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. 10, 2012
Filed:
Apr. 29, 2010
Seung-han Yang, Daegu, KR;
Sung-ryung Park, Daegu, KR;
Seung-Han Yang, Daegu, KR;
Sung-Ryung Park, Daegu, KR;
Abstract
In an apparatus for measuring a quasi-static error of a rotation driving shaft, a positional error and an angular error in each of X, Y, and Z axis directions during rotation of a driving shaft is measured by means of a single measurement apparatus. In the apparatus, a first splitter, a second splitter, and a reflector spectrally output or reflect a laser beam, which is output from a laser driving device, to a first position sensor and a second position sensor, so that it is possible to obtain every error information on positional errors and angular errors in X, Y, and Z axis directions of a rotation driving shaft through input position change data of the inputted laser beam.