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| Number | Title | Issue Date |
| 8115473 | Optical voltage transformer An optical voltage transformer is connected with an external electric device and includes a primary electrode to which a measured voltage is applied by the external electric device, a first secondary electrode provided oppositely to the primary electrode, an insulat... | 02/14/2012 |
| 8004270 | Inspecting apparatus for photovoltaic devices The present invention provides an inspecting apparatus for photovoltaic devices which electrifies the photovoltaic devices in a forward direction thereof to make the photovoltaic devices emit electro-luminescence light and which has a simple-structured and cheap dar... | 08/23/2011 |
| 7923984 | Universal, wireless, nano-optical voltmeters A universal, wireless, nano-optical voltmeter comprises an organic core having at least one voltage-sensitive dye and at least one polymeric shell substantially surrounding the organic core. The nano-optical voltmeter can detect electric fields in cells. The nano-op... | 04/12/2011 |
| 7911196 | Optical voltage sensor A voltage sensor includes two optical sensing fibers and a control unit. The sensing fibers carry a first mode of light and a second mode of light, which are orthogonally polarized, with a birefringence between the two modes depending on the electric voltage to be m... | 03/22/2011 |
| 7893683 | Device, probe, and method for the galvanically decoupled transmission of a measuring signal The invention relates to a device, a probe, and a method for the galvanically decoupling transmission of a measuring signal. A microwave signal is supplied by a transceiver (1) to a sensor (3) by means of a galvanically decoupled waveguide (2). ... | 02/22/2011 |
| 7872468 | Optically measuring electric field intensities An apparatus includes an optical resonator and a passive optical device. The optical resonator has first and second optical reflectors and an optical cavity interposed between the reflectors. The optical resonator includes an electro-optically responsive material. O... | 01/18/2011 |
| 7839136 | System and method for testing radio frequency (RF) shielding defects An apparatus for testing a semiconductor device having an RF shield has a shield box. A test board is positioned in an interior of the shield box. A first surface of the test board has an area for attaching the semiconductor device. A shield device is attached to a ... | 11/23/2010 |
| 7786719 | Optical sensor, optical current sensor and optical voltage sensor A simple constitution together with an easy calibration of output by realizing a fast light intensity detection method is realized without using the carrier signal. An optical sensor, including: a sensor to which light from a light source is lead, and by whic... | 08/31/2010 |
| 7723977 | Optical sensor arrangement for electrical switchgear An optical sensor configuration contains an optical current sensor and/or an optical voltage sensor. The sensor configuration further contains a first and a second hollow member, preferably ring shaped profiles, which are together disposed to form a hollow section. ... | 05/25/2010 |
| 7692420 | Fiber-optic current sensor with polarimetric detection scheme The current in a conductor is measured by exploiting the Faraday effect in a sensing fiber. The light returning from the sensing fiber is split into at least two parts, at least one of which is analyzed by a first circular analyzer for generating a first signal. A s... | 04/06/2010 |
| 7646192 | Compensation of simple fibre optic Faraday effect sensors An electric current measurement device includes a housing defining first and second open ends sealed by first and second sealing means, respectively: a first optical fiber received in an aperture in the first sealing means and in optical communication with a first o... | 01/12/2010 |
| 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 Resolution] In a prior-art optical sensor fiber of reflection type, ... | 09/15/2009 |
| 7550961 | Systems and methods for evaluating electromagnetic interference Systems and methods for evaluating electromagnetic interference that may be employed, for among other things, to evaluate electronic system immunity to radiated electromagnetic fields and/or to identify particular electronic system areas that are susceptible to elec... | 06/23/2009 |
| 7548053 | Wide-band antenna coupled spectrometer using CMOS transistor To create a broad band spectrometer, a plurality of individual antenna based bolometers are fabricated on the surface of a single spectrometer chip, each bolometer having an individual antenna which is sized differently from all others, thus being responsive to a ge... | 06/16/2009 |
| 7443170 | Device and method for determining at least one variable associated with the electromagnetic radiation of an object being tested A device determines at least one characteristic of electromagnetic radiation emitted from a test object. A support receives the object. A network of probes is distributed along a substantially circular arc, and the support is disposed in a plane formed by the networ... | 10/28/2008 |
| 7425820 | High current measurement with temperature compensation A non-contact device for measuring current in a conductor. The device includes an interferometer with an optical fiber that extends around the conductor and through which light beams pass. The magnetic field around the conductor, caused by the current conducted thro... | 09/16/2008 |
| 7421212 | Detecting and locating pulses using a Bragg cell Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light b... | 09/02/2008 |
| 7373056 | High-voltage component with optical fiber and method for producing it A high-voltage component, having a first end and a second end, whereby the first end is on a high-voltage potential with respect to the second end. An insulating part, is arranged between the first end and the second end, and an optical fiber is integrated in the hi... | 05/13/2008 |
| 7372249 | Load measurement for a thermal microwave power sensor A thermocouple power sensor includes the ability to monitor the value of a RF load resistor. A meter connects to the input of a thermocouple-based RF signal power detector. The apparatus can sense its own load resistor DC impedance, so it can detect both aging in an... | 05/13/2008 |
