Distributed, spatially resolving optical fiber strain gauge
Fiber optic bending and positioning sensor including a light emission surface formed on a portion of a light guide
Fiber grating-based sensing system with interferometric wavelength-shift detection Patent #: 5361130
ApplicationNo. 550029 filed on 10/30/1995
US Classes:356/32, MATERIAL STRAIN ANALYSIS250/227.14, Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell)250/227.16, With detection of fiber microbend caused by parameter affecting fiber385/12, OPTICAL WAVEGUIDE SENSOR385/13Including physical deformation or movement of waveguide
ExaminersPrimary: Font, Frank G.
Assistant: Stafira, Michael P.
Attorney, Agent or Firm
International ClassG01B 011/16
Foreign Application Priority Data1994-11-18 FR
AbstractThe present invention relates to a planar, rosette-type, optical microsystem with strain gauges having dielectric guides used for measuring a system of strains or stresses applied to a part, in which the part is under purely longitudinal strain, at least one rosette being formed by at least two strain gauges with dielectric guides (J1, J2, J3) and in which a calculating circuit makes it possible to determine said strain by resolving a system of equations.
Field of SearchMATERIAL STRAIN ANALYSIS
OPTICAL WAVEGUIDE SENSOR
Including physical deformation or movement of waveguide
INTEGRATED OPTICAL CIRCUIT
Coupling between modes in a waveguide or fiber
WITH SPLICE (PERMANENT CONNECTION)
With detection of fiber microbend caused by parameter affecting fiber
Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell)