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| Number | Title | Issue Date |
| 7808620 | Microchip testing device A testing device equipped with: a microchip having a receiver for a test fluid, a discharge lamp which emits light into the microchip test fluid receiver, a light source housing in which the discharge lamp is located, and an arithmetic calculation mechanism, which c... | 10/05/2010 |
| 7573565 | Methods and systems for determining the density and/or temperature of fluids Methods and systems are provided for determining the density and/or temperature of a fluid based on a reflection of optical energy directed at the fluid. ... | 08/11/2009 |
| 7435010 | High temperature light guide Disclosed is a method of forming an optical monitoring or transmitting light guide and a resulting apparatus that begins by bonding a bundle of optical fibers together using an epoxy and polishing the distal end of the bundle of optical fibers to create an optical a... | 10/14/2008 |
| 7360412 | Single point and fiber optic temperature measurement for correction of a gas column weight in a well Fluid column weight correction using discrete point and fiber optic temperature measurement. A method for determining pressure at a distal end of a fluid column in a well includes the steps of: dividing the fluid column into multiple segments; determining a temperat... | 04/22/2008 |
| 7355715 | Temperature measuring apparatus, temperature measurement method, temperature measurement system, control system and control method Light from a light source is split at a first splitter into a temperature measurement beam and a reference beam, the temperature measurement beam is further split at a second splitter into first through nth measurement beams, and the reference beam is reflected at a... | 04/08/2008 |
| 7350972 | Distributed temperature sensor using optical reflectometry A temperature sensing method in which pulses of optical radiation are launched by a laser diode (11) into an optical fibre (14) and optical radiation backscattered from the fibre is detected, the method comprising passing the backscattered radiation th... | 04/01/2008 |
| 7233442 | Method and apparatus for spectral-beam combining of high-power fiber lasers Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate p... | 06/19/2007 |
| 7215416 | Method for measuring using optical fiber distributed sensor Methods for calibrating and making measurements using fiber optic sensors are disclosed using backscattered wavelengths and independent sensors. The disclosure sets outs methods applicable with fiber optic sensors either in a deployed in a loop and in a linear confi... | 05/08/2007 |
| 7199924 | Apparatus and method for spectral-beam combining of high-power fiber lasers Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate p... | 04/03/2007 |
| 7173949 | Laser effects and laser devices A glass fiber (22) has a core (24) provided with Raman laser effect particles (28) embedded in a glass matrix (30), with glass cladding (26) around the core. The refractive index of the glass matrix (30) is matched to that o... | 02/06/2007 |
| 7142306 | Optical probes and probe systems for monitoring fluid flow in a well Several optical probes useful in downhole applications are provided. A first probe has a tip in the form of a cubical corner with the diagonal of the cubical corner aligned with the axis of the probe. A second probe has a tip formed in a 45° cone. In these designs,... | 11/28/2006 |
| 7140765 | Device and method for discrete and continuous measurement of the temperature of molten metal in a furnace or recepient for its production or treatment A device (10) for continuous measurement of the temperature of molten metal in a furnace or recipient for its production and treatment comprises a heat analysis instrument (14) placed in a lance (12) which blows inert gas and/or high-pressure co... | 11/28/2006 |
| 7124013 | Control device, control method, control unit, and engine control unit There are provided a control device, a control method, a control unit, and an engine control unit, which are capable of controlling a controlled object with relatively large phase delay and dead time, while attaining elimination of lag in control timing between the ... | 10/17/2006 |
| 7099535 | Small mode-field fiber lens A fiber lens includes a graded-index lens, a single-mode fiber disposed at a first end of the graded-index lens, and a refractive lens having a hyperbolic or near-hyperbolic shape disposed at a second end of the graded-index lens to focus a beam from the single-mode... | 08/29/2006 |
| 7091254 | Analytical instruments for monitoring photopolymerization An apparatus for continuously monitoring a photopolymerization reaction in real time by optical pyrometry includes a housing having a chamber; a sample mount that may be disposed within the chamber; a light source for supplying light to induce a photopolymerization ... | 08/15/2006 |
| 7082993 | Means and method for assessing the geometry of a subterranean fracture during or after a hydraulic fracturing treatment A method is given of fracturing a subterranean formation including the step of a) pumping at least one device actively transmitting data that provide information on the device position, and further comprising the step of assessing the fracture geometry based on the ... | 08/01/2006 |
| 7057714 | Method and system for measuring optical scattering characteristics A method and system for measuring optical scattering characteristics includes coupling a continuous wave laser excitation signal to an optical fiber. Radiation backscattered by the optical fiber in response to the coupled excitation signal is detected to produce a b... | 06/06/2006 |
| 7033073 | Device and method for measuring the temperature of an electric motor In order to determine the temperature in the winding region of an electric motor, especially linear motor, a measuring line made of uniform; electrically conductive material is integrated in a winding, preferably in sections between winding teeth. The measuring line... | 04/25/2006 |
| 7008103 | Method and apparatus for temperature sensing utilizing optical fiber A method and apparatus for sensing temperature using optical fiber is provided. In one embodiment, a method for sensing temperature using optical fiber includes launching a polarized optical signal having sufficient intensity to produce Brillouin scattering of the s... | 03/07/2006 |
| 6997256 | Use of fiber optics in deviated flows A system to determine the mixture of fluids in the deviated section of a wellbore comprising at least one distributed temperature sensor adapted to measure the temperature profile along at least two levels of a vertical axis of the deviated section. Each distributed... | 02/14/2006 |
