Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate
2007-05-22
2007-05-22
Connelly-Cushwa, Michelle (Department: 2874)
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
Reexamination Certificate
active
10521335
ABSTRACT:
Surface profiling apparatus (10) according to one embodiment comprises three long period gratings (LPGs) (12, 14, 16) fabricated in progressive three layered (PTL) fibre (18) and embedded within a deformable carrier member (40) comprising a skeleton (42) provided between two sheets of flexible rubber skin (44, 46). The LPGs (12, 14, 16) are illuminated by three wavelength modulated, narrow bandwidth optical signals, each having a different wavelength and modulation frequency. A photodetector (26) connected to three lock-in amplifiers (28, 30, 32) measures the amplitudes of the first and second harmonic frequency components of the photodetector output signal corresponding to each LPG (12, 14, 16). Similar surface profiling apparatus (10) forms the basis for respiratory function monitoring apparatus (100) in which five LPGs are provided within each of four PTL fibres (104, 106, 108, 110) and embedded in four carrier members (40a–d) attached to a garment (114) to be worn by a subject.
REFERENCES:
patent: 4669814 (1987-06-01), Dyott
patent: 4807950 (1989-02-01), Glenn et al.
patent: 5134281 (1992-07-01), Bryenton et al.
patent: 5641956 (1997-06-01), Vengsarkar et al.
patent: 5748312 (1998-05-01), Kersey et al.
patent: 5754293 (1998-05-01), Farhadiroushan
patent: 5920582 (1999-07-01), Byron
patent: 5966490 (1999-10-01), Minns et al.
patent: 6256090 (2001-07-01), Chen et al.
patent: 6357913 (2002-03-01), Kim et al.
patent: 2004/0078219 (2004-04-01), Kaylor et al.
patent: 1372006 (2003-12-01), None
patent: WO 86/01303 (1986-02-01), None
patent: WO 93/22624 (1993-11-01), None
patent: WO 93/22624 (1993-11-01), None
patent: WO 00/70307 (2000-11-01), None
patent: WO 00/70307 (2000-11-01), None
A. B. Lobo Ribeiro et al., “General error function of synthetic-heterodyne signal processing in interferometric fibre-optic sensors”, International Journal of Optoetectronics, 1995, vol. 10, No. 3, XP-000587864, pp. 205-209.
S. K. Yao et al., “Microbending loss in a single-mode fiber in the pure-bend loss regime”, Applied Optics, vol. 21, No. 17, Sep. 1, 1982, XP-001093774, pp. 3059-3060.
Allsop Thomas David Paul
Bennion Ian
Earthrowl-Gould Timothy
Aston University
Buckley Maschoff & Talwalkar LLC
Chu Chris H.
Connelly-Cushwa Michelle
LandOfFree
Optical waveguide based surface profiling apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical waveguide based surface profiling apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical waveguide based surface profiling apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3811273