Entries |
Document | Title | Date |
20080203283 | OPTICAL ENCODER WITH DETECTOR LENS - An optical encoder of a transmissive optical encoding system is disclosed. The optical encoder includes an emitter, a detector, and a detector lens. The emitter includes a light source and a collimating lens. The detector includes a plurality of photosensors to detect light from the emitter. The detector lens is aligned with the plurality of photosensors to direct the light toward the plurality of photosensors. Embodiments of the optical encoder provide an increased effective sensing area, increased power delivery to the detector, and increased encoder life. | 08-28-2008 |
20080245956 | PHOTODETECTOR ARRAY AND CODEWHEEL CONFIGURATION FOR FLEXIBLE OPTICAL ENCODER RESOLUTION - An optical encoder includes a coding element having a track with multiple transparent sections, a light source positioned to output light to the track, and a photodetector array, positioned to detect light that passes through the transparent sections of the track. The photodetectors of the photodetector array have larger width dimensions than the width dimensions of the transparent sections of the track. Resolution of the optical encoder may be adjusted by changing the resolution of the coding element. | 10-09-2008 |
20080277569 | OPTICAL ENCODER - In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enter a light emitting portion of the light source and a reflecting portion around the light emitting portion. | 11-13-2008 |
20080315077 | SCANNING UNIT FOR AN OPTICAL POSITION-MEASURING DEVICE - A scanning unit for an optical position-measuring device includes a semiconductor light source and at least one downstream reflector element that has a defined optical effect on the beams of rays emitted by the semiconductor light source. The optically active surface of the reflector element is arranged in subregions to be reflection-preventive such that no beams of rays are reflected back from the reflector element into the semiconductor light source. | 12-25-2008 |
20090008538 | OPTICAL ENCODER AND ITS MANUFACTURING METHOD - An optical encoder comprises a sensor head including a light source and a photodetector and a scale that moves relative to the sensor head. The light emitted from the light source is reflected, transmitted or diffracted by the scale, and the reflected, transmitted or diffracted light is received by the photodetector to allow the sensor head to output a displacement signal. The sensor head includes a wiring substrate having electrodes formed thereon and on which the light source and photodetector are disposed at predetermined positions and a light transmitting material that covers the wiring substrate, light source, and photodetector. A side plane obtained by cutting the wiring substrate and light transmitting material at the same time in the direction substantially perpendicular to the light receiving surface of the photodetector serves as a reference position related to disposition of the components to be mounted on the wiring substrate. | 01-08-2009 |
20090032691 | PHOTOELECTRIC ENCODER AND ELECTRONIC EQUIPMENT USING THE SAME - In a photoelectric encoder, each of light receiving elements ( | 02-05-2009 |
20090057542 | ABSOLUTE ENCODER UTILIZING LIGHT OF DIFFERENT WAVELENGTHS TO RECUDE CROSS TALK - An encoder having a code scale, an illumination system, and a plurality of photodetectors is disclosed. The code scale has a plurality of tracks that are illuminated by the illumination system. Each photodetector receives light from a corresponding one of the tracks and generates a signal indicative of a quantity of light received from that track. Each photodetector is limited to detecting light in a band of wavelengths corresponding to that track. Each track generates light in a band of wavelengths corresponding to that track, and the band of wavelengths corresponding to one of the tracks is different from the band of wavelengths corresponding to the tracks that are next to that track. The tracks can include alternating reflective and absorptive stripes, alternating transmissive and reflective stripes, or alternating luminescent and absorptive stripes. | 03-05-2009 |
20090084945 | PHOTODIODE ARRAY FOR AN OPTICAL ENCODER, PHOTODIODE DETECTION SYSTEM, AND OPTICAL ENCODER - A photodiode detector array for an optical encoder includes a sequence of photodiodes having a pitch between adjacent photodiodes that alternates between a first pitch and a second pitch, the second pitch being different than the first pitch. | 04-02-2009 |
20090090851 | SHAFT-MOUNTED DETECTOR FOR OPTICAL ENCODER - A transmissive optical encoder is disclosed. The transmissive optical encoder includes a detector, a code wheel, and an emitter. The detector includes an aperture through the detector. The aperture is configured to receive a rotary shaft of a motor. The code wheel is coupled to the rotary shaft of the motor. Rotation of the rotary shaft results in corresponding rotation of the code wheel. The emitter is configured to emit a light signal through the code wheel toward the detector. Rotation of the code wheel results in modulation of the light signal at the detector. Embodiments of the transmissive optical encoder consume relatively little space and facilitate alignment of the emitter and detector. | 04-09-2009 |
20090127446 | Optical Encoder Apparatus for Removable Connection with Printed Circuit Board and Methods of Assembling Optical Encoder - There is disclosed optical encoder apparatus for removable connection with a printed circuit board. In an embodiment, the apparatus includes a light emitting component, a light detecting component, a mounting component for attaching the light emitting component thereon, and another mounting component for attaching the light detecting component thereon, wherein each of the mounting components have a removable connection with the printed circuit board. A method of assembling optical encoder apparatus is disclosed. In an embodiment, the method includes attaching a light emitting component and a terminal of a first mounting component to one another; attaching a light detecting component and a terminal of a second mounting component to one another; attaching a terminal of the first mounting component to a printed circuit board; and attaching a terminal of the second mounting component to the printed circuit board. Other embodiments are also disclosed. | 05-21-2009 |
