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162 results about "Speed of light" patented technology

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299792458 metres per second (approximately 300000 km/s (186000 mi/s)). It is exact because by international agreement a metre is defined as the length of the path travelled by light in vacuum during a time interval of ¹⁄₂₉₉₇₉₂₄₅₈ second. According to special relativity, c is the upper limit for the speed at which conventional matter and information can travel. Though this speed is most commonly associated with light, it is also the speed at which all massless particles and field perturbations travel in vacuum, including electromagnetic radiation and gravitational waves. Such particles and waves travel at c regardless of the motion of the source or the inertial reference frame of the observer. Particles with nonzero rest mass can approach c, but can never actually reach it. In the special and general theories of relativity, c interrelates space and time, and also appears in the famous equation of mass–energy equivalence E = mc².

Coordinate measurement machines with removable accessories

ActiveUS20130097882A1Programme controlUsing optical meansMeasurement deviceObject based
A portable articulated arm coordinate measuring machine for measuring the coordinates of an object in space is provided. The AACMM includes a base and an arm portion having an opposed first and second ends. The arm portion including a plurality of connected arm segments that each includes at least one position transducer for producing a position signal. An electronic circuit is provided that receives the position signal from the at least one position transducer and provides data corresponding to a position of the measurement device. A noncontact three-dimensional measuring device is coupled to the first end, the device having an electromagnetic radiation transmitter and is configured to determine a distance to an object based at least in part on the speed of light in air. A processor is configured to determine the three-dimensional coordinates of a point on the object in response to receiving the position signals and the distance to the object.
Coordinate measurement machines with removable accessories
Coordinate measurement machines with removable accessories
Coordinate measurement machines with removable accessories
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Owner:FARO TECH INC

Wireless tracking system based upon phase differences

InactiveUS20060066485A1Direction finders using radio wavesPosition fixationPhase differenceTime difference
A system and method of obtaining high accuracy position information relating to one or more mobile transmitters within a wireless tracking system relies upon phase differences for the time difference of arrival measurements of the transmitter(s). One or more transmitters send signals to multiple receivers, and the time difference of arrival of the transmitter(s) radio signals received at each receiver is used to determine the physical location of the transmitter(s). The high accuracy of the system is obtained through a process of using the transmitter(s)' signals' phase as a reference for time measurements. Since electromagnetic waves travel at the speed of light, knowing how long it takes for a wave to travel from the transmitter to the receiver stations enables a central station to determine the distances the receiver stations are from the transmitter. With predetermined receiver station coordinates, the coordinate of an object embedded with, or carrying, the transmitter can be determined.
Wireless tracking system based upon phase differences
Wireless tracking system based upon phase differences
Wireless tracking system based upon phase differences
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Owner:MIN GUOHUA

Method and apparatus for geolocating a wireless communications device

InactiveUS6891500B2Avoid computing timeImprove signal-to-noise ratioDirection finders using radio wavesSpecial service for subscribersPhase differenceMultilateration
The time difference of arrival for a signal received at two or more receiving sites as transmitted from a wireless communications device, is determined by a frequency domain technique. The constituent frequencies of the signals received at the two or more receiving sites are determined, including the phase, or a value representative of the phase, of each frequency component. The phase values for the same frequency are subtracted to yield a phase difference values as a function of frequency. The slope of the function represents the time difference of arrival for the wireless communications device signal as received at the two receiving sites. To determine the mobile location based on the determined time difference of arrival values, a seed or initial location is first assumed for the wireless communications device and the distance difference of arrival (the time difference of arrival multiplied by the speed of light) is calculated. The calculated time difference of arrival is then used to adjust the distance difference of arrival by continuously iterating the position of the wireless communications device until the calculated distance of arrival and the calculated time difference of arrival (as multiplied by the speed of light) are within a predetermined margin.
Method and apparatus for geolocating a wireless communications device
Method and apparatus for geolocating a wireless communications device
Method and apparatus for geolocating a wireless communications device
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Owner:HALL CHRISTOPHER J +2

