公开(公告)号：US20110233391A1

公开(公告)日：2011-09-29

申请号：US12956992

申请日：2010-11-30

申请人： Eric Herbert Altendorf ,  Tatsuya Nagahama ,  Miyako Mizutani ,  Toru Yaku

发明人： Eric Herbert Altendorf ,  Tatsuya Nagahama ,  Miyako Mizutani ,  Toru Yaku

IPC分类号： G01D5/34

CPC分类号： G01D5/34

摘要： 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 readhead 3 having a light source 31 that emits light to the scale track 2′, a scale-side lens 32 that transmits the light emitted from the light source 31 to the scale track 2′, and a light receiving element 33 that receives the light reflected by the scale track 2′ through the scale-side lens 32. The light source 31 is arranged between the scale-side lens 32 and the light receiving element 33. An optical axis Lsrc of the light source 31 is matched with an optical axis Ls of the scale-side lens 32 in a reading direction of the scale 2 and is separated from an optical axis Ls of the scale-side lens 32 by a predetermined distance D in a direction perpendicular to the reading direction of the scale 2.

摘要翻译： 提供能够在光接收元件中获得足够量的光的小型化光学编码器。 光学编码器1包括具有刻度轨道2'的标尺2和具有向标尺轨道2'发射光的光源31的读取头3，将从光源31发射的光透射到比例侧透镜32 刻度轨道2'，以及光接收元件33，其接收由刻度轨道2'反射的光通过刻度侧透镜32.光源31配置在刻度侧透镜32与受光元件33之间 光标31的光轴Lsrc在刻度尺2的读取方向上与刻度侧透镜32的光轴Ls匹配，并且与标尺侧透镜32的光轴Ls分离预定的 距离D与标尺2的读取方向垂直的方向。

公开(公告)号：US20110031383A1

公开(公告)日：2011-02-10

申请号：US12535561

申请日：2009-08-04

申请人： Joseph D. Tobiason ,  Toru Yaku ,  Emi Kaneko ,  Eric H. Altendorf

发明人： Joseph D. Tobiason ,  Toru Yaku ,  Emi Kaneko ,  Eric H. Altendorf

IPC分类号： G01D5/34

CPC分类号： G01D5/34

摘要： A method and apparatus for suppressing loss of scale image contrast due to interference effects from optical path length differences, including lens profile aberrations, are provided in a displacement sensing optical encoder that uses a telecentric imaging configuration. According to the invention, the encoder is configured such that the image light that reaches the detector comprises symmetric ray bundles concentrated symmetrically on opposite sides of the optical axis center at the limiting aperture of the telecentric imaging configuration. Central ray bundles, and/or other ray bundles that have an optical path lengths significantly different than the operational symmetric ray bundles are prevented or blocked. As a result destructive interference is prevented and image contrast is improved.

摘要翻译： 在使用远心成像配置的位移感测光学编码器中提供了一种用于抑制由于光程长度差异造成的干涉影响造成的尺度图像对比度损失的方法和装置，包括透镜轮廓像差。 根据本发明，编码器被配置为使得到达检测器的图像光包括在远心成像配置的限制孔径处对称地集中在光轴中心的相对侧上的对称光束。 防止或阻止具有与操作对称光束的显着不同的光路长度的中心线束和/或其他光束束。 因此，防止了破坏性干扰并且改善了图像对比度。

公开(公告)号：US08492703B2

公开(公告)日：2013-07-23

申请号：US12535561

申请日：2009-08-04

申请人： Joseph D. Tobiason ,  Toru Yaku ,  Emi Kaneko ,  Eric H. Altendorf

发明人： Joseph D. Tobiason ,  Toru Yaku ,  Emi Kaneko ,  Eric H. Altendorf

IPC分类号： G01D5/34

CPC分类号： G01D5/34

摘要： A method and apparatus for suppressing loss of scale image contrast due to interference effects from optical path length differences, including lens profile aberrations, are provided in a displacement sensing optical encoder that uses a telecentric imaging configuration. According to the invention, the encoder is configured such that the image light that reaches the detector comprises symmetric ray bundles concentrated symmetrically on opposite sides of the optical axis center at the limiting aperture of the telecentric imaging configuration. Central ray bundles, and/or other ray bundles that have an optical path lengths significantly different than the operational symmetric ray bundles are prevented or blocked. As a result destructive interference is prevented and image contrast is improved.

