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9040900 Two-dimensional absolute encoder and scale therefor  
A two-dimensional absolute encoder includes; a scale on which marks are arranged at predetermined pitches along first and second directions; a detector configured to detect a number of marks...
8941052 Illumination portion for an adaptable resolution optical encoder  
An illumination portion is used in an optical encoder which comprises a scale grating, an imaging portion, and a detector portion. A light source outputs light having a wavelength λ. A structured...
8921761 Optical decoder and multi-functional printer using the same  
An optical decoder and a multi-functional printer using the same are provided. The optical decoder includes a directional light source, a light guide bar and a light receiving unit. The light...
8890057 Optical position-measuring device  
An optical position-measuring device includes a measuring standard and a scanning unit. The measuring standard includes an incremental graduation and at least one reference marking at a reference...
8847145 Method for working out the angular position of a rotating element and device for carrying out such a method  
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...
8835832 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...
8829420 Two dimensional encoder system and method  
An encoder system and method are provided, that is designed to improve 2D encoder systems and methods in areas such as accuracy, compactness, stability, resolution, and/or light efficiency....
8816269 Reflective optical scale for encoder and reflective optical encoder  
A reflective optical scale for an encoder, in which a first region and a second region are alternately arranged on an underlying member, wherein the first region has a reflecting member on the...
8809758 Light field image sensor with an angle-sensitive pixel (ASP) device  
An angle-sensitive pixel (ASP) device that uses the Talbot effect to detect the local intensity and incident angle of light includes a phase grating disposed above a photodiode assembly or a phase...
8810801 Three-dimensional measurement apparatus, method for controlling a three-dimensional measurement apparatus, and storage medium  
A three-dimensional measurement apparatus comprises a detection unit configured to detect a plurality of intersection positions between first pattern light in which a bright part and a dark part...
8772706 Multiple wavelength configuration for an optical encoder readhead including dual optical path region with an optical path length difference  
A readhead and scale arrangement comprises: a readhead comprising a light source configured to output diverging source light comprising a plurality of individually detected wavelengths and at...
8755094 Method of measuring irradiation position shift and focus shift in optical scanning apparatus  
A pupil splitting lens that splits a pupil of a light beam from a deflector into a plurality of light beams in a main scanning direction of the deflector and a pupil splitting lens that splits the...
8742322 Encoder and interferometer that generate M-phase signals by multiplying N-phase signals by M coefficient sets, where N is not less than 6 and M is not smaller than 2  
The laminated diffractive optical element includes plural diffraction gratings (21, 22 and 23) laminated with each other, the respective diffraction gratings being formed of a same...
8710427 Sensor chip, sensor cartridge, and analysis apparatus  
A sensor chip includes: a substrate that has a planar portion; and a diffraction grating, on which a target substance is placed, that includes a plurality of first protrusions periodically...
8687200 Method and device for measuring motion error of linear stage  
Measurement of motion errors of a linear stage is performed to enable accurate measurement of motion errors in linear directions and a rotational direction in the linear stage using a diffraction...
8658964 Photoelectric encoder with optical grating  
A photoelectric encoder in which light emitted from a light source is modulated by an optical grating and the modulated light is detected by a light receiving element, includes a one-side...
8637805 Optical encoder using off-axis imaging through a lens  
A miniaturized optical encoder capable of obtaining a sufficient amount of light in the light receiving element is provided. An optical encoder 1 includes a scale 2 having a scale track 2′ and a...
8604413 Optical encoder including displacement sensing normal to the encoder scale grating surface  
Disclosed is a displacement sensor configuration, comprising a scale grating disposed in a first direction; and a scale light imaging configuration which includes first and second optical paths...
8582115 Tunable and switchable multilayer optical devices  
A multilayer optical device includes an arrangement, on a substrate, of a first layer, a second layer, and a space therebetween. The second layer is a thin-film. The arrangement of the first and...
8546746 Photoelectric encoder and photoelectric encoder system  
A photoelectric encoder includes a scale in which diffraction gratings are formed at predetermined pitches in a measurement axis direction, a detection head which is relatively movable with...
8530811 Light field image sensor, method and applications  
An angle-sensitive pixel (ASP) device that uses the Talbot effect to detect the local intensity and incident angle of light includes two local diffraction gratings stacked above a photodiode. When...
8525459 Code disk, optical encoder, and motor system  
An optical encoder includes a light source, a light sensor array, and a code disk having a data track and a commutation pattern. The commutation pattern includes first, second, and third...
8513589 Indexed optical encoder, method for indexing an optical encoder, and method for dynamically adjusting gain and offset in an optical encoder  
An optical encoder may include an encoder disk, an illumination system, and a detector to detect light diffracted from the encoder disk. The encoder disk may include a signal track comprising a...
8476577 Optical encoder  
A miniaturized optical encoder capable of obtaining a sufficient amount of light in the light receiving element is provided. An optical encoder 1 includes a scale 2 having scale markings 21 and a...