| 6925372 | Control apparatus, control method, and engine control unit A control apparatus, a control method, and an engine control unit are provided for controlling an output of a controlled object which has a relatively large response delay and/or dead time to rapidly and accurately converge to a target value. When the output of the ... | 08/02/2005 |
| 6913079 | Method and system for monitoring smart structures utilizing distributed optical sensors A monitoring system and method for monitoring a predetermined set of physical characteristics associated with a structure using the monitoring system. The system is distributed in the structure and comprises a distributed optical sensing device (30), further ... | 07/05/2005 |
| 6910803 | Method and apparatus for temperature sensing utilizing Brillouin scattering in polarization maintaining optical fiber A method and apparatus for sensing temperature using optical fiber is provided. In one embodiment, a method for sensing temperature using optical fiber includes launching a polarized optical signal having sufficient intensity to produce Brillouin scattering of the s... | 06/28/2005 |
| 6843202 | Thermal processing apparatus for substrate employing photoirradiation A lamp house storing a plurality of flash lamps and a chamber storing and holding a semiconductor wafer are fitted to each other in an openable/closable manner. The lamp house and the chamber are fixed to a closed state with male screws. In order to process a semico... | 01/18/2005 |
| 6826954 | Method and apparatus for flow measurement A method and apparatus is disclosed for measuring the flow of fluid in the conduit, giving the example of oil in a well bore (12). A heat exchanger such as a cooling station (66) is placed in the well bore (12) and caused to create a slug of coo... | 12/07/2004 |
| 6811307 | DTS measurement of HV cable temperature profile A fiber optic cable is used as a distributed temperature sensing (DTS) transducer for temperature profile measurements in a protective underground duct in which a high voltage (HV) cable has already been laid. The sensing cable is not incorporated into the power cab... | 11/02/2004 |
| 6002501 | Method and apparatus for active tamper indicating device using optical time-domain reflectometry An optical time-domain reflectometer (OTDR) launches pulses of light into a link or a system of multiplexed links and records the waveform of pulses reflected by the seals in the link(s). If a seal is opened, the link of cables will become a discontinuous... | 12/14/1999 |
| 5930415 | Monitoring device for a gas-insulated cable A gas-insulated cable includes a plurality of sections separated by sealed partitions, each section including a cylindrical steel case, a cylindrical aluminum screen coaxial with and inside the case and three conductors. A monitoring device includes, betw... | 07/27/1999 |
| 5828797 | Fiber optic linked flame sensor A fiber optic linked flame sensor for continuous optical monitoring of the combustion process within the combustion chamber of a gas turbine engine. The system includes a high temperature optical probe, a fiber optic cable, and electro-optics module. The ... | 10/27/1998 |
| 5825804 | Temperature distribution measuring apparatus using an optical fiber A temperature distribution measuring apparatus and related method uses optical time domain reflectometry to determine temperature distribution along an optical fiber. A light pulse enters the fiber at one end, and backscattered light at each of various po... | 10/20/1998 |
| 5821861 | Monitoring wall temperatures of reactor vessels Wall temperatures of a reactor vessel are monitored by arranging an optical fibre in thermal contact with the wall and employing an optical time domain reflectometry system to monitor the respective temperatures at different points along the fibre. Such a... | 10/13/1998 |
| 5672008 | Reconfigurable multipoint temperature sensor A temperature sensor having a light fiber connecting a light source and a reflectometer. Temperature measurement zones are formed by sensing elements made of shape-memory alloy. The elements exert a stress on the fiber when they are subjected to an increa... | 09/30/1997 |
| 5639162 | Temperature distribution measuring apparatus using an optical fiber In a temperature distribution measuring apparatus which projects pulsed-light into an optical fiber, measures Raman spectrum of backscattered light occurred in the optical fiber, and obtains a temperature distribution along the optical fiber, to improve t... | 06/17/1997 |
| 5618108 | Temperature distribution measuring apparatus using an optical fiber An apparatus for measuring a temperature distribution along an optical fiber, comprises a light source for inputting pulsed-light into the optical fiber, an optical filter for receiving backward Raman-scattered light from the optical fiber and extracting ... | 04/08/1997 |
| 5608515 | Double window for protecting optical sensors from hazardous environments An optical sensor system includes a housing having an open end; first and second windows situated in the housing; a fastener for situating the first window closer to the open end than the second window and permitting an air exchange between a sensing regi... | 03/04/1997 |
| 5592282 | Suppression of stimulated scattering in optical time domain reflectometry Optical time domain reflectometry methods and apparatus are proposed in which the back-scattered optical radiation used to produce output signals is restricted to that resulting from Rayleigh scattering of light launched into a fiber 2 at a first waveleng... | 01/07/1997 |
| 5585914 | Apparatus and method for measuring a temperature of a high temperature liquid contained in a furnace An apparatus and method for measuring a temperature of a high temperature liquid contained in a furnace. An optical fiber covered with a metallic tube is inserted through a passageway inside a nozzle arranged on a furnace wall of the furnace. The nozzle c... | 12/17/1996 |
| 5568978 | Optical apparatus and method for measuring temperature of a substrate material with a temperature dependent band gap An optical method for measuring the temperature of a substrate material with a temperature dependent bandgap. The substrate is illuminated with a broad spectrum lamp and the bandgap is determined from the spectrum of the diffusely scattered light. The spe... | 10/29/1996 |
| 5564832 | Birefringent active fiber laser sensor A birefringent active fiber laser sensor includes one or more fiber lasers 12, 14, 16, each having a pair of Bragg gratings 18, 20, embedded in a fiber 10 and excited by a common pump light 30. At least one of the lasers 12, 14, 16 has a laser cavity wit ... | 10/15/1996 |
| 5539673 | Non-invasive infrared temperature sensor, system and method A high temperature, short time microwave heating system 10 for heat-sensitive liquid material to inactivate or reduce pathogenic agents or organisms, such as viral contaminants. The system 10 includes a disposable cartridge 26 consisting of a preheater 32... | 07/23/1996 |
