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36results about How to "Correct fluctuation" patented technology
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Radiation imaging apparatus, radiation imaging system, and correction method
ActiveUS20070131843A1Accurate signalEliminate the effects ofTelevision system detailsPhotometry using reference valueRadiation imagingRadiography
The invention intends to be able to adequately perform a gain correction. Hence, at the time of radiographing an object, a gain correction of the object image is performed based on a gain correction image (XRc1) derived by performing a light reset. On the other hand, at the time of radiographing an object, when a light reset is not performed, a gain correction of the object image is performed based on a gain correction image (XRc2) derived without performing the light reset.
Owner:CANON KK
Pixel clock generating device, laser scanning device, and image forming device
InactiveUS6927789B2Simple configurationCorrect fluctuationElectrographic process apparatusPrintingComputer hardwareImage formation
A pixel clock generating device includes a measurement unit that measures a scanning time required for scanning a length and outputs a measured value, a pixel clock generating unit that generates a pixel clock, and a reference clock generating unit that generates a reference clock having a frequency higher than the pixel clock. A phase of the pixel clock is controlled based on (i) the reference clock and (ii) a comparison result between the measured scanning time and a preset scanning time.
Owner:RICOH KK
Variable optical-property element and optical apparatus including the same
InactiveUS7369327B1No loss in amountSimple structureEndoscopesCamera body detailsOptical propertyRefractive index
A variable optical-property element includes a liquid crystal the pitch of twist is less than 60 times the wavelength of light used, so that a spatially uneven electric or magnetic field or temperature is applied to the liquid crystal to thereby form an index distribution, and the electric or magnetic field or the temperature is changed to thereby alter the index distribution. In this way, the variable optical-property element is capable of changing its optical properties as a liquid crystal lens and is used in an optical apparatus.
Owner:OLYMPUS CORP
Pixel clock creation method, pixel clock creation device, optical scanning device, and image forming apparatus
InactiveUS7212224B2Improve accuracySimple compositionVisual representatino by photographic printingPrintingComputer scienceOptical scanning
Owner:RICOH KK
Radiation imaging apparatus and radiation imaging system
ActiveUS7732778B2Accurate signalEliminate the effects ofTelevision system detailsPhotometry using reference valueRadiation imagingRadiography
Owner:CANON KK
Ultrasound imaging apparatus
InactiveUS20140240482A1Reduce the amount of calculationAccurate estimateUltrasonic/sonic/infrasonic diagnosticsTelevision system detailsPattern recognitionUltrasound imaging
A weight value used for a beamforming process performed on received signals in an ultrasound imaging apparatus is obtained with a small amount of computations and with a high degree of precision, even when a method of adaptive signal processing is employed.Multiple elements 401 receive ultrasound signals from a test subject, and the similarity operator 404 obtains the similarity between the received signals x(n). By using the similarity C(n) between the received signals obtained by the similarity operator 404, the adaptive weight operator 407 computes the adaptive weight w(n) in association with the similarity. The beamforming operator 408 uses the adaptive weight w(n) and the received signal x(n) to generate a beamforming output. The imaging processor 108 uses the beamforming output to generate image data. By way of example, the similarity operator 404 performs computations of the similarity in the time direction.
Owner:HITACHI LTD
Controller of internal combustion engine
ActiveUS7448360B2Easy to controlSmooth startAnalogue computers for vehiclesElectrical controlCombustionTop dead center
Owner:DENSO CORP
Diagnostic system
ActiveUS20140185907A1Shorten timeEasily discriminateImage enhancementImage analysisImage basedDiagnostic system
A diagnostic system comprises a spectral image pickup means that picks up a spectral image in a predetermined wavelength region in a body cavity and obtains spectral image data, an image processing means that obtains, from the spectral image data, an index-value for discriminating between a diseased portion and a healthy portion, and generates and outputs an indicator image based on the index-value, and a monitor on which the indicator image is displayed, wherein, for each pixel of the spectral image, the image processing means defines β obtained by a predetermined expression as the index-value, while using the spectral image data P1 at a first wavelength which is around a wavelength of 542 nm, the spectral image data P2 at a second wavelength which is around a wavelength of 558 nm and the spectral image data P3 at a third wavelength which is around a wavelength of 578 nm.
