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:
Aug. 23, 2005
Filed:
Dec. 19, 2003
Marshall T. Depue, San Mateo, CA (US);
Dale W. Schroeder, Scotts Valley, CA (US);
Tong Xie, San Jose, CA (US);
Marshall T. DePue, San Mateo, CA (US);
Dale W. Schroeder, Scotts Valley, CA (US);
Tong Xie, San Jose, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A method for determining relative movement between an optical navigation device and a navigation terrain includes generating two overlapping coherent optical beams, and generating a pattern of interference fringes between the two overlapping optical beams. The method further includes illuminating a surface portion of the navigation terrain with the pattern of interference fringes, imaging a fringe-illuminated surface portion, and generating a pattern of signals in response to the imaged fringe-illuminated surface portion.