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1. 发明申请

US20050007598A1 Optical encoder 有权
标题翻译：光学编码器
公开(公告)号：US20050007598A1
公开(公告)日：2005-01-13
申请号：US10915348
申请日：2004-08-11
申请人： Kou Ishizuka
发明人： Kou Ishizuka
IPC分类号： G01D5/38 , G02B5/18 , G02B5/30 , G01B9/02
CPC分类号： G01D5/38
摘要： A light beam emitted from a semiconductor-laser light source is projected onto a diffraction-grating scale after passing through a collimator lens, a beam splitter and a central portion of an annular reflection grating. Two diffracted light beams reflected from the diffraction-grating scale are projected onto the annular reflection grating. The annular reflection grating diffracts the light beams projected onto all portions thereon to a substantially original direction to be projected onto and diffracted from the same position on the diffraction-grating scale. The diffracted light beams are superposed and the resultant light beam is returned to the beam splitter. The light beam is guided by the beam splitter in a direction different from the semiconductor-laser light source, and is detected by a photosensor as an interference light beam. Even if the oscillation wavelength of the semiconductor-laser light source changes, for example, due to a change in the temperature environment, to change the diffraction angles of the diffracted light beams, the light beams are diffracted with original diffraction angles by the annular reflection grating, the position of rediffraction by the diffraction-grating scale and the state of emitted light beams are invariable. Hence, the state of interference is stable.
摘要翻译：从半导体激光光源射出的光束经过准直透镜，分束器和环形反射光栅的中心部分投影到衍射光栅刻度上。从衍射光栅标尺反射的两个衍射光束被投射到环形反射光栅上。环形反射光栅将投影到其上的所有部分上的光束衍射到基本上原始的方向，以投影到衍射光栅标尺上的相同位置并衍射。衍射光束被重叠，所得到的光束返回到分束器。光束由分束器沿与半导体激光光源不同的方向引导，并被光电传感器检测为干涉光束。即使半导体激光光源的振荡波长例如由于温度环境的变化而变化，为了改变衍射光束的衍射角，光束以原始的衍射角被环形反射衍射光栅，通过衍射光栅标度的再衍射位置和发射光束的状态是不变的。因此，干扰状态是稳定的。

2. 发明授权

US5956140A Displacement detection apparatus and drive control apparatus using the same constructed to prevent collision between gratings 失效
标题翻译：位移检测装置和使用相同结构的驱动控制装置，以防止光栅之间的碰撞
公开(公告)号：US5956140A
公开(公告)日：1999-09-21
申请号：US604384
申请日：1996-02-21
申请人： Kou Ishizuka , Takayuki Kadoshima
发明人： Kou Ishizuka , Takayuki Kadoshima
IPC分类号： G01D5/38 , G01B9/02
CPC分类号： G01D5/38
摘要： An apparatus for obtaining displacement information relative to a member includes a light source for illuminating a phase type diffraction grating on the member, an amplitude grating arranged at the position where interference fringes are generated immediately after emerging of diffracted light from the phase type diffraction grating illuminated by the light source, and a light-receiving element for receiving light emerging from the amplitude grating. The light-receiving element generates a periodic signal as displacement information upon relative movement of the member.
摘要翻译：用于获得相对于构件的位移信息的装置包括：用于照射构件上的相位衍射光栅的光源;布置在立体上产生干涉条纹的位置上的振幅光栅，该相位型衍射光栅从相位型衍射光栅发出的衍射光以及用于接收从振幅光栅出射的光的光接收元件。光接收元件在构件的相对移动时产生周期性信号作为位移信息。

3. 发明授权

US5917182A Rotation detector and controller for detecting rotation information using a grating interference system 失效
标题翻译：旋转检测器和控制器，用于使用光栅干涉系统检测旋转信息
公开(公告)号：US5917182A
公开(公告)日：1999-06-29
申请号：US597102
申请日：1996-02-06
申请人： Kou Ishizuka
发明人： Kou Ishizuka
IPC分类号： G01B11/26 , G01D5/38 , G01B11/14
CPC分类号： G01D5/38
摘要： In an apparatus for detecting information on the rotation of an object using a grating interference system, the present invention provides a rotation detecting apparatus, which can be sufficiently miniaturized even when using another rotation information detecting section at the same time, and an apparatus for controlling the rotation using the same. The apparatus has a first detecting device for detecting by making the diffracted light from the diffraction grating interfere to detect rotation information of the object, a second detecting device for detecting the light from the predetermined data recording section to detect rotation information of the object, and a light beam illuminating device common to the first and second detecting means for illuminating the diffraction grating and the predetermined data recording section together.
摘要翻译：在使用光栅干涉系统检测物体的旋转信息的装置中，本发明提供一种旋转检测装置，即使在同时使用其他旋转信息检测部的情况下也能够充分地小型化，旋转使用相同。该装置具有用于通过使来自衍射光栅的衍射光干涉来检测物体的旋转信息进行检测的第一检测装置，用于检测来自预定数据记录部分的光以检测物体的旋转信息的第二检测装置，以及第一和第二检测装置共用的光束照明装置，用于将衍射光栅和预定数据记录部分一起照射。

