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:
Apr. 07, 2009
Filed:
May. 12, 2004
Casey Edward Emtman, Woodinville, WA (US);
Andrew Michael Patzwald, Kirkland, WA (US);
Benjamin Keith Jones, Seattle, WA (US);
Casey Edward Emtman, Woodinville, WA (US);
Andrew Michael Patzwald, Kirkland, WA (US);
Benjamin Keith Jones, Seattle, WA (US);
Mitutoyo Corporation, Kawasaki, JP;
Abstract
A displacement measurement device has a detector area which is larger than the area of the beam spot reflected from the measurement surface. The detector area is made larger than the size of the beam spot on the detector area, in order to accommodate shifts in the location of the beam spot due to changes in the precise locations of the components of the displacement measurement device. The subset of pixels in the detector area having advantageous correlation characteristics, is then selected to perform the correlation calculation, thereby reducing data processing time requirements.