20090134317 | SENSOR AND METHOD FOR DETERMINING AN ANGULAR POSITION OF A ROTOR - A sensor for sensing the angular position of a rotor includes a code disk rotatable with the rotor. A first light guide is rotatable with the rotor. The light guide directs light from a light source through the code disk to a detector. A second light guide has first and second arms directing light from a light source to the detector. A light modulator modulates the light directed from one of the first and second arms to the detector. A method for determining the angular position of the rotor includes providing the code disk with a plurality of individual designation areas located near the outer peripheral edge of the disk. Each designation area has a plurality of digital bits. The detector detects the digital bits from a selected portion of the code disk. The selected portion is functionally related to the angular position of the rotor. A bit center is determined for each bit of the selected portion. The bit is determined to be a 1 or a 0 by determining a value related to the bit based on the determined bit center and comparing the determined value against a threshold. The determined 1's and 0's are monitored to identify a code word. The angular position of the rotor is identified based upon the identified code word. | 05-28-2009 |
20090159787 | ENCODER HAVING AN OVERMOLDED COVER, ENCODER SYSTEM WITH AN ENCODER HAVING AN OVERMOLDED COVER, AND METHOD FOR MANUFACTURING AN ENCODER HAVING AN OVERMOLDED COVER - An encoder includes a rotor including: a shaft and a code disk attached to the shaft; a stator including a scanning unit configured to generate an electrical signal corresponding to an angular position of the code disk; a cable configured to transfer the electrical signal; and a cover overmolded onto the stator, where the scanning unit is sealed from an outer environment by the cover. | 06-25-2009 |
20090206244 | Single Track Optical Encoder - Disclosed are various embodiments of a reflective optical encoder having at least three channels—two data channels and one index channel—disposed along a common axis or single track. The single track configuration disclosed herein permits very high resolution reflective optical encoders in small packages to be provided. In addition, the single track configuration reduces problems with misalignment between code scales and light detectors, permits relatively simple electronic circuitry to be used to process outputs, and reduces manufacturing, assembly, integrated circuit and encoder costs. Methods of making and using such optical encoders are also disclosed. | 08-20-2009 |
20090236507 | SHAFT-MOUNTED DETECTOR FOR OPTICAL ENCODER - A transmissive optical encoder is disclosed. The transmissive optical encoder includes a detector, a code wheel, and an emitter. The detector includes an aperture through the detector. The aperture is configured to receive a rotary shaft of a motor. The code wheel is coupled to the rotary shaft of the motor. Rotation of the rotary shaft results in corresponding rotation of the code wheel. The emitter is configured to emit a light signal through the code wheel toward the detector. Rotation of the code wheel results in modulation of the light signal at the detector. Embodiments of the transmissive optical encoder consume relatively little space and facilitate alignment of the emitter and detector. | 09-24-2009 |
20090283667 | ABSOLUTE POSITION LENGTH MEASUREMENT TYPE ENCODER - An absolute position length measurement type encoder includes: a scale in which an ABS pattern based on a pseudorandom code is provided; a light-receiving element for receiving bright and dark patterns formed by the scale; and a signal processing circuit for processing signals subjected to output of the light-receiving element and measuring an absolute position of the scale to the light-receiving element, wherein the signal processing circuit includes a space-dividing number conversion circuit that obtains finer intervals D than the array interval P | 11-19-2009 |
20090294637 | Absolute position detection type photoelectric encoder - In an absolute position detection type photoelectric encoder devised so as to detect a pseudorandom pattern disposed on a main scale by means of a plurality of imaging optical systems, assembling of the absolute position detection type photoelectric encoder is facilitated and production cost thereof is reduced by providing: a single light-receiving array element disposed on the imaging surfaces of the imaging optical systems, which incorporates a greater light-receiving array portion in the length measurement direction than the light-receiving range of the respective imaging optical systems; a window signal storing portion for storing a window signal showing a light-receiving range of the respective imaging optical systems; and a window signal comparison portion for obtaining signals corresponding to individual imaging ranges by comparing scanning signals of the light-receiving array element with window signals. | 12-03-2009 |
20090314930 | ENCODER HOME POSITION SIGNAL PROCESSING METHOD AND SYSTEM - An encoder position signal processing system comprises an analog encoder reader and a codewheel. The codewheel possesses an optical track that modulates the quadrature encoder signal amplitude in order to generate an amplitude change (home pulse) once per revolution of the codewheel. The analog encoder reader outputs a quadrature signal comprised of sine and cosine signals. The quadrature signal is converted to a magnitude signal that is sampled in order to generate a rate of change (ROC) signal, which increases the signal-to-noise ratio. An algorithm using the characteristic shape of the ROC home pulse signal can then be applied to the ROC signal to increases robustness of detecting the home pulse. | 12-24-2009 |