4. 发明授权

US5880839A Optical displacement measuring apparatus including a light-emitting element and an adjacent ball lens 失效
标题翻译：光学位移测量装置包括发光元件和相邻的球透镜
公开(公告)号：US5880839A
公开(公告)日：1999-03-09
申请号：US949193
申请日：1997-10-14
申请人： Kou Ishizuka , Yasushi Kaneda
发明人： Kou Ishizuka , Yasushi Kaneda
IPC分类号： G01D5/38 , G01B11/00 , G01D5/36 , G01B9/02
CPC分类号： G01D5/38
摘要： An optical displacement detecting apparatus is provided for detecting information on a relative displacement with respect to an object having a diffraction grating. The apparatus includes a light-emitting element for emitting a diverging light beam, a ball lens for converting the diverging light beam from the light-emitting element into a nearly collimated beam, a grating interference optical system for using the light beam from the ball lens to finally form interference light in such a form that two diffracted light beams from the diffraction grating are coupled, and a light detecting element for detecting the interference light from the grating interference optical system, wherein the relative displacement information with respect to the object is attained from a periodic signal from the light detecting element.
摘要翻译：提供一种光学位移检测装置，用于检测关于具有衍射光栅的物体的相对位移的信息。该装置包括用于发射发散光束的发光元件，用于将发光元件的发散光束转换成几乎准直的光束的球透镜，用于使用来自球透镜的光束的光栅干涉光学系统最终以衍射光栅的两个衍射光束耦合的形式形成干涉光，以及用于检测来自光栅干涉光学系统的干涉光的光检测元件，其中获得相对于物体的相对位移信息来自光检测元件的周期信号。

5. 发明授权

US06999179B2 Optical encoder 有权
标题翻译：光学编码器
公开(公告)号：US06999179B2
公开(公告)日：2006-02-14
申请号：US10915348
申请日：2004-08-11
申请人： Kou Ishizuka
发明人： Kou Ishizuka
IPC分类号： G01B9/02 , G01D5/34
CPC分类号： G01D5/38
摘要： A light beam emitted from a semiconductor-laser light source is projected onto a diffraction-grating scale after passing through a collimator lens, a beam splitter and a central portion of an annular reflection grating. Two diffracted light beams reflected from the diffraction-grating scale are projected onto the annular reflection grating. The annular reflection grating diffracts the light beams projected onto all portions thereon to a substantially original direction to be projected onto and diffracted from the same position on the diffraction-grating scale. The diffracted light beams are superposed and the resultant light beam is returned to the beam splitter. The light beam is guided by the beam splitter in a direction different from the semiconductor-laser light source, and is detected by a photosensor as an interference light beam. Even if the oscillation wavelength of the semiconductor-laser light source changes, for example, due to a change in the temperature environment, to change the diffraction angles of the diffracted light beams, the light beams are diffracted with original diffraction angles by the annular reflection grating, the position of rediffraction by the diffraction-grating scale and the state of emitted light beams are invariable. Hence, the state of interference is stable.
摘要翻译：从半导体激光光源射出的光束经过准直透镜，分束器和环形反射光栅的中心部分投影到衍射光栅刻度上。从衍射光栅标尺反射的两个衍射光束被投射到环形反射光栅上。环形反射光栅将投影到其上的所有部分上的光束衍射到基本上原始的方向上，以投射到衍射光栅标尺上的相同位置并衍射。衍射光束被重叠，所得到的光束返回到分束器。光束由分束器沿与半导体激光光源不同的方向引导，并被光电传感器检测为干涉光束。即使半导体激光光源的振荡波长例如由于温度环境的变化而变化，为了改变衍射光束的衍射角，光束以原始的衍射角被环形反射衍射光栅，通过衍射光栅标度的再衍射位置和发射光束的状态是不变的。因此，干扰状态是稳定的。

