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| Number | Title | Issue Date |
| 8135247 | Packaged sensors and harsh environment systems with packaged sensors A fiber sensor package is disclosed. The fiber sensor package includes an interconnection between a first optical fiber and a second optical fiber within a tubing such that the first and second optical fibers are at least partially disposed within that tubing. A bon... | 03/13/2012 |
| 8121442 | Optical fiber surveillance topology In accordance with an aspect of the disclosed technology, a fiber surveillance system includes a single optical fiber, used, for example, in the detection of acoustic signals associated with vibrations or other activity. In one embodiment of the disclosed technology... | 02/21/2012 |
| 8094977 | Intrusion detection system for use on single mode optical fiber using a simplified polarimeter A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which u... | 01/10/2012 |
| 8059925 | Optical input system and method An optical system and method are disclosed. In an exemplary embodiment, the optical input system comprises a fiber optic cable defining an axial beam path, the fiber optic cable configured to reversibly deform at a bend location; an optical source coupled to the fib... | 11/15/2011 |
| 8050523 | Optical fiber shape sensing systems A medical instrument system includes an elongate flexible instrument body with an optical fiber substantially encapsulated in a wall of the instrument body, the optical fiber including one or more fiber gratings. A detector is operatively coupled to the optical fibe... | 11/01/2011 |
| 8005325 | Apparatus for sensing a motion The present disclosure provides an apparatus for sensing a motion. The apparatus comprises an optical fibre portion comprising a Bragg grating and an element for reducing an impact of an external force that is transversal to the Bragg grating. Further, the apparatus... | 08/23/2011 |
| 7974503 | Fiber grating sensor A fiber grating sensor including an elastic circular plate and one or two FBG'ss attached to the bottom surface of the elastic circular plate. Two ends of the FBG are connected to an optic fiber for signal transmission. The fiber grating sensor readouts are independ... | 07/05/2011 |
| 7889955 | Micromachined optical pressure sensor A pressure sensor including: a deflectable diaphragm including a substantially central boss and channel; and, an optical waveguide having first and second arms, wherein the first arm is substantially aligned with an edge of the boss and the second arm is substantial... | 02/15/2011 |
| 7885491 | Method for producing a bending sensor At least one sensing region is formed on the bending sensor by providing a flexurally elastic base cover which is interrupted in at least one partial region of the sensing region or is structured using elevations and/or depressions. At least one planar optical fiber... | 02/08/2011 |
| 7881567 | Optical device for monitoring a rotatable shaft with an oriented axis An optical device for monitoring a rotatable shaft is disclosed. The optical device has an optical waveguide arranged on the rotatable shaft and an optical sensor. The optical device further has a transmitting unit transmit the light signal, a transfer device to tra... | 02/01/2011 |
| 7840102 | Distributed optical pressure and temperature sensors Disclosed herein is a carrier for an optical fiber having a plurality of optical sensors located thereon. Such carrier can be a thick-walled capillary tube or other shapes. The carrier has a sealed hollow body with a side wall. The side wall is profiled at least one... | 11/23/2010 |
| 7813599 | Method and apparatus for shape and end position determination using an optical fiber 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 ... | 10/12/2010 |
| 7796844 | Temperature-compensated fibre optic strain gauge A temperature-compensated fibet optic strain gauge (10) for measuring strain of a host structure (5), the strain gauge (10) comprising: a mount (20) having a void (19) separating a first section (17) from a second section ( | 09/14/2010 |
| 7778500 | Optical fiber strain sensor An optical fiber strain sensor, a method of fabricating the same, and a method of sensing strain. The method of strain sensing comprises providing an optical fiber having a fiber Bragg grating (FBG) formed therein; subjecting the optical fiber to a strain inducing f... | 08/17/2010 |
| 7738746 | Optical elements for waveguide-based optical touch screens A data input apparatus having at least one transmit element coupled to a source of light of a predetermined wavelength, at least one light receive element and a detection device to detect interruption of beams of the light of said predetermined wavelength extending ... | 06/15/2010 |
| 7729568 | Optical device having stress layer inducing refraction index variation in a partial region of a substrate by photoelastic effect The application relates to an optical device for enhancing the stress to be generated in a substrate in comparison with a conventional technique. To this end, the optical device includes a substrate having a photoelastic effect, a first stress layer formed on a firs... | 06/01/2010 |
| 7729566 | Method for the monitoring and control of a process A method of sensing a process utilizing a sensing apparatus consisting of more than one diode laser having select lasing frequencies, a multiplexer optically coupled to the outputs of the diode lasers with the multiplexer being further optically coupled to a pitch s... | 06/01/2010 |
| 7729567 | Fiber optic transducer for simultaneous pressure and temperature measurement in fluid flow The present invention relates a fiber optic transducer (FOT) and methods for measuring the pressure and temperature of a flowing fluid using such FOT, wherein such FOT contains a fiber optic having fiber Bragg gratings. The fiber Bragg gratings are measured during a... | 06/01/2010 |
| 7720324 | Optical strain gauge strips An optical strain gage (1) for multi-axis strain measurement includes at least two linear light waveguide sections (2, 3, 4) with Bragg gratings (5). These are arranged next to one another in a prescribed angle (19) of 90° or 45° on a s... | 05/18/2010 |
| 7720325 | Optical turnaround system A technique is provided for utilizing an optical fiber in a variety of sensing applications and environments by beneficially routing the optical fiber. A continuous optical fiber is created to provide optical continuity between two ends of the optical fiber. The opt... | 05/18/2010 |