20090321621 | OPTICAL ENCODER - An optical encoder, with a simple structure, that can output a high-precision origin signal is provided. | 12-31-2009 |
20100019135 | ROTARY ENCODER FOR CONNECTING ADDITIONAL SENSORS AND ELECTRICAL MACHINE COMPRISING A ROTARY ENCODER OF THIS TYPE - The invention relates to a rotary encoder ( | 01-28-2010 |
20100038527 | Rotary Push On Encoder - Rotary encoders with push on components for determining speed and/or position of a rotating shaft are described. Also described are features for indexing an encoder to a shaft position. | 02-18-2010 |
20100051792 | ABSOLUTE-TYPE ENCODER AND METHOD FOR DETECTING ABSOLUTE POSITION - An absolute-type encoder includes an absolute-type encoder wheel. The absolute-type encoder wheel includes a primary optical grating unit and two secondary optical grating units, wherein the two secondary optical grating units are arranged outside and inside the primary optical grating unit and contain one less optical grating than that of the primary optical grating unit. The encoder wheel is rotated to find a zero point in the light detection signal of the secondary optical grating unit, and a corresponding light detection value of the primary optical grating unit is also determined based on the zero point. The absolute position of the encoder wheel can be calculated with reference to the corresponding light detection value. The absolute-type encoder can also be used as an incremental-type encoder to provide more versatility. | 03-04-2010 |
20100133423 | OUT-OF-ROUND CODER - Device for detection of out-of-round on an angle sensor including a disc supporting angle coding means rigidly attached to a rotating shaft and at least one fixed optical system including a coherent light source emitting a beam interfering with the angle coding means of the support disc in order to code its angular position, means for collimation of the said beam before interference and a photodetector of the modulated beam after interference. In accordance with one possibility, it includes two optical systems arranged 90° from each other. | 06-03-2010 |
20100148044 | ELECTRONIC DEVICE HOUSING - An electronic device housing includes a metallic base part | 06-17-2010 |
20100181468 | ROTARY ENCODER - [Problems to be Solved] To provide a rotary encoder capable of carrying out self-calibration for a horizontal encoder as well as a vertical encoder without requiring special equipment and simply and inexpensively with a high degree of accuracy while reducing the burden on a worker. | 07-22-2010 |
20100181469 | ANGULAR CORRECTION METHOD FOR ROTARY ENCODER - [Object] To provide an angular correction method with which angular skip does not occur in determining an angle between angular graduations of a dial of a rotary encoder by interpolation calculation. | 07-22-2010 |
20100213359 | MEASURING APPARATUS AND MEASURING METHOD FOR MEASURING AXIS TILT OF SHAFT OF MOTOR FOR POLYGON MIRROR - A measuring apparatus includes a light source emitting a measuring light, a first photo-detection element directly receiving a part of a reflected light of the measuring light reflected from a shaft to be measured to detect a first light receiving position, and a second photo-detection element directly receiving another part of the reflected light to detect a second light receiving position. An axis tilt angle of the shaft is measured on the basis of a signal output from the first photo-detection element and a signal output from the second photo-detection element. | 08-26-2010 |
20100301195 | High Resolution Single Track Optical Encoder - Disclosed are various embodiments of a single track reflective optical encoder featuring increased spatial resolution, reduced cross-talk between adjoining photodiodes, and increased amplitude output signals from individual photodiodes. With respect to prior art single track optical encoders, some photodiodes are removed from a photodiode array, while nevertheless maintaining appropriate phase relationships between pairs of A and A\, and B and B\, photodiodes. Such a configuration of photodiodes results in increased inter-photodiode spacing, and thereby permits spatial resolution to be increased while boosting current outputs from individual photodiodes. The single track optical encoder configurations disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. In addition, the single track configuration reduces problems with misalignment between code scales and light detectors, permits relatively simple electronic circuitry to be used to process outputs, and reduces manufacturing, assembly, integrated circuit and encoder costs. Methods of making and using such optical encoders are also disclosed. | 12-02-2010 |
20100314532 | Optical Encoder Systems, Devices and Methods - Disclosed are various embodiments of high-speed, high-performance, low-noise optical encoders having various means for preventing undesired stray light from reaching light detectors incorporated therein. Structures employed to block stray light in the optical encoders include light barriers, air gap trenches, and coatings disposed between first and second sides of a substrate of the encoder. Also disclosed are compact single track optical encoders having a single dome lens disposed thereover, and dual track triple dome lens optical encoders. Methods of making such optical encoders are also disclosed. | 12-16-2010 |
