Patent application number | Description | Published |
20150271122 | SYSTEMS AND METHODS FOR MANAGING SECURITY CERTIFICATES THROUGH EMAIL - The disclosed computer-implemented method for managing security certificates through email may include (1) receiving an encrypted email that contains both identifying information that identifies a security certificate for authenticating a website and a management command relating to the security certificate, (2) determining whether authentication of the encrypted email succeeded such that the management command is authorized, and (3) when a determination is made that authentication of the encrypted email succeeded, identifying the security certificate using the identifying information and executing the management command with respect to the identified security certificate. Various other methods, systems, and computer-readable media are also disclosed. | 09-24-2015 |
20150271145 | SYSTEMS AND METHODS FOR SMART CIPHER SELECTION - A computer-implemented method for smart cipher selection may include (1) receiving, at a server and from a client, a request to communicate according to a cipher for encryption, the request containing a client list of ciphers available at the client, (2) identifying a server list of ciphers available at the server, (3) measuring, in response to receiving the request, a resource load at the server and a risk factor indicating a degree of risk posed by the client, and (4) selecting a common cipher, from the client list and the server list, for encrypted communication based on the measured resource load at the server and the measured risk factor indicating the degree of risk posed by the client. Various other methods, systems, and computer-readable media are also disclosed. | 09-24-2015 |
Patent application number | Description | Published |
20120250192 | SHORT CIRCUIT PROTECTION FOR SENSOR - This disclosure is directed to techniques for protecting a sensor from a short to a power supply. According to one example consistent with these techniques, a circuit or device may include a sensor unit and a short protection unit. The sensor unit may generate at least one signal indicative of at least one measured property. The sensor unit may be configured to communicate the at least one generated signal via an output node coupled to the sensor unit. The short protection unit may determine whether the output node is electrically coupled to a power supply input. The short protection unit may, if the output node is electrically coupled to the power supply input, provide at least one auxiliary load between the sensor unit and the output node, and thereby protect the sensor unit to prevent the sensor unit from operating undesirably and/or to prevent the sensor unit from damage. | 10-04-2012 |
20130043111 | CIRCUIT BREAKER POSITION SENSING AND HEALTH MONITORING SYSTEM - A circuit breaker includes a breaker housing, a stationary contact, a movable contact, an operating shaft, and a linear position sensor. The stationary contact is non-movably mounted within the breaker housing, and the movable contact is movably mounted within the breaker housing. The movable contact is coupled to receive an input force and is configured, upon receipt of the input force, to move between a closed position, in which the movable contact is electrically coupled to the stationary contact, and an open position, in which the movable contact is electrically isolated from the stationary contact. The operating shaft is coupled to the movable contact to supply the input force thereto. The linear position sensor is connected to the operating shaft and is configured, upon movement of the operating shaft, to supply a position signal representative of movable contact position. | 02-21-2013 |
20130278247 | ARC POSITION ENCODER WITH AN EXTENDED ANGULAR POSITION SENSING RANGE - Disclosed are techniques for sensing an angular position of a rotating object over a 360-degree angular position range using an arc position encoder comprising a 180-degree angular position sensing range. The encoder may include a base defined by first and second ends, one or more magnetic field sensors disposed within the base between the first and second ends, one or more of first and second base extensions disposed on the first and second ends, and one or more polarity transition sensors disposed within the one or more of the first and second base extensions. The encoder may further include a magnetic target having first and second magnetic poles disposed on opposite ends so as to generate a uniform magnetic field, wherein the magnetic target is coupled to the rotating object so as to rotate about an axis of rotation located in a center of a circle defined by the base. | 10-24-2013 |
