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| Number | Title | Issue Date |
| 7432497 | Absolute linear encoder An absolute linear encoder includes a plurality of absolute scales aligned in the detection direction with absolute calibrations, a plurality of detectors for detecting the calibrations on the absolute scales, absolute position data generating portions of each scale... | 10/07/2008 |
| 7432496 | Encoder scale writing or calibration at an end-use installation based on correlation sensing A method for writing or calibrating the scale of a scale-based position encoder. The scale is installed where it will be used to provide ongoing position measurements for a host system. The image correlation sensor is temporarily mounted proximate to the mounting po... | 10/07/2008 |
| 7414238 | Optical encoder device for small-sized motor and method of producing the same An optical encoder device for a small-sized motor has a code wheel attached to a motor shaft which extends to the exterior of the motor through a bearing accommodated in a bearing-retaining section provided on an end bell of the motor, and a board on which a photose... | 08/19/2008 |
| 7408654 | Method for measuring position, linear velocity and velocity change of an object in two-dimensional motion A system for reproducibly measuring motion along surfaces of arbitrary or indeterminate length and of arbitrary curvature, using an opto-electronic sensor mounted to an object in motion along the surfaces. The system involves the detection of alternating reflective ... | 08/05/2008 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7348547 | Position detecting apparatus and image processing apparatus provided with the same There is provided a position detecting apparatus that has a high ability of detecting a correct position even if there is mechanical play in a moving mechanical member, a position of which is detected, and an image processing apparatus provided with the position det... | 03/25/2008 |
| 7332709 | Photoelectric encoder A photoelectric encoder includes a light source of an illumination light beam. The encoder also includes a movable grating which has grating lines and which is displaceable in a direction intersecting the grating lines. An index grating serves as a reference for dis... | 02/19/2008 |
| 7329859 | Photoelectric encoder A photoelectric encoder that has a lens optical system including a lens inserted between a main scale and a light receiving element. In the photoelectric encoder, three planes extended from a surface of the main scale, a principal plane of the lens, and an image pla... | 02/12/2008 |
| 7312870 | Optical alignment detection system An optical alignment detection system for detecting the alignment of a first object relative to a second object is provided. One or more light sources and one or more light detectors, either or both of which are secured relative to the second object, are used to det... | 12/25/2007 |
| 7309855 | Reflective encoder with light shield and electronic device using such reflective encoder A reflection encoder is disclosed having a light emitting element in a light receiving element that are separated by a light shielding body that prevents unwanted light from entering the light receiving element. In variations of the invention, the light shielding bo... | 12/18/2007 |
| 7304295 | Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set A system and method of measuring a rotational motion of a code wheel measures a rotational movement of the code wheel including an error component due to a non-rotational movement of the code wheel; measures the non-rotational movement of the code wheel; and produce... | 12/04/2007 |
| 7301142 | Optical encoder photodetector array with multiple resolutions A photodetector for an optical encoder has plural sets of segmented photodiodes, each set of which is made by two adjoining segmented photodiodes capable of coping with a scale slit having a reference resolution. Output lines of the two adjoining segmented photodiod... | 11/27/2007 |
| 7289229 | Optical displacement-measuring instrument An optical displacement-measuring instrument of a reflection type includes a sensor head movable above a scale in a direction of measurement. This instrument is of a three-grating type that comprises a first optical grating arranged close to a light source, a second... | 10/30/2007 |
| 7276686 | Method and device for detecting the opening angle of the shutter of an adjustable rotating shutter in a film camera The invention relates to a method and a device for detecting the opening angle of the shutter (light or dark sector) of an adjustable rotating shutter (1) arranged in a film camera. Said shutter comprises a circular-segment-shaped or circular-sector shaped sh... | 10/02/2007 |
| 7263172 | X-ray apparatus having means for determining movable component positions The invention relates to an apparatus, notably an X-ray apparatus, which comprises two components which are displaceable relative to one another. A position visualization unit is arranged on one component of the apparatus and the other component of the apparatus is ... | 08/28/2007 |
| 7230230 | Apparatus for adjusting a signal and prohibiting adjustment of the signal based on a position of a movable member A signal adjusting apparatus includes a movable member, a setting device, and a prohibiting device. The movable member is movable in a movable range to have the electrical signal adjusted in accordance with a position of the movable member. The setting device sets a... | 06/12/2007 |
| 7199354 | Detector array for optical encoders A photodiode detector array for optical encoders includes a plurality of photodiodes, each of the photodiodes providing a scanning signal with a defined phase relationship to a scale when the detector array moves relative to the scale. A plurality of switching eleme... | 04/03/2007 |
| 7199356 | Absolute angle detecting device First and second signal detecting element groups are respectively arranged to face first and second signal detecting tracks that are provided on a first code wheel. In addition, third and fourth signal detecting element groups are respectively arranged to face third... | 04/03/2007 |