20100327152 | Miniaturized Single Track Optical Encoder System with Integrated Index Channel(s) - Disclosed are various embodiments of a reflective optical encoder system having at least three channels—two data channels and at least one index channel. The various configurations of reflective optical encoders disclosed herein permits very high resolution reflective optical encoders in small packages to be provided. In addition, the embodiments of the reflective optical encoder systems disclosed herein reduce problems associated with misalignment between code scales and light detectors, permit relatively simple electronic circuitry to be used to process outputs, and reduce manufacturing, assembly, integrated circuit and encoder costs. Methods of making and using such optical encoders are also disclosed. | 12-30-2010 |
20110114829 | High Resolution Optical Encoder Systems, Devices and Methods - Disclosed are various embodiments of front-end analog circuitry for use in conjunction with optical encoders. Highly accurate analog output signals are provided by front-end analog circuitry in incremental or absolute motion encoders to interpolation circuitry, which is capable of providing high interpolation factor output signals having high timing accuracy. The disclosed interpolation circuits may be implemented using CMOS or BiCMOS processes without undue effort. | 05-19-2011 |
20110139971 | ROTARY POSITION ENCODER - A rotary position encoder for determining a rotary position of a shaft includes a rigid substrate having a planar surface and mounted on the shaft to rotate with the shaft; an optical disk having at least a transparent polycarbonate layer and a reflective layer on the transparent polycarbonate layer, affixed to the planar surface of the substrate, the optical disk having a first circumferential track encoded therein having binary data; an optics assembly for interrogating the optical disk and providing an output signal indicative of data received from the interrogation of the optical disk; and a tracking motor for driving the optics assembly radially with respect to the optical disk. | 06-16-2011 |
20110220780 | OPTICAL ENCODER - An optical encoder | 09-15-2011 |
20110220781 | Optical Encoder - An optical encoder comprising a set of light sources configured to emit light rays in a serial manner, an encoded scale configured to reflect at least a portion of the emitted light rays, and a photodetector, where the photodetector is configured to detect at least a portion of the reflected light rays and to generate signals based on the detected light rays for each of the light sources. | 09-15-2011 |
20110233390 | OPTICAL ENCODER - A miniaturized optical encoder capable of obtaining a sufficient amount of light in the light receiving element is provided. An optical encoder | 09-29-2011 |
20110233391 | OPTICAL ENCODER - A miniaturized optical encoder capable of obtaining a sufficient amount of light in the light receiving element is provided. An optical encoder | 09-29-2011 |
20110233392 | METHOD AND SYSTEM FOR USING LIGHT PULSED SEQUENCES TO CALIBRATE AN ENCODER - An encoder to be mounted to a piston meter and configured to compute a volume of distributed fluid includes a light sensor configured to detect a light sequence and output signals indicative of the light sequence to a processing device, the processing device configured to determine if the light sequence is one of one or more authorized light sequences, wherein the processing device enters a calibration mode if the light sequence is one of the one or more authorized light sequences. | 09-29-2011 |
20110272566 | OPTOELECTRONIC POSITION MEASUREMENT DEVICE AND OPTOELECTRONIC POSITION MEASUREMENT METHOD - An optoelectronic position measurement device having a code carrier that carries at least one optically registered position code and that is illuminated with optical radiation from a radiation source. At least one portion of the optical radiation is registered by at least one registration element, by means of which a signal dependent on the position code can be created and a position of the code carrier relative to the registration element can thus be registered. the code carrier is movable relative to the registration element with a degree of freedom. the optical radiation couples into the code carrier and is guided at least partially in a beam path in the interior of the code carrier lying in the extension level of the code carrier. The decoupling of the optical radiation occurs in a decoupling zone such that the registration element is illuminated by a substantially homogenous intensity distribution. | 11-10-2011 |
20110315864 | OPTOELECTRONIC ANGLE SENSOR - The invention relates to an optoelectronic angle sensor for determining a rotational angle about an axis, comprising a code carrier ( | 12-29-2011 |
20120138781 | Interpolation Circuitry for Optical Encoders - Disclosed are various embodiments of circuitry and methods for generating interpolated signals in an optical encoder. The optical encoder configurations and circuitry disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. Methods of making and using such optical encoders are also disclosed. According to one embodiment, the interpolated signals are generated through the use of signal generation circuitry, peak voltage generation circuitry, reference voltage generation circuitry, slope detection circuitry, and a clocked comparator that is configured to output interpolated output pulses. | 06-07-2012 |
20120168615 | DEVICE AND METHOD FOR OPTICALLY COMPENSATING FOR THE MEASURING TRACK DECENTRALIZATION IN ROTATION ANGLE SENSORS - The invention relates to an improved encoding disk for an optical rotation angle sensor or a rotary encoder, an optical rotation sensor or rotary encoder comprising an improved encoding disk, and a method for optically correcting or compensating for an angle measuring error of a rotary encoder, in particular an angle measuring error which is contingent on a displacement or decentralization of the encoding disk. The encoding disk ( | 07-05-2012 |
20120205528 | THREE-CHANNEL ENCODER USING A SINGLE OPTICAL TRACK - An optical encoder is disclosed. Specifically, a three-channel encoder is disclosed which utilizes a single track for all three channels. An index channel is provided on the same optical track as the first and second channels which are used to determine incremental angular position. Thus, a more compact and simple three-channel encoder is provided. | 08-16-2012 |