Owner:HOYA CORP
Image forming apparatus and color deviation correcting method and program
ActiveUS20090147286A1Quality improvementSmall color differenceDigitally marking record carriersDigital computer detailsImage formationOperation mode
The invention has an image forming apparatus with a deviation amount calculator for obtaining, by an arithmetic operation, by an arithmetic operation, the deviation amount between the laser beam irradiating positions for each color, under the condition that the deviation amount increases gradually according to a time lapse in at least one of the plurality of operating modes, according with a further time lapse, the deviation amount between the laser beam irradiating positions for each color decreases gradually, and according with a further time lapse, the deviation amount between the laser beam irradiating positions for each color is converged.
Owner:CANON KK
Projection zoom lens and projection type display device
ActiveUS20150241669A1Correct fluctuationHigh zoom ratioDiffraction gratingsOphthalmologyDisplay device
A projection zoom lens constituted by: a negative first lens group; a positive final lens group; and moving lens groups between the first and the final lens groups that move independently while changing magnification, satisfies the conditional formulae below:1.00<(Rf2−Rr2) / (Rf2+Rr2) (1)0.00≦(Rr2−Rf3) / (Rr2+Rf3)<0.15 (2)2.5<Bf / Imφ (9)wherein Rf2 and Rr2 respectively are the radii of curvature of the front and rear surfaces of the second lens from the magnification side within the most reduction side moving lens group, Rf3 is the radius of curvature of the front surface of the third lens from the magnification side within the most reduction side moving lens group, Bf is the back focus of the entire system at the reduction side at the wide angle end as an air converted length, and Imφ is the maximum effective image circle diameter at the reduction side.
Owner:FUJIFILM CORP
Controller of internal combustion engine
ActiveUS20070051342A1Easy to controlSmooth startAnalogue computers for vehiclesElectrical controlCombustionTop dead center
A rotation speed calculation interval is set near a combustion top dead center of each cylinder of an engine. An interval rotation time necessary for a crankshaft to rotate through the rotation speed calculation interval is calculated as angular speed information of the crankshaft in the rotation speed calculation interval for each combustion stroke of the engine. Engine rotation speed is calculated based on the interval rotation time. The angular speed information of the crankshaft in the rotation speed calculation interval set near the combustion top dead center reflects a combustion state or generated torque. By calculating the engine rotation speed based on the angular speed information, the engine rotation speed highly correlated with the combustion state or the generated torque of the engine can be calculated.
Owner:DENSO CORP
Pixel clock creation method, pixel clock creation device, optical scanning device, and image forming apparatus
InactiveUS20050099489A1High precisionSimple compositionVisual representatino by photographic printingPrintingHigh frequencyOptical scanning
In a pixel clock creation method and device, a high frequency clock is created. A scanning time needed to scan a predetermined scanning length is detected in accuracy of half a period of the high frequency clock to output a detection value indicating the detected scanning time. The detection value and a predetermined target value are compared to output a comparison result. A phase data is created based on the comparison result. A pixel clock whose phase is controlled based on both the high frequency clock and the phase data is created.
Owner:RICOH KK
Electrospinning device and method
ActiveUS20190119830A1Easy to controlAccurate measurementArtificial thread manufacturing machinesElectro-spinningFiberElectrospinning
An electrospinning device is provided with a container for holding a liquid comprising a polymer melt or a polymer solution, and a nozzle arranged to outlet a stream of the liquid from the container. A collector collects electro spun material during electrospinning so as to form a fibrous structure. The device comprises an optical measurement system that measures a baseline distance between the collector and the optical measurement system for at least one location on a surface of the collector, and also measures a momentary distance between the optical measurement system and a momentary top layer of the fibrous structure during the electrospinning process. A processor calculates a momentary thickness of the fibrous structure. Once a required thickness is reached the electrospinning can be stopped.
Owner:INNOVATIVE MECHANICAL ENG TECH BV
Time-of-flight type mass spectrometer
ActiveUS9048075B1Improve quality resolutionLarge energySpectrometer circuit arrangementsTime-of-flight spectrometersMass analyzerAuxiliary electrode
A time-of-flight type mass spectrometer in which, at the time when ions are generated by irradiating a sample with a laser beam, an extraction electric field having a potential gradient that decreases gradually from a sample plate toward an extraction electrode is formed. Ions are roughly separated in accordance with the m / z in the extraction region due to the effect of this electric field, and ions with a large m / z remain near the sample. The voltages applied to the sample plate and an auxiliary electrode are increased after a delay time has passed so as to form an acceleration electric field having a potential gradient with a polygonal line pattern. Since this electric field is similar to an ideal potential gradient curve, it is possible to provide the ions with appropriate potential energy changes for each m / z, improving resolution by appropriately realizing energy convergence over a wide m / z range.
