Fiber optic sensors for determining 3D shape

US10551170B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Gert Wim 'T Hooft · Eindhoven, NL
• Robert Manzke · Bönebüttel, DE

Key dates

• Filing date: Jan 23, 2012
• Grant date: Feb 4, 2020
• Expiry date: Jan 22, 2035

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2034/2061
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An optical shape sensing system employing an elongated device, an optical fiber embedded within the elongated device with the optical fiber, an optical interrogation console and a 3D shape reconstructor. In operation, the optical interrogation console generates reflection spectrum data indicative of a measurement of both an amplitude and a phase of a reflection for each core of the optical fiber as a function of wavelength. The 3D shape reconstructor executes a generation of local strain data for a plurality of positions along the optical fiber responsive to the reflection spectrum data, a generation of local curvature and torsion angle data as a function of each local strain along the fiber, and a reconstruction of the 3D shape of the optical fiber as a function of each local curvature and torsion angle along the optical fiber.