Patent application number | Description | Published |
20100085992 | Arbitrary Optical Waveform Generation Utilizing Optical Phase-Locked Loops - This invention relates to opto-electronic systems using semiconductor lasers driven by optical phase-locked loops that control the laser's optical phase and frequency. Feedback control provides a means for precise, wideband control of optical frequency and phase, augmented further by four wave mixing stages and digitally stitched independent optical waveforms for enhanced tunability. | 04-08-2010 |
20120156802 | SWEPT-FREQUENCY SEMICONDUCTOR LASER COUPLED TO MICROFABRICATED BIOMOLECULAR SENSOR AND METHODS RELATED THERETO - An optoelectronic swept-frequency semiconductor laser coupled to a microfabricated optical biomolecular sensor with integrated resonator and waveguide and methods related thereto are described. Biomolecular sensors with optical resonator microfabricated with integrated waveguide operation can be in a microfluidic flow cell. | 06-21-2012 |
20120262721 | Arbitrary Optical Waveform Generation Utilizing Optical Phase-Locked Loops - This invention relates to opto-electronic systems using semiconductor lasers driven by optical phase-locked loops that control the laser's optical phase and frequency. Feedback control provides a means for precise, wideband control of optical frequency and phase, augmented further by four wave mixing stages and digitally stitched independent optical waveforms for enhanced tunability. | 10-18-2012 |
20140104593 | THREE-DIMENSIONAL TOMOGRAPHIC IMAGING CAMERA BASED ON COMPRESSIVE SENSING - A detection apparatus and method for FMCW LIDAR employ signals that are modified so that low-cost and low-speed photodetector arrays, such as CCD or CMOS cameras, can be employed for range detection. The LIDAR is designed to measure the range to one or more targets and includes a single mode swept frequency laser (SFL), whose optical frequency is varied with time, as a result of which, a target beam which is reflected back by the one or more targets is shifted in frequency from a reference beam by an amount that is proportional to the relative range to the one or more targets. The reflected target beam(s) is/are combined with the reference beam and detected by the photodetector array. In the case of a sparse number of targets to be detected, Compressive Sensing (CS) techniques can be employed by a processor to reduce the number of measurements necessary to determine the range of each target. | 04-17-2014 |
Patent application number | Description | Published |
20100201374 | High speed detection of shunt defects in photovoltaic and optoelectronic devices - The current invention provides a shunt defect detection device that includes a device under test (DUT) that is fixedly held by a thermally isolating mount, a power source disposed to provide a directional bias condition to the DUT, a probe disposed to provide a localized power to the DUT from the power source, an emission detector disposed to measure a temporal emission from the DUT when in the directional bias condition, where the measured temporal emission is output as temporal data from the emission detector to a suitably programmed computer that uses the temporal data to determine a heating rate of the DUT and is disposed to estimate an overheat risk level of the DUT, where an output from the computer designates the DUT a pass status, an uncertain status, a fail status or a process to bin status according to the overheat risk level. | 08-12-2010 |
20100219327 | High speed quantum efficiency measurement apparatus utilizing solid state lightsource - The present invention provides a high-speed Quantum Efficiency (QE) measurement device that includes at least one device under test (DUT), at least one conditioned light source with a less than 50 nm bandwidth, where a portion of the conditioned light source is monitored. Delivery optics are provided to direct the conditioned light to the DUT, a controller drives the conditioned light source in a time dependent operation, and at least one reflectance measurement assembly receives a portion of the conditioned light reflected from the DUT. A time-resolved measurement device includes a current measurement device and/or a voltage measurement device disposed to resolve a current and/or voltage generated in the DUT by each conditioned light source, where a sufficiently programmed computer determines and outputs a QE value for each DUT according to an incident intensity of at least one wavelength of from the conditioned light source and the time-resolved measurement. | 09-02-2010 |
20150084664 | Methods and Systems for Characterizing Photovoltaic Cell and Module Performance at Various Stages in the Manufacturing Process - A method of quantum efficiency (QE) photovoltaic measurement is provided that includes coupling measurement electronics to a p-n junction of a Cell Under Test (CUT) that are capable of measuring a pulsed DC photocurrent. The measurement electronics output a response by the CUT to turning on and turning off the pulsed DC photocurrent that are digitized and analyzed for the magnitude that is representative of a conversion efficiency of the CUT to a wavelength of the DC photocurrent, where a measured decay time represents the p-n junction or the minority carrier lifetime. The CUT is exposed to the pulsed DC photocurrent, where signatures of the response to turning off and on to the pulsed DC photocurrent overlap, where a combined amplitude of the response is proportional to an efficiency of a production of photocarriers, where a value of a spectral response at a wavelength is determined. | 03-26-2015 |
Patent application number | Description | Published |
