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:
Mar. 19, 2013
Filed:
Apr. 15, 2011
Kim Atherton, Kirkland, WA (US);
Kim Atherton, Kirkland, WA (US);
Mitutoyo Corporation, Kawasaki-shi, JP;
Abstract
A position sensing device having a high range to resolution ratio comprises a light source arrangement, a moving aperture arrangement and a multiple position sensitive detector (PSD) arrangement. The multiple PSD arrangement comprises a plurality of position sensitive detectors arranged along at least two detection tracks along a measuring axis. Each of the plurality of position sensitive detectors shares a common portion of a total measuring range along the measuring axis with an adjacent position sensitive detector which is on a different detector track. The total measurement range is larger than the detector range of each of the position sensitive detectors.