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| Number | Title | Issue Date |
| 7772541 | Fiber optic position and/or shape sensing based on rayleigh scatter A fiber optic position and/or shape sensing device includes an optical fiber with either two or more single core optical fibers or a multi-core optical fiber having two or more fiber cores. In either case, the fiber cores are spaced apart so that mode coupling betwe... | 08/10/2010 |
| 7560685 | Spectrally stabilized broadband optical source Methods and apparatus enable compensation of source light wavelength fluctuations due to instability of a broadband source within an optical sensing system. Tapping off two or more portions of the light output from the source at specific wavelength bands enables pow... | 07/14/2009 |
| 7425696 | Photoelectric oscillator A photoelectric oscillator includes a laser beam projection unit; an optical modulator on an optical path extending from the projection unit, which optical modulator outputs a modulated signal or an optical signal containing a harmonic of the modulated signal and in... | 09/16/2008 |
| 7411177 | Multi-spectrum image capturing device and multi-spectrum illuminating device A multi-spectrum image capturing device includes a multi-spectrum illuminating device comprising LED's for emitting lights of different wavelengths from one another, a plurality of optical rods for relaying the lights emitted from the LED's, an optical diffusion ele... | 08/12/2008 |
| 7394953 | Configurable integrated optical combiners and decombiners System, devices and methods are described that provide an integrated optical decombiner or optical combiner having both unamplified paths and amplified paths on which power monitoring and control may be located. A preferred multiplexing/demultiplexing optical path t... | 07/01/2008 |
| 7385177 | Light guide rotation rate detector with coupled optical resonators A method and device are presented for use in determining a rate of rotation of an object. The device comprises a light guide comprising an arrangement of a plurality of coupled optical resonators arranged along a curvilinear optical path. This allows for determining... | 06/10/2008 |
| 7366426 | Optical add/drop multiplexer using tunable filter and method for feedback controlling the tunable filter A wavelength stabilizing filter has a wavelength transmission characteristic curve that has its peak in a wavelength located between a first continuous set band and a second continuous set band longer in wavelength than the first set band, and that linearly drops fr... | 04/29/2008 |
| 7362499 | Optical amplifier with pump light source control for Raman amplification A Raman amplifier for amplifying a wavelength division multiplexed (WDM) light including signal lights wavelength division multiplexed together. The amplifier includes an optical amplifying medium and a controller. The optical amplifying medium uses Raman amplificat... | 04/22/2008 |
| 7355726 | Linear variable reflector sensor and signal processor Linear variable reflector sensors can be used to measure the displacement of objects. These sensors are useful in that they can be very small, do not conduct electricity, and are resistant to electrical interference from EMI/EMP and lightning strikes. The present li... | 04/08/2008 |
| 7355163 | Direct measurement of Brillouin frequency in distributed optical sensing systems An optical sensing system uses light scattered from a sensing fibre to sense conditions along the fibre, and has a receiver with a frequency to amplitude converter to obtain a frequency of a Brillouin component of the received scattered light, to deduce the conditio... | 04/08/2008 |
| 7349591 | Pressure compensated optical accelerometer, optical inclinometer and seismic sensor system An optical accelerometer includes means for changing the length of at least one optical fiber in response to acceleration functionally coupled to the at least one optical fiber. The fiber and the means for changing length are enclosed in a pressure compensated housi... | 03/25/2008 |
| 7348541 | Optical channel monitoring system with simultaneous C-band and L-band detection A monitoring system has the capability to monitor multiple signal bands simultaneously. Specifically, in one embodiment, the monitoring system can simultaneously monitor the C- and L-bands. As a result, the time to scan through the spectral band can be reduced by ha... | 03/25/2008 |
| 7340114 | Optical waveguide device and optical modulator An optical waveguide device includes a substrate having an electro-optical effect, an optical waveguide formed on the substrate, an electrode provided for the optical waveguide, a monitoring optical waveguide for guiding part of light outputted from the optical wave... | 03/04/2008 |