| 7196320 | Fiber optic encoder for position sensing A passive all fiber optic encoder that will be able to determine speed, position, and direction of movement of a movable object. The all passive encoder utilizes no electronics within the sensing part and therefore is deployable in harsh environments, electrical, el... | 03/27/2007 |
| 7183538 | Apparatus for adjusting a signal based on a position of a movable member A signal adjusting apparatus comprises a movable member, a first detecting device, a second detecting device, and a correction device. The member is movable in a movable range composed of a plurality of intervals. The first detecting device detects one of the interv... | 02/27/2007 |
| 7176449 | Power transfer device with contactless optical encoder and pitched reflective surface An angular offset sensing device includes an optical encoder having a light generating element and a light sensor. An armature includes a reflective surface having a generally semicircular shape and a surface height continuously increasing from a first end of the su... | 02/13/2007 |
| 7164120 | Position measuring instrument A method for position measurement that includes scanning a plurality of graduation periods of one incremental graduation by a detector arrangement extending over a length of one measurement range, a reference marking being integrated with one of the graduation perio... | 01/16/2007 |
| 7158690 | Enhancing the resolution of measurement systems employing image capturing systems to measure lengths Two scales having unequal pitches are used to measure lengths with a greater resolution than that offered by an image capturing system operating alone. In an embodiment, the different pitches are attained by having bands of unequal width in the two scales. Images re... | 01/02/2007 |
| 7135673 | Imaging rotation angle absolute encoder An angle absolute encoder comprises an encoded code rod that has code marks, such as pairs of fine code lines and coarse code lines. Light is reflected from or transmitted through the code marks and detected by a light detector to determine absolute angle position. | 11/14/2006 |
| 7132647 | Optical encoder A main scale of an optical displacement measuring apparatus has slits arranged on it at regular intervals, a part of which is a missing slit that does not allow light to pass through used for detecting the original point. An index scale has four sets of windows form... | 11/07/2006 |
| 7112782 | Optical position measuring system An optical position measuring system including a scale and a scanning unit. The scanning unit includes a light source that emits light beams and a periodic scanning graduation having scanning graduation marks arranged periodically at a scanning graduation period alo... | 09/26/2006 |
| 7102123 | Reflective imaging encoder Reflective image encoder. A reflective image encoder has an emitter such as one or more light emitting diodes, a diffuse reflective coder such as a code wheel or code strip reflecting a portion of the light from the emitter, an imaging lens forming an inverted image... | 09/05/2006 |
| 7098446 | Photoelectric encoder A photoelectric encoder includes an optical receipt chip on which a plurality of photodiodes (PDs) are laid out along a measurement axis “X” so that these are organized into an array. The layout pitch of PDs disposed at end portions of the array is made less tha... | 08/29/2006 |
| 7085673 | Displacement estimation system and method A displacement estimation system including a data acquisition system and a processing system is provided. The data acquisition system is configured to capture a first frame from a first substrate including a first pattern and a second substrate including a second pa... | 08/01/2006 |
| 7071480 | Sensor with alignment self compensation A material web attribute detection system with the material web having a first side and a second side. The system includes a radiation source located proximate to the first side of the material web and emitting radiation toward the material web, and a radiation dete... | 07/04/2006 |
| 7069120 | Position sensing system A passive sensing system for determining a physical position of a mechanical device includes an encoding system configured to convert a position signal representative of the physical position of the mechanical device into an encoded signal in a binary format. The se... | 06/27/2006 |
| 7062960 | Blow out preventer testing apparatus The consequences of any failure of a blow out preventer assembly to operate correctly in an emergency can be far reaching. Thus, there is provided an apparatus for registering parameters in the bore of a member which is, in use, connected to a pressurised housing, t... | 06/20/2006 |
| 7057162 | Apparatus and method for positioning an optical component An apparatus and a method of the present invention positions an optical component among several optical components, which are arranged in a receiving device. The receiving device is rotatable about an axis or movable along a direction in such a way that an optical c... | 06/06/2006 |
| 7057161 | Position measuring device A position measuring device having a scanning device and a scale, wherein the scanning device is movable in relation to the scale in a measuring direction. The scale including a measuring graduation, wherein periodic measuring signals are generated when the scanning... | 06/06/2006 |
| 7034283 | Absolute incremental position encoder and method A position encoder uses a track encoded with a pattern of bit-widths in accordance with a sequence. The sequence may be any sequence having unique subsequences, and may be a pseudo-random noise (PRN) sequence such that each N-bit subsequence occurs only once on the ... | 04/25/2006 |
| 7034282 | Optical rotary encoder An optical rotary encoder for acquiring rotation information regarding a shaft includes a light source located on or in the vicinity of the axis of rotation of the shaft for emitting light rays and a code wheel mounted on the shaft for rotation about the axis of rot... | 04/25/2006 |
| 7012704 | Position detecting device A position detecting device in which a count value is incremented or decremented on the basis of a pulse output from an encoder every predetermined shift amount of a control target to thereby detect a current value representing a current position of the control targ... | 03/14/2006 |