摘要翻译： 在使用远心成像配置的位移感测光学编码器中提供了一种用于抑制由于光程长度差异造成的干涉影响造成的尺度图像对比度损失的方法和装置，包括透镜轮廓像差。 根据本发明，编码器被配置为使得到达检测器的图像光包括在远心成像配置的限制孔径处对称地集中在光轴中心的相对侧上的对称光束。 防止或阻止具有与操作对称光束的显着不同的光路长度的中心线束和/或其他光束束。 因此，防止了破坏性干扰并且改善了图像对比度。

公开(公告)号：US08127993B2

公开(公告)日：2012-03-06

申请号：US12227431

申请日：2007-06-01

申请人： Toru Yaku ,  Atsushi Tominaga

发明人： Toru Yaku ,  Atsushi Tominaga

IPC分类号： G06K7/14

CPC分类号： G01D5/34746 ,  G01D5/347 ,  G01D5/34707 ,  G01D5/34792

摘要： A reflection type encoder, which receives a plurality of light-receiving signals from a single scale, includes a light source, a scale having a plurality of patterns formed thereon to which light is irradiated from the light source, and a light-receiving element for receiving light reflected from each of the plurality of patterns, wherein a plurality of patterns each having different thicknesses are formed on a single track of the scale by using a dielectric substance, light of a plurality of wavelengths each having different brightnesses in accordance with differences in the thickness of the dielectric substance is irradiated from the light source, and a light-receiving signal is obtained for the respective thicknesses of the dielectric substance. Therefore, the scale can be downsized by overlapping a plurality of patterns on the same track.

摘要翻译： 从单一尺度接收多个光接收信号的反射型编码器包括光源，其上形成有从光源照射光的多个图案的标尺和用于 接收从所述多个图案中的每一个反射的光，其中通过使用电介质物质在所述刻度的单个轨道上形成各自具有不同厚度的多个图案，所述多个波长的光根据不同的亮度而具有不同的亮度 从光源照射电介质的厚度，得到电介质的厚度的光接收信号。 因此，可以通过在同一轨道上重叠多个图案来缩小尺度。

公开(公告)号：US07592584B2

公开(公告)日：2009-09-22

申请号：US11976836

申请日：2007-10-29

申请人： Takanori Otsuka ,  Kazuhiko Kodama ,  Toru Yaku

发明人： Takanori Otsuka ,  Kazuhiko Kodama ,  Toru Yaku

IPC分类号： G01D5/34

CPC分类号： G01D5/34792

摘要： An optical encoder (100) is provided with: a light-emitting element (30) including a main-signal light-emitting element (31) having a red LED (31A) that emits red light and an origin light-emitting element (32) having an infrared LED (32A) that emits infrared light; and a receiver unit (40) including a main-signal photo detector (41) that receives the red light to generate a predetermined signal and an origin photo detector (42) that receives the infrared light to generate a predetermined signal. Accordingly, even when the infrared light enters the main-signal photo detector (41) or the red light enters the origin photo detector (42), no signal is generated by the light, thereby effectively preventing crosstalk. Thus, the measurement accuracy of the optical encoder (100) can be improved.