20140197324 | METHODS TO ENHANCE NUCLEAR SPECTROSCOPY ANALYSIS - Methods, systems and devices for estimating a parameter of interest from a gamma ray spectrum relating to a volume of matter using standard gamma ray spectra from reference samples, wherein there is at least one non-elemental characteristic that is different between the volume and at least one of the reference samples, wherein the non-elemental characteristic difference affects gamma ray interactions. Methods may include deconvolving a gamma ray spectrum obtained from the analysis volume into a plurality of elemental spectral yields, wherein deconvolution includes compensating for effects of the non-elemental characteristic difference. Methods may include using at least one compensation standard spectrum configured to compensate for the effects of the non-elemental characteristic of the at least one of the reference samples. | 07-17-2014 |
20140367562 | THERMAL AND EPITHERMAL NEUTRONS FROM AN EARTH FORMATION - An apparatus and method for detecting radiation in a borehole intersecting an earth formation. The apparatus may include a neutron sensitive scintillation media and at least one optically transparent neutron absorptive material optically coupled to the media, which may be positioned to prevent incident neutrons from reaching a neutron-shaded surface of the media, and to provide directional sensitivity. The neutron absorptive material may comprise a light guide optically coupled to the neutron sensitive scintillation media. The scintillation media may be disposed within the at least one optically transparent neutron absorptive material, which may be configured to prevent substantially all incident neutrons having an incident neutron energy below a selected energy threshold from reaching the media. The selected energy threshold may be approximately 0.2 eV. A neutron-reflecting material may be disposed within the scintillation media. The neutron-reflecting material may comprise a light guide optically coupled to the neutron sensitive scintillation media. | 12-18-2014 |
20150076335 | COMPOSITE HIGH TEMPERATURE GAMMA RAY DETECTION MATERIAL FOR WELL LOGGING APPLICATIONS - An apparatus for detecting a gamma-ray includes: a gamma-ray detection material comprising a material transparent to light having a plurality of nano-crystallites where each nano-crystallite in the plurality has as periodic crystal structure with a diameter or dimension that is less than 1000 nm and includes (i) a heavy atom having an atomic number greater than or equal to 55 that emits an energetic electron upon interacting with an incoming gamma-ray and (ii) and an activator atom that provides for scintillation upon interacting with the energetic electron to emit light photons wherein the heavy atom and the activator atom have positions in the periodic crystal structure of each nano-crystallite in the plurality; and a photodetector optically coupled to the gamma-ray detection material and configured to detect the light photons emitted from the scintillation and to provide a signal correlated to the detected light photons. | 03-19-2015 |
20150129754 | Measurement of Downhole Gamma Radiation by Reduction of Compton Scattering - Systems, methods and devices for evaluating an earth formation intersected by a borehole. The method includes using a first radiation responsive component to detect gamma rays having an energy below a threshold energy; using a second radiation responsive component configured to detect gamma rays that traverse the first radiation responsive component; generating a reduced-Compton gamma ray spectrum by generating an anticoincidence gamma ray spectrum indicative of the gamma rays detected by the first radiation responsive component and the gamma rays detected by the second radiation responsive component. The anticoincidence gamma ray spectrum represents those gamma rays of the gamma rays detected by the second radiation responsive component that are not detected in coincidence with the gamma rays detected by the first radiation responsive component. | 05-14-2015 |
20150323683 | NEUTRON AND GAMMA SENSITIVE FIBER SCINTILLATORS - One general embodiment according to the present disclosure may be formation evaluation tool for detecting radiation in a borehole in a volume of an earth formation. The tool may include a detector including a monolithic scintillation element comprising a coherent assemblage of joined fibers, wherein the fibers are made of an optically transparent scintillation media. The fibers may be at least one of i) gamma ray responsive; and ii) neutron responsive. The coherent assemblage of fibers may be a continuous mass, may be heat-joined. The fibers may be solid. The scintillation media may comprise at least one of i) organic crystalline scintillation materials, ii) amorphous glass, and iii) nanostructured glass ceramics. The coherent assemblage of fibers may be asymmetric. The coherent assemblage of fibers may surround a further scintillation media having different scintillation characteristics than the scintillation media. The scintillation element may be azimuthally sensitive. | 11-12-2015 |
20150346382 | MEASUREMENT TECHNIQUE UTILIZING NOVEL RADIATION DETECTORS IN AND NEAR PULSED NEUTRON GENERATOR TUBES FOR WELL LOGGING APPLICATIONS USING SOLID STATE MATERIALS - An apparatus for estimating a property of an earth formation includes a pulsed neutron generator configured to emit a pulse of neutrons, a formation radiation detector configured to detect radiation emitted from the formation due to interactions with the pulse of neutrons, and a neutron generator radiation detector having a crystal structure and configured to detect a radiation particle emitted from the pulsed neutron generator and to provide a location within the neutron radiation detector at which the particle was detected. The crystal structure includes a plurality of detection cells, each detection cell having at least two electrically conducting columns with an applied potential difference such that electrons generated in the crystal structure by interaction with the radiation particle are collected by at least one of the electrically conducting columns to provide detection locations. A processor estimates the property using the detected formation radiation and the detection locations. | 12-03-2015 |
Patent application number | Description | Published |