| 7706641 | Monitoring individual fibers of an optical cable for intrusion Some or all of the optical fibers of a single-mode or multi-mode cable are monitored for intrusion by transmitting through the fibers a signal which can be analyzed for changes in its characteristics which are indicative of movement as a prelude to an intrusion even... | 04/27/2010 |
| 7702190 | Fiber Bragg grating sensor An optical fiber strain sensor, a method of fabricating the same, and a method of sensing strain (1200). The method of strain sensing comprises providing an optical fiber having at least a first fiber Bragg grating (FBG) and a second FBG formed therein (12... | 04/20/2010 |
| 7697798 | Fiber optic pressure sensors and catheters A catheter with many fiber optic pressure sensors. The sensor diaphragm is formed from a wafer with a thin silicon layer and a silicon substrate layer separated by a silicon dioxide layer. A method includes masking and etching channels through the silicon substrate ... | 04/13/2010 |
| 7693359 | Intrusion detection system for use on single mode optical fiber using a cost reduced polarimeter A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which u... | 04/06/2010 |
| 7689071 | Fiber optic pressure sensor for catheter use The invention provides a miniature robust fiber optic pressure sensor. The miniature fiber optic sensor comprises a Fabry-Perot chip bonded to an optical fiber. The invention provides a new sensor design that reduces the amount of adhesive required to bond the optic... | 03/30/2010 |
| 7680363 | Optical pressure sensor The present invention aims to provide an optical pressure sensor capable of detecting a more minute pressure change. A base film is formed with a through hole passing first and second surfaces, an optical fiber is fixed to the base film at a region other than the FB... | 03/16/2010 |
| 7660496 | Structural joint strain monitoring apparatus and system Structural joint strain monitoring apparatus 92 comprises jacket means 52 in the form of first and second jacket elements 62, each having a primary jacket part 62a and substantially perpendicular secondary jacket part 62b... | 02/09/2010 |
| 7660495 | Package elements and methods for securing a getter A getter sheet is secured within a package element in a condition of elastic deformation by positioning the getter sheet between a base and a cap of a package with at least one portion of the getter sheet in contact with the package. When positioned within the packa... | 02/09/2010 |
| 7646945 | Structural member bend radius and shape sensor and measurement apparatus Structural member bend radius sensor apparatus 90 comprises three fibre Bragg grating (FBG) strain sensors 102 provided within three optical fibres 14, 16, 18. The optical fibres 14, 16, 18 and the FBGs 102 are embedded within a pa... | 01/12/2010 |
| 7646946 | Intensity modulated fiber optic strain sensor A strain sensor includes an optical fiber with at least one optical fiber, a reflector body with a reflective surface, a housing affixed to the optical fiber probe and to the reflector body. The reflective surface is spaced apart at a distance d from the ends of the... | 01/12/2010 |
| 7639902 | Microwave photonic frequency domain reflectometer A plurality of microwave signals are converted into optical signals which are directed against an optically reflective surface, whereby the optical signals reflected off of the optically reflective surface are received and converted into microwave signals, which are... | 12/29/2009 |
| 7613367 | Optical sensor and modulator An optical device is presented for use in modulation of light and/or in sensing an external field, by at least partially, directly or indirectly exposing the device to the controllable or unknown external field. The device comprises a waveguide structure configured ... | 11/03/2009 |
| 7599582 | Optical fiber cable take-up mechanism for scanning sensors A scanning system includes a cable take-up mechanism that uses a series of pulleys that determine the bend diameters of a scanning system. The mechanism is particularly suited for a spectrometric, e.g., infrared, scanning system where moving scanner or sensor head e... | 10/06/2009 |
| 7590314 | Fiber optic sensor for tow wrap A system and method for detecting unwanted wrapping of one or more of a plurality of strips of material around a feed roller intended to urge the strips of material forward. During proper operation, the strips of material remain to a first side of the feed roller, b... | 09/15/2009 |
| 7587105 | High frequency ultrasound detection using polymer optical-ring resonator A polymer waveguide resonator device for high-frequency ultrasound detection having a optical resonator coupled to a straight optical waveguide which serves as input and output ports. Acoustic waves irradiating the waveguide induce strain modifying the waveguide cro... | 09/08/2009 |
| 7532781 | Fiber-optic mat sensor An optical sensor includes a support structure. An optical fiber has a plurality of bends arranged proximate the support structure. The optical fiber follows a circuitous path and is adapted to establish a detection zone. ... | 05/12/2009 |
| 7532780 | Method for locating and measuring deformations in a work of civil engineering A process for locating and measuring deformation in a civil engineering structure wherein at least one geosynthetic fabric (1) containing a plurality of optical fibers (2a to 2e) in parallel and capable of transmitting signals is a... | 05/12/2009 |
| 7512294 | Polymer based distributive waveguide sensor for pressure and shear measurement According to embodiments of the present invention, a distributed pressure and shear stress sensor includes a flexible substrate, such as PDMS, with a waveguide formed thereon. Along the waveguide path are several Bragg gratings. Each Bragg grating has a characterist... | 03/31/2009 |
| 7505643 | Apparatus and method for identification of optical cable In order to identify an optical cable for optical communication from a remote place, a Sagnac interferometer including two strands of an optical fiber is formed in the optical cable, and a worker in the remote place applies a disturbance of a popping sound to an opt... | 03/17/2009 |
| 7499606 | Method for measuring micro displacements A method for measuring micro displacements generally includes the steps of: (a) providing a micro displacement sensor with a first photonic crystal module with a number of first crystals, a second photonic crystal module with a number of second crystals, a laser, an... | 03/03/2009 |