20140015520 | 180-DEGREE ARC POSITION ENCODER WITH AN EXTENDED ANGULAR POSITION SENSING RANGE - This disclosure describes techniques for sensing an angular position of a rotating object over an angular position range that includes up to 360 degrees using an arc position encoder comprising a substantially 180-degree angular position sensing range. The encoder may include a base comprising an arc length defined by a first and a second end, one or more magnetic field sensors disposed within the base between the first and second ends, and one or more polarity transition sensors also disposed within the base between the first and second ends. The encoder may further include a magnetic target that includes first and second magnetic poles disposed on opposite ends so as to generate a uniform magnetic field, wherein the magnetic target is coupled to the rotating object so as to rotate about an axis of rotation located substantially in a center of a circle defined by the base. | 01-16-2014 |
Patent application number | Description | Published |
20120249887 | System and Method to Reduce Channel Acquisition and Channel Switch Timings in Communication Receivers - A Television (TV) receiver for faster channel switch times between a plurality of broadcasting TV channels with reduced latency in overall demodulation cycle for multiple demodulation standards is provided. The TV receiver includes a tuner that receives the broadcasting TV channels from a broadcasting system, performs a tuning operation, and sets a desired frequency for each of the broadcasting TV channels during a channel scan operation. A demodulator demodulates each of the broadcasting TV channels and acquires one or more acquisition channel parameters of each of the broadcasting TV channels during the channel scan operation. An application processor is coupled to the demodulator via a low throughput interface. The application processor performs a read operation and a write operation of the acquisition channel parameters to memory mapped registers on the demodulator when a channel status switches from a first state to a second state. | 10-04-2012 |
20120249888 | Software Defined Radio for Universal Demodulation of Digital and Analog TV Signals - A Software Defined Radio (SDR) subsystem capable of supporting a multiple communication standards and platforms for modulation, demodulation and trans-modulation of an input signal is provided. The SDR subsystem includes a Signal Conditioning Cluster (SCC) unit that includes a signal conditioning CPU adapted for sample based signal processing, a Signal Processing Cluster (SPC) unit that includes a signal processing CPU adapted for block based signal processing, and a Channel Codec Cluster (CCC) unit that performs a channel encoding or a channel decoding operation. | 10-04-2012 |
20120250750 | METHOD AND SYSTEM FOR RELIABLE CFO AND STO ESTIMATION IN THE PRESENCE OF TUNER INDUCED IMPAIRMENT - A system and method for reducing implementation complexity for estimation of a Carrier Frequency Offset (CFO) and a Symbol Timing Offset (STO) for an input signal for spectrally shaped multiple communication standards. The system is implemented by replacing multiplier with shifters. The system includes a CFO estimation block, a STO estimation block, and a band extraction block that extracts a lower band edge and an upper band edge of the input signal. The STO estimation block includes (i) a sample error generation block that computes a sampling timing error value, and (ii) a Phase Lock Loop block that estimates a frequency error and a phase error corresponding to the sampling timing error value. The CFO estimation block includes (i) a carrier offset error generation block that generates a carrier offset error value, and (ii) a leaky average block for performing a filter operation. | 10-04-2012 |
20120250799 | BLIND SYMBOL SYNCHRONIZATION SCHEME FOR OFDM SYSTEM - An Orthogonal Frequency Division Multiplexing (OFDM) receiver system for improved pilotless detection of symbol boundary of a received OFDM symbols using M-ary Phase Shift Keying (M-PSK) modulated carriers as a cost function is provided. The OFDM receiver includes a symbol boundary detection block that detects a symbol boundary of the received OFDM symbols. The symbol boundary detection block detects the symbol boundary by computing cost function of second order moment of the M-PSK modulated carriers. The receiver system is capable of detecting the symbol boundary for unknown information on said received OFDM symbols and thus increases throughput per given transmission bandwidth of a modulation scheme. | 10-04-2012 |
20120252389 | EFFICIENT SCHEME FOR AUTOMATIC GAIN CONTROL IN COMMUNICATION SYSTEMS - A system for controlling an RF gain of a receiver that reduces a time taken to maintain an input signal level at an optimum dynamic range is provided. The system includes a tuner that receives a radio frequency (RF) signal and down-converts the RF signal to an intermediate frequency (IF) signal, and a demodulator. The tuner includes a radio frequency programmable gain amplifier (RF_VGA), a filter and an IF programmable gain amplifier (IF_VGA). The demodulator includes an analog to digital converter (ADC), and an Automatic Gain Control (AGC) unit that (i) receives a digital signal and an IF gain of the IF_VGA. The ADC samples a filtered IF signal under oversampling conditions to obtain an oversampled signal that includes an in-band signal and an out-of-band signal. The AGC unit (ii) controls the RF_VGA, the IF_VGA and (iii) measures an RF energy of the RF signal. | 10-04-2012 |