20090201959 | Wavelength and Intensity Monitoring of Optical Cavity - According to various illustrative embodiments, a device, method, and system for measuring optical fine structure of lateral modes of an optical cavity are described. In one aspect, the device comprises at least one photodetector arranged to detect an output of the optical cavity in a lateral direction thereof. The device also comprises an analyzer coupled to an output of the at least one photodetector and arranged to analyze at least a portion of signals produced in the at least one photodetector by at least a portion of the lateral modes of the optical cavity. The device also comprises a processor arranged to determine the optical fine structure of the at least the portion of the lateral modes of the optical cavity based on an output of the analyzer. | 08-13-2009 |
20110164879 | Compact Multi-Port Optical Signal Processor - In a method and system to fabricate a compact optical device, a periodic group-delay device (PGDD) includes N optical input ports, N being a positive integer number, each port being configured to include one or more wavelength-division- multiplexing (WDM) channels; N corresponding optical output ports, each port being configured to include one or more WDM channels. The PGDD also includes a first slab waveguide region (FSWR) coupled to the N optical input ports, a second slab waveguide region (SSWR) coupled to the said N optical output ports, a first optical grating coupled to the FSWR, a second optical grating coupled to the SSWR, and; a third slab waveguide region (TSWR) coupled to at least one of the first and second optical gratings. The TSWR is configured to provide a configurable amount of dispersion to the N optical output ports. Optical signals carried by each WDM channel are processed concurrently and independently. | 07-07-2011 |
Patent application number | Description | Published |
20080316096 | Method of Cross-Correlation and Continuous Wave Interference Suppression for GPS Signal and Associated GPS Receiver - A method for processing weak indoor signals in presence of cross-correlation or continuous wave interference and associated GPS receiver are provided. The method comprises providing a two-dimensional delay-Doppler accumulated power pattern comprising a plurality of accumulated powers corresponding to frequency and time; for a predetermined frequency, determining a partial average power value of accumulated powers of the two-dimensional delay-Doppler accumulated power pattern over a plurality of time points; and subtracting the partial average power value from the accumulated powers to generate a modified delay-Doppler accumulated power pattern with suppressed interference effect. | 12-25-2008 |
20090262018 | High Accuracy Satellite Receiving Controller and Associated Method - A high accuracy satellite signal receiving controller and associated method is provided. The high accuracy satellite signal receiving controller includes a frequency synthesizer, and an analog-to-digital converter (ADC), a Global Positioning System (GPS) receiving module and a control unit. The frequency synthesizer, coupled to an external non-temperature-compensated crystal oscillator (non-TXCO), generates an oscillating frequency signal to the GPS receiving module. The ADC converts an analog temperature signal into a digital temperature signal. The control unit, coupled to the ADC, adaptively updates temperature/frequency offset data. | 10-22-2009 |
20110181464 | Method of Position Determination in a Global Navigation Satellite System (GNSS) Receiver - A method of determining coordinates of a mobile Global Navigation Satellite System (GNSS) receiver includes processing signals from space vehicles including performing measurements of pseudoranges and Doppler shift, extracting ephemeris data, and determining GNSS receiver coordinates from said measurements. | 07-28-2011 |
Patent application number | Description | Published |
20130226209 | MINIATURE SHREDDING TOOL FOR USE IN MEDICAL APPLICATIONS AND METHODS FOR MAKING - The present invention relates generally to the field of micro-scale or millimeter scale devices and to the use of multi-layer multi-material electrochemical fabrication methods for producing such devices with particular embodiments relate to shredding devices and more particularly to shredding devices for use in medical applications. In some embodiments, tissue removal devices include tissue anchoring projections, improved blade configurations, and/or shields or shrouds around the cutting blades to inhibit outflow of tissue that has been brought into the device. | 08-29-2013 |
20130261400 | Instrument Port For Minimally Invasive Cardiac Surgery - The instrument ports for introducing instruments into a surgical site that are disclosed herein include a port body having a channel running therethrough from a proximal end to a distal end, an instrument sleeve in slidable contact with the channel, creating a gap therebetween, and a fluid flow element for removing emboli efficiently from the instrument port, wherein the fluid flow element includes the gap. Disclosed fluid flow systems are for use in the disclosed instrument ports. Methods are also disclosed for removably securing an instrument sleeve to a port body by anchoring the instrument port to heart tissue, making at least one flood line in a channel, flushing out emboli, and performing surgery with the instrument port. | 10-03-2013 |
20150025553 | RIGHT VENTRICULAR PAPILLARY APPROXIMATION - A device for treating tricuspid regurgitation includes a shaft and a first fixation mechanism disposed on a distal end of the shaft. The first fixation mechanism is configured to anchor the device to a first cardiac tissue. The device includes a second fixation mechanism disposed on a proximal end of the shaft. The second fixation mechanism is configured to anchor the device to a second cardiac tissue. The device includes an approximation mechanism connecting the first fixation mechanism and the second fixation mechanism, wherein the approximation mechanism causes the second fixation mechanism to move along the shaft toward the first fixation mechanism to approximate the first cardiac tissue and the second cardiac tissue. | 01-22-2015 |