Owner:SHIMADZU CORP
Laser pulse temporal, spectral and spatial shaping devices based on volume diffractive gratings with spatially variable parameters
InactiveUS8724207B1Increase delay timeReduce latencyLaser detailsNon-linear opticsTime domainChirped pulse amplification
Recent invention of longitudinally chirped volume Bragg gratings has dramatically changed a design of high power femtosecond lasers. Replacing of bulky pairs of conventional surface gratings with compact and robust chirped volume Bragg gratings for stretching and compression of laser pulses in chirped-pulse-amplification systems enabled decrease of size and weight of those systems by several times. The methods and devices enable substantial increase of stretching time and compression to shorter pulses, enhancement of stretched and compressed beams quality by stationary or dynamic shaping of gratings, and shaping of laser pulses in both temporal and spectral domains.
Owner:UNIV OF CENT FLORIDA RES FOUND INC +1
Polarizing plate comprising polymer film and polarizing membrane
InactiveUS6859242B2Excellent optical propertiesIncreased durabilityPolarising elementsNon-linear opticsTransmittancePolarizer
Owner:FUJIFILM CORP
Electron beam apparatus
InactiveUS20110114853A1Improve performanceCorrect fluctuationStability-of-path spectrometersMaterial analysis using wave/particle radiationPower flowParticle physics
An electron beam lithography apparatus includes a beam current detector which detects, during drawing of the drawing data, fluctuation of an irradiation position of the electron beam at non-irradiation on the substrate; a beam position error detector which detects a beam position error of the electron beam based on the fluctuation of the irradiation position; a drive position error detector which detects a drive position error of the stage due to rotation and translation drive during drawing of the drawing data; and a corrector which corrects the irradiation position of the electron beam during the drawing based on the beam position error and the drive position error.
Owner:NUFLARE TECH INC
Angular Velocity Measuring Device and Relative Angular Velocity Measuring Device
InactiveUS20180088144A1Easy and effectiveAccurate calculationDevices using electric/magnetic meansMeasurement deviceAngular velocity
An angular velocity measuring device measures an angular velocity of a gear that is fixed to a rotary shaft. The angular velocity measuring device includes a pair of magnetic sensors that are arranged at positions facing a tooth flank of the gear and that detect a shape of the tooth flank in a noncontact manner, and a computation unit that is configured to generate a waveform obtained by synthesizing output detection signals of the pair of the magnetic sensors with each other and output an output waveform and calculate the angular velocity of the gear from the output waveform. The magnetic sensors are arranged such that the output detection signals are offset from each other by {(n−1)+(⅙)} pitches when one pitch is defined as one cycle of the shape of the tooth flank in a circumferential direction of the gear.
Owner:TOYOTA JIDOSHA KK
Image forming apparatus
InactiveUS20130141511A1Correct fluctuationSimple configurationRecording apparatusElectrographic process apparatusEngineeringElectrical and Electronics engineering
An image forming apparatus includes a photosensitive member, a charging unit configured to charge the photosensitive member, an exposure unit configured to expose the charged photosensitive member with first laser power to generate a non-image portion potential in a non-image portion of the photosensitive member and with second laser power different from the first laser power to generate an image portion potential in an image portion of the photosensitive member, a development unit configured to form a developer image by applying a developer to a portion of the image portion potential, a control unit configured to control the laser power of the exposure unit, and a storage unit configured to store information about the photosensitive member obtained when the photosensitive member is brand-new. The control unit changes an output of the first laser power according to the information about the photosensitive member stored in the storage unit.
Owner:CANON KK
Image recording apparatus and method of adjusting recording head in image recording apparatus
InactiveUS20110205281A1Correct fluctuationImprove accuracyInking apparatusPower drive mechanismsImage recordingRecording head
The image recording apparatus includes: a recording head in which a plurality of recording elements are arranged over a length corresponding to a recordable width of a recording medium; a conveyance device which performs conveyance to cause the recording head and the recording medium to move relatively to each other one time only in a conveyance direction, a reference line being arranged on the conveyance device; an image output device which records a prescribed image on the recording medium through the recording head; a sensor which reads the reference line on the conveyance device, and reads the prescribed image on the recording medium recorded by the image output device; and a displacement evaluation device which evaluates a displacement between the reference line and the recording head in accordance with a result of reading the reference line by the sensor and a result of reading the prescribed image by the sensor.