Method and apparatus for geolocating a wireless communications device

InactiveUS20050184907A1Avoid computing timeImprove signal-to-noise ratioDirection finders using radio wavesSpecial service for subscribersPhase differenceGeolocation
The time difference of arrival for a signal received at two or more receiving sites as transmitted from a wireless communications device, is determined by a frequency domain technique. The constituent frequencies of the signals received at the two or more receiving sites are determined, including the phase, or a value representative of the phase, of each frequency component. The phase values for the same frequency are subtracted to yield a phase difference values as a function of frequency. The slope of the function represents the time difference of arrival for the wireless communications device signal as received at the two receiving sites. To determine the mobile location based on the determined time difference of arrival values, a seed or initial location is first assumed for the wireless communications device and the distance difference of arrival (the time difference of arrival multiplied by the speed of light) is calculated. The calculated time difference of arrival is then used to adjust the distance difference of arrival by continuously iterating the position of the wireless communications device until the calculated distance of arrival and the calculated time difference of arrival (as multiplied by the speed of light) are within a predetermined margin.
Method and apparatus for geolocating a wireless communications device
Method and apparatus for geolocating a wireless communications device
Method and apparatus for geolocating a wireless communications device
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Owner:HALL CHRISTOPHER J +2

Multi-mode optical measurement device and method of operation

ActiveUS20140226145A1Easy to measureFaster （usuallyOptical rangefindersActive open surveying meansObject basedLight beam
An optical measurement device is provided includes a tracker device configured to emit a first beam of light and receive a portion of the first beam of light reflected off of a target. The first beam of light being emitted from a gimbal location, the tracker device further including an absolute distance meter configured to determine the distance to the target. A scanner device is provided that is configured to emit a second beam of light along a pathway without reversing direction and receive a portion of the second beam of light reflected off an object. The second beam of light being emitted from the gimbal location, the scanner further being configured to determine the distance to the object based at least in part on the speed of light.
Multi-mode optical measurement device and method of operation
Multi-mode optical measurement device and method of operation
Multi-mode optical measurement device and method of operation
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Owner:FARO TECH INC

Coordinate measurement machines with removable accessories

ActiveUS20130212889A9Programme controlUsing optical meansObject basedMeasurement device
A portable articulated arm coordinate measuring machine for measuring the coordinates of an object in space is provided. The AACMM includes a base and an arm portion having an opposed first and second ends. The arm portion including a plurality of connected arm segments that each includes at least one position transducer for producing a position signal. An electronic circuit is provided that receives the position signal from the at least one position transducer and provides data corresponding to a position of the measurement device. A noncontact three-dimensional measuring device is coupled to the first end, the device having an electromagnetic radiation transmitter and is configured to determine a distance to an object based at least in part on the speed of light in air. A processor is configured to determine the three-dimensional coordinates of a point on the object in response to receiving the position signals and the distance to the object.
Coordinate measurement machines with removable accessories
Coordinate measurement machines with removable accessories
Coordinate measurement machines with removable accessories
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Owner:FARO TECH INC

Photonic neural network convolutional layer chip based on micro-ring resonator

ActiveCN109639359AImprove energy consumption ratioDoes not consume energyWavelength-division multiplex systemsElectromagnetic transmittersBusiness efficiencyHigh energy
The invention discloses a photonic neural network convolutional layer chip based on a micro-ring resonator. The chip is universal to all deep learning technologies including convolutional calculation.According to the chip, vectorized to-be-calculated signals are loaded on different optical wavelengths by means of a wavelength division multiplexing mode. The micro-ring resonator and a balance photoelectric detector form a weight matrix, convolutional calculation of the to-be-calculated signals and the weight matrix can be completed, and a convolutional result is output. By utilizing the tunability of the integrated micro-ring resonator, the convolutional calculation of any numerical value can be realized. In addition, the speed of the convolutional calculation is increased to a constant level (that is, the speed of light) by using light as a numerical calculation medium, and the advantage of a higher energy efficiency ratio is achieved.
Photonic neural network convolutional layer chip based on micro-ring resonator
Photonic neural network convolutional layer chip based on micro-ring resonator
Photonic neural network convolutional layer chip based on micro-ring resonator
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Owner:SHANGHAI JIAO TONG UNIV