6. 发明授权

US6005667A Optical displacement measurement apparatus and information recording apparatus 失效
标题翻译：光位移测量装置和信息记录装置
公开(公告)号：US6005667A
公开(公告)日：1999-12-21
申请号：US897548
申请日：1997-07-21
申请人： Makoto Takamiya , Kou Ishizuka
发明人： Makoto Takamiya , Kou Ishizuka
IPC分类号： G01D5/38 , G11B5/55 , G11B5/596 , G01B9/02
CPC分类号： G11B5/5526 , G01D5/38 , G11B5/59605 , G11B5/59677
摘要： This invention relates to an apparatus for optically measuring the relative displacement of an object with a diffraction grating, and the apparatus has a light projection system for spot-projecting a light beam onto the diffraction grating and light detection means for receiving an interference light beam obtained by multiplexing diffracted light beams of different orders from the spot projection position on the diffraction grating in a state in which the wavefronts of the diffracted light beams are matched with each other. The relative displacement of the object is measured upon light reception of the light detection means.
摘要翻译：本发明涉及一种用于光学测量物体与衍射光栅的相对位移的装置，该装置具有用于将光束点投影到衍射光栅上的光投影系统和用于接收获得的干涉光束的光检测装置通过在衍射光束的波前彼此匹配的状态下将不同阶数的衍射光束与衍射光栅上的点投影位置进行多路复用。在光检测装置的光接收时测量物体的相对位移。

7. 发明授权

US5663794A Displacement information detection apparatus, scale used in the apparatus, and drive apparatus using the apparatus 失效
标题翻译：位移信息检测装置，装置中使用的标尺，以及使用该装置的驱动装置
公开(公告)号：US5663794A
公开(公告)日：1997-09-02
申请号：US601694
申请日：1996-02-15
申请人： Kou Ishizuka
发明人： Kou Ishizuka
IPC分类号： F02B75/02 , G01B11/00 , G01D5/36 , G01D5/38 , G61B9/02
CPC分类号： G01D5/38 , F02B2075/027
摘要： An apparatus for detecting displacement information is disclosed. The apparatus is provided with a scale arranged on the side of an object of which relative displacement information is to be detected, a periodic signal generation diffraction grating formed at a predetermined pitch, and a predetermined data recording portion formed independently of the periodic signal generation and diffraction grating for detecting displacement information, a first detection system for irradiating a light beam onto the periodic signal generation diffraction grating to generate diffracted light, the first detection system forming a periodic signal corresponding to a displacement relative to the scale by detecting interference light of the diffracted light generated by the periodic signal generation diffraction grating, and a second detection system for optically detecting the predetermined data recording portion. The predetermined data recording portion also has a diffraction grating.
摘要翻译：公开了一种用于检测位移信息的装置。该装置设置有布置在要检测相对位移信息的对象侧的刻度，以预定间距形成的周期性信号生成衍射光栅和独立于周期性信号产生形成的预定数据记录部分，以及用于检测位移信息的衍射光栅，用于将光束照射到周期性信号产生衍射光栅上以产生衍射光的第一检测系统，所述第一检测系统通过检测所述衍射光的干涉光来形成对应于相对于标尺的位移的周期信号由周期信号产生衍射光栅产生的衍射光，以及用于光学检测预定数据记录部分的第二检测系统。预定数据记录部分也具有衍射光栅。