Owner:FUJIFILM CORP
Image recording apparatus and method of adjusting recording head in image recording apparatus
InactiveUS8636332B2Improve accuracyCorrect fluctuationInking apparatusPower drive mechanismsImage recordingOutput device
The image recording apparatus includes: a recording head in which a plurality of recording elements are arranged over a length corresponding to a recordable width of a recording medium; a conveyance device which performs conveyance to cause the recording head and the recording medium to move relatively to each other one time only in a conveyance direction, a reference line being arranged on the conveyance device; an image output device which records a prescribed image on the recording medium through the recording head; a sensor which reads the reference line on the conveyance device, and reads the prescribed image on the recording medium recorded by the image output device; and a displacement evaluation device which evaluates a displacement between the reference line and the recording head in accordance with a result of reading the reference line by the sensor and a result of reading the prescribed image by the sensor.
Owner:FUJIFILM CORP
Display Device
ActiveUS20090021670A1Correct fluctuationAccurate measurementStatic indicating devicesNon-linear opticsDisplay deviceEngineering
A TFT element for ambient light detection and a TFT element for temperature detection are connected in series. In a first period, a first switch element is off, and a second switch element is at a hi side, so that a threshold voltage of the TFT element for temperature detection is detected. In a second period, a first switch element is on, and a second switch element is at a low side, so that temperature is detected. In a third period, a first switch element is on, and a second switch element is at a hi side, so that ambient light is detected. An input voltage and a control voltage to each of the TFT elements are set by a voltage controller provided in a drive circuit based on the threshold voltage.
Owner:JAPAN DISPLAY INC +1
Projection zoom lens and projection type display device
ActiveUS9557538B2Correct fluctuationHigh zoom ratioDiffraction gratingsDisplay deviceOptoelectronics
A projection zoom lens constituted by: a negative first lens group; a positive final lens group; and moving lens groups between the first and the final lens groups that move independently while changing magnification, satisfies the conditional formulae below:1.00<(Rf2−Rr2) / (Rf2+Rr2) (1)0.00≦(Rr2−Rf3) / (Rr2+Rf3)<0.15 (2)2.5<Bf / Imφ (9)wherein Rf2 and Rr2 respectively are the radii of curvature of the front and rear surfaces of the second lens from the magnification side within the most reduction side moving lens group, Rf3 is the radius of curvature of the front surface of the third lens from the magnification side within the most reduction side moving lens group, Bf is the back focus of the entire system at the reduction side at the wide angle end as an air converted length, and Imφ is the maximum effective image circle diameter at the reduction side.
Owner:FUJIFILM CORP
Polarizing plate comprising polymer film and polarizing membrane
InactiveUS20030234898A1Correct fluctuation of polarizing degreeExcellent optical propertiesPolarising elementsNon-linear opticsTransmittancePolarizer
A polarizing plate comprises a polymer film and a polarizing membrane. The polymer film has a slow axis, and the polarizing membrane has a transmission axis. The polymer film and the polarizing membrane are arranged to orient the slow axis of the polymer film essentially at 45° to the transmission axis of the polarizing membrane. The polarizing membrane has a transmittance of 30 to 50% and a polarizing degree of 90 to 100%. When light having a wavelength of 450 nm is incident on the polarizing membrane, the ratio of the transmittance in a direction parallel to the transmission axis to the transmittance in a direction perpendicular to the transmission axis (T / / (450) / T⊥(450)) satisfies the following formula (I). When light having a wavelength of 590 nm is incident on the polarizing membrane, the ratio of the transmittance in a direction parallel to the transmission axis to the transmittance in a direction perpendicular to the transmission axis (T / / (590) / T⊥(590)) satisfies the following formula (II). 0.6<=T / / (450) / T⊥(450)<=1.5 (I) 0.6<=T / / (590) / T⊥(590)<=1.5 (II)
Owner:FUJIFILM CORP
Device and method for controlling the optical power in a microscope
ActiveUS7045772B2Easy to adjustImprove accuracyPhotometry using reference valueBeam/ray focussing/reflecting arrangementsMeasurement deviceOptical power
An apparatus for controlling optical power in a microscope includes a measuring device for measuring the optical power, and a control unit for controlling a high-frequency source as a function of the measured optical power so as to achieve a selectable level of the optical power. The microscope includes a source providing light along an illumination beam path to a sample, a detector receiving detection light lead along a detection beam path from the sample, and an acousto-optical or electro-optical element located in the illumination beam path and driven by the high-frequency source.