8476579 Indexed optical encoder, method for indexing an optical encoder, and method for dynamically adjusting gain and offset in an optical encoder  
An optical encoder may include an encoder disk, an illumination system, and a detector to detect light diffracted from the encoder disk. The encoder disk may include a signal track comprising a...
8476578 Rotary encoder and rotation mechanism including the same  
A rotary encoder includes two first detection units disposed at positions that are symmetrical about a rotation axis, each of the first detection units outputting an incremental signal, and second...
8436293 Optical encoder and method for measuring displacement information using multiple optical tracks of diffractive optical regions having different periodicities  
An optical encoder and method for measuring displacement information uses an encoder member that includes multiple optical tracks of diffractive optical regions having different periodicities with...
8415611 Sensor chip, sensor cartridge, and analysis apparatus  
A sensor chip includes: a substrate that has a planar portion; and a diffraction grating on the planar portion and having a metal surface, the diffraction grating having a target substance thereon...
8344310 Optical member with high and low refractive index layers  
An optical member including high refractive index layers having a great refractive index and low refractive index layers having a small refractive index, which are each relatively thin as compared...
8330096 Interrogator for a plurality of sensor fiber optic gratings including a driver/modulator  
An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the...
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...
8173951 Optical encoder comprising a main and reference light receiving portions with a three-phase signal generation for detecting displacement and direction of displacement of an incremental grating track  
In an optical encoder for measuring relative displacement, a scale 10 has a reference mark 14 composed of a reflection slit formed on at least one point of an incremental track 12, a detection...
8158398 Microelectronic sensor device  
An optical device provides evanescent radiation, in response to incident radiation, in a detection volume for containing a target component in a medium. The detection volume has at least one...
8153956 Interrogator for a plurality of sensor fiber optic gratings including a masking compensation operation  
An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the...
8153957 Integrated optical imaging systems including an interior space between opposing substrates and associated methods  
An integrated optical imaging system includes a first substrate having first and second opposing surfaces, a second substrate having third and fourth opposing surfaces, a spacer between a...
8148672 Optical member with high and low refractive index layers  
An optical member includes high refractive index layers having a great refractive index and low refractive index layers having a small refractive index, which are each relatively thin as compared...
8093546 Out-of-round coder  
An angle sensor for detecting an out-of-round condition includes a disc supporting angle coder rigidly attached to a rotating shaft and at least one fixed optical system including a coherent light...
8089041 Illumination device, image display device, and projector  
An illumination device includes: a light source unit that emits coherent light; and a diffractive optical element that diffracts the coherent light emitted from the light source unit and makes the...
8081321 Scanning unit of an optical position measuring arrangement and position measuring arrangement having this scanning unit  
A scanning unit, by which a scale, which is movable in relation to the scanning unit in a measuring direction, can be optically scanned. The scanning unit including a detector arrangement and a...
7994469 Interrogator for a plurality of sensor fiber optic gratings having at least one filter for converting changes in peak reflection wavelength to changes in intensity  
An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the...
7978320 Light angle detection device, method for fabrication thereof and electronic device employing same  
A light angle detection device according to an embodiment of the present invention includes a first light receiving lens, a first light sensing element, a second light receiving lens, and a second...
7947946 Optical system for mapping signal light onto a detector  
The invention relates to an optical system that particularly allows an improved detection of signal light propagating from a light source (1) through a flat glass substrate (11). SC-modes of this...
7936512 Optical gating system using moiré effect  
To provide an optical gating system capable of performing single-shot, parallel, and ultrafast gating equal to or less than a subpicosecond, without depending on coherence. The optical gating...
7923672 Process and devices for optically sensing a specimen with a large depth of field  
A device for optically sensing a specimen with a large depth of field has a lighting module which illuminates a zone of the specimen during a predetermined measurement period with a pattern whose...
7924433 Displacement measurement system and method of use  
A measurement displacement system and method are described. The measurement displacement system comprises a sensor head configured to transmit input optical beams and to receive measurement beams....
7902494 System for detecting motion of a body  
The invention relates to a system (1) for detecting motion of a body (2) comprising a first elongated grating strip (4) coupled to said body and a separate and substantially stationary second...
7903336 Optical metrological scale and laser-based manufacturing method therefor  
A reflective metrological scale has a metal tape substrate and a scale pattern of elongated side-by-side marks surrounded by reflective surface areas of the substrate. Each mark has a furrowed...
7889356 Two grating lateral shearing wavefront sensor  
Methods include simultaneously diffracting a beam in a first direction and a second direction orthogonal to the first direction to form a once-diffracted beam, where the beam comprises a wavefront...
7880880 Alignment systems and methods for lithographic systems  
An alignment system for a lithographic apparatus has a source of alignment radiation; a detection system that has a first detector channel and a second detector channel; and a position determining...
7875844 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...