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:
Jan. 11, 2011
Filed:
Oct. 01, 2008
Applicant:
Chao-wen Liang, Taoyuan, TW;
Inventor:
Chao-Wen Liang, Taoyuan, TW;
Assignee:
National Central University, Taoyuan, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01B 9/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A tilting angle measuring device includes an optical device, a four-quadrant optical detector and a computing unit. By the optical device, a light beam emitted by the coherent light source is processed into a reference beam and a test beam. The four-quadrant optical detector has four photoelectric converting units arranged in an array for respectively receiving the reference and test beams. The computing unit is electrically connected to the four-quadrant optical detector for computing a tilting angle of the object with respect to a predetermined position according to four intensity values of the test beam.