Plasma processing apparatus

InactiveUS20050051273A1Improve uniformityPrecise processingCellsElectric discharge tubesElectric forceHigh frequency power
Plasma processing apparatus
Plasma processing apparatus
Plasma processing apparatus
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Owner:HITACHI HIGH-TECH CORP

Laser scanner

InactiveUS7589826B2Without operating speedLess susceptibleOptical rangefindersElectromagnetic wave reradiationLaser scanningOptoelectronics
A laser scanner which operates pursuant to the elapsed time principle and which has a pulsed laser that directs successive light pulses into a monitored region. The laser scanner further has a light receiving arrangement for receiving light pulses reflected by an object in the monitored region and that generates electric received signals which are fed to an evaluation unit for determining a distance between the object and the laser scanner based on the elapsed time between the emission of the light pulse and the receipt of the reflected pulse and the speed of light from which a distance signal is formed that is representative of the distance between the object and the scanner. There is a light diverter unit between the pulsed laser and the monitored region which continuously directs light pulses along different directions into the monitored region. A light source is provided which emits a light measuring signal of reduced strength which is also continuously directed into the monitored region in continuously changing directions. The light receiving arrangement is configured to receive the light measuring signal reflected by the object in the monitored region and to generate a reflection signal that is representative of the reflection characteristics of the object. The light pulses and the receiving signals are changeable in dependency of the reflection signal.
Laser scanner
Laser scanner
Laser scanner
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Owner:SICK AG

High speed light emitting semiconductor methods and devices

ActiveUS20100272140A1Improve featuresHigh yieldLaser detailsElectric lighting sourcesOptical cavityQuantum size effect
A method for producing a high frequency optical signal component representative of a high frequency electrical input signal component, includes the following steps: providing a semiconductor transistor structure that includes a base region of a first semiconductor type between semiconductor emitter and collector regions of a second semiconductor type; providing, in the base region, at least one region exhibiting quantum size effects; providing emitter, base, and collector electrodes respectively coupled with the emitter, base, and collector regions; applying electrical signals, including the high frequency electrical signal component, with respect to the emitter, base, and collector electrodes to produce output spontaneous light emission from the base region, aided by the quantum size region, the output spontaneous light emission including the high frequency optical signal component representative of the high frequency electrical signal component; providing an optical cavity for the light emission in the region between the base and emitter electrodes; and scaling the lateral dimensions of the optical cavity to control the speed of light emission response to the high frequency electrical signal component.
High speed light emitting semiconductor methods and devices
High speed light emitting semiconductor methods and devices
High speed light emitting semiconductor methods and devices
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Owner:QUANTUM ELECTO OPTO SYST +1

System and method for rejecting far-field signals using an implantable cardiac stimulation device

InactiveUS7139611B1Transvascular endocardial electrodesHeart stimulatorsElectricityAudio power amplifier
A technique is provided for filtering far-field electrical cardiac signals from near-field signals. Atrial tip and ring signals are sensed using unipolar electrodes and any timing differences between corresponding events within the signals are detected. Then, far-field signals are filtered from the tip and ring signals based on the detected timing differences, such that substantially only near-field atrial signals remain. The technique exploits the fact that near-field atrial signals are sensed when a conduction wave passes by the atrial electrodes. In contrast, far-field signals from the ventricles propagate to the atrium at near the speed of light. Hence, any significant timing difference between corresponding events appearing in the atrial signals is indicative of a near-field event, whereas the lack of a significant timing difference is indicative of a far-field event. In one example, a sense amplifier is provided with a Boolean logic circuit to aid in time delay-based filtering.
System and method for rejecting far-field signals using an implantable cardiac stimulation device
System and method for rejecting far-field signals using an implantable cardiac stimulation device
System and method for rejecting far-field signals using an implantable cardiac stimulation device
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Owner:PACESETTER INC

Tracking a Radio Beacon from a Moving Device

ActiveUS20160054425A1Reduce repetition rateAccurate measurementRadio wave direction/deviation determination systemsPosition fixationMultilaterationMobile device
A method and devices are disclosed, for tracking a radio beacon from a moving device, while the beacon transmits periodic signals, which the device detects at least at two different locations, and the device provided with information enabling determining the time difference between transmissions of these periodic signals. The method discloses a formula for estimating the angle between the course of the moving device and the beacon: ar cos [c*(TDOA12−TDOT12) / baseline12]; wherein the moving device detects signal 1 and signal 2 respectively at location 1 and location 2, the distance between these locations defined as baseline12, TDOA12 is the Time Difference of Arrival of the signals at the two locations, TDOT12 is the time difference between transmission of these signals, and c is the speed of light.
Owner:KATZ

