公开(公告)号：US20240125629A1

公开(公告)日：2024-04-18

申请号：US18530250

申请日：2023-12-06

申请人： PixArt Imaging Inc.

发明人： Chung-Min Thor ,  Meng-Yee Lim

IPC分类号： G01D5/36 ,  G01D5/245 ,  G01D5/347 ,  G01D18/00

CPC分类号： G01D5/366 ,  G01D5/2457 ,  G01D5/3473 ,  G01D18/00

摘要： There is provided an optical encoder with alignable relative positions between elements including an encoding medium, a sensor package and a memory. The sensor package includes a photodiode array and two alignment photodiodes opposite to the encoding medium. The memory records an alignment pattern associated with output signals of the two alignment photodiodes when the encoding medium and the sensor package are at nominal operating positions. When the encoding medium and the sensor package are not at the nominal operating positions, the relative position alignment is performed by adjusting current relative positions between the encoding medium and the sensor package to cause a current pattern associated with output signals of the two alignment photodiodes to be identical to the alignment pattern.

公开(公告)号：US11874147B2

公开(公告)日：2024-01-16

申请号：US18083621

申请日：2022-12-19

申请人： PIXART IMAGING INC.

发明人： Chung-Min Thor ,  Meng-Yee Lim

IPC分类号： G01D5/36 ,  G01D5/347 ,  G01D5/245 ,  G01D18/00

CPC分类号： G01D5/366 ,  G01D5/2457 ,  G01D5/3473 ,  G01D18/00

摘要： There is provided an optical encoder with alignable relative positions between elements including an encoding medium, a sensor package and a memory. The sensor package includes a photodiode array and two alignment photodiodes opposite to the encoding medium. The memory records an alignment pattern associated with output signals of the two alignment photodiodes when the encoding medium and the sensor package are at nominal operating positions. When the encoding medium and the sensor package are not at the nominal operating positions, the relative position alignment is performed by adjusting current relative positions between the encoding medium and the sensor package to cause a current pattern associated with output signals of the two alignment photodiodes to be identical to the alignment pattern.

公开(公告)号：US20150233737A1

公开(公告)日：2015-08-20

申请号：US14619421

申请日：2015-02-11

申请人： CANON PRECISION INC.

发明人： Ryo SASAKI

IPC分类号： G01D5/347

CPC分类号： G01D5/34707 ,  G01D5/34715 ,  G01D5/366

摘要： An encoder includes a scale including an origin detecting pattern, an origin detector, and a processor. The origin detector includes a plurality of detecting element groups including a first, second, third, and fourth detectors. The first and second detectors and the third and fourth detectors are symmetrically arranged to a center of each detecting element group, respectively. A part of the origin detecting pattern having a physical characteristic different from an origin peripheral part is shorter than each detecting element group. The origin detector outputs a first signal from the first and third detectors, and a second signal from the second and fourth detectors. The processor outputs a fifth signal based on a third signal from the first signal and a first threshold, and a fourth signal from the second signal and a second threshold as an origin signal.

摘要翻译： 编码器包括包括原点检测图案，原点检测器和处理器的标尺。 原点检测器包括多个检测元件组，包括第一，第二，第三和第四检测器。 第一和第二检测器以及第三和第四检测器分别对称地布置在每个检测元件组的中心。 具有与原始周边部分不同的物理特性的原点检测图案的一部分比每个检测元件组短。 原点检测器输出来自第一和第三检测器的第一信号，以及来自第二和第四检测器的第二信号。 处理器基于来自第一信号和第一阈值的第三信号以及来自第二信号的第四信号和作为原始信号的第二阈值输出第五信号。

