公开(公告)号：US07435945B2

公开(公告)日：2008-10-14

申请号：US11475481

申请日：2006-06-26

申请人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani

发明人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani

IPC分类号： G01D5/34 ,  G01D5/36 ,  G01B11/14 ,  H03M1/22

CPC分类号： G01D5/38 ,  G01D5/00 ,  G01D5/34715 ,  G01D5/36

摘要： A displacement measuring device including a scale, and an optical readhead including an index pattern and a light receiving element is provided. A bright/dark pattern arising from a scale grating is detected by the readhead to measure displacement. In various embodiments, a magnification of the pattern is adjusted by the spacing between at least a lens element, aperture element, and detection plane of the readhead. An aperture can be designed to provide a diffraction-limited telecentric imaging configuration that filters an image of the scale grating to provide a sinusoidal intensity pattern that supports highly interpolated measurements. An aperture dimension, selected in relation to the grating pitch and other parameters, can provide a desirable combination of readhead operating characteristics including one or more of a desired depth of field; degree of spatial filtering; and optical signal power.

摘要翻译： 提供了包括刻度的位移测量装置和包括索引图案和光接收元件的光学读取头。 通过读取头检测由刻度光栅引起的亮/暗图案以测量位移。 在各种实施例中，通过至少透镜元件，光圈元件和读取头的检测平面之间的间隔来调整图案的放大倍数。 可以设计孔径以提供衍射限制的远心成像配置，其过滤尺度光栅的图像以提供支持高度内插测量的正弦强度图案。 相对于光栅间距和其他参数选择的孔径尺寸可以提供包括期望景深中的一个或多个的读取头操作特性的期望组合; 空间滤波度; 和光信号功率。

公开(公告)号：US07570433B2

公开(公告)日：2009-08-04

申请号：US10599105

申请日：2005-03-18

申请人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani ,  Eric Herbert Altendorf ,  Joseph Daniel Tobiason

发明人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani ,  Eric Herbert Altendorf ,  Joseph Daniel Tobiason

IPC分类号： G02B13/22

CPC分类号： G01D5/38 ,  G01D5/00 ,  G01D5/34715 ,  G01D5/36

摘要： A photoelectric encoder has a telecentric optical system in which a first lens and an aperture located at a focal position of the first lens are interposed between a main scale and a photoreceptor. At least a second lens is interposed between the aperture and the photoreceptor with a focus of the second lens on the aperture, thereby constituting a bilateral telecentric optical system. This makes it possible to improve the signal detection efficiency and increase the assembly tolerance.

摘要翻译： 光电编码器具有远心光学系统，其中位于第一透镜的焦点位置处的第一透镜和孔插入主刻度尺和感光体之间。 在孔和感光体之间插入至少第二透镜，第二透镜的焦点在孔上，从而构成双向远心光学系统。 这使得可以提高信号检测效率并增加组装公差。

公开(公告)号：US20070215797A1

公开(公告)日：2007-09-20

申请号：US10599105

申请日：2005-03-18

申请人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani ,  Eric Altendorf ,  Joseph Tobiason

发明人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani ,  Eric Altendorf ,  Joseph Tobiason

IPC分类号： G01D5/34

CPC分类号： G01D5/38 ,  G01D5/00 ,  G01D5/34715 ,  G01D5/36

摘要： A photoelectric encoder has a telecentric optical system in which a first lens and an aperture located at a focal position of the first lens are interposed between a main scale and a photoreceptor. At least a second lens is interposed between the aperture and the photoreceptor with a focus of the second lens on the aperture, thereby constituting a bilateral telecentric optical system. This makes it possible to improve the signal detection efficiency and increase the assembly tolerance.

摘要翻译： 光电编码器具有远心光学系统，其中位于第一透镜的焦点位置处的第一透镜和孔插入主刻度尺和感光体之间。 在孔和感光体之间插入至少第二透镜，第二透镜的焦点在孔上，从而构成双向远心光学系统。 这使得可以提高信号检测效率并增加组装公差。

公开(公告)号：US07186969B2

公开(公告)日：2007-03-06

申请号：US10804636

申请日：2004-03-19

申请人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani ,  Eric Herbert Altendorf ,  Joseph Daniel Tobiason

发明人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani ,  Eric Herbert Altendorf ,  Joseph Daniel Tobiason

IPC分类号： G01D5/34 ,  G01D5/36

CPC分类号： G01D5/38 ,  G01D5/00 ,  G01D5/34715 ,  G01D5/36

摘要： A displacement measuring device including a scale, and an optical readhead including an index pattern and a light receiving element is provided. A bright/dark pattern arising from a scale grating is detected by the readhead to measure displacement. In various embodiments, a magnification of the pattern is adjusted by the spacing between at least a lens element, aperture element, and detection plane of the readhead. An aperture can be designed to provide a diffraction-limited telecentric imaging configuration that filters an image of the scale grating to provide a sinusoidal intensity pattern that supports highly interpolated measurements. An aperture dimension, selected in relation to the grating pitch and other parameters, can provide a desirable combination of readhead operating characteristics including one or more of a desired depth of field; degree of spatial filtering; and optical signal power.