Positioning method and system in two or more cellular networks

ActiveUS20090286552A1Accurate positioning estimationPrecise positioningPosition fixationWireless commuication servicesComputer scienceSpeed of light
A positioning method in two or more cellular networks calculates a gradient (grad (J)) of an optimization function for estimating position of UE:
J=∑j=1Nswj∑i=1Njwij[(X-X0j-X-Xij)-cΔtij]2,
wherein X0j is the position of a reference cell of the jth network, Xij is the position of the ith cell of the jth network, Wij is the weight directly proportional to the downlink signal receiving intensity of the ith cell of the jth network, wj is the weight inversely proportional to the signal code continuing time of the jth network, ∥x−x0∥=√{square root over ((x−x0)2+(y−y0)2+(z−z0)2)}{square root over ((x−x0)2+(y−y0)2+(z−z0)2)}{square root over ((x−x0)2+(y−y0)2+(z−z0)2)} is the Euclidian distance, Nj is the number of non-reference cell of the jth network, Ns is the number of networks, c is the speed of light.
Positioning method and system in two or more cellular networks
Positioning method and system in two or more cellular networks
Positioning method and system in two or more cellular networks
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Owner:SPREADTRUM COMM (SHANGHAI) CO LTD

Scanner

InactiveUS7480031B2Reduced responsivenessLess sensitiveOptical rangefindersElectromagnetic wave reradiationBeam splitterRadar
A laser radar device that operates on an elapsed time basis and has a pulsating laser for emitting successive light pulses into a monitored region. A light receiver receives light impulses reflected by an object in the monitored region and generates electrical signals responsive to the received light impulses. The signals are forwarded to an evaluation unit adapted to generate a distance signal indicative of a distance between the object and the laser radar device on the basis of the speed of light and an elapsed time between the emission of the light pulses and the receipt of the reflected light pulses. A light diverter located between the laser and the monitored region continuously varies the directionality of the light impulses directed into the monitored region and includes a beam splitter that divides the energy of the emitted light pulses into a main beam and a sensing beam. The beam splitter causes a constant angular offset between the main beam and the sensing beam in the direction in which the directionality of the light beams is varied. A further light receiver is provided for receiving light impulses from the sensing beam reflected by the object.
Scanner
Scanner
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Owner:SICK AG

Method for detecting the load of items to be washed, and dishwasher machine

ActiveCN1988839ABest washing efficiencyImplement autostartTableware washing/rinsing machine detailsAutomatic washing/rinsing machine detectionImage detectionEngineering
The invention relates to a method for determining the type and / or quantity of items to be washed (30) in a dishwasher machine (1). According to said method, the items to be washed (30) are placed in compartments (3, 4) in the washing region (2) of the machine, the loading of said compartments (3, 4) being detected by an image detection system (31, 32, 33). Said image detection system (31, 32,33) measures distances between items in a contactless manner by means of the speed of light in order to obtain a three-dimensional image of the rinsing region (2).
Method for detecting the load of items to be washed, and dishwasher machine
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Owner:BOSCH SIEMENS HAUSGERATE GMBH

