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| Number | Title | Issue Date |
| 8188421 | Optical encoder for detecting the relative displacement between an encoder scale and an encoder head An optical encoder comprises an encoder head and a scale having a second grating that has an optical pattern. The encoder head has a light emission unit to emit specific light to the scale, a light transmission member to transmit the light emitted from the light emi... | 05/29/2012 |
| 8110792 | 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 process... | 02/07/2012 |
| 8063355 | Reflective multi-turn encoders with different light sensing systems Disclosed herein are a number of different embodiments of reflective multi-turn optical encoders with different light sensing systems. Three different basic configurations of reflective multi-turn optical encoder light sensing systems are disclosed herein: (a) optic... | 11/22/2011 |
| 8044339 | Intensity-based optical encoder using digital diffractive optic regions An optical encoder and method for measuring displacement information using an optical encoder uses an encoder member with multiple digital diffractive optic regions to optically diffract an incident beam of light to produce output beams of light having intensity dis... | 10/25/2011 |
| 7982176 | 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 process... | 07/19/2011 |
| 7569808 | Rotary encoder, belt conveyance apparatus, and image forming apparatus A rotary encoder includes a shaft which serves as a rotation axis, a disc supporting plate fixed to the shaft, an encoder disc having a center hole, a first side face, and a second side face opposing the first side face, an elastic member contacting and pressing the... | 08/04/2009 |
| 7547875 | Absolute type encoder apparatus and method for operating the same A high-precision absolute type encoder apparatus includes a controller electrically connected to an incremental type encoder and generating a control signal to the incremental type encoder, a comparator electrically connected to outputs of the incremental type encod... | 06/16/2009 |
| 7521669 | Multi-bit absolute position optical encoder with reduced number of tracks An optical encoder includes a coding element having a track with a track pattern that comprises multiple optically distinguishable sections. The optical encoder compares photodetector outputs with transition-specific thresholds that correspond to transitions between... | 04/21/2009 |
| 7449677 | Optical encoder An optical encoder includes a code strip having a first side, a second side, a first track comprising indicia thereon, and a second track comprising indicia thereon. The code strip is moveable along a displacement path with respect to the optical encoder. A light so... | 11/11/2008 |
| 7443518 | Measuring instrument, in particular for transmission measurement in vacuum system A measuring instrument, in particular for transmission measurement with transparent substrates, comprises a measuring head with a light emitting element for emitting a light beam and a light receiver element for recording an incident light beam, and a retro-reflecto... | 10/28/2008 |
| 7435946 | Mark detector using multiple light beams for use in a displacement detector and an image forming apparatus A mark detector to detect a plurality of marks which are arranged in a predetermined cycle on a moving member, such as a photo conductor belt, a transfer belt, a paper conveyance belt, a photo conductor drum, a transfer drum, etc. especially in an image forming appa... | 10/14/2008 |
| 7423257 | Signal transmission device and method for transfer of signals between two elements moving relative to one another using an optically-readable strip conductor In a signal transmission device as well as a method for transmission of signals between two elements moving relative to one another, in particular for transfer of measurement and/or control data between a rotating part and a stationary part of a computed tomography ... | 09/09/2008 |
| 7405393 | Position encoder An optical encoder that includes an optical grating and a quadrature optical encoder sensor that move relative to each other. The optical grating includes a first encoder bar and a plurality of second encoder bars, wherein the first encoder bar is optically configur... | 07/29/2008 |
| 7402793 | System and method for controlling and energizing a rotating object A system for transferring power between components includes a first object having a light emitter operatively connected to a power source, and a second object having a light receiver operatively connected to a power storage unit. The light receiver receives light em... | 07/22/2008 |
| 7399956 | Optical encoder with sinusoidal photodetector output signal An optical encoder includes an optical encoder pattern of alternating light elements and dark elements, and an optical unit, including an optical emitter providing light to the encoder pattern, and an optical sensor including a photo-detector receiving the light fro... | 07/15/2008 |
| 7400269 | Coding element with integrated limit switch An optical encoder. The optical encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of optically distinguishable sections. The plurality of optically distinguishab... | 07/15/2008 |
| 7394062 | Displacement-measuring optical scale and optical encoder using same When a convex lens 13 comes close to 0-th order transmitted light T0 with rotation of an optical scale 11, the 0-th order transmitted light T0 derived from a light beam L emitted from a light source 15 and transmitted through a dif... | 07/01/2008 |
| 7391011 | Optical encoder capable of detecting absolute position In two phases signals (A, B) outputted from a scale or a scale having a discontinuous portion provided in its incidental member to a light receiving portion, a region in which amplitudes of the two phases signals (A, B) are small corresponds to outputs when a reflec... | 06/24/2008 |
| 7391009 | Angle-measuring system having irregular reference mark that is dedicated without time delay An angle-measuring system comprising at least one transmitter provided with a number of complementary signal-generating elements disposed in pairs and creating a pattern of signals. The elements create a reference mark irregularly configured at least at one spot. A ... | 06/24/2008 |
| 7385178 | Reflective encoders with various emitter-detector configurations Optical encoders having one or more of a number of disclosed features are disclosed. The features of the optical encoder in accordance with the present invention include a symmetrical (for example, circular) emitter; baffle between the emitter and a detector; double... | 06/10/2008 |
