Patents Assigned to Avago Technology, Ltd.
  • Method and apparatus for improved collection efficiency of speckle based navigation sensors using lightpipes and reflectors
    Patent number: 7041964
    Abstract: Speckle based optical navigation is improved by increasing the collection efficiency of the photodetector through the introduction of a lightpipe or reflector technology. For example, the use of elliptical sidewalls and diffraction gratings in conjunction with a lightpipe leads to improvements in collection efficiency.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: May 9, 2006
    Assignee: Avago Technology, Ltd.
    Inventors: Russell W. Gruhlke, Dennis C. Diaz