20120217384 | OPTICAL ENCODER - An optical encoder includes a light source, a scale which is irradiated by the light source and has a fine pitch pattern and a coarse pitch pattern in a measuring direction in one track, a high resolution detection sensor array which receives light from the scale and detects the fine pitch pattern, and a low resolution detection sensor array which receives light from the scale and detects the coarse pitch pattern. A transmittance distribution or a reflectivity distribution of the scale is a distribution obtained by summing up a modulation component which corresponds to the fine pitch pattern and in which integrated values in a direction perpendicular to the measuring direction form modulation amplitude uniform in the measuring direction and a modulation component which corresponds to the coarse pitch pattern and in which modulation amplitude is uniform in the measuring direction. | 08-30-2012 |
20130015337 | METHOD FOR WORKING OUT THE ECCENTRICITY AND THE ANGULAR POSITION OF A ROTATING ELEMENT AND DEVICE FOR CARRYING OUT SUCH A METHODAANM MASA; PeterAACI OnnensAACO CHAAGP MASA; Peter Onnens CH - A method for working out the angular position of a rotating element, by using at least one fixed light source emitting a light beam in the direction of a fixed sensor, arranging the light source with respect to the rotating element and sensor to induce an interaction between the beam and sensor, and providing a value of the angular position dependent of the sensor's output signal. The method including:
| 01-17-2013 |
20130015338 | METHOD FOR WORKING OUT THE ANGULAR POSITION OF A ROTATING ELEMENT AND DEVICE FOR CARRYING OUT SUCH A METHODAANM MASA; PeterAACI OnnensAACO CHAAGP MASA; Peter Onnens CH - Method for working out the angular position of a rotating element, using at least one light source emitting a light beam in the direction of a fixed sensor and computing elements for processing an output signal of the sensor, includes:
| 01-17-2013 |
20130037705 | ENHANCED OPTICAL REFLECTIVE ENCODER - An optical encoder and optical encoding system are disclosed. Specifically, an encoder having a light detector elevated relative to a light source is described. The relative height difference between the light source and the light detector enables the optical encoder to minimize noise at the light detector without requiring a separate light baffle between the light source and light detector. Methods of manufacturing and operating such an encoder are also described. | 02-14-2013 |
20130099107 | ROTATION SENSOR-EQUIPPED BEARING - A bearing unit is provided in an inner peripheral portion of a sensor housing in which a sensor portion is installed. The sensor portion includes a sensor mounting substrate and a sensor fixed to this sensor mounting substrate. The sensor housing is provided with an axially extending substrate mounting groove formed in a direction of a chord which will define the circular section of the outer peripheral surface of the sensor housing. The sensor mounting substrate is mounted on this substrate mounting groove to install the sensor portion within the sensor housing. | 04-25-2013 |
20130146755 | POSITION MEASURING DEVICE - A position measuring device comprises
| 06-13-2013 |
20130181122 | OPTICAL ENCODER WITH SIGNAL OFFSET CORRECTION SYSTEM - An offset correction system for correcting signal offset of an encoder. The offset correction system may include a light emitter, an encoder disk, a reticle, a light detector; an offset detection circuit and an offset correction circuit. The offset detection circuit may comprise a comparator and an offset detector configured to receive sinusoidal output signals from the light detector and a reference signal to create digital pulses for determining the signal offset. The offset correction circuit may be configured to apply a gain to correct the offset output signal. The offset correction may be implemented in real time mode. | 07-18-2013 |
20130214140 | Rotary Encoder - A rotary encoder includes a housing and a shaft, which has an axis. A graduated disk is fixed in place on the shaft in torsionally fixed manner. The shaft is adapted for the positionally accurate attachment to a first machine part. Furthermore, a scanning device for scanning the graduated disk is fixed in place on the housing, the housing being arranged such that an outer surface forms a positionally accurate rigid stop on a second machine part in the radial direction. The housing includes a housing body and a cover, the housing body and the cover being connected to each other by press-fitting. The housing has a mechanically flexible element which is deformed as a result of the press-fitting. | 08-22-2013 |
20140091213 | ENCODER - The encoder includes a plurality of position-detection-signal generation systems that generates electrical signals as position detection signals having different cycles, respectively; a first computing unit that calculates first position data based on the position detection signals generated by the position-detection-signal generation systems; a second computing unit that calculates second position data based on electrical signals generated by fewer ones of the position-detection-signal generation systems than in the first computing unit; and a failure determination unit that determines whether the encoder is defective based on a comparison between the first position data and the second position data. | 04-03-2014 |