| 7385179 | Optical encoder for measuring displacement At least one exemplary embodiment is directed to an optical encoder which includes a first diffraction grating having a desired optical effective aperture ratio at an appropriate gap position so as to eliminate and/or reduce high-harmonic components from the light i... | 06/10/2008 |
| 7378643 | Optical projection encoder with patterned mask An Optical Projecting Encoder (“OPE”) having an emitter module for transmitting emitted optical radiation through a mask to a moving object, and a detector module for receiving reflected optical radiation from the moving object. The reflected optical radiation f... | 05/27/2008 |
| 7377435 | Optical encoder An optical encoder is disclosed, in particular, which has a light sensing element with light-sensing cells arranged in a matrix. The light sensing element repeatedly detects the same reflective light beam by different rows of light-sensing cells to increase the prec... | 05/27/2008 |
| 7372625 | Device for retaining optical components A device for retaining optical components includes a number of open orifices disposed next to one another in an arrangement. A raceway corresponding to the arrangement is provided, the raceway including a number of detents. A ball bearing follows the raceway and coo... | 05/13/2008 |
| 7368705 | Absolute encoder employing linked sub-encoders and beat track An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The sub-encoders can utilize edge modulation of a main grating track, slo... | 05/06/2008 |
| 7370016 | Music distribution systems Music is blanket transmitted (for example, via satellite downlink transmission) to each customer's user station where selected music files are recorded. Customers preselect from a list of available music in advance using an interactive screen selector, and pay only ... | 05/06/2008 |
| 7358865 | Optical encoder and apparatus using optical encoder An optical encoder includes a cylindrical reflective scale, a point light source for irradiating the reflective scale, and light-receiving elements for receiving the light beams reflected by the reflective scale. The pitch of the reflective scale is set to an approp... | 04/15/2008 |
| 7358480 | System and method for re-synchronizing an access barrier with a barrier operator A system for re-synchronizing an access barrier with a barrier operator comprises an access barrier, and a barrier operator to profile and monitor the manual and automatic movements of the access barrier. The barrier operator comprises a controller, a memory, a moto... | 04/15/2008 |
| 7358479 | Method and computed tomography gantry for measurement of rotation angle of rotor In a gantry for an x-ray computed tomography apparatus with a rotor and a stator and a device for measurement of the rotation angle as well as a method for measurement of the rotation angle, a disc is provided with markings that rotate relative to a detection device... | 04/15/2008 |
| 7359826 | Method and device for detection of oscillations by a position measuring system A method for detecting the angular change of a scanning device with respect to at least one scale of a position measuring system by detecting several angular positions of the scanning device in relation to the at least one scale by detecting position measurements of... | 04/15/2008 |
| 7355165 | Optical encoder and method for using same An optical encoder, a system and a method for outputting a signal are provided. The optical encoder and the system have a shaft extending from an interior of a housing. A circuit board having a light emitting element and a light detector is connected to the housing.... | 04/08/2008 |
| 7349102 | Methods and apparatus for reducing error in interferometric imaging measurements Described is a fringe generator for an interferometric measurement system having improved fringe stability and reproducibility. The fringe generator includes a light source at a characteristic wavelength and a diffractive element to generate a pair of diffracted bea... | 03/25/2008 |
| 7348770 | Electronic device for interrupt signal control to acquire encoder speed information and a method thereof An electronic device for acquiring encoder speed information and a method for implementing the same are provided, wherein the electronic device includes an encoder for electrically outputting an encoder signal corresponding to a driving speed, a processor unit for o... | 03/25/2008 |
| 7348543 | Optical encoder with hollow light guide for indicating the angular position of a rotary shaft An optical encoder assembly and a method for measuring a rotation angle in which optical beams are spread over the circumference of a rotating optical disk by means of optical guides (OG). In the preferred embodiment the rotating optical disk has a pair of concentri... | 03/25/2008 |
| 7348544 | Optical encoder with discontinuous optical grating An optical encoder includes a light-emitting unit, a scale with a discontinuous part, and a plurality of light-receiving elements arranged in relationship to a pitch of the scale. In the optical encoder, a light beam from the light-emitting unit reflects off the sca... | 03/25/2008 |
| 7348546 | Position measuring system with a scanning unit having a reference pulse signal detection unit A position measuring system having a scale that includes an incremental graduation track, which extends in a measuring direction, the incremental graduation track having a periodic arrangement of graduation areas with different optical properties and a reference mar... | 03/25/2008 |
| 7342671 | Sensor head of reflective optical encoder A sensor head is used with a scale having a periodic optical pattern to constitute a reflective optical encoder. The sensor head includes a light source which emits a light beam applied to the scale, a photodetector which detects a light beam reflected and modulated... | 03/11/2008 |
| 7339540 | Sparse and virtual array processing for rolling axle array system A radar signal processing system comprises a processor that determines a respective position of each of a plurality of radiating elements included in a radar array. Each radiating element has a respectively different motion vector from every other one of the plurali... | 03/04/2008 |
| 7339297 | Drive for an elevator installation with integrated sensor A drive for an elevator installation which drives a car and a counterweight with supporting and driving belts includes a drive shaft and a drive pulley. A motor is arranged at either side of the drive pulley and is equipped with a signal transmitter. An inner ring o... | 03/04/2008 |
| 7336367 | Light-receiving/emitting composite unit, method for manufacturing the same, and displacement detection device A displacement detection device having excellent stability with the lapse of time and suitable for reduction in size and weight includes: a light source for emitting light; polarizing light splitting unit for splitting the light emitted from the light source into tw... | 02/26/2008 |