| 7336358 | Method and apparatus for determining particle size and composition of mixtures Method and apparatus for evaluating one or more materials in accordance with size of particles. The method includes evaluating a spectrum of light reflected from a first group of particles; evaluating a spectrum of light reflected from a second group of particle; co... | 02/26/2008 |
| 7333680 | Fiber Bragg grating sensor system The present invention discloses a fiber Bragg grating sensor system. The system according to the present invention comprises a wavelength tunable laser; a coupler for splitting output light from the wavelength tunable laser into two directions; a reference wavelengt... | 02/19/2008 |
| 7332353 | Method for detecting analyte(s) using magnetic colloidal particles The invention concerns a method for detecting and/or quantifying at least an analyte in a liquid medium, characterized in that it consists in using magnetic colloidal particles functionalized at the surface with at least a ligand specific of the analyte to be detect... | 02/19/2008 |
| 7329852 | Automatic background removal for input data having consecutive input points identification Automatic background signal removal for input data, such as for spectrometry data, is provided. Input data includes input pixel points, such as those read by a CCD spectrometer or chromatography device, and intensity values corresponding to the data points. A distri... | 02/12/2008 |
| 7326917 | Wear monitor for turbo-machine A wear determination device for determining vibration in a turbine engine component to reduce wear in a turbine engine. The wear determination device may be capable of measuring vibrations in a turbine engine component. The vibration measurement may be used to deter... | 02/05/2008 |
| 7324758 | Optical dispersion monitoring apparatus and optical dispersion monitoring method, and optical transmission system using same An optical dispersion monitoring apparatus and an optical dispersion monitoring method are capable of monitoring dispersion accurately with a simple construction in an optical transmission system using the same. To this end, the optical dispersion monitoring apparat... | 01/29/2008 |
| 7315162 | Reducing power consumption of electrical meters The invention contemplates an electrical power meter and method of operating the electrical power meter. The inventive power meter includes a power supply for converting alternating current (AC) voltage to a direct current (DC) voltage for powering the electronic co... | 01/01/2008 |
| 7315667 | Propagating light to be sensed Light to be sensed is spreaded across an entry surface of a transmission structure with a laterally varying energy transmission function. For example, the light could be output from a stimulus-wavelength converter, provided through an optical fiber, or it could come... | 01/01/2008 |
| 7291504 | Assay involving detection and identification with encoded particles A method and apparatus for the manipulation of colloidal particles and biomolecules at the interface between an insulating electrode such as silicon oxide and an electrolyte solution. Light-controlled electrokinetic assembly of particles near surfaces relies on the ... | 11/06/2007 |
| 7283572 | Measurement of wavelength transients in tunable lasers A high resolution measurement method and apparatus for tracking wavelength transients in tunable lasers. The apparatus comprises a Mach-Zehnder interferometer (MZI) which is used to generate a self-heterodyne signal between the wavelength transient to be measured, w... | 10/16/2007 |
| 7274455 | Optical detection apparatus for multi-channel multi-color measurement and multi-channel sample analyzer employing the same Provided are an optical detection apparatus which can measure multi-channel samples at high speed and various wavelengths using an optical detector and a multi-channel sample analyzer employing the same. The optical detection apparatus includes an optical detector; ... | 09/25/2007 |
| 7268342 | Determination of optical properties of a device under test in both directions in transmission and in reflection A method and a measurement setup for determination of optical properties of a device under test in both directions in transmission and in reflection, includes a coding device distinguishably coding at least two parts of a provided measurement signal, feeding element... | 09/11/2007 |
| 7262921 | Illuminating optical system for endoscope An endoscope illuminating optical system having a gradient index lens capable of illuminating by a sufficient light amount and by a wider angle is provided. The endoscope illuminating optical system is constituted to illuminate an observed region by light guided by ... | 08/28/2007 |