20140151540 | POSITION-MEASURING DEVICE - A position-measuring device includes a cylindrical object rotatable about a longitudinal axis and having a circumferential annular reflection measuring graduation. A stationary scanning unit is disposed opposite the cylindrical object and has a light source, a transmission grating and a detector. The scanning unit is configured to optically scan the reflection measuring graduation by beams of light emitted from the light source passing through the transmission grating and then striking the reflection measuring graduation, from where the beams of light are reflected back toward the detector, which is configured to generate rotation-dependent position signals. An optically effective perpendicular distance between the detector and the reflection measuring graduation is selected to be one of greater or less than an optically effective perpendicular distance between the transmission grating and the reflection measuring graduation depending on a radius of the cylindrical object. | 06-05-2014 |
20140263988 | Rotary Encoder with Free Floating Flexible Sensor Carrier - A rotary encoder with free floating flexible sensor carrier provides a sensor carrier that eliminates the traditional need for bearings and a housing in a rotary encoder, as well as allowing for significant cost savings in material and installation costs, improving acceleration and reducing startup and running torque. A bushing is rotationally fixed to a shaft the rotation of which is desired to be measured. An encoder disc is axially connected to the bushing. A sensor is held in an alignment above the encoder disc by a sensor carrier. The sensor may be connected directly to the sensor carrier or to a circuit board which is connected to the sensor carrier. A shaft alignment portion of the sensor carrier encircles the shaft and a plurality of stabilizing arms hold the sensor carrier in place, thus maintaining the sensor in proper alignment. | 09-18-2014 |
20140326862 | OPTICAL ENCODER - The optical encoder according to the present disclosure includes a light receiving part formed with a plurality of first patterns, and a scale formed with second patterns and moving relative to the light receiving part, where at least one of the first and second patterns is aligned at a same interval to remove harmonic waves. | 11-06-2014 |
20140326863 | OPTICAL ENCODER - The optical encoder according to the present disclosure includes a light receiving part formed with a plurality of first patterns, and a scale formed with second patterns and moving relative to the light receiving part, wherein at least one of the first pattern and the second pattern is formed in a bent band shape to obtain an electric signal of reliable sinusoidal wave shape. | 11-06-2014 |
20140353478 | Angle of Rotation Sensor - An angle of rotation sensor having a rotatable first code disc ( | 12-04-2014 |
20150076332 | ENCODER AND APPARATUS USING ENCODER - The encoder includes a scale provided with first and second periodic patterns, a sensor movable relatively with respect to the scale and including a detection element array to detect the first and second periodic patterns, a periodic signal producer to produce, by using output from the detection element array, a first periodic signal changing corresponding to a first period of the first periodic pattern and a second periodic signal changing corresponding to a second period of the second periodic pattern, and a correction signal producer to produce, by using the second periodic signal, a correction signal for reducing in the first periodic signal a signal component changing corresponding to the second period. A position calculator produces, by using the first periodic signal and the correction signal, information indicating position. | 03-19-2015 |
20150097111 | OPTOELECTRONIC SENSOR AND METHOD FOR THE PRODUCTION OF SUCH - An optoelectronic sensor, in particular used for the detection of an angle of rotation, includes a dimensional scale, a light transmitter, which transmits transmission light in transmission light directions, and a light receiver having a light reception surface, which is arranged in such a way that the light reception surface is substantially located between the dimensional scale and the light receiver. The light receiver receives backwardly reflected transmission light as received light. The light receiver also includes a transmission light directing unit. The light directing unit is configured such that a predefined angle of deflection of the transmission light results with respect to the transmission light directions when the transmission light again exits from the transmission light directing unit. The transmission light directing unit is provided in the light receiver; and the transmission light directing unit is composed of at least one aperture which is incorporated into the light receiver. | 04-09-2015 |
20150108338 | Rotation Angle Detecting Apparatus - A rotation angle detecting apparatus | 04-23-2015 |
20150122981 | SELECTOR LEVER ARRANGEMENT FOR OPERATING A TRANSMISSION IN A MOTOR VEHICLE - A selector lever arrangement for operating a transmission in a motor vehicle with a mounting fixture, a selector lever which is mounted at the fixture in such a way that it can be moved into the designated selector lever positions and an optical detection device for the selector lever position, which includes a carrier, several optical sensors which are arranged on the carrier, an optical deflector, at least one self-luminous light source that is arranged on the carrier, by means of which light can be directed onto the sensors via the deflectors, and a coding element equipped with an optical coding that is arranged within the optical path, which can be shifted into the designated coding positions by means of moving the selector lever, whereby the coding element is intended to be allocated between the sensors and the deflector that is made in form of a light guiding element, which is arranged at the carrier. | 05-07-2015 |
20150122982 | ENCODER, MOTOR WITH ENCODER, AND SERVO SYSTEM - An encoder includes a track having optical effecters arranged to have an absolute pattern in a measurement direction, a light source configured to emit diffusion light to the track, and a light receiving array configured to have light receiving elements arranged in the measurement direction and to receive light reflected or transmitted by the track. The light receiving elements fall within an area which is positioned corresponding to an area between the optical effecters and to which the light reflected by the track dose not reach. | 05-07-2015 |