8. 发明授权

US06259531B1 Displacement information measuring apparatus with hyperbolic diffraction grating 有权
$Displacement information measuring apparatus with hyperbolic diffraction grating$
标题翻译：具有双曲线衍射光栅的位移信息测量装置
公开(公告)号：US06259531B1
公开(公告)日：2001-07-10
申请号：US09333043
申请日：1999-06-15
申请人： Makoto Takamiya , Hidejiro Kadowaki , Kou Ishizuka , Yasushi Kaneda
发明人： Makoto Takamiya , Hidejiro Kadowaki , Kou Ishizuka , Yasushi Kaneda
IPC分类号： G01B902
CPC分类号： G01S17/58 , G01D5/34707 , G01P3/366
摘要： An apparatus for detecting the displacement information of an object has a light source, a diffraction grating for diffracting a light beam from the light source so that the light beam diffracted by the diffraction grating is incident on the object, and a photodetector for detecting the light from the object caused upon the incidence of the light beam thereon by the diffraction grating. Information regarding the relative displacement to the object along a predetermined direction is detected on the basis of a light detection signal from the photodetector. The diffraction grating is formed so that the light beam applied to the object may be condensed on the object in a direction in which the relative displacement to the object cannot be detected by the signal from the photodetector.
摘要翻译：用于检测物体的位移信息的装置具有光源，用于衍射来自光源的光束的衍射光栅，使得被衍射光栅衍射的光束入射到物体上，以及用于检测光的光电检测器由衍射光栅在其上的光束的入射引起的物体。基于来自光电检测器的光检测信号来检测关于沿着预定方向到物体的相对位移的信息。衍射光栅被形成为使得施加到物体的光束可以在物体上沿着与来自光电检测器的信号不能检测到物体的相对位移的方向上会聚在物体上。

9. 发明授权

US5742391A Optical type sensor for use as an optical measuring head or optical pickup 失效
标题翻译：用作光学测量头或光学拾取器的光学型传感器
公开(公告)号：US5742391A
公开(公告)日：1998-04-21
申请号：US579347
申请日：1995-12-27
申请人： Yasushi Kaneda , Kou Ishizuka , Kenji Hisamoto
发明人： Yasushi Kaneda , Kou Ishizuka , Kenji Hisamoto
IPC分类号： G01D5/30 , G01B11/00 , G01D5/36 , G01D5/38 , G01B9/02
CPC分类号： G01D5/38
摘要： An optical type sensor has a light emitting element, a light receiving element, at least one optical element acting on a light beam emitted from the light emitting element, in an optical path till the light beam enters the light receiving element, and a spacer member disposed to define a spacing between the light emitting element and/or the light receiving element and the at least one optical element, the spacer member having a structure for being mounted to other member.
摘要翻译：光学型传感器具有发光元件，光接收元件，至少一个作用在从发光元件发射的光束上的光学元件，直到光束进入光接收元件的光路中，以及间隔元件设置成限定发光元件和/或光接收元件与至少一个光学元件之间的间隔，间隔元件具有用于安装到其它元件的结构。

10. 发明授权

US06831267B2 Optical encoder 有权
标题翻译：光学编码器
公开(公告)号：US06831267B2
公开(公告)日：2004-12-14
申请号：US09780433
申请日：2001-02-12
申请人： Kou Ishizuka
发明人： Kou Ishizuka
IPC分类号： H01J314
CPC分类号： G01D5/38
摘要： A light beam emitted from a semiconductor-laser light source is projected onto a diffraction-grating scale after passing through a collimator lens, a beam splitter and a central portion of an annular reflection grating. Two diffracted light beams reflected from the diffraction-grating scale are projected onto the annular reflection grating. The annular reflection grating diffracts the light beams projected onto all portions thereon to a substantially original direction to be projected onto and diffracted from the same position on the diffraction-grating scale. The diffracted light beams are superposed and the resultant light beam is returned to the beam splitter. The light beam is guided by the beam splitter in a direction different from the semiconductor-laser light source, and is detected by a photosensor as an interference light beam. Even if the oscillation wavelength of the semiconductor-laser light source changes, for example, due to a change in the temperature environment, to change the diffraction angles of the diffracted light beams, the light beams are diffracted with original diffraction angles by the annular reflection grating, the position of rediffraction by the diffraction-grating scale and the state of emitted light beams are invariable. Hence, the state of interference is stable.
摘要翻译：从半导体激光光源射出的光束经过准直透镜，分束器和环形反射光栅的中心部分投影到衍射光栅刻度上。从衍射光栅标尺反射的两个衍射光束被投射到环形反射光栅上。环形反射光栅将投影到其上的所有部分上的光束衍射到基本上原始的方向上，以投影到衍射光栅标尺上的相同位置并衍射。衍射光束被重叠，所得到的光束返回到分束器。光束由分束器沿与半导体激光光源不同的方向引导，并被光电传感器检测为干涉光束。即使半导体激光光源的振荡波长例如由于温度环境的变化而变化，为了改变衍射光束的衍射角，光束以原始的衍射角被环形反射衍射光栅，通过衍射光栅标度的再衍射位置和发射光束的状态是不变的。因此，干扰状态是稳定的。

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