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. 09, 2011
Filed:
Aug. 23, 2006
Rene Duijve, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Carsten Heinks, Nordhorn, DE;
Marcel Schemmann, Maria Hoop, NL;
Rene Duijve, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Carsten Heinks, Nordhorn, DE;
Marcel Schemmann, Maria Hoop, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An optical input device for measuring relative movement between an object () and a sensor unit comprising a laser device () having a laser cavity for emitting a measuring beam () and a respective radiation-sensitive detector () for generating a measurement signal representative of changes in the operation of the laser device () as a result of measuring beam radiation re-entering the laser cavity. A sensor unit is provided for measuring relative movement along each measuring axis in an action plane, and the resultant measurement signal from one or each of the sensor units is used to determine distance and/or movement of the input device and the object () relative to each other along a measuring axis transverse to the action plane by summing the offset frequency of a rising and falling slope of the measurement signal.