| 7254503 | Light source wavelength correction A wavelength correction function provides corrected reflectance values from actual reflectance values taken in a reflectance-base instrument. The correction is provided as a function of measured reflectance values and a predefined set of high resolution reflectance ... | 08/07/2007 |
| 7234410 | Buoyancy control systems for tubes A buoyancy control system for controlling the buoyancy of a tube may includes generally tubular length of buoyancy control material having a selected buoyancy characteristic. The length of buoyancy control material may be attached to a section of the length of the t... | 06/26/2007 |
| 7230228 | Tunable temporal dispersion and compensated angular dispersion in optical switching systems Methods for utilizing optical systems in order to introduce digitally tunable amounts of temporal dispersion into optical signals and methods and systems for providing angular dispersion compensated output from optical switching/routing systems. ... | 06/12/2007 |
| 7209605 | Packaged optical sensors on the side of optical fibers The present invention concerns an optical sensor located on a preferred azimuthal portion of the side of an optical fiber. An optical fiber having two opposite ends, a core and a cladding and at least one sensing area is disclosed. Each of the sensing areas is locat... | 04/24/2007 |
| 7208722 | Measuring method and measuring apparatus for coherent crosstalk light An apparatus for measuring coherent crosstalk (CXT) light of the invention generates in a light source section, measurement light which has been modulated to a sawtooth wave shape and applies this to an object of measurement; sends transmission light and CXT light e... | 04/24/2007 |
| 7206516 | Apparatus and method for measuring the dispersion of a fiber span The invention pertains to optical fiber transmission systems, and is particularly relevant to transmission of large volumes of data over long distances at high rates. An improved apparatus and method for measuring dispersion in a fiber span is disclosed. In particul... | 04/17/2007 |
| 7186967 | Optical transducer having optical fibers resiliently warped near optical devices and musical instrument using the same An optical transducer includes a light emitting unit, a light detecting unit, light radiating sensor heads and light receiving sensor heads; the light radiating sensor heads and light receiving sensor heads are alternately arranged at intervals, and moving objects p... | 03/06/2007 |
| 7177025 | Measuring specular reflectance of a sample Apparatus (10) for measuring absolute specular reflectance of a surface of a sample (22) includes a sample holder (12), a light source (18) for transmitting an incident light beam (16) onto a surface of the sample (22) and a... | 02/13/2007 |
| 7176671 | Current measuring device A current measuring apparatus comprises a current detection unit 10 and a photoelectric converter 20. The current detection unit 10 comprises an optical fiber sensor 11 extended or looped around a conductor 30. A reflective film | 02/13/2007 |
| 7157693 | Optical wavelength interrogator An optical wavelength readout system for application in optical sensing systems is disclosed. The system includes a Master unit including a wavelength swept optical source for launching light into a string of optical sensors, and a detection and processing unit for ... | 01/02/2007 |
| 7152632 | Systems and methods for pipeline rehabilitation The present disclosure is directed to methods and systems for pipeline rehabilitation. The methods and systems disclosed herein permit the rehabilitation of long lengths of previously installed pipe and minimize the need for creating multiple access points to the pi... | 12/26/2006 |
| 7144119 | System and method for programmable illumination pattern generation An apparatus providing programmable illumination pattern generation for the manipulation of colloidal particulates and biomolecules in suspension between electrodes, is disclosed. The apparatus implements LEAPS (Light-controlled electrokinetic assembly of particles ... | 12/05/2006 |
| 7141815 | Fiber optic-based probe for use in saltwater and similarly conductive media as found in unenclosed natural environments Arrays of optical fibers connected to specially configured electronics, e.g., a phototransistor, an LED, an amplifier, a detector, and display, software and PCMCIA A/D board available on a personal computer, are used to obtain continuous real-time acquisition, proce... | 11/28/2006 |
| 7137299 | Fiber optic accelerometer A proof mass is suspended in a cavity in a housing. The proof mass moves along a sensing axis in response to linear acceleration. Elastic support members are connected between the proof mass and the housing and are arranged to exert a reaction force on the proof mas... | 11/21/2006 |
