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:
Dec. 16, 2008
Filed:
Nov. 16, 2005
Menachem Nathan, Tel Aviv, IL;
Ben Zion Steinberg, Kfar-Saba, IL;
Oren Levy, Shoham, IL;
Amir Boag, Yavne, IL;
Menachem Nathan, Tel Aviv, IL;
Ben Zion Steinberg, Kfar-Saba, IL;
Oren Levy, Shoham, IL;
Amir Boag, Yavne, IL;
Ramot At Tel Aviv University Ltd., Tel Aviv, IL;
Abstract
A displacement sensor comprising at least one pair of co-planar photonic crystal waveguide (PCWG) sections aligned along or parallel to a common axis and separated by a gap, one PCWG section of a pair operative to perform a displacement relative to the other section of the pair. In some embodiments, the sensor is linear, comprising two PCWG sections seperated by a gap that forms a cross PCWG, the displacement sensing performed preferrably differentially between two edges of the cross PCWG. In other embodiments, the sensor includes Mach Zehnder Interferometer (MZI) configurations with gaps between fixed and moving PCWG sections. Displacement induced changes in the gap widths are reflected in changes in an output parameter of the MZI.