Patents by Inventor David A. Langsam

David A. Langsam 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).

  • Alignment system and method for optical satellite communication
    Patent number: 6819874
    Abstract: An optical communication terminal transmits data via an optical signal with a transmit mirror positioned to direct the optical signal. The optical communication terminal includes a processor configured to develop a control signal for a mirror controller to establish an optimal position of the transmit mirror. The optical communication terminal further includes a modulator coupled to the processor that modulates the optical signal in accordance with a position of the transmit mirror during transmission of the optical signal. The optimal position of the transmit mirror may be established by a scanning routine that adjusts the position of the transmit mirror to a plurality of predetermined offset positions during transmission of the optical signal. The intensity of the optical signal as received by a further optical communication terminal is then determined and provided via modulation of a further optical signal transmitted back to the first-named optical communication terminal.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: November 16, 2004
    Assignee: The Directv Group, Inc.
    Inventors: Cecilia Y. Cheng, Robert R. Hayes, David A. Langsam, Andrew L. Strodtbeck
  • Alignment system and method for optical satellite communication
    Publication number: 20040141754
    Abstract: An optical communication terminal transmits data via an optical signal with a transmit mirror positioned to direct the optical signal. The optical communication terminal includes a processor configured to develop a control signal for a mirror controller to establish an optimal position of the transmit mirror. The optical communication terminal further includes a modulator coupled to the processor that modulates the optical signal in accordance with a position of the transmit mirror during transmission of the optical signal. The optimal position of the transmit mirror may be established by a scanning routine that adjusts the position of the transmit mirror to a plurality of predetermined offset positions during transmission of the optical signal. The intensity of the optical signal as received by a further optical communication terminal is then determined and provided via modulation of a further optical signal transmitted back to the first-named optical communication terminal.
    Type: Application
    Filed: April 22, 2003
    Publication date: July 22, 2004
    Applicant: Hughes Electronics Corporation
    Inventors: Cecilia Y. Cheng, Robert R. Hayes, David A. Langsam, Andrew L. Strodtbeck
  • Alignment system and method for optical satellite communication
    Patent number: 6577421
    Abstract: An optical communication terminal transmits data via an optical signal with a transmit mirror positioned to direct the optical signal. The optical communication terminal includes a processor configured to develop a control signal for a mirror controller to establish an optimal position of the transmit mirror. The optical communication terminal further includes a modulator coupled to the processor that modulates the optical signal in accordance with a position of the transmit mirror during transmission of the optical signal. The optimal position of the transmit mirror may be established by a scanning routine that adjusts the position of the transmit mirror to a plurality of predetermined offset positions during transmission of the optical signal. The intensity of the optical signal as received by a further optical communication terminal is then determined and provided via modulation of a further optical signal transmitted back to the first-named optical communication terminal.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: June 10, 2003
    Assignee: Hughes Electronics Corporation
    Inventors: Cecilia Y. Cheng, Robert R. Hayes, David A. Langsam, Andrew L. Strodtbeck