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Fiber optic acceleration and displacement sensors

Patent image
NRL

A fiber optic sensor for detecting acceleration or displacement includes a fiber optic probe with a multimode transmitting optical fiber, a multimode receiving optical fiber and a edge reflector spaced apart from the fiber probe. The reflector moves in a transverse direction substantially normal to the longitudinal axis of the fiber optic probe, so the amount of light received by the receiving fiber indicates a relative acceleration or a relative displacement of the reflective surface with respect to the fiber probe in the transverse direction of motion of the edge of the reflector. The reflector can be mounted on a cantilever beam. The sensor can have one transmitting fiber, two receiving fiber, and a reflector with two edges, each edge partially covering one of the receiving fibers. A triaxial sensor system has at least two two-fiber sensors.

Inventors: 
Lagakos, Nicholas; Bucaro, Joseph A.; Jarzynski, Jacek; Jarzynski, Legal Representative Barbara
Patent Number: 
Technical domain: 
Optics
FIle Date: 
2008-10-07
Grant Date: 
2010-09-07
Grant time: 
700 days
Grant time percentile rank: 
12
Claim count percentile rank: 
4
Citations percentile rank: 
2
'Cited by' percentile rank: 
1
Assignee: 
US NAVY