公开(公告)号：US08666261B2

公开(公告)日：2014-03-04

申请号：US13050438

申请日：2011-03-17

申请人： Tomotaka Takahashi

发明人： Tomotaka Takahashi

IPC分类号： H04B10/04 ,  G01D5/34

CPC分类号： G01D5/38 ,  G01D5/366

摘要： A photoelectric encoder includes a scale; a detector; alight application section; a pair of origin signal reception sections; and a signal processing section adapted to provide the maximum value of the signal level output from the origin signal reception sections by side lobe light occurring as reflected on the origin mark as a stipulated value, provide an effective area of origin detection between the first position at which output of one of the origin signal reception sections for outputting a larger signal level than the stipulated value earlier than the relative displacement becomes a larger signal level than the stipulated value and the first position at which output of the other origin signal reception section exceeds the stipulated value and then becomes a smaller signal level than the stipulated value, and configured to generate the origin detection signal in the effective area.

摘要翻译： 光电编码器包括刻度尺; 检测器 下车应用部分; 一对原点信号接收部分; 以及信号处理部，其适于以原点信号接收部输出的信号电平的最大值作为原始标记反射的旁瓣光作为规定值提供原点检测的有效区域， 用于输出比相对位移更早的规定值以上的信号电平的原点信号接收部中的一个的输出变得比规定值大的信号电平以及另一原点信号接收部的输出超过规定值的第一位置 规定值，然后变得比规定值小的信号电平，并且被配置为在有效区域中生成原点检测信号。

公开(公告)号：US20110272564A1

公开(公告)日：2011-11-10

申请号：US13103161

申请日：2011-05-09

申请人： Hiroaki KAWADA

发明人： Hiroaki KAWADA

IPC分类号： G01D5/347

CPC分类号： G01D5/2457 ,  G01D5/34746 ,  G01D5/366

摘要： A photoelectric encoder has a scale in which a main track for detecting an amount of movement is formed in a measuring direction. The photoelectric encoder includes an origin signal generating portion provided at a part of the main track in a direction orthogonal to the measuring direction. Thereby, change in a light receiving signal due to passage of the origin signal generating portion is detected to generate an origin signal. Thus, the origin signal which is in agreement with a main signal in phase is obtained and improve the reproducibility of an origin position.

摘要翻译： 光电编码器具有在测量方向上形成用于检测移动量的主轨迹的标尺。 光电编码器包括在与测量方向正交的方向上设置在主轨道的一部分处的原点信号生成部。 因此，检测由于原点信号产生部分的通过而导致的光接收信号的变化，以产生原点信号。 因此，获得与主相位相同的原点信号，并提高原点位置的再现性。

公开(公告)号：US07973941B2

公开(公告)日：2011-07-05

申请号：US12646614

申请日：2009-12-23

申请人： Joseph D. Tobiason

发明人： Joseph D. Tobiason

IPC分类号： G01B11/02

CPC分类号： G01D5/34723 ,  G01D5/266 ,  G01D5/268 ,  G01D5/366

摘要： A reference mark configuration for an interferometric miniature grating encoder readhead using fiber optic receiver channels is provided. The readhead may include primary fibers that provide reference mark primary signals processed to generate a reference signal with accuracy of approximately 0.2 microns. In some embodiments, a zone grating type reference mark may be embedded in a periodic scale grating, and configured such that it provides strong reference mark primary signals without disrupting periodic incremental measurement signals associated with the periodic scale grating. In one embodiment, the readhead may include secondary fibers used to generate reference mark secondary signals processed to generate a reference signal with accuracy of approximately 20 nanometers.

