IDiyas

For the Inventor, By the Inventor

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.:

US 9436003 B1

PDFFull Text
Date of Patent:
Sep. 06, 2016

Filed:

Apr. 29, 2015

Robust index correction of an angular encoder in a three-dimensional coordinate measurement device

Applicant:

Faro Technologies, Inc., Lake Mary, FL (US);

Inventors:

Alexander Kramer, Kornwestheim, DE;

Martin Ossig, Tamm, DE;

Reinhard Becker, Ludwigsburg, DE;

Assignee:

FARO TECHNOLOGIES, INC., Lake Mary, FL (US);

Attorney:

Cantor Colburn LLP

Primary Examiner:

Seung C Sohn

Int. Cl.
CPC ...
G01D 18/00 (2006.01); G02B 26/10 (2006.01); G01D 5/347 (2006.01); G01D 5/244 (2006.01); G01S 17/42 (2006.01); G01S 17/89 (2006.01); G01S 7/481 (2006.01); G02B 17/08 (2006.01); G01S 7/497 (2006.01); G01C 15/00 (2006.01); G01S 17/66 (2006.01);
U.S. Cl.
CPC ...
G02B 26/105 (2013.01); G01C 15/002 (2013.01); G01D 5/24452 (2013.01); G01D 5/3473 (2013.01); G01D 5/34707 (2013.01); G01D 18/00 (2013.01); G01S 7/4817 (2013.01); G01S 7/497 (2013.01); G01S 17/42 (2013.01); G01S 17/89 (2013.01); G02B 17/08 (2013.01); G01S 17/66 (2013.01);
Abstract

A 3D measurement device sends a beam of light to a point on an object, receives the reflected light, and determines a distance and two angles to the point, one of the angles measured by an angular encoder, which includes a disk having incremental marks and an index mark. Light from the 3D device is rotated to reflect light from a reference reflector to produce a first synchronization signal. A first difference angle is determined based on counts of the incremental marks and on the first synchronization signal. Light from the 3D device is rotated to reflect light from the reference reflector to produce a second synchronization signal. A second difference angle is determined based on counts of the incremental marks and on the second synchronization signal. The reference correction value of the index mark is determined based on the first and second difference angles.

Find Patent Forward Citations

Loading…