The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2006
Filed:
Jul. 31, 2003
Applicants:
Russell W. Gruhlke, Fort Collins, CO (US);
Dennis C. Diaz, Windsor, CO (US);
Inventors:
Russell W. Gruhlke, Fort Collins, CO (US);
Dennis C. Diaz, Windsor, CO (US);
Assignee:
Avago Technology, Ltd., Singapore, SG;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 40/14 (2006.01);
U.S. Cl.
CPC ...
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.