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:
Nov. 03, 2020
Filed:
Sep. 26, 2014
Applicant:
Renishaw Plc, Gloucestershire, GB;
Inventor:
Simon Eliot McAdam, Nailsworth, GB;
Assignee:
RENISHAW PLC, Wotton-Under-Edge, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/34 (2006.01); G01D 5/347 (2006.01); G01D 5/38 (2006.01); G01D 5/36 (2006.01); G01D 5/245 (2006.01);
U.S. Cl.
CPC ...
G01D 5/34715 (2013.01); G01D 5/2457 (2013.01); G01D 5/366 (2013.01); G01D 5/38 (2013.01);
Abstract
An encoder apparatus including a scale including a series of features defining at least one scale track and a readhead for reading the scale's features. The readhead includes at least one light source for illuminating the scale and at least one detector. The configuration of the at least one light source is such that there is a structure in the light projected toward the scale. The readhead is configured such that the structure is angled so that it is substantially misaligned with respect to the scale's features so as to reduce measurement error in the signal output by the readhead.