20120269300 | DIGITAL DOWNCONVERSION AND FAST CHANNEL SELECTION OF NARROWBAND SIGNALS USING A WIDE BAND RF TUNER - A wide band receiver to select and demodulate an input signal with single scan spectrum sensing by performing filtering on the input signal in digital domain to achieve improved selectivity and sensitivity is provided. The input signal includes one or more narrowband radio frequency (RF) signals. The wide band receiver includes a wide band tuner that down converts the one or more narrowband RF signals to one or more IF signals. An analog to digital converter (ADC) converts the one or more IF signals to one or more digital signals. A filter rejects out-of-band signals from the one or more digital signals to achieve the improved selectivity. A numeric controlled oscillator (NCO) selects at least one narrowband digital signal from the digital signals based on a phase value obtained from a spectrum selection control unit. A demodulator demodulates the narrowband digital signal to obtain a demodulated digital signal. | 10-25-2012 |
20120284318 | Digital Filter Implementation for Exploiting Statistical Properties of Signal and Coefficients - A method for implementing a digital filter is provided. The method includes (a) determining a bit-width of an incoming data sample of an incoming signal by measuring a distance between a leading zero or one of the incoming data sample and a trailing zero of the incoming data sample. The incoming data sample is obtained by sampling the incoming signal at a pre-defined time interval, (b) obtaining bit-width multipliers with variable bit-widths based on a first probability distribution function (PDF) of bit-widths of incoming data samples, (c) allocating the incoming data sample and a filter coefficient based on the bit-width of the incoming data sample and a bit-width of the filter coefficient to one bit-width multiplier of the bit-width multipliers, and (d) performing a multiply operation of a Multiply and Accumulate (MAC) operation on the one bit-width multiplier to generate an output of the digital filter. | 11-08-2012 |
20120284464 | Zero Overhead Block Floating Point Implementation in CPU's - A system for computing a block floating point scaling factor by detecting a dynamic range of an input signal in a central processing unit without additional overhead cycles is provided. The system includes a dynamic range monitoring unit that detects the dynamic range of the input signal by snooping outgoing write data and incoming memory read data of the input signal. The dynamic range monitoring unit includes a running maximum count unit that stores a least value of a count of leading zeros and leading ones, and a running minimum count that stores a least value of the count of trailing zeros. The dynamic range is detected based on the least value of the count of leading zeros and leading ones and the count of trailing zeros. The system further includes a scaling factor computation module that computes the block floating point (BFP) scaling factor based on the dynamic range. | 11-08-2012 |
20130326275 | HARDWARE PLATFORM VALIDATION - A system for validating a hardware platform is provided. The system includes a database that stores one or more test specifications, a compiler that generates a target image based on (i) a device driver obtained from a device driver generator, (ii) a platform independent target application code, (iii) a kernel source, and (iv) a run time environment, and a software driven validation generator that analyses the run time specification and the device programming specification and generates (i) one or more test cases based on (a) the one or more test specifications, and (b) the device programming specification, and (ii) a control software based on the test cases. The test cases include configurations that are specific to the hardware platform. The hardware platform is validated based on (i) an execution of the target image and the control software on the hardware platform, and (ii) the one or more test cases. | 12-05-2013 |
20140022391 | SYSTEM AND METHOD FOR ENABLING CONTROL OF PTZ CAMERAS - A system for controlling at least one camera by enabling a forward channel and a reverse channel is provided. The system includes (i) one or more cameras, (ii) a CMRS that obtains audio information, and video information from the cameras via a coaxial cable or over air. A camera control unit multiplexes PTZ information associated with the one or more cameras and generates a data packet. A modulator modulates the data packet to obtain a modulated data packet which is up converted to a desired RF frequency. A tuner receives the desired RF frequency through the coaxial cable or air, and down converts the RF frequency to obtain the modulated data packet. A demodulator demodulates the modulated data packet to obtain the data packet. A processor de-multiplexes the data packet to obtain the PTZ information that includes a command for at least one of panning, tilting, and zooming a camera. | 01-23-2014 |