Owner:LEICA MICROSYSTEMS CMS GMBH
Image recording apparatus
InactiveUS7626722B2Enable formationCorrect fluctuationDigitally marking record carriersInking apparatusOpto electronicImage recording
There is provided an image recording apparatus able to form images without fluctuation of image dot intervals in the main scan direction.The image recording apparatus comprises a light emitting source including multiple light emitting units emitting laser beams, and a detection unit for detecting the laser beams and measuring intervals of the laser beams in the main scan direction. Based on the measured intervals of the laser beams in the main scan direction, light emission timings of the light emitting units are adjusted so that the intervals between each two image dots on the photoconductor in the main scan direction are not influenced by the interval fluctuation of the laser emitting units.
Owner:RICOH KK
Method for online measurement of a plasticizer in an endless filter rod and a device for producing an endless filter rod of the tobacco processing industry
ActiveUS20150012228A1Long-term changeAccurate measurementResistance/reactance/impedenceCigarette manufacturePlasticizerResonance shift
A method for online measurement of a plasticizer in an endless filter rod, includes: measuring a resonance shift (A) and line broadening (B) with a microwave resonator at a passing endless filter rod, determining a mass per length of plasticizer from the measurement variables (A, B), measuring a reference mass of plasticizer applied per time with the application of the plasticizer onto the filter tow band, determining an averaged reference mass per length of plasticizer from the measured mass applied over a time period, averaging the values for mass per length of plasticizer, determined using the measurement variables over the same time in which the reference mass of plasticizer is determined, determining a deviation between the averaged reference value for the mass per length and averaged mass per length and correcting the mass per length, determined from the measurement variables of the microwave resonator, according to the determined deviation.
Owner:TEWS ELEKTRONIK GMBH & CO KG
Magnetic head positioning control method and magnetic head positioning control apparatus
InactiveUS20090244768A1Sufficient accuracyAccurate position controlTrack finding/aligningRecord information storageMagnetic disksHead position
N groups of servo patterns, each corresponding to the predetermined number of servo sectors, are recorded in a magnetic disk. The magnetic head positioning control apparatus of the present invention produces an RRO current correction table corresponding to each group of servo patters and selects the group of servo patterns that is the best in transferred quality of the sevro pattern as SPopt. For servo sectors (target servo sectors) corresponding to other groups of servo patterns and existing between two adjacent servo sectors corresponding to the SPopt, the magnetic head positioning control apparatus calculates an RRO current correction amount corresponding to the target servo sector by a linear interpolation calculation using the RRO current correction amount corresponding to each of the adjacent servo sectors in the RRO current correction table corresponding to the SPopt to perform the magnetic head positioning control based on the calculated RRO current correction amount.
Owner:FUJITSU LTD
Image processing device
ActiveUS9191589B2Enhance the imageCorrect fluctuationImage enhancementTelevision system detailsImaging processingReference image
Owner:KOKUSA ELECTRIC CO LTD
Ultrasound imaging apparatus
InactiveUS9754185B2Reduce the amount of calculationAccurate estimateTelevision system detailsImage analysisPattern recognitionUltrasound imaging
A weight value used for a beamforming process performed on received signals in an ultrasound imaging apparatus is obtained with a small amount of computations and with a high degree of precision, even when a method of adaptive signal processing is employed.Multiple elements 401 receive ultrasound signals from a test subject, and the similarity operator 404 obtains the similarity between the received signals x(n). By using the similarity C(n) between the received signals obtained by the similarity operator 404, the adaptive weight operator 407 computes the adaptive weight w(n) in association with the similarity. The beamforming operator 408 uses the adaptive weight w(n) and the received signal x(n) to generate a beamforming output. The imaging processor 108 uses the beamforming output to generate image data. By way of example, the similarity operator 404 performs computations of the similarity in the time direction.
Owner:HITACHI LTD
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