Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 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 |
| 7193766 | Differential interferometric light modulator and image display device A light modulator incorporates a polarization sensitive prism and a novel MEMS ribbon device to impart a relative phase shift to polarization components of an incident light beam. A linear array of phase shifting elements in the MEMS device creates a linear image wh... | 03/20/2007 |
| 7116092 | Integrated spectrum analyzer circuits and methods for providing on-chip diagnostics Spectrum analyzer circuits and methods are provided which implement “zero-IF” (direct conversion) or “near-zero IF” (or very low IF) architectures that enable implementation of integrated (on-chip) spectrum analyzers for measuring the frequency spectrum of i... | 10/03/2006 |
| 7068025 | 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 fibre received in an aperture in the first sealing means and in optical communication with a first o... | 06/27/2006 |
| 7065120 | Integrated laser with Perot-Fabry cavity A monolithic integrated component (10) comprises a plurality of sections (21, 22) including a section (21) constituting a laser having a cavity delimited by a partially reflecting reflector and at least one other section (22) adjacent sai... | 06/20/2006 |
| 7047057 | Simultaneous multiwavelength TPSF-based optical imaging The TPSF-based imaging technique uses multiple wavelengths to image an object simultaneously. Acquisition time of an image can be shortened without sacrificing the effective amount or quality of raw imaging data acquired. A plurality of distinguishable wavelengths m... | 05/16/2006 |
| 6686997 | Apparatus and a method for pulse detection and characterization An optical/analog/digital pulse detector receives an input signal and drives a Bragg cell illuminated by a collimated light beam. The Bragg cell spatially modulates the collimated light beam and upon exiting the Bragg cell is imaged by lenses of an optics... | 02/03/2004 |
| 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 light received from a the light source. The light is communic... | 10/07/2003 |
| 6614215 | Particle detection system and components thereof A combined impedance and fluorescence particle detection system including an optically transmissive plate having an orifice for the flow of particles therethrough, a light source which operably directs light on a particle at the orifice, and a light detec... | 09/02/2003 |
| 6593727 | Data processor and data processing method for wavemeter The CPU outputs to the delay circuit 22 delay time setting signals for setting the delay time, based on input delay time data input from an external input device. The delay circuit 22 re-sets the delay time via new delay setting signals input from the CPU... | 07/15/2003 |
| 6580263 | Bit rate discrimination device with temperature compensation function Disclosed is a bit rate discrimination device that accurately discriminates a bit rate regardless of variations in the operating temperature. A photoelectric converter converts an input optical signal into an electric signal, and a bit rate detector detec... | 06/17/2003 |
| 6509729 | Multiple simultaneous optical frequency measurement A signal processing apparatus for providing concurrent electrical frequency measurements of multiple, time-coincident signal inputs. In one embodiment of the present invention, an input signal is received that contains a plurality of individual signals in... | 01/21/2003 |
| 6501258 | Optical spatial frequency measurement A signal processing apparatus for providing electrical frequency measurements of input signals. In one embodiment, a power splitter divides an RF input signal into first and second input signals. An RF channelizer having a filter bank receives the first i... | 12/31/2002 |
| 6384590 | Light receiving circuit for use in electro-optic sampling oscilloscope In a light receiving circuit for use in electro-optic sampling oscilloscope which receives first and second optical, photodiodes 51 and 52 are connected in series between a positive bias power supply 50P and a negative bias power supply 50N. The photodiod... | 05/07/2002 |
| 6348795 | Crystal resonant frequency sensor A method for determining a resonant frequency of a mechanical device having a first mass and at least one second mass mechanically coupled to the first mass comprises the steps of: providing a control signal to a voltage-controlled oscillator (VCO) to con... | 02/19/2002 |
| 6303926 | Optical sampler A sampling device that samples a first signal by modulating a second signal using the first signal, comprising: a holding circuit that holds a value of the first signal; a modulator that modulates the second signal using a difference between the value hel... | 10/16/2001 |
| 6288529 | Timing generation circuit for an electro-optic oscilloscope The present invention relates to an electro-optic sampling oscilloscope. This electro-optic sampling oscilloscope carries out measurement of measured signal by using an optical pulse generated based on a timing signal generated from a timing generation circuit... | 09/11/2001 |
| 5734578 | Optical RF spectrum analyzer An optical RF spectrum analyzer which is suitable for determining the reaime spectral frequency content of radar return signals. The optical RF spectrum analyzer includes a demodulator for demodulating an input RF signal to produce a time-varying voltage... | 03/31/1998 |
| 5583516 | Wavelength-selectable optical signal processor A wavelength-selectable optical signal processor for creating a predetermined optical delay pattern in a signal. The system includes a succession of optical delay pathways each receiving a portion of a modulated optical beam having a predetermined wavelen... | 12/10/1996 |
| 5481183 | Electro-optic spectrum analyzer A broadband spectrum analyzer for radio frequency and microwave signals. The signal to be analyzed modulates an optical laser beam through an electro-optic modulator. The resultant modulated beam thus comprises light at a frequency (carrier frequency) cor... | 01/02/1996 |
| 5335058 | Time series signal multichannel frequency analyzer using liquid crystal panel A time series signal multichannel frequency analyzer comprises a Fourier transform lens, a liquid crystal panel disposed at the front focal plane of the Fourier transform lens, means for inputting a time signal from a different signal source to each scann... | 08/02/1994 |