20140075053 | RUN TIME GENERATION AND FUNCTIONALITY VALIDATION OF DEVICE DRIVERS - A method of generating and validating a device driver for a hardware device is provided. The method include (i) dynamically querying the hardware device for a device programming specification, (ii) dynamically querying a run time environment for a run time specification, (iii) obtaining the device programming specification that is specific to the hardware device, (iv) obtaining the run time specification that is specific to the hardware device and the run time environment, (v) dynamically synthesizing a device driver, by a device driver generation tool to obtain a synthesized device driver, (vi) automatically testing, by the device driver generation tool, the synthesized device driver based on a device class of the hardware device, and (vii) automatically evaluating, by the device driver generation tool, a performance of the synthesized driver with respect to standard performance parameters for the device class of the hardware device for validating the synthesized device driver. | 03-13-2014 |
20140164106 | System and method for enabling and performing services and functionalities across device types and service providers within a communication device. - A method for enabling services and functionalities across device types and service providers within a communication device includes processing a first device function type, a first service type, and a first cost function from the device, obtaining a first firmware and communicating the first firmware to the communication device for execution, activating a first set of service enabling instructions to enable a first service and a first functionality associated with the first firmware when the first firmware is executed on the communication device, processing a second device function type, a second service type, and a second cost function from the device, obtaining a second firmware to be executed on the device, communicating the second firmware to the device, and activating a second set of service enabling instructions to enable a second service and a second functionality associated with the second firmware when the second firmware is executed on the device. | 06-12-2014 |
Patent application number | Description | Published |
20100085787 | SYSTEM AND METHOD FOR POWERING A HYBRID ELECTRIC VEHICLE - A drive system including a first bus, a second bus, an AC bus, an energy storage device coupled to the first bus, the energy storage device configured to output a stored DC voltage to the first bus and configured to receive a charging voltage from the first bus, and a power converter electrically coupled between the first bus and the second bus, the power converter configured to convert a DC voltage on the first bus to a DC voltage suitable for the second bus and configured to convert a DC voltage on the second bus to a DC voltage suitable for the first bus and suitable for charging the energy storage device. The system further includes a voltage inverter coupled between the second bus and the AC bus, the voltage inverter configured to invert a DC voltage on the second bus to an AC voltage suitable for the AC bus and configured to invert an AC voltage on the AC bus to a DC voltage suitable for the second bus to supply the DC voltage to the first bus. | 04-08-2010 |
20100243564 | SYSTEM AND METHOD FOR MONITORING AN INTEGRATED SYSTEM - A control system includes an estimator configured to determine a present state of a device and compare the present state of the device with an expected state of the device. The control system further includes a predictor operatively coupled to the estimator, and configured to predict an event for execution by the device to reach the expected state of the device. The control system also includes a supervisory control unit operatively coupled to the predictor and the device, and configured to facilitate execution of the predicted event by the device. | 09-30-2010 |
20100326896 | SYSTEM INCLUDING A DIGESTER AND A DIGESTER EMULATOR - Disclosed herein is a system comprising a primary digester and a digester emulator. The digester emulator is capable of dynamically estimating the primary digester performance. | 12-30-2010 |
20120169322 | PHASE IDENTIFICATION SYSTEM AND METHOD - A phase identification system includes a power distribution station comprising a phase distortion device to generate distortions at cross over points of at least two pairs of three phase voltages and a phase detection device to receive one of the three phase voltages and to identify a phase of the received voltage based on a characteristic of a distortion in the received voltage. | 07-05-2012 |
