|
Match
|
Document |
Document Title |
|
|
8159216 |
Method and device for eddy current imaging for the detection and the characterisation of defects hidden in complex structures
This eddy current imaging method includes the steps of: positioning (72), in the vicinity of a large inspection region, elements for the measurement of a surface magnetic field,generating (74, 92)...
|
|
|
8138756 |
Microfiber magnetometer
A magnetometer includes a tapered microfiber having a curved portion, an excitation laser in optical communication with the tapered microfiber, and a nanocrystal attached to the curved portion of...
|
|
|
8125644 |
Magnetic field sensor with optically sensitive device and method for measuring a magnetic field
An optically sensitive device includes a material that changes dimension in response to a change in a magnetic field. In an embodiment, the optically sensitive device is configured to measure a...
|
|
|
8120355 |
Magnetic anomaly detector
A magnetic anomaly detector includes a magnetically active device which produces analog signals in response to magnetic fields. The analog signals are time quantized and then discrete-time...
|
|
|
8106653 |
Optical-magnetic Kerr effect waveform testing
System and methods are provided for optical-magnetic Kerr effect signal analysis. In one aspect, a test fixture is supplied having parallel conductive lines, with an input of a first line adjacent...
|
|
|
8058869 |
Fiber laser magnetic field sensor
The device includes two supports and a primary conductive strip. The primary conductive strip includes a neutral surface, a first side, and a second side. The primary conductive strip is connected...
|
|
|
7924493 |
Faraday rotator mirror and method for manufacturing the same
A Faraday rotator mirror which is compact, allows high workability of manufacturing and has high reliability and high coupling efficiency is provided. The Faraday rotator mirror comprises a...
|
|
|
7826065 |
Tuned optical cavity magnetometer
An atomic magnetometer is disclosed which utilizes an optical cavity formed from a grating and a mirror, with a vapor cell containing an alkali metal vapor located inside the optical cavity. Lasers...
|
|
|
7821259 |
Device and method for examining magnetic characteristics of objects
The invention concerns a device and a method for examining magnetic properties of objects, in particular of sheet material such as for example bank notes. Therein the invention proceeds from a...
|
|
|
7741840 |
Magnetic probe
A magnetic probe includes a tubular container, the inside of which can be observed and at least one end of which is closed, a paramagnetic seed which is fixed to an end of the tubular container,...
|
|
|
7656154 |
Magnetic field measurement system and optical pumping magnetometer
Provided is a highly accurate optical pumping magnetometer, in which a static magnetic field and an oscillating field to be applied to a vapor cell are stabilized. To this end, the optical pumping...
|
|
|
7589515 |
Method for reducing temperature-dependent error in photocurrent sensor, and photocurrent sensor device
[Problem] To permit reduction in the temperature dependence of a sensor, which is ascribable to the temperature dependence of the Verdet constant of a sensor fiber, at a low cost. [Means for...
|
|
|
7501816 |
Flaw detection method and flaw detection apparatus
A flaw detection apparatus includes a coil for producing an alternating-current magnetic field for flowing eddy currents in a magnetic material; a magneto-optical element disposed at the center of...
|
|
|
7468505 |
Fiber optic current sensor system and method for detecting lightning
A system for lightning detection is provided. The lightning detection system includes a conductor configured to receive a lightning strike and transmit a lightning induced current. The system also...
|
|
|
7417425 |
Continuous observation apparatus and method of magnetic flux distribution
A continuous observation apparatus of magnetic flux distribution in which a long sample containing a superconducting material or magnetic material is transferred to an observation position and...
|
|
|
7385393 |
Magnetic field measuring apparatus capable of measuring at high spatial resolution
A condenser lens is incorporated into the end portion of a magnetic field measuring apparatus including a magneto-optical crystal. Alternatively, the end portion of the magnetic field measuring...
|
|
|
7379523 |
Electromagnetic counter with built-in illumination means
An electromagnetic counter includes an electromagnetic counting mechanism in a frame, a plurality of number wheels at least one of which is configured to rotate through a predetermined angle in...
|
|
|
7365533 |
Magneto-optic remote sensor for angular rotation, linear displacements, and evaluation of surface deformations
A system and method to detect angular rotation, linear displacement and/or surface deformations is presented. The method is based on the ability of a linear polarized light to interact with...
|
|
|
7352172 |
Relative position detecting apparatus using magneto-resistors
The device according to the present invention comprises at least one magnetic field generating element, at least one magneto-resistor and at least one resistance-to-current converter generating a...
|
|
|
7286228 |
Method and apparatus for measuring circularly polarized rotating electromagnetic wave using magnetic field
A method and apparatus for measuring a circularly polarized rotating electromagnetic wave using a magnetic field are provided. The method and apparatus are used to measure properties of a...
|
|
|
7265845 |
Surface corrugation enhanced magneto-optical indicator film
A method of enhancing the conversion of magnetic field intensity and spatial data to optical data utilizes surface plasmon resonance combined with corrugated optical gratings of several types....
|
|
|
7183765 |
Micro-position sensor using faraday effect
A micro-position sensor and sensing system using the Faraday Effect. The sensor uses a permanent magnet to provide a magnetic field, and a magneto-optic material positioned in the magnetic field...
|
|
|
7173417 |
Eddy current sensor with concentric confocal distance sensor
A metrology instrument includes an eddy current sensor that is mounted to and concentric with a confocal distance sensor. By measuring the precise vertical placement of the eddy current probe with...
|
|
|
7166997 |
Complex transverse AC magneto-optic susceptometer for determination of volume and anisotropy field distribution in recording media
A method and apparatus for determining volume and anisotropy field distribution of thin film granular material includes the use of a magneto-optic probe, a lock-in amplifier, and a computer. The...
|
|
|
7084624 |
Magnetic sensor
The present invention provides a magnetic sensor capable of reproducing a magnetic record even if the size of a recorded magnetization is a minute one, directly reading a magnetization recorded on...
|
|
|
7075286 |
Fiber-optic current sensor
An optical current sensor having a reflection interferometer (1, 10) has, in its fiber-optic lead (2), a polarization-maintaining first fiber branch (20) for two forward-traveling orthogonally...
|
|
|
7071687 |
Photomagnetic field sensor
A photo magnetic field sensor includes a Faraday rotator made of a paramagnetic material, a polarizer, an analyzer, a light-irradiating element, and a light-sensing element. The Faraday rotator is...
|
|
|
7057792 |
Optical sensor unit for measuring current and voltage of high frequency
An optical sensor unit, free from electrical noise, includes a sensor case which has both lateral sides having high frequency connectors mounted thereon, and a metallic plate mounted inside the...
|
|
|
7042558 |
Eddy-optic sensor for object inspection
A sensor enables simultaneous or sequential eddy current and optical reflectance measurements of conducting film by providing an eddy current inspection coil and a first and a second optical fiber...
|
|
|
6972562 |
Near-field magneto-optical microscope
A device and method for mapping magnetic fields of a sample at a resolution less than the wavelength of light without altering the magnetic field of the sample is disclosed. A device having a...
|
|
|
6927571 |
Apparatus for examining properties of objects
The invention relates to apparatus for examining magnetic properties of objects, in particular sheet material, such as bank notes (20). The apparatus comprises a magneto-optic layer (10) whose...
|
|
|
6859510 |
Electromagnetic counter with built-in illumination device
An electromagnetic counter includes a case, an electromagnet, an anchor rotatable through magnetization and demagnetization of the electromagnet, and number wheels rotated by a predetermined angle...
|
|
|
6812696 |
Apparatus and methods using mechanical resonators to enhance sensitivity in lorentz force magnetometers
A Lorentz Force magnetometer based on a mechanical resonator including a resonant, vibrating electrically conducting string or insulating fiber coated with an electrically conducting material and...