Practical Time Machine Using Dynamic Efficient Virtual And Real Robots

InactiveUS20090234788A1Digital computer detailsArtificial lifeThe InternetSimulation
A method for time travel, which allows an object or a group of objects to travel into the past or the future, as well as a method to cut objects from the past or future and paste them to the current environment. The present invention, called the practical time machine, requires teams of super intelligent robots that work together in the virtual world and the real world to generate a perfect timeline of planet Earth. The timeline of Earth records all objects, events and actions every fraction of a nanosecond for the past or the future. A time traveler will set a time travel date; the time traveler can be one object or a group of objects. Next, atom manipulators are scattered throughout the Earth to change objects in our current environment based on the timeline; and incrementally, change the current environment until the time travel date. Each atom manipulator is intelligent and manipulates the current environment as well as generating ghost machines to manipulate the current environment. Also, components of the practical time machine can be used to create technology for the purpose of: building cars, planes and rockets that travel at the speed of light, building intelligent weapons, creating physical objects from thin air, using a chamber to manipulate objects, building force fields, making objects invisible, building super powerful lasers, building anti-gravity machines, creating strong metals and alloys, creating the smallest computer chips, collecting energy without any solar panels or wind turbines, making physical DNA, manipulating existing DNA, making single cell organisms, controlling the software and hardware of computers and servers without an internet connection, and manipulating any object in the world.
Practical Time Machine Using Dynamic Efficient Virtual And Real Robots
Practical Time Machine Using Dynamic Efficient Virtual And Real Robots
Practical Time Machine Using Dynamic Efficient Virtual And Real Robots
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Owner:KWOK MITCHELL

Multi-core optical fiber, multi-core optical fiber cable, and multi-core optical fiber transmission system

ActiveUS20130301998A1Improved light confinementEffective calculationOptical fibre with multilayer core/claddingFibre mechanical structuresShortest distanceConditional expression
Multi-core optical fiber, multi-core optical fiber cable, and multi-core optical fiber transmission system
Multi-core optical fiber, multi-core optical fiber cable, and multi-core optical fiber transmission system
Multi-core optical fiber, multi-core optical fiber cable, and multi-core optical fiber transmission system
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Owner:SUMITOMO ELECTRIC IND LTD

Method and Apparatus for Multiple Scan Rate Swept Wavelength Laser-Based Optical Sensor Interrogation System with Optical Path Length Measurement Capability

ActiveUS20080296480A1Determination is accurate and reliableAccurate measurementRadiation pyrometryMaterial analysis by optical meansPotential measurementObservational error
Method and Apparatus for Multiple Scan Rate Swept Wavelength Laser-Based Optical Sensor Interrogation System with Optical Path Length Measurement Capability
Method and Apparatus for Multiple Scan Rate Swept Wavelength Laser-Based Optical Sensor Interrogation System with Optical Path Length Measurement Capability
Method and Apparatus for Multiple Scan Rate Swept Wavelength Laser-Based Optical Sensor Interrogation System with Optical Path Length Measurement Capability
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Owner:LUNA INNOVATIONS

Tissue pathlength resolved noninvasive analyzer apparatus and method of use thereof

InactiveUS20150018642A1Material analysis by optical meansAbsorption/flicker/reflection spectroscopyTemporal resolutionContact pressure
An analyzer apparatus and method of use thereof is configured to dynamically interrogate a sample. For example, an analyzer using light interrogates a tissue sample using a temporal resolution system on a time scale of less than about one hundred nanoseconds. Optionally, near-infrared photons are introduced to a sample with a known illumination zone to detection zone distance allowing calculation of parameters related to photon pathlength in tissue and / or molar absorptivity of an individual or group through the use of the speed of light and / or one or more indices of refraction. Optionally, more accurate estimation of tissue properties are achieved through use of: knowledge of incident photon angle relative to skin, angularly resolved detector positions, anisotropy, skin temperature, environmental information, information related to contact pressure, blood glucose concentration history, and / or a skin layer thickness, such as that of the epidermis and dermis.
Tissue pathlength resolved noninvasive analyzer apparatus and method of use thereof
Tissue pathlength resolved noninvasive analyzer apparatus and method of use thereof
Tissue pathlength resolved noninvasive analyzer apparatus and method of use thereof
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Owner:ZYOMED

Distance-measuring-device

ActiveUS20150362586A1Accurately determineAccurate distanceOptical rangefindersElectromagnetic wave reradiationTime windowsTime of flight
Distance-measuring-device
Distance-measuring-device
Distance-measuring-device
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Owner:APTIV TECH LTD

