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, 2007
Filed:
May. 16, 2005
Clinton B. Carlisle, Palo Alto, CA (US);
Jahja I. Trisnadi, Cupertino, CA (US);
Charles B. Roxlo, Saratoga, CA (US);
David A. Lehoty, Mt. View, CA (US);
Clinton B. Carlisle, Palo Alto, CA (US);
Jahja I. Trisnadi, Cupertino, CA (US);
Charles B. Roxlo, Saratoga, CA (US);
David A. Lehoty, Mt. View, CA (US);
Silicon Light Machines Corporation, San Jose, CA (US);
Abstract
One embodiment relates to an optical displacement sensor for sensing relative movement between a data input device and a surface by determining displacement of optical features in a succession of frames. The sensor includes an illuminator and a detector. The illuminator has a light source and illumination optics to illuminate a portion of the surface with a planar phase-front. The detector has a plurality of photosensitive elements and imaging optics. The illuminator and the detector are configured such that the illuminated portion of the surface is less than fifty percent larger than a field of view of the photosensitive elements of the detector. Other embodiments are also described.