| 5281907 | Channelized time-and space-integrating acousto-optical processor A novel channelized, hybrid time- and space-integrating acousto-optic (AO) spectrum analyzer is described. The architecture consists of two acousto-optic cells in a crossed cell configuration. The first acousto-optic cell is a wide bandwidth device that p... | 01/25/1994 |
| 5256968 | Measurement of high-frequency electrical signals by electro-optical effect A system for measuring an electrical signal in a frequency range substantially equal to the bandwidth the signal close to the gigahertz includes two laser sources. A first laser source emits a first light wave which is polarized, then amplitude-modulated ... | 10/26/1993 |
| 5170048 | Optic signals processor including a charge-coupled device, notably a bias suppressor for a timing integration correlator In the disclosed optic signals processor, a term-by-term subtraction is made of the N homologous values of two series of values resulting from the integration of a light energy that selectively strikes respective photoactive pixels of a charge-coupled dev... | 12/08/1992 |
| 5166598 | Microwave transient analyzer A method and apparatus for capturing and recording indications of frequency content of electromagnetic signals and radiation is disclosed including a laser light source (12) and a Bragg cell (14) for deflecting a light beam (22) at a plurality of deflecti... | 11/24/1992 |
| 5041778 | Electrooptic measurement systems for frequency analysis of very wide range signals A spectrum analyzer for a variable amplitude and frequency electric signal includes an optical modulator responsive to the signal that derives a first optical wave having intensity and frequency components corresponding to the signal amplitude and frequen... | 08/20/1991 |
| 5034678 | Method of and apparatus for measuring the frequency response of an electrooptic device using an optical white noise generator A system for measuring the frequency response of an electrooptic device, such as an optical detector, includes an optical amplifier for generating an optical white noise spectrum that is delivered to the detector. In a first embodiment, an optical amplifi... | 07/23/1991 |
| 5012183 | Electrooptic effect element and electrical signal waveform measuring apparatus using the same An electrooptic effect element of this invention has first, second, and third electrodes. The first and second electrodes are formed on a substrate having an electrooptic effect, in order to form a high-frequency electric field for polarizing a light beam... | 04/30/1991 |
| 4926043 | Apparatus and method for optical measuring and imaging of electrical potentials An apparatus and method include using an electro-optic crystal lying on a component surface, the crystal being coated with a cooperating electrode which is transparent to a sampling laser beam to optically measure and image electrical potentials and volta... | 05/15/1990 |
| 4926083 | Optically modulated acoustic charge transport device A novel heterojunction acoustic charge transport device includes a transducer fabricated on a GaAs/AlGaAs heterojunction material that launches surface acoustic waver (SAW) along a transport channel. The device is characterized by a photodiode configured ... | 05/15/1990 |
| 4918373 | R.F. phase noise test set using fiber optic delay line A noise test set for analyzing the presence of phase noise in a radar signal. A delay line discriminator using a fiber optic cable and laser light modulated by the radar signal are used. Both direct and indirect modulation techniques are disclosed, togeth... | 04/17/1990 |
| 4910454 | System for electrical signal sampling with ultrashort optical pulses An electrical signal sampling system uses ultrashort optical pulses (of the order of 10 ps of less) to probe the electrical field from the signal being sampled. The probe is comprised of a modulator in the form of a Fabry-Perot optical interferometer (FP)... | 03/20/1990 |
| 4910458 | Electro-optic sampling system with dedicated electro-optic crystal and removable sample carrier An electro-optic sampler utilizes a Pockels cell comprising an electro-optic crystal and a separate, removable sample carrier having an electrical transmission line affixed thereto to provide an electric field accessible to the optical sampling pulses. In... | 03/20/1990 |
| 4891580 | Electro-optic measurements of voltage waveforms on electrical conductors The longitudinal electro-optic effect is used with an external probe to make voltage measurements on electrical conductors.... | 01/02/1990 |
| 4859843 | Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver An actual optical field spectrum is mixed down to baseband and can be observed directly to measure the optical field spectrum of an optical signal based on a local oscillator approach. This local oscillator approach is achieved without adding an additiona... | 08/22/1989 |
| 4812743 | Method and apparatus for detecting a narrowband signal In a method and apparatus for discriminating between a broadband unipolar signal having a component within one or more of three predetermined frequency bands and a narrowband signal within one of the frequency bands, a signal under test is amplified by a ... | 03/14/1989 |
| 4801872 | Guided-wave acoustooptic spectrum analyzer A guided-wave acoustooptic spectrum analyzer comprises a planar optical waveguide layer with electrodes of a transducer thereon. The electrodes are positioned at the center of a light path under which light is propagated. The light is deflected in respons... | 01/31/1989 |
| 4777433 | Spectrum analyzer A continuous wave laser and modulator drives a fibre optic delay line whose output is detected by a photo detector and gain control amplifier. The signal from the amplifier is phase advanced in a modulator by a phase advance signal whose period is equal t... | 10/11/1988 |
| 4771231 | Microwave oscillator with optical readout of resonance phenomena A microwave oscillator circuit having a voltage controlled oscillator for producing a controllable frequency microwave signal and a high overtone bulk acoustic resonator coupled to receive the signal is provided with a light source for directing a light b... | 09/13/1988 |
| 4755745 | Incoherent light optical processor An apparatus is described which performs acoustooptical signal processing functions with incoherent light, which procedures were formerly possible only with coherent light devices. Specific embodiments include an optical excisor, i.e., a programmable filt... | 07/05/1988 |
