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:
Mar. 22, 2005
Filed:
Nov. 14, 2001
W. Don Morison, Mississauga, CA;
Gerald Manuelpillai, Ajax, CA;
Roderick C. Tennyson, Toronto, CA;
Thierry Cherpillod, Maple, CA;
Dominic Rouse, Toronto, CA;
W. Don Morison, Mississauga, CA;
Gerald Manuelpillai, Ajax, CA;
Roderick C. Tennyson, Toronto, CA;
Thierry Cherpillod, Maple, CA;
Dominic Rouse, Toronto, CA;
Fiber Optic Systems Technology, Inc., West Chester, PA (US);
Abstract
A fiber optic sensor includes two reflective elements in series. The first reflective element is formed as a partially mirrored surface on the end of a single-mode optical fiber lead which is bonded into a ferrule. A sleeve is used to join the ferrule to a second ferrule which is turn is bonded to a length of single-mode optical fiber. The second reflective element is a partially mirrored surface on the cleaved end of the second fiber. The second fiber may be affixed to or embedded in a structure to be monitored and changes its optical path length in response to a condition of the structure. Light introduced into the sensor is reflected from the first or second reflective element and thus follows two optical paths. The path length difference between the two optical paths is twice the optical path length of the second fiber.