摘要翻译： 提供了使用光纤接收器通道的干涉式微型光栅编码器读取头的参考标记配置。 读取头可以包括提供参考标记主要信号的主要光纤，其被处理以产生具有约0.2微米精度的参考信号。 在一些实施例中，区域光栅类型参考标记可以嵌入在周期性尺度光栅中，并且被配置为使得其提供强参考标记主信号而不中断与周期性刻度光栅相关联的周期性增量测量信号。 在一个实施例中，读取头可以包括用于产生被处理以产生具有大约20纳米的精度的参考信号的参考标记辅助信号的次级光纤。

公开(公告)号：US07825369B2

公开(公告)日：2010-11-02

申请号：US11871353

申请日：2007-10-12

申请人： Jun Hane

发明人： Jun Hane

IPC分类号： H01J3/14

CPC分类号： G01D5/34715 ,  G01D5/2457 ,  G01D5/366

摘要： A displacement sensor which detects a positional displacement of a movable member, comprises a position signal generating section configured to generate a periodical signal in accordance with movement of the movable member, a generating section of a signal for detecting a reference position, configured to generate the signal for detecting the reference position, when the movable member is in a predetermined position, a reference position detection circuit configured to detect that the movable member is in a reference position based on the signal for detecting the reference position, generated by the generating section of the signal for detecting the reference position, in synchronization with the periodical signal generated by the position signal generating section, and a selecting section configured to be capable of selecting a phase position to be synchronized from a plurality of phase positions on the periodical signal in the synchronization in the reference position detection circuit.

摘要翻译： 检测可移动部件的位置偏移的位移传感器包括：位置信号生成部，被配置为根据可动部件的移动产生周期信号;检测基准位置的信号生成部，其生成 用于检测参考位置的信号，当可移动部件处于预定位置时，基准位置检测电路被配置为基于用于检测基准位置的信号检测可移动部件处于基准位置，该信号由生成部分 用于与由位置信号生成部生成的周期信号同步地检测基准位置的信号，以及选择部，其被配置为能够选择在周期信号中的多个相位位置进行同步的相位位置 参考位置检测同步 它。

公开(公告)号：US07714273B2

公开(公告)日：2010-05-11

申请号：US11942435

申请日：2007-11-19

申请人： Karsten Saendig

发明人： Karsten Saendig

IPC分类号： G01D5/34

CPC分类号： G01D5/38 ,  G01D5/24438 ,  G01D5/2457 ,  G01D5/366

摘要： A position-measuring device for generating a reference-pulse signal at at least one reference position includes a scanning unit and also a reflection-measuring graduation displaceable relative thereto in at least one measuring direction. The scanning unit for generating the reference-pulse signal includes a plurality of optical elements, including at least one imaging optics as well as at least two diaphragm structures, which are disposed in a diaphragm plane and have a plurality of diaphragm openings in each case. Furthermore, a light source as well as at least two detector elements are assigned to the scanning unit. The reflection-measuring graduation has a reference marking at the at least one reference position. It includes at least one set of first structure elements, which is arranged in the plane of the reflection-measuring graduation, perpendicular to the measuring direction, periodically at a first transversal periodicity. Furthermore, the reference marking has at least one set of second structure elements, which is arranged in the plane of the reflection-measuring graduation, perpendicular to the measuring direction, periodically at a second, different transversal periodicity. The structure elements are arranged as diffractive structure elements, which, in the measuring direction, optically act like a cylinder lens having a specific focal length and, perpendicular to the measuring direction, act like a deflecting grating having the graduation period.

摘要翻译： 用于在至少一个基准位置产生参考脉冲信号的位置测量装置包括扫描单元以及在至少一个测量方向上可相对于其移位的反射测量刻度。 用于产生参考脉冲信号的扫描单元包括多个光学元件，包括至少一个成像光学元件以及至少两个光阑结构，它们设置在光阑平面中并且在每种情况下都具有多个光阑开口。 此外，将光源以及至少两个检测器元件分配给扫描单元。 反射测量刻度在至少一个参考位置具有参考标记。 它包括至少一组第一结构元件，其以与第一横向周期性周期性地垂直于测量方向布置在反射测量刻度的平面中。 此外，参考标记具有至少一组第二结构元件，其被布置在垂直于测量方向的反射测量刻度的平面中，周期性地以不同的横向周期性周期性地布置。 结构元件被布置为衍射结构元件，其在测量方向上具有类似于具有特定焦距并且垂直于测量方向的柱面透镜的光学作用，像具有刻度周期的偏转光栅。

