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| Number | Title | Issue Date |
| 8183520 | Optical fiber shape sensor calibration Calibration methods and apparatuses for a shape sensing optical fiber are disclosed. Strain is sensed in an optical fiber that is associated with a kinematic chain, and information derived from the sensed strain is used to determine a calibration relationship betwee... | 05/22/2012 |
| 8153956 | Interrogator for a plurality of sensor fiber optic gratings including a masking compensation operation An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the sensor fiber optic gratings; at least one linear filter for converting chan... | 04/10/2012 |
| 8124926 | Key device and electronic device comprising the same The key device of the present invention is provided with: first light-emitting portions that emit light propagating in a first direction; second light-emitting portions that emit the light R propagating in a second direction; converters H that can convert a propagat... | 02/28/2012 |
| 8071934 | Method and system for detecting single-shot pulse contrast based on fiber array A system for detecting single-shot pulse contrast includes a correlator generating a correlation signal, a spectral filter filtering light signals having wavelengths different from the correlation signal, a fiber array comprising a plurality of fibers with different... | 12/06/2011 |
| 8003932 | Evaluating the position of a disturbance The present invention relates to a method of and apparatus for evaluating the position of a disturbance, in particular using a waveguide having a plurality of overlap regions. A position sensor is provided including: an optical waveguide; a transmission stage for la... | 08/23/2011 |
| 7994469 | Interrogator for a plurality of sensor fiber optic gratings having at least one filter for converting changes in peak reflection wavelength to changes in intensity An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the sensor fiber optic gratings; at least one linear filter for converting chan... | 08/09/2011 |
| 7947945 | Fiber optic sensing system, method of using such and sensor fiber An embodiment of a sensor fiber includes: at least two fiber sections with a plurality of holes; and at least one other fiber section situated between said at least two fiber sections, wherein the at least one other fiber sections being without the plurality of hole... | 05/24/2011 |
| 7923678 | Sensing method including interrogation of a holographic sensor A sensing method, which comprises subjecting a holographic sensor to an external physical interaction to which the sensor is sensitive, and observing a change in the holographic image. ... | 04/12/2011 |
| 7884314 | Light guide mechanism for guiding a light to an illuminance sensor A light guide mechanism for an illuminance sensor includes: a lighting window configured to pass through an external light; the illuminance sensor configured to detect an illuminance of the light passed through the lighting window; and a light-blocking part provided... | 02/08/2011 |
| 7872220 | Electronic fiber optic seal monitors The new seal monitor uses of a time dependant pseudo random number or a number from a time pad, which are lists of random numbers often used in encryption. This number changes periodically, for example, once an hour or whatever time interval is deemed timely by the ... | 01/18/2011 |
| 7800047 | Apparatus and method for a computerized fiber optic security system A computerized apparatus and method for detecting unauthorized activity in a protected area in real-time using a fiber optic cable having an optical sensor line, a fiber scanning unit, and a computer. Detecting unauthorized activity is done by scanning the sensor li... | 09/21/2010 |
| 7781724 | Fiber optic position and shape sensing device and method relating thereto The present invention is directed toward a fiber optic position and shape sensing device and the method of use. The device comprises an optical fiber means. The optical fiber means comprises either at least two single core optical fibers or a multicore optical fiber... | 08/24/2010 |
| 7755027 | Secure transmission cable having windings continuously laid in opposite directions The invention consists of a secure data transmission cable for electronically transmitting secure data between remote locations in an exposed condition. The data transmission cable comprises a tubular outer protective layer, an inner core disposed within the outer p... | 07/13/2010 |
| 7714271 | Simple fiber optic seismometer for harsh environments Disclosed is a sensor capable of measuring motion in a harsh environment. The sensor uses a fiber optic sensor element formed within a core of an optical fiber that is disposed within an enclosure made of a high strength, corrosion-resistant material. The optical fi... | 05/11/2010 |
| 7696471 | Impact detection system using an optical fiber sensor Disclosed is an impact detection system including: an optical fiber including a plurality of sensor sections to reflect light, a wavelength band of the reflected light vibrates depending on an elastic wave propagating through a subject to be inspected; a light sourc... | 04/13/2010 |
| 7687764 | Fiber optic sensors for composite pressure tanks with micro bend pinch points A low-cost fiber-optic sensor system for composite pressure tanks detects structural degradation of composite material pressure tanks. Light power attenuation in embedded optical fiber simulates tank volume change and replaces hydrostatic tank testing. Current U.S. ... | 03/30/2010 |
| 7683312 | Fiber-optic interrogator with normalization filters A fiber optic interrogator includes a broadband optical source, at least one beam splitter directing output of the optical source to an array of fiber optic gratings, at least one linear transmission or reflection filter, at least one optical receiver and at least o... | 03/23/2010 |
| 7671324 | Anti-tamper enclosure system comprising a photosensitive sensor and optical medium An anti-tamper enclosure system comprises an optical medium; at least one photosensitive sensor configured to measure at least one characteristic of a light wave transmitted in the optical medium; at least one logic circuit coupled to the at least one photosensitive... | 03/02/2010 |
| 7655900 | Intensity modulation type optical sensor and optical current/voltage sensor An influence on a sensor output is suppressed to a minimum degree even in the case when there is a ripple in a light source, thereby improving the measurement accuracy. In an intensity modulation type optical sensor, light from a light source 1 is guided to a... | 02/02/2010 |
| 7642504 | System and method for measuring forces Optical transducers are provided for detecting forces such as, rotation and transversal forces acting on them, wherein, for the purpose of detecting the forces, optical signals are transmitted through an optical path, for instance defined by an optical fiber. Moreov... | 01/05/2010 |