20150122983 | ENCODER SYSTEM - An encoder system includes a disc coupled to a hub, the disc including a sensible member. The encoder system also includes a sensor operable to cooperate with the sensible member to sense an operating parameter of the disc, and a base assembly movable relative to the hub. A portion of the sensor is coupled for co-movement with the base assembly and movable between a first position in which the portion of the sensor is a first axial distance from the disc and a second position in which the portion of the sensor is a second axial distance from the disc, the second axial distance falling within a desired operating range. | 05-07-2015 |
20150144775 | METHOD FOR DETERMINING ABSOLUTE CODING OF AN OPTICAL CODING TRACK - The invention concerns a method for determining absolute coding represented by code elements of an optical code track, with illumination of the absolute coding with light, modulating of some of the illuminating light on code elements, determining of the absolute coding as modulated light and continuously varying modulation of the light on neighbouring code elements. | 05-28-2015 |
20150323351 | REFLECTIVE OPTICAL ENCODER HAVING RESIN-MADE CODE PLATE - A reflective optical encoder, which is inexpensive and is compact in the axial direction thereof. A first major surface of a code plate has an incidence part having a first transmission portion and a second transmission portion, and an emission part with a concavo-convex shape. A second major surface of the code plate has a flat surface portion. The first transmission portion has a concavo-convex shape configured to guide light after entering the first transmission portion so as to be totally reflected by the flat surface portion. The second transmission portion is a flat surface, for example, configured to guide light after entering the second transmission portion so as not to be totally reflected by the flat surface portion. | 11-12-2015 |
20150345937 | TEST BODY FOR DETERMINING ROTATION ERRORS OF A ROTATING APPARATUS - A test body is provided for determining one or more rotation errors of a rotating apparatus with respect to one or more degrees of freedom of movement, in which a real rotating movement of the rotating apparatus differs from an ideal rotating movement. The test body includes a holder which, together with a part of the rotating apparatus, can be rotated about an axis of rotation. The holder can be configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error(s). One or more test elements are rigidly connected to the holder or are formed on the holder, and each of the test elements is used to determine a rotation error with respect to one or more of the degrees of freedom of movement. | 12-03-2015 |
20150345999 | METHOD FOR DETERMINING A CLOSED TRAJECTORY BY MEANS OF A LASER AND A LASER LIGHT SENSOR AND APPARATUS FOR DETERMINING A CLOSED TRAJECTORY CURVE - The invention relates to a method for determining a closed trajectory curve ( | 12-03-2015 |
20150362348 | METROLOGY DEVICE AND A METHOD FOR COMPENSATING FOR BEARING RUNOUT ERROR - A system and method for determining the angular position of a bearing assembly and compensating measurements for bearing runout error in metrology devices, such as an articulated arm coordinate measurement device and a laser tracker, is provided. The system and method includes measuring the bearing runout error and defining a waveform from encoder readings for a first set of rotations. In one embodiment, a transfer function is created based on an analysis of the bearing runout error, such as with a Fourier analysis for example. In another embodiment the bearing runout error is mapped to an absolute angular position. During operation, the angular position of the bearing assembly is determined by comparing a waveform to the waveform from the first set of rotations. With the angular position determined, the bearing runout error may be used to compensate the measurements of the metrology device. | 12-17-2015 |
20160003645 | ABSOLUTE ENCODER - An absolute encoder includes: a scale on which plural marks are arrayed; plural detecting devices each configured to detect a mark group of the plural marks and output a signal corresponding to the mark group; and a processor configured to obtain a coordinate of the scale based on outputs of the detecting devices. The plural marks are arrayed such that a signal obtained by adding plural signals respectively output from the detecting devices includes a periodic signal corresponding to plural periods. The processor obtains first position data based on a magnitude of at least one signal of the plural signals, obtains second position data having a resolution higher than that of the first position data based on a phase of the periodic signal, and generates data representing the coordinate based on the first and second position data. | 01-07-2016 |
20160007435 | SYSTEMS AND METHODS FOR SYNCHRONOUS OPERATION OF DEBRIS-MITIGATION DEVICES - Systems and methods for synchronous operation of debris-mitigation devices (DMDs) in an EUV radiation source that emits EUV radiation and debris particles are disclosed. The methods include establishing a select relative angular orientation between the first and second DMDs that provides a maximum amount of transmission of EUV radiation between respective first and second rotatable vanes of the first and second DMDs. The methods also include rotating the first and second sets of vanes to capture at least some of the debris particles while substantially maintaining the select relative angular orientation. The systems employ DMD drive units, and an optical-based encoder disc in one of the DMD drive units measures and controls the rotational speed of the rotatable DMD vanes. Systems and methods for optimally aligning the DMDs are also disclosed. | 01-07-2016 |