20140152109 | MEDIUM VOLTAGE UNINTERRUPTIBLE POWER SUPPLY - A medium voltage uninterruptible power supply system is presented. The system includes a first power converter coupled between a first bus and a second bus. Furthermore, a second power converter operatively coupled to the first power converter via the first bus and the second bus, where the second power converter includes at least three legs, where the at least three legs include a plurality of switching units, and where the plurality of switching units includes at least two semiconductor switches and an energy storage device. Additionally, system includes a direct current link coupled between the first bus and the second bus. Also, system includes an energy source coupled to the second power converter, the direct current link, or a combination thereof via one or more of a third power converter, a transformer, and a fourth power converter. Method of operating a medium voltage uninterruptible power supply system is also presented. | 06-05-2014 |
20150035284 | POWER CONVERSION SYSTEM AND METHOD - An exemplary power conversion system includes a first power conversion module, a second power conversion module, and a controller. The first power conversion module includes a first source side converter, a first load side converter, and a first DC link coupled between the first source side converter and the second load side converter. The second power conversion module includes a second source side converter, a second load side converter, and a second DC link coupled between the second source side converter and the second load side converter. The controller is configured to generate a number of switching signals according to a circuit structure of the power source module or a circuit structure of the load module. The switching signals are provided to the first power conversion module and the second power conversion module to balance a first DC link voltage and a second DC link voltage. | 02-05-2015 |
20150131349 | SYSTEM AND METHOD FOR BALANCING MULTILEVEL POWER CONVERTERS - A system including a multi-level power converter is provided. The system also includes a plurality of DC link capacitors and a balancing circuit coupled to the multi-level power converter. The balancing circuit further includes two sets of interface branches. Each set includes a plurality of interface branches and a plurality of switching elements. The balancing circuit also includes a battery coupled to one or more inductors across the two sets of interface branches and a controller for controlling switching operations of the plurality of switching elements for modifying a voltage of the battery to balance voltages of the plurality of DC link capacitors. | 05-14-2015 |
20150162782 | METHOD AND SYSTEM FOR A DUAL CONVERSION UNINTERRUPTIBLE POWER SUPPLY - A method and system for an uninterruptible power supply (UPS) are provided. The UPS includes a three-phase high power transformer, an active or passive-rectifier configured to generate and regulate a set of DC link voltages, and a set of cascaded inverters configured to generate an AC voltage using the DC link voltages. The UPS also includes a set of bi-directional battery converters configured to charge a bank of backup batteries when power is available from an AC mains source and discharge the bank of backup batteries to generate a three-phase AC voltage when the AC mains source voltage falls outside a predetermined range. The UPS further includes a bypass switch configured to electrically couple the AC mains source directly to a load when the UPS is in a bypass mode of operation and electrically couple the bank of backup batteries to the load through the set of bi-directional battery converters and the transformer. | 06-11-2015 |
20150244210 | REDUNDANT UNINTERRUPTIBLE POWER SUPPLY SYSTEMS - A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle is calculated relative to a common reference angle, and control operation of each UPS based on the respective calculated phase angles. | 08-27-2015 |
20150263566 | REDUNDANT UNINTERRUPTIBLE POWER SUPPLY SYSTEMS - A system is provided. The system includes a utility, a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs, the controller configured to determine a common reference angle while the utility is disconnected from at least one UPS of the plurality of UPSs, calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle for each UPS is calculated relative to the common reference angle, and control operation of each UPS based on the respective calculated phase angles. | 09-17-2015 |
20150263567 | REDUNDANT UNINTERRUPTIBLE POWER SUPPLY SYSTEMS - A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate an output voltage frequency for each UPS of the plurality of UPSs, and control operation of each UPS based on the respective calculated output voltage frequencies. | 09-17-2015 |
20160055999 | SYSTEM AND METHOD FOR QUENCHING AN ARC - An arc quenching system is presented. The arc quenching system includes a mounting structure, a plurality of movable arc chute plates mounted on the mounting structure, and a motion delivery unit mechanically coupled to the mounting structure. The motion delivery unit is configured to impart at least one of a rotation motion and a vibration motion to one or more movable arc chute plates of the plurality of movable arc chute plates. | 02-25-2016 |