摘要翻译： 一种光学编码器（100）具有：发光元件（30），其包括具有发射红光的红色LED（31A）和原点发光元件（32）的主信号发光元件（31） ）具有发射红外光的红外LED（32A）; 以及接收单元（40），其包括接收红光以产生预定信号的主信号光检测器（41）和接收红外光以产生预定信号的原点光电检测器（42）。 因此，即使当红外光进入主信号光检测器（41）或红光进入原色光检测器（42）时，光也不产生信号，从而有效地防止串扰。 因此，可以提高光学编码器（100）的测量精度。

公开(公告)号：US07446306B2

公开(公告)日：2008-11-04

申请号：US11675257

申请日：2007-02-15

申请人： Toru Yaku ,  Hiroaki Kawada

发明人： Toru Yaku ,  Hiroaki Kawada

IPC分类号： G01D5/34

CPC分类号： G01D5/2454 ,  G01D5/24476 ,  G01D5/34715 ,  G01D5/34746

摘要： In a photoelectric encoder (incremental encoder and absolute encoder) having a detector that is displaceable relative to a scale having a predetermined pattern (incremental pattern and pseudorandom pattern) formed thereon, the detection range, to be simultaneously detected, of the pattern is divided in at least the detection direction, and a plurality of light-receiving systems are provided to detect each of the respective detection areas, whereby measurement of a wide detection range is enabled by using a small-sized and simple optical system and light-receiving system.

摘要翻译： 在具有相对于其上形成有预定图案（增量图案和伪随机图案）的刻度可移位的检测器的光电编码器（增量编码器和绝对编码器）中，将同时检测图案的检测范围分成 至少检测方向和多个光接收系统被设置为检测每个检测区域，由此通过使用小型简单的光学系统和光接收系统来实现宽检测范围的测量。

公开(公告)号：US20070187583A1

公开(公告)日：2007-08-16

申请号：US11675257

申请日：2007-02-15

申请人： Toru Yaku ,  Hiroaki Kawada

发明人： Toru Yaku ,  Hiroaki Kawada

IPC分类号： G01D5/34

CPC分类号： G01D5/2454 ,  G01D5/24476 ,  G01D5/34715 ,  G01D5/34746

摘要： In a photoelectric encoder (incremental encoder and absolute encoder) having a detector that is displaceable relative to a scale having a predetermined pattern (incremental pattern and pseudorandom pattern) formed thereon, the detection range, to be simultaneously detected, of the pattern is divided in at least the detection direction, and a plurality of light-receiving systems are provided to detect each of the respective detection areas, whereby measurement of a wide detection range is enabled by using a small-sized and simple optical system and light-receiving system.

摘要翻译： 在具有相对于其上形成有预定图案（增量图案和伪随机图案）的刻度可移位的检测器的光电编码器（增量编码器和绝对编码器）中，将同时检测图案的检测范围分成 至少检测方向和多个光接收系统被设置为检测每个检测区域，由此通过使用小型简单的光学系统和光接收系统来实现宽检测范围的测量。

公开(公告)号：US08742321B2

公开(公告)日：2014-06-03

申请号：US13227591

申请日：2011-09-08

申请人： Ryuichi Koiso ,  Toru Yaku

发明人： Ryuichi Koiso ,  Toru Yaku

IPC分类号： G01D5/34 ,  G01B11/14 ,  H03M1/22

CPC分类号： G01D5/34715

摘要： An origin location detection circuit in an encoder. The encoder includes a scale on which an origin pattern indicating an origin is provided and a detection head relatively displaceable with respect to the scale. The origin location detection circuit includes a comparator for generating an origin signal indicating a location of the origin from an output voltage signal, which is output from a detector of the detection head and has been affected by involvement of the origin pattern; a DC voltage detection circuit smoothing the output voltage signal; and a differential amplifier circuit performing differential amplification of the output voltage signal and a DC voltage signal output from the DC voltage detection circuit. A differential amplifier signal of the differential amplifier circuit is input to the comparator.