Multi-ocular camera system, device and synchronization method

InactiveCN104539931AAchieve precise synchronizationNo time wastedTelevision system detailsColor television detailsCable transmissionComputer hardware
The invention provides a multi-ocular camera system, a device and a synchronization method. The synchronization method comprises the following steps: a hardware signal generating device generates a synchronization signal, and simultaneously transmits the synchronization signal to a plurality of camera units through cables; the plurality of camera units receive the synchronization signal transmitted by the hardware signal generating device, and each camera unit is triggered by the synchronization signal to shoot a synchronous two-dimensional image; and a synchronous image matching device acquires the synchronous two-dimensional images shot by each camera unit, and synchronously matches the plurality of acquired synchronous two-dimensional images. According to the technical scheme provided by the invention, the hardware signal generating device transmits the generated synchronization signal to the plurality of camera units through the cables to shoot the synchronous two-dimensional images, and matching of the synchronous two-dimensional images is realized through the synchronous image matching device. The transmission speed of signal transmission through the cables is close to the speed of light, and time is hardly consumed, so that accurate synchronization of a plurality of camera units in a large-baseline multi-ocular camera system can be realized through transmission of the synchronization signal via the cables.
Multi-ocular camera system, device and synchronization method
Multi-ocular camera system, device and synchronization method
Multi-ocular camera system, device and synchronization method
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Owner:BEIJING DEEPGLINT INFORMATION TECH

High speed light emitting semiconductor methods and devices

ActiveUS8179937B2Improve featuresRecombine rapidlyLaser detailsElectric lighting sourcesElectricityOptical cavity
A method for producing a high frequency optical signal component representative of a high frequency electrical input signal component, includes the following steps: providing a semiconductor transistor structure that includes a base region of a first semiconductor type between semiconductor emitter and collector regions of a second semiconductor type; providing, in the base region, at least one region exhibiting quantum size effects; providing emitter, base, and collector electrodes respectively coupled with the emitter, base, and collector regions; applying electrical signals, including the high frequency electrical signal component, with respect to the emitter, base, and collector electrodes to produce output spontaneous light emission from the base region, aided by the quantum size region, the output spontaneous light emission including the high frequency optical signal component representative of the high frequency electrical signal component; providing an optical cavity for the light emission in the region between the base and emitter electrodes; and scaling the lateral dimensions of the optical cavity to control the speed of light emission response to the high frequency electrical signal component.
High speed light emitting semiconductor methods and devices
High speed light emitting semiconductor methods and devices
High speed light emitting semiconductor methods and devices
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Owner:QUANTUM ELECTO OPTO SYST +1

Time delay compensation method for self-adaptive optical fiber length in quantum key distribution system

InactiveCN106788849ASolve the problem of delay driftReduce bit errorsTime-division multiplexPhotonic quantum communicationProblem of timeTime delays
The invention provides a time delay compensation device and a time delay compensation method for the self-adaptive optical fiber length in a quantum key distribution system. The device comprises a sending terminal, a receiving terminal and a single optical fiber positioned between the sending terminal and the receiving terminal, wherein the sending terminal comprises a processor, a timer, a classic light laser, a synchronous light laser, a quantum light laser, an electrically-controlled attenuator, a wavelength division multiplexer and a classical light detector; the method comprises the steps of carrying out distance measurement on optical fiber channels, calculating time delay and compensating. According to the device and the method, in the quantum key distribution system, the relative time delay of synchronous light and quantum light is measured and calculated according to the different lengths of the optical fiber channels, and time delay compensation is then added into the sending terminal; the problem of time delay drift caused by the different transmission speeds of light sources with different wavelengths in the same optical fiber is solved by using an active compensation method, so that error codes are reduced, and the stability of system operation is even guaranteed.
Time delay compensation method for self-adaptive optical fiber length in quantum key distribution system
Time delay compensation method for self-adaptive optical fiber length in quantum key distribution system
Time delay compensation method for self-adaptive optical fiber length in quantum key distribution system
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Owner:北京信息科学技术研究院 +1

Method for detecting the load of items to be washed, and dishwasher machine

ActiveUS20100294311A1Increase clock frequencyProduced cost-effectivelyTableware washing/rinsing machine detailsAutomatic washing/rinsing machine detectionImage detectionEngineering
Method for detecting the load of items to be washed, and dishwasher machine
Method for detecting the load of items to be washed, and dishwasher machine
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Owner:BSH BOSCH & SIEMENS HAUSGERAETE GMBH

