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:
Sep. 19, 2006
Filed:
Nov. 10, 2001
John C. Tsai, Saratoga, CA (US);
John C. Tsai, Saratoga, CA (US);
Excel Precision, Inc., Santa Clara, CA (US);
Abstract
A position determining system (PDS)() or multiple parameters measurement system (MPMS)() particularly useful for translation and rotation measurement of objects having up to five degrees of freedom. A light source () provides light beams () into at least two channels. Each channel may include an interferometer (), reflective target (), beam splitter (), detector (), and receiver (). In concert, the detectors () sense horizontal, vertical, and roll position and the receivers () sense longitudinal and yaw position change. Optionally, modulation can be imposed on the light beams () and phase-sensitive synchronous demodulation used to enhance accuracy.