公开(公告)号：US07659992B2

公开(公告)日：2010-02-09

申请号：US11629853

申请日：2005-06-21

申请人： David Roberts McMurtry ,  James Reynolds Henshaw

发明人： David Roberts McMurtry ,  James Reynolds Henshaw

IPC分类号： G01B11/02

CPC分类号： G01D5/366 ,  G01D5/38

摘要： Apparatus for measuring displacement between two members. A scale is provided on one member and has an incremental pattern with at least one reference mark embedded in it. A read head is provided on the other member and comprises a periodic diffraction means for interacting with a light pattern modulated by the incremental pattern on the scale to produce interference fringes having movement relative to said readhead responsive to said displacement, first detecting means for detecting the movement of the interference fringes, imaging means for imaging the reference mark and second detecting means for detecting the image of the reference mark.

摘要翻译： 用于测量两个构件之间的位移的装置。 在一个成员上提供比例，并具有增加的模式，其中嵌入了至少一个参考标记。 读头位于另一个构件上，并且包括周期性衍射装置，用于与由刻度尺上的增量图案调制的光图形相互作用，以产生响应于所述位移相对于所述读取头移动的干涉条纹;第一检测装置， 干涉条纹的移动，用于对参考标记成像的成像装置和用于检测参考标记的图像的第二检测装置。

公开(公告)号：US07639366B2

公开(公告)日：2009-12-29

申请号：US11431182

申请日：2006-05-09

申请人： Erwin Spanner

发明人： Erwin Spanner

IPC分类号： G01B9/02

CPC分类号： G01D5/26 ,  G01B9/02007 ,  G01B9/02012 ,  G01B9/02071 ,  G01B9/0209 ,  G01B2290/15 ,  G01B2290/30 ,  G01B2290/45 ,  G01D5/366

摘要： A position-measuring device for determining the positions of two objects movable with respect to each other along a measuring direction includes a first radiation source for emitting an electromagnetic beam of rays, a beam splitter, which splits each beam of rays emitted by the radiation source into at least one first and one second partial beam of rays, a reference reflector arranged in the beam path of the first partial beam of rays, a measuring reflector, movable with respect to the reference reflector along the measuring direction, which is arranged in the beam path of the second partial beam of rays, a device for superposing the two partial rays of beams after their reflecting at the respective reflector, for generating a measuring signal, a second radiation source for emitting additional electromagnetic beams of rays and a combining device for combining the additional electromagnetic beams of rays into the beam path of the electromagnetic beam of rays generated by the first radiation source. In the position-measuring device, a detection device is arranged such that it receives a reference signal formed by superposition of the beams of rays emitted by the first radiation source and the additional beams of rays, and an evaluation device is assigned to the detection device, which is equipped and provided for evaluating the reference signal formed by the superposition of the beams of rays of the two radiation sources for generating a reference pulse.

摘要翻译： 用于确定沿着测量方向可相对于彼此移动的两个物体的位置的位置测量装置包括用于发射电磁射线束的第一辐射源，分束器，其将辐射源发射的每束光线分开 至少一个第一和第二部分射线束，布置在第一部分射线束的光束路径中的参考反射器，测量反射器，其沿着测量方向相对于参考反射器移动，该测量反射器布置在 第二部分光束的光束路径，用于在其反射后在相应反射器处叠加两束部分光束的装置，用于产生测量信号，用于发射附加电磁射线束的第二辐射源和用于 将附加的电磁射线束组合成由第一雷达产生的电磁射线束的光束路径 来源。 在位置测量装置中，检测装置被布置成使得它接收由第一辐射源发射的射线和附加射束束叠加而形成的参考信号，并且将评估装置分配给检测装置 其被配备并用于评估由两个辐射源的光束的叠加形成的参考信号，用于产生参考脉冲。