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:
Oct. 23, 2012
Filed:
Dec. 12, 2006
Sylvain Grosjean, Les Fins, FR;
Michel Willemin, Prêles, CH;
James Harold Lauffenburger, Colorado Springs, CO (US);
Gil Afriat, Colorado Springs, CO (US);
Kevin Scott Buescher, Colorado Springs, CO (US);
Lawrence Bieber, Colorado Springs, CO (US);
Sylvain Grosjean, Les Fins, FR;
Michel Willemin, Prêles, CH;
James Harold Lauffenburger, Colorado Springs, CO (US);
Gil Afriat, Colorado Springs, CO (US);
Kevin Scott Buescher, Colorado Springs, CO (US);
Lawrence Bieber, Colorado Springs, CO (US);
EM Microelectronic-Marin S.A., Marin, CH;
Abstract
The invention concerns an optical pointing device comprising a coherent light source for illuminating a surface portion with radiation, a driver of the coherent light source for controlling coherent light emissions, a photodetector device responsive to radiation reflected from the illuminated surface portion, processing means for determining, based on the photodetector device response, a measurement of relative motion between the optical pointing device and the illuminated portion of the surface, wherein the coherent light source driver is a fault-tolerant driver comprising redundant power control means for limiting the output power of coherent light emissions.