20160111872 | INDUCTION GENERATOR SYSTEM WITH A GRID-LOSS RIDE-THROUGH CAPABILITY - A power generation system is provided. The system includes a prime mover for transforming a first energy to a second energy. The system also includes an induction generator operatively coupled to the prime mover and configured to generate electrical power using the second energy. The system further includes an inverter electrically coupled to the induction generator for controlling a terminal voltage of the induction generator during a grid-loss condition. The system also includes a power dissipating device operatively coupled to the inverter for dissipating power generated by the induction generator during the grid-loss condition. | 04-21-2016 |
Patent application number | Description | Published |
20090238170 | METHOD AND SYSTEM FOR PROVIDING VOICE OVER IP (VOIP) TO WIRELESS MOBILE COMMUNICATION DEVICES - A wireless voice over Internet Protocol (VOIP) system comprises a VOIP-enabled wireless communication device (WCD) and a VOIP gateway. The WCD includes a short-range wireless interface and a client application configured to place and receive VOIP calls through the short-range wireless interface. The VOIP gateway includes a short-range wireless interface for communicating with the WCD, a network interface for communicating with the Internet, and a VOIP service client configured to communicate with a VOIP service over the Internet by way of the network interface. The VOIP gateway also includes a proxy server configured to act as an interface between the WCD client application and the VOIP service client and to route the VOIP calls through the gateway's short-range wireless interface. | 09-24-2009 |
20090258596 | DYNAMICALLY VARYING LINK SUPER VISION TIMEOUT IN BLUETOOTH AND SIMILARLY ENABLED DEVICES TO DETECT LINK LOSS - The present example provides for modification of the link supervision timer allows for an enhanced user experience with wireless devices, by allowing loss of the wireless link to be handled more effectively. The link super vision timer may be changed without modifying the device profile being used. The change in the timer may be based upon the profile of the communications that is occurring, and upon the current state of the communications. | 10-15-2009 |
20100273526 | WIRELESS DEVICE ACCESS TO INTERNET VIA PERSONAL COMPUTER - A wireless device, system and method that receive a downloadable file from a wide area network are described. The system comprises a wireless device, a computer and a computer software module. The computer is communicatively coupled to a modem that communicates with a wide area network. The computer further comprises a computer wireless communications module that communicates with at least one wireless device that is in proximity to the computer. The wireless device comprises a device memory, a first wireless device communications module that is configured to communicate with the computer wireless module, and a device display that displays a link that corresponds to a downloadable file accessible using the wide area network. The computer software module resides on the computer and receives the link from the wireless device. The computer software module requests the downloadable file from the wide area network and forwards the downloadable file to the wireless device without storing the downloadable file on the computer. | 10-28-2010 |
Patent application number | Description | Published |
20090081560 | COMPOSITIONS AND METHODS FOR STORING HOLOGRAPHIC DATA - The present invention provides a method for storing holographic data comprising providing a holographic storage medium comprising an optically transparent substrate including a photochemically active dye having at least two nitrone groups; and irradiating the optically transparent substrate with a holographic interference pattern, wherein the pattern has a first wavelength and an intensity both sufficient to convert, within a volume element of the substrate, at least some of the photochemically active dye into a photo-product, and producing within the irradiated volume element concentration variations of the photo-product corresponding to the holographic interference pattern, thereby producing a first optically readable datum corresponding to the volume element. | 03-26-2009 |
20090082580 | COMPOSITIONS AND METHODS FOR STORING HOLOGRAPHIC DATA - In one aspect, the present invention provides a novel thiophene-containing polynitrone compound having structure (II) | 03-26-2009 |
20110065843 | FLUORESCENT BRIGHTENERS, METHODS OF PREPARATION THEREOF, FLUORESCENT BRIGHTENER COMPOSITIONS, AND METHODS OF PREPARATION AND USES THEREOF - A compound of Formula (I) | 03-17-2011 |
20110196075 | AUTHENTICATABLE ARTICLES AND METHODS THEREFOR - An article comprising the compound of Formula (I): | 08-11-2011 |
20120203001 | FLUORESCENT BRIGHTENERS, METHODS OF PREPARATION THEREOF, FLUORESCENT BRIGHTENER COMPOSITIONS, AND METHODS OF PREPARATION AND USES THEREOF - A compound of Formula (I) | 08-09-2012 |