| 7369290 | Modulator bias control Approaches to bias control are disclosed for an optical modulator that modulates an optical carrier with a data input signal. In one embodiment an electrical bias input signal provided to the modulator is adjusted based on a characteristic of the data input signal d... | 05/06/2008 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7366633 | Signal processing methods A process for extracting at least one variable associated with a periodic signal (S, S′) including a possible continuous component, a sinusoidal fundamental component and possible harmonics. Numerical samples of the periodic signal (S, S′) are formed and special... | 04/29/2008 |
| 7363401 | Method and apparatus for controlling bus transactions depending on bus clock frequency A method and apparatus is presented that can provide first and second windows for driving data onto a bus in dependence on bus clock frequency. In one example, the speed of the bus clock is determined by a component such as a processor. If the bus clock frequency is... | 04/22/2008 |
| 7357656 | Electrical energy disconnection device A disconnection device is designed to separate a first portion of an electrical circuit electrically from a second portion of said circuit, the disconnection device including: at least one pair of contacts, one of which contacts is a moving contact, the pair of cont... | 04/15/2008 |
| 7352339 | Diffuse illumination systems and methods The systems and methods disclosed herein relate to sources of diffuse illumination for providing substantially uniform illumination to a surface. The diffuse illumination arises from varying the diffusion angle of light generated by an LED system. To vary the diffus... | 04/01/2008 |
| 7348946 | Energy sensing light emitting diode display A display that includes energy sensors within the display itself is disclosed. An Organic Light Emitting Diode (OLED) can be made to operate both as a light emitter and as an energy detector. When forward biased with an appropriate driving signal, the OLED emits lig... | 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 |
| 7339363 | Variable gain received signal strength indicator An RSSI circuit provides a relatively inexpensive technique for accurately measuring received signal strength over a wide dynamic range. A received signal is processed by a rectifier circuit that generates a series of DC offsets of increasing magnitude. The DC offse... | 03/04/2008 |
| 7339735 | Polarization recovery system for projection displays A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally in... | 03/04/2008 |
| 7336062 | Optically measuring electric field intensities An apparatus includes an optical resonator and a passive optical device. The optical resonator has first and second optical reflectors and an optical cavity interposed between the reflectors. The optical resonator includes an electro-optically responsive material. O... | 02/26/2008 |
| 7336904 | Electro-magnetic interference reduction filter for an optical transceiver An optical transmit circuit that includes an electro-optic transducer driver and an electro-magnetic interference (“EMI”) reduction filter. The EMI reduction filter is coupled to an output terminal of the electro-optic transducer driver. This allows the EMI redu... | 02/26/2008 |
| 7330164 | Video controlled detector sensitivity A method for setting opto-sensor detection sensitivity in a projection video display comprising the steps of sequentially generating video signals of different colors for illuminating a sensor with video images of the video signals. In responsive to the video signal... | 02/12/2008 |
| 7330668 | Low noise light receiver The low noise light receiver comprises a light sensor for generating a sensor signal, the sensor signal comprising a wanted signal resulting from a light source and an interfering signal resulting from interfering light; an optical filter apparatus for reducing the ... | 02/12/2008 |
| 7315173 | Method of measuring electric field distribution and electric field distribution measuring instrument A method and apparatus for measuring an electric field distribution according to the present invention calculates a distribution of electric field intensity and its direction at arbitrary positions on the surface of the electronic apparatus or its circumference with... | 01/01/2008 |
| 7315255 | Load status indicator A load status indicator is disclosed wherein a green light-emitting diode of a bi-color light-emitting diode lights up when power is available to but not being used by a monitored device, whereas a red light-emitting diode of the bi-color light-emitting diode lights... | 01/01/2008 |
| 7315175 | Probe apparatus and method for examining a sample A probe for examining a sample (5), the probe including an emitter (1) for emitting radiation, a detector (1) for detecting radiation and a dielectric member (3) configured to direct radiation from the emitter (1) to the sample ( | 01/01/2008 |
| 7302366 | Measuring instrument A measuring instrument, in particular a flow or level meter, includes a base module for the acquisition and processing of measured data and an add-on module. Both the base module and the add-on module feature an optical interface interconnecting the base module and ... | 11/27/2007 |
| 7298128 | Method of detecting RF powder delivered to a load and complex impedance of the load Methods and systems of detecting one or more characteristics of a load are disclosed. One or more characteristics of a first signal may be detected at the output of a Radio Frequency (RF) power generator. The first signal may have a fundamental frequency. The one or... | 11/20/2007 |
| 7298134 | Electrical-energy meter adaptable for optical communication with various external devices An example embodiment of an electrical-energy meter comprises a transformer for producing an electrical output proportional to an electrical current in a conductor of electrical energy, a circuit board electrically coupled to the transformer for facilitating the cal... | 11/20/2007 |
| 7295581 | External cavity tunable optical transmitters External cavity optical transmitters are disclosed which include a gain chip and a mirror that define an optical cavity. The optical cavity may include collimating lenses, electro-optic crystals for controlled phase shift, and additional frequency selective optical ... | 11/13/2007 |
