Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate
2009-02-23
2010-10-12
Lepisto, Ryan (Department: 2883)
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
C385S012000, C385S037000
Reexamination Certificate
active
07813599
ABSTRACT:
A method of determining the shape of an unbound optical fiber includes collecting strain data along a length of the fiber, calculating curvature and bending direction data of the fiber using the strain data, curve-fitting the curvature and bending direction data to derive curvature and bending direction functions, calculating a torsion function using the bending direction function, and determining the 3D shape from the curvature, bending direction, and torsion functions. An apparatus for determining the 3D shape of the fiber includes a fiber optic cable unbound with respect to a protective sleeve, strain sensors positioned along the cable, and a controller in communication with the sensors. The controller has an algorithm for determining a 3D shape and end position of the fiber by calculating a set of curvature and bending direction data, deriving curvature, bending, and torsion functions, and solving Frenet-Serret equations using these functions.
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Galus Helen M.
Lepisto Ryan
The United States of America as represented by the Administrator
Wong Eric
LandOfFree
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