20120208110 | HOLOGRAPHIC STORAGE MEDIUM AND METHOD OF MAKING HOLOGRAPHIC STORAGE MEDIUM - Articles for recording a holographic image are described. The articles include a holographic recording medium having a plurality of surfaces, having a transparent polymeric binder and a photochemically active dye, the holographic recording medium having a holographic image recorded therein formed by exposed areas of the photochemically active dye and unexposed areas of the photochemically active dye; and a first light-blocking layer or material over a first surface of the holographic recording medium from which surface the holographic image is viewed, the light blocking layer or material absorbing light in the wavelength range to which the photochemically active dye is sensitive and allowing transmission of light in a different wavelength range for viewing the holographic image. | 08-16-2012 |
20130004887 | HOLOGRAPHIC RECORDING MEDIUM - Disclosed herein are novel nitrone compounds, holographic recording media that include the nitrone compound(s) and a polymer binder, a method of manufacturing a holographic recording medium where the nitrone compound, as a photochromic dye, is mixed with a polymer binder to form a holographic composition and molding the holographic composition into holographic data recording medium. Disclosed herein too is a method for recording a hologram by exposing the holographic recording medium to mutually coherent signal and reference light sources at a wavelength that causes a change in the chemical structure of the nitrone compound. | 01-03-2013 |
20130071773 | HOLOGRAPHIC STORAGE MEDIUM - Disclosed herein are novel amidic nitrone and a method of manufacturing a data storage media comprising mixing the amidic nitrone, as a photochromic dye, with an organic material or an inorganic material to form a holographic composition and molding the holographic composition into holographic data storage media. Disclosed herein too is an article comprising a photochromic dye and an organic material, wherein the article is used as a data storage media. Disclosed herein too is a method for recording information comprising irradiating an article that comprises a photochromic dye, wherein the irradiation is conducted with electromagnetic energy having a wavelength of about 350 to about 1,100 nanometers; and reacting the photochromic dye. | 03-21-2013 |
20130183608 | HOLOGRAPHIC RECORDING MEDIUM AND METHOD OF MAKING HOLOGRAPHIC RECORDING MEDIUM - Articles for recording a hologram are described. The articles include a holographic recording medium having a transparent polymeric binder and a photoreactive dye dispersed therein. The articles also include a first compound, dispersed in the holographic recording medium or disposed over a first surface of the holographic recording medium from which surface the hologram is viewed, that is transparent to light in the wavelength range to which the photoreactive dye is sensitive and which is capable of being converted to a converted compound that is opaque to light in the wavelength range to which the photoreactive dye is sensitive and transparent to light in a different wavelength range for viewing the hologram. | 07-18-2013 |
20140200308 | POLYCARBONATE COMPOSITIONS HAVING IMPROVED THERMAL DIMENSIONAL STABILITY AND HIGH REFRACTIVE INDEX - Disclosed herein are methods and compositions of polycarbonate compositions having, among other characteristics, improved thermal dimensional stability, hydrolytic stability and high refractive index. The resulting polycarbonate copolymer composition, comprising a polycarbonate and a polysulfone, can be used in the manufacture of articles for optical applications. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention. | 07-17-2014 |
20140212792 | HOLOGRAPHIC STORAGE MEDIUM AND METHOD OF MAKING HOLOGRAPHIC STORAGE MEDIUM - Articles for recording a holographic image are described. The articles include a holographic recording medium having a plurality of surfaces, having a transparent polymeric binder and a photochemically active dye, the holographic recording medium having a holographic image recorded therein formed by exposed areas of the photochemically active dye and unexposed areas of the photochemically active dye; and a first light-blocking layer or material over a first surface of the holographic recording medium from which surface the holographic image is viewed, the light blocking layer or material absorbing light in the wavelength range to which the photochemically active dye is sensitive and allowing transmission of light in a different wavelength range for viewing the holographic image. | 07-31-2014 |
20150336869 | DICARBOXYLIC ACID MONOMERS AND METHODS OF MAKING AND USING THE SAME - Disclosed herein are phenylindane dicarboxylic acid (PIDA) monomers, polymer compositions comprising the PIDA monomers, and methods of preparing PIDA monomers. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure. | 11-26-2015 |