| 7633052 | Impact detection system with three or more optical fiber sensors Disclosed an impact detection system including: three or more optical fiber sensors disposed respectively in different positions, the sensors not being in alignment with one another, in which the sensors each includes a core portion to have a grating portion formed ... | 12/15/2009 |
| 7622706 | Sensor cable and multiplexed telemetry system for seismic cables having redundant/reversible optical connections An optical sensor cable includes at least one light source fiber extending substantially the entire length of the cable. A plurality of optical sensors are functionally coupled at an input thereof to the at least one light source fiber. At least one signal return fi... | 11/24/2009 |
| 7608812 | Tamper detection system A system and method for detecting radiation from a source in a container is disclosed. A continuous optical fiber path is disposed in a medium which is part of or associated with a container and which encloses the volumetric space of the container. The optical fiber... | 10/27/2009 |
| 7573021 | Method and apparatus for multiple scan rate swept wavelength laser-based optical sensor interrogation system with optical path length measurement capability The invention relates to optical sensor measurement methods that use a swept wavelength optical source to determine wavelength shift as well as to optical sensor systems that embody and employ these methods. A variable scan rate swept optical source is used to deter... | 08/11/2009 |
| 7557339 | Optical position sensor An optical positioning monitoring system is disclosed. The system has an optical sensing member disposed on a wellbore pipe, such as the tubing or production casing. When a tool comprising an actuating member acts on the optical sensing member, an optical signal is ... | 07/07/2009 |
| 7514670 | Distributed fiber optic sensor with location capability A spatially distributed sensor system has an optical transmitter, an optical conduit optically coupled to the optical transmitter at an input position, and a sensing element optically coupled to the optical conduit at a position along the optical conduit spatially s... | 04/07/2009 |
| 7504618 | Distributed sensing in an optical fiber using brillouin scattering To perform distributed sensing with an optical fiber using Brillouin scattering, a light pulse is transmitted into the optical fiber, where the transmitted light pulse has a first frequency. Backscattered light and optical local oscillator light are combined, where ... | 03/17/2009 |
| 7495207 | Optical sensor, optical temperature-measuring device and measuring method using the optical sensor An optical sensor has: a sensing portion having an optical fiber to be disposed at a measurement point of temperature, distortion, pressure etc.; a light source to output a light to the sensing portion; and a photodetector to detect a backscattered light from the se... | 02/24/2009 |
| 7488929 | Perimeter detection using fiber optic sensors A fiber optic perimeter detection system includes a receiver to receive output light signals from sensors positioned at different regions, each sensor including a sensing fiber. Each sensor generates an output light signal having a specified wavelength, the output l... | 02/10/2009 |
| 7470888 | Damage detection system A damage detection system including: a optical fiber sensor including a core portion to have a grating portion formed therein, the grating portion having gratings reflecting light, wherein a wavelength band of the reflected light changes when a distance between adja... | 12/30/2008 |
| 7446304 | Detection of collisions in medical procedures A method of detecting collisions between elements in a medical procedure such as between a magnet and another element in the procedure mounting on the medical device a flexible body within which is mounted one or more parallel side by side optical fibers arranged su... | 11/04/2008 |
| 7437028 | Multi-layered sensor A multi-layer sensor (10) and a use for the sensor (10) are described. This sensor is multi-layered in construction. 5 An optical wave guide (18) is passed through the sensor (10) such that in the event of an external application o... | 10/14/2008 |
| 7435944 | Microresonator-based high-performance high-pressure sensor and system An optically-powered integrated microstructure pressure sensing system for sensing pressure within a cavity. The pressure sensing system comprises a pressure sensor having an optical resonant structure subject to the pressure within the cavity and having physical pr... | 10/14/2008 |
| 7426322 | Plasmon photocatalysis Plasmons on a waveguide may deliver energy to photocatalyze a reaction. The waveguide or other energy carrier may be configured to carry electromagnetic energy and generate plasmon energy at one or more locations proximate to the waveguide, where the plasmon energy ... | 09/16/2008 |
| 7423257 | Signal transmission device and method for transfer of signals between two elements moving relative to one another using an optically-readable strip conductor In a signal transmission device as well as a method for transmission of signals between two elements moving relative to one another, in particular for transfer of measurement and/or control data between a rotating part and a stationary part of a computed tomography ... | 09/09/2008 |
| 7415212 | Data communication system, data transmitter and data receiver A transmitter formed of two or more light-emitting sections such as LEDs, which are physically arranged in a predetermined manner, is disposed in the real world object, and each light-emitting section transmits data by flashing at a flashing pattern representing the... | 08/19/2008 |
| 7411176 | Method and apparatus for examining corrosion of tendon embedded in concrete The present invention measures the strain caused by the shrink and expansion from the corrosion and examines the corrosion of a tendon for a long term with high sensitivity to improve the accuracy of the examination. ... | 08/12/2008 |
| 7406217 | Plasmon photocatalysis Plasmons on a waveguide may deliver energy to photocatalyze a reaction. The waveguide or other energy carrier may be configured to carry electromagnetic energy and generate plasmon energy at one or more locations proximate to the waveguide, where the plasmon energy ... | 07/29/2008 |
| 7406219 | Light-speed hitpoint sensor The present invention is directed to a hitpoint sensor for a surface of interest, the hitpoint sensor having an optical fiber which is wound around or otherwise covering the surface, and a data processor connected to the ends of the optical fiber. When a collision w... | 07/29/2008 |
| 7405391 | Modular sensor for damage detection, manufacturing method, and structural composite material A modular sensor for damage detection with an optical fiber (FBG sensor) to detect a damage of a composite material, having a high level of visibility and manageability, and its manufacturing method is described. A structural composite material embedded with this mo... | 07/29/2008 |