摘要翻译： 编码器中的原点定位检测电路。 编码器包括刻度，其上提供指示原点的原点图案和相对于标尺相对移位的检测头。 原点位置检测电路包括比较器，用于从输出电压信号产生指示原点位置的原点信号，该输出电压信号从检测头的检测器输出并受到原始图案的影响; 直流电压检测电路平滑输出电压信号; 以及差分放大电路，对所述输出电压信号进行差分放大，以及从所述直流电压检测电路输出的直流电压信号。 差分放大器电路的差分放大器信号被输入到比较器。

公开(公告)号：US08637805B2

公开(公告)日：2014-01-28

申请号：US12956992

申请日：2010-11-30

申请人： Eric Herbert Altendorf ,  Tatsuya Nagahama ,  Miyako Mizutani ,  Toru Yaku

发明人： Eric Herbert Altendorf ,  Tatsuya Nagahama ,  Miyako Mizutani ,  Toru Yaku

IPC分类号： G01D5/34

CPC分类号： G01D5/34

摘要： 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 readhead 3 having a light source 31 that emits light to the scale track 2′, a scale-side lens 32 that transmits the light emitted from the light source 31 to the scale track 2′, and a light receiving element 33 that receives the light reflected by the scale track 2′ through the scale-side lens 32. The light source 31 is arranged between the scale-side lens 32 and the light receiving element 33. An optical axis Lsrc of the light source 31 is matched with an optical axis Ls of the scale-side lens 32 in a reading direction of the scale 2 and is separated from an optical axis Ls of the scale-side lens 32 by a predetermined distance D in a direction perpendicular to the reading direction of the scale 2.

摘要翻译： 提供能够在光接收元件中获得足够量的光的小型化光学编码器。 光学编码器1包括具有刻度轨道2'的标尺2和具有向标尺轨道2'发射光的光源31的读取头3，将从光源31发射的光透射到比例侧透镜32 刻度轨道2'，以及光接收元件33，其接收由刻度轨道2'反射的光通过刻度侧透镜32.光源31配置在刻度侧透镜32与受光元件33之间 光标31的光轴Lsrc在刻度尺2的读取方向上与刻度侧透镜32的光轴Ls匹配，并且与标尺侧透镜32的光轴Ls分离预定的 距离D与标尺2的读取方向垂直的方向。

公开(公告)号：US20110233390A1

公开(公告)日：2011-09-29

申请号：US12955744

申请日：2010-11-29

申请人： Tatsuya Nagahama ,  Miyako Mizutani ,  Toru Yaku

发明人： Tatsuya Nagahama ,  Miyako Mizutani ,  Toru Yaku

IPC分类号： G01D5/34

CPC分类号： G01D5/34715

摘要： 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 readhead 3 having a light source 31 that emits light to the scale 2, a scale-side lens 32 that transmits the light emitted from the light source 31 to the scale 2, and a light receiving element 33 that receives the light that has been reflected by the scale 2 and that has passed through the scale-side lens 32. The light source 31 is arranged between the scale-side lens 32 and the light receiving element 33, and a distance between the light source 31 and the scale-side lens 32 is set to be a focal distance fs of the scale-side lens 32. An optical axis Lsrc of the light source 31 is matched with an optical axis Ls of the scale-side lens 32 in a reading direction of the scale markings 21 and is separated from an optical axis Ls of the scale-side lens 32 by a predetermined distance D in a direction perpendicular to the reading direction of the scale markings 21.

摘要翻译： 提供能够在光接收元件中获得足够量的光的小型化光学编码器。 光学编码器1包括具有刻度标记21的标尺2和具有向标尺2发光的光源31的读取头3，将从光源31发射的光透射到标尺2的刻度侧透镜32， 以及受光元件33，其接收由标尺2反射并且已经通过刻度侧透镜32的光。光源31配置在刻度侧透镜32与受光元件33之间， 并且光源31和刻度侧透镜32之间的距离被设置为刻度侧透镜32的焦距fs。光源31的光轴Lsrc与刻度尺透镜32的光轴Ls匹配 在透镜32的尺寸标记21的读取方向上，与标尺侧透镜32的光轴Ls在垂直于刻度标记21的读取方向的方向上隔开预定的距离D。