|
|
|
6806704 |
Devices and methods for investigating the magnetic properties of objects
The invention relates to apparatuses and a corresponding method for examining magnetic properties of objects, in particular sheet material, such as bank notes (20). The apparatuses comprise a...
|
|
|
6788051 |
Method and system of spectroscopic measurement of magnetic fields
There is disclosed a method and apparatus for spectroscopically sensing a man-made, terrestrial or atmospheric magnetic field emanating from an object that includes receiving a radiance emission...
|
|
|
6756781 |
Sensor for optically measuring magnetic fields
Described are improved transmissive magneto-optical sensors that may be used to determine the magnitude and phase of a magnetic field surrounding a conductor, and when in contact with the...
|
|
|
6717713 |
Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
An apparatus which attenuates a light signal polarized in a first direction. The apparatus includes a polarization rotation unit and an output unit. The polarization rotation unit rotates the...
|
|
|
6714007 |
Optically powered resonant integrated microstructure magnetic field gradient sensor
A device 10 for sensing a magnetic field gradient using an optically powered resonant integrated microstructure (O-RIMS). The O-RIMS comprises a microbeam 11 having a resonant frequency, a shell 16...
|
|
|
6690001 |
THz pulse measurement with an optical streak camera
A method and apparatus for measuring electromagnetic pulses as a function of time. Radiation measurement, including measurement of single-shot, free-space terahertz femtosecond pulses, is realized...
|
|
|
6674281 |
Method for measuring magnetic field based on electro-optic probing technique and measuring electric field based on magnetic probing technique
The present invention provides a method for measuring both magnetic and electric fields of a DUT via an electro-optic probing technique at the same time. Also, the present invention provides a...
|
|
|
6670810 |
System and method for distributed monitoring of surroundings using telemetry of data from remote sensors
A system and method for gathering and analyzing data captured from one or more remote sensing units positioned in the field. Remote sensing units preferably utilize optical sensors. Power to...
|
|
|
6646777 |
Optical isolator with improved mounting characteristics
An optical isolator includes a first magnetic polar source having a first magnet axis, a second magnetic polar source having a second magnet axis parallel to the first magnet axis, and an optical...
|
|
|
6639403 |
System and method for sensing magnetic fields based on movement
A method and system for sensing magnetic fields using an AC current carrying wire which vibrates or moves in the presence of a magnetic field. The system uses the wire movement to determine one or...
|
|
|
6630819 |
Magneto-optic current sensor
An optical current transducer configured to sense current in the conductor is disclosed. The optical current transducer includes a light source and a polarizer that generates linearly polarized...
|
|
|
6594068 |
High switching speed digital faraday rotator device and optical switches containing the same
In all-optical networks, high speed optical switching and routing becomes one of the most important issues for interconnecting the transport network layers. This invention describes novel...
|
|
|
6593739 |
Apparatus and method for measuring magnetization of surfaces
An optical apparatus and methods for efficiently determining the magnetization of a material at very high optical resolution are disclosed. Individual components of the magnetization may be...
|
|
|
6573700 |
Method of characterizing free-space radiation using a chirped optical pulse
Characterization of free-space electromagnetic energy pulses (15) using a chirped optical probe beam is provided. An electro-optic or magneto-optic crystal (14) is positioned such that the...
|
|
|
6534977 |
Methods and apparatus for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets
Described are the design of a rare earth iron garnet sensor element, optical methods of interrogating the sensor element, methods of coupling the optical sensor element to a waveguide, and an...
|
|
|
6528993 |
Magneto-optical microscope magnetometer
A magneto-optical microscope magnetometer capable of simultaneously measuring a hysteresis loop and activation magnetic moment of a submicrometer-scale local area (about 0.3×0.3 μm). An e...
|
|
|
6515467 |
Method and system for optically detecting an electric current by means of light signals having different wavelengths
The method and system serve to optically detecting an electric current with an extended measurement range. To that end, two light signals having different wavelengths pass through a Faraday...
|