20160036423 | INTERPOLATION APPARATUS FOR ENCODER, CONTROLLING METHOD OF INTERPOLATION APPARATUS FOR ENCODER, NON-TRANSITORY STORAGE MEDIUM STORING CONTROLLING PROGRAM OF INTERPOLATION APPARATUS FOR ENCODER AND ENCODER - An AD converter acquires first and second input values. A first multiplication unit multiplies a first tangent value, which is based on a first boundary angle based on a phase range of a reference value, by the reference value to calculate a first threshold value. A second multiplication unit multiplies a second tangent value, which is based on a second boundary angle based on the phase range, by the reference value to calculate a second threshold. A comparison unit determines whether the comparison value is within a particular phase range specified by the first and the second thresholds. The comparison unit determines magnitude of the comparison value when the comparison value is not within the particular phase range. A phase estimation unit updates the particular phase range to a phase range adjacent to a direction corresponding to the result of determination. | 02-04-2016 |
20160040988 | ABSOLUTE ENCODER AND SURVEYING DEVICE - An absolute encoder includes a light-emitting mechanism including a light-emitting surface and emitting detection light from the light-emitting surface. A light-receiving mechanism including a scale plate having a scale area and receiving at a light-receiving area the detection light emitted from the light-emitting surface and passing through the scale area of the scale plate. The light-emitting mechanism and the light-receiving mechanism are set to a positional relationship that inclines an irradiation axis extending from the light-emitting surface through the scale area to the light-receiving area relative to a rotation axis direction of the scale plate. | 02-11-2016 |
20160069712 | Magnetically Coupled Optical Encoder - Embodiments of the present disclosure provide an optical encoder that has magnetic elements embedded in a shaft or shaft of the optical encoder. Further, the optical encoder is hermitically sealed and is configured to rotate based on a magnetic field between the optical encoder and an actuation member. | 03-10-2016 |
20160084677 | Optical Angle Detector Having a Beam-Forming Element - A position detector for determining the rotation angle of an element which is rotatable around an axis of rotation (A) comprises a light source ( | 03-24-2016 |
20160138945 | ILLUMINATION PORTION FOR AN OPTICAL ENCODER - An illumination portion for an optical encoder is disclosed. The optical encoder comprises the illumination portion, a scale grating extending along a measuring axis direction and arranged to receive light from the illumination portion, and a detector configuration arranged to receive light from the scale grating. The illumination portion comprises an addressable light source array. The addressable light source array comprises individual sources arranged along the measuring axis direction. The addressable light source array is configured to provide at least a first addressable set and a second addressable set of the individual sources. | 05-19-2016 |
20160146640 | OPTICAL ENCODER - An optical encoder includes a light emitting module, a positioning device and a light separating structure. The light emitting module emits a light beam illuminating an illumination area of the positioning device. The positioning device includes light penetrating areas arranged in a dislocation manner. The light penetrating areas sequentially move into the illumination area. The light separating structure is disposed in the path of the light beam. The positioning device is disposed between the light emitting module and the light separating structure. When part of the light beam penetrates one of these light penetrating areas and is transmitted to the light separating structure, the light separating structure transmits the light to a sensing area and forms at least one first positioning optical pattern. The distance between two first positioning optical patterns formed by two adjacent light penetrating areas is greater than the pitch between the two adjacent light penetrating areas. | 05-26-2016 |
20160153810 | ROTARY ENCODER | 06-02-2016 |
20160161293 | REMOTE OPTICAL POSITION SENSING DEVICE AND METHODS - An optical position sensing system and method for sensing a gimbal position in a gimbal-based optical system. One example of an optical position sensing system includes an off-gimbal light source that generates a position sensing light beam and transmits the position sensing light beam along an optical coude path of the optical system, and an on-gimbal optical element that causes a change in an intensity of the position sensing light beam based on rotation of the gimbal about the axis. The system further includes an off-gimbal detector configured to receive the position sensing light beam returned from the optical element and to detect the change in the intensity of the position sensing light beam, and a controller coupled to the detector and configured to determine the gimbal position based on a correlation between the change in the intensity of the position sensing light beam and the gimbal position. | 06-09-2016 |
20160164383 | ENCODER AND MOTOR WITH ENCODER - An encoder includes an absolute pattern, a light source, and a plurality of light reception elements. The absolute pattern is disposed in a measurement direction. The light source is configured to emit light to the absolute pattern. The plurality of light reception elements are arranged in the measurement direction and configured to receive the light emitted from the light source and transmitted through or reflected by the absolute pattern. The plurality of light reception elements include at least one first light reception element having an edge in the measurement direction. The edge is inclined relative to a width direction perpendicular to the measurement direction. | 06-09-2016 |
20160178404 | Codeur optique robuste | 06-23-2016 |
20160178407 | ENCODER AND MOTOR WITH ENCODER | 06-23-2016 |