公开(公告)号：US20070018084A1

公开(公告)日：2007-01-25

申请号：US11475481

申请日：2006-06-26

申请人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani

发明人： Toshitaka Shimomura ,  Shingo Nihommori ,  Miyako Mizutani

IPC分类号： G01D5/34

CPC分类号： G01D5/38 ,  G01D5/00 ,  G01D5/34715 ,  G01D5/36

摘要： A displacement measuring device including a scale, and an optical readhead including an index pattern and a light receiving element is provided. A bright/dark pattern arising from a scale grating is detected by the readhead to measure displacement. In various embodiments, a magnification of the pattern is adjusted by the spacing between at least a lens element, aperture element, and detection plane of the readhead. An aperture can be designed to provide a diffraction-limited telecentric imaging configuration that filters an image of the scale grating to provide a sinusoidal intensity pattern that supports highly interpolated measurements. An aperture dimension, selected in relation to the grating pitch and other parameters, can provide a desirable combination of readhead operating characteristics including one or more of a desired depth of field; degree of spatial filtering; and optical signal power.

摘要翻译： 提供了包括刻度的位移测量装置和包括索引图案和光接收元件的光学读取头。 通过读取头检测由刻度光栅引起的亮/暗图案以测量位移。 在各种实施例中，通过至少透镜元件，光圈元件和读取头的检测平面之间的间隔来调整图案的放大倍数。 可以设计孔径以提供衍射限制的远心成像配置，其过滤尺度光栅的图像以提供支持高度内插测量的正弦强度图案。 相对于光栅间距和其他参数选择的孔径尺寸可以提供包括期望景深中的一个或多个的读取头操作特性的期望组合; 空间滤波度; 和光信号功率。

公开(公告)号：US07307789B2

公开(公告)日：2007-12-11

申请号：US11371759

申请日：2006-03-09

申请人： Miyako Mizutani

发明人： Miyako Mizutani

IPC分类号： G02B27/10

CPC分类号： G01D5/34784

摘要： A photoelectric encoder is provided which has an optical system including a first lens array inserted between a main scale and a light receiving element. An image divided or reversed by the first lens array can be electrically or optically re-reversed. This can achieve the reduction of the entire size as well as increase in the scale field of view, while maintaining the image shape and/or pattern.

摘要翻译： 提供一种具有光学系统的光电编码器，该光学系统包括插入主标尺和光接收元件之间的第一透镜阵列。 由第一透镜阵列分割或反转的图像可以电或光学地反向。 这可以在保持图像形状和/或图案的同时实现整体尺寸的减小以及尺寸视野的增加。

公开(公告)号：US20060202112A1

公开(公告)日：2006-09-14

申请号：US11371759

申请日：2006-03-09

申请人： Miyako Mizutani

发明人： Miyako Mizutani

IPC分类号： G01D5/34

CPC分类号： G01D5/34784

摘要： A photoelectric encoder is provided which has an optical system including a first lens array inserted between a main scale and a light receiving element. An image divided or reversed by the first lens array can be electrically or optically re-reversed. This can achieve the reduction of the entire size as well as increase in the scale field of view, while maintaining the image shape and/or pattern.

摘要翻译： 提供一种具有光学系统的光电编码器，该光学系统包括插入主标尺和光接收元件之间的第一透镜阵列。 由第一透镜阵列分割或反转的图像可以电或光学地反向。 这可以在保持图像形状和/或图案的同时实现整体尺寸的减小以及尺寸视野的增加。

公开(公告)号：US08476577B2

公开(公告)日：2013-07-02

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。

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：US20060202113A1

公开(公告)日：2006-09-14

申请号：US11371973

申请日：2006-03-09

申请人： Miyako Mizutani ,  Tatsuya Nagahama

发明人： Miyako Mizutani ,  Tatsuya Nagahama

IPC分类号： G01D5/34

CPC分类号： G01D5/34715

摘要： 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 plane of the light receiving element are disposed so as to intersect at a single point and satisfy the Scheimpflug rule. Focus can thereby be obtained over the entire image plane, so that a reduction in contrast is prevented, even if the optical axis is inclined to make an optical system smaller.

摘要翻译： 一种具有透镜光学系统的光电编码器，该透镜光学系统包括插入主标尺和光接收元件之间的透镜。 在光电编码器中，从主刻度表面延伸的三个平面，透镜的主平面和光接收元件的像面设置成在单点相交并满足Scheimpflug规则。 因此可以在整个图像平面上获得聚焦，从而即使光轴倾斜以使光学系统更小，也可以防止对比度的降低。