type: Application
    Filed: April 14, 2004
    Publication date: September 30, 2004
    Inventor: Mark Branham
  • Patent number: 6744182
    Abstract: A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by: T f = 3.9 + 6.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: June 1, 2004
    Inventor: Mark Branham
  • Publication number: 20030042823
    Abstract: A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by: 1 T f = 3.9 + 6.
    Type: Application
    Filed: July 23, 2002
    Publication date: March 6, 2003
    Inventor: Mark Branham
  • Patent number: 6181073
    Abstract: A piezoelectric illumination control circuit for a microscope comprising a tunable frequency source of alternating current, a piezoelectric crystal having an impedance dependent on operating frequency, driven by the tunable frequency source of alternating current, and a load driven by the piezoelectric crystal. A second embodiment comprises a piezoelectric illumination control circuit for a microscope, comprising a constant frequency source of alternating current, a piezoelectric crystal coupled to a tunable dummy reactive load for the purpose of varying the impedance of the crystal and dummy load, the piezoelectric crystal driven by the constant frequency source of alternating current, and a load driven by the piezoelectric crystal.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: January 30, 2001
    Assignee: Leica Microsystems Inc.
    Inventor: Mark Branham