Systems for measuring backscattered light using finite speed of light

InactiveUS20100067007A1Optical rangefindersPolarisation-affecting propertiesPhysical separationSpeed of light
Systems for measuring backscattered light using finite speed of light
Systems for measuring backscattered light using finite speed of light
Systems for measuring backscattered light using finite speed of light
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Owner:UNITED STATES OF AMERICA THE AS REPRESENTED BY THE SEC OF THE ARMY

Two-way ranging between radio transceivers

ActiveUS20060083340A1Synchronisation arrangementDirection finders using radio wavesTransceiverTransmitter
Two-way ranging between radio transceivers
Two-way ranging between radio transceivers
Two-way ranging between radio transceivers
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Owner:MITSUBISHI ELECTRIC RES LAB INC

Ultra-short pulse mid-ir mode-locked laser

InactiveUS20160294149A1Significant probabilityImprove stabilityOptical resonator shape and constructionActive medium materialResonant cavityPulsed mode
Ultra-short pulse mid-ir mode-locked laser
Ultra-short pulse mid-ir mode-locked laser
Ultra-short pulse mid-ir mode-locked laser
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Owner:IPG PHOTONICS CORP

Laser scanner

InactiveUS20080151218A1Without reducing operating speedLess susceptibleOptical rangefindersElectromagnetic wave reradiationElectricityLaser scanning
A laser scanner which operates pursuant to the elapsed time principle and which has a pulsed laser that directs successive light pulses into a monitored region. The laser scanner further has a light receiving arrangement for receiving light pulses reflected by an object in the monitored region and that generates electric received signals which are fed to an evaluation unit for determining a distance between the object and the laser scanner based on the elapsed time between the emission of the light pulse and the receipt of the reflected pulse and the speed of light from which a distance signal is formed that is representative of the distance between the object and the scanner. There is a light diverter unit between the pulsed laser and the monitored region which continuously directs light pulses along different directions into the monitored region. A light source is provided which emits a light measuring signal of reduced strength which is also continuously directed into the monitored region in continuously changing directions. The light receiving arrangement is configured to receive the light measuring signal reflected by the object in the monitored region and to generate a reflection signal that is representative of the reflection characteristics of the object. The light pulses and the receiving signals are changeable in dependency of the reflection signal.
Laser scanner
Laser scanner
Laser scanner
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Owner:SICK AG

Quick response twisted nematic liquid crystal display and method

ActiveCN101644843AQuick responseAdapt to the requirements of field sequential color displayStatic indicating devicesNon-linear opticsLiquid-crystal displayDisplay device
Quick response twisted nematic liquid crystal display and method
Quick response twisted nematic liquid crystal display and method
Quick response twisted nematic liquid crystal display and method
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Owner:SHENZHEN AV DISPLAY

Optical Velocimetry Systems and Methods for Determining the Velocity of a Body Using Fringes Generated by a Spatial Light Modulator

InactiveUS20140063484A1Avoid reflectionsHinders its propagationDevices using time traversedDevices using optical meansSpatial light modulatorModulation pattern
A velocimetry system for measuring the velocity of a moving body propagating through a measurement volume includes a light source for emitting a light beam, a controller for generating a modulation pattern corresponding to a desired set of fringes to be generated in the measurement volume, and a spatial light modulator operatively connected to the controller to receive therefrom the modulation pattern. The spatial light modulator is configured to spatially modulate the light beam according to the modulation pattern in order to generate the desired set of fringes in the measurement volume. Also provided are a light detector for measuring the energy of the light scattered by the moving body as it intersects the fringes, and a data analysis unit operatively connected to the light detector and adapted to determine the velocity of the moving body from at least one fringe characteristic and the energy of the scattered light measured.
Optical Velocimetry Systems and Methods for Determining the Velocity of a Body Using Fringes Generated by a Spatial Light Modulator
Optical Velocimetry Systems and Methods for Determining the Velocity of a Body Using Fringes Generated by a Spatial Light Modulator
Optical Velocimetry Systems and Methods for Determining the Velocity of a Body Using Fringes Generated by a Spatial Light Modulator
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Owner:DANTEC DYNAMICS

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