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Optical fiber instrument system for detecting twist of elongated instruments

  • US 8,818,143 B2
  • Filed: 08/24/2012
  • Issued: 08/26/2014
  • Est. Priority Date: 04/20/2007
  • Status: Active Grant
First Claim
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1. An instrument system comprising:

  • an elongate body having a longitudinal axis and capable of being twisted about the longitudinal axis andan optical fiber operatively coupled with the elongate body and having a strain sensor provided thereon, the strain sensor configured to indicate twist of the elongate body, wherein the optical fiber comprises a first portion and a second portion, each portion having a strain sensor provided thereon, and wherein the strain sensor provided on the first portion has greater reflectivity than the strain sensor provided on the second portion.

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