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公开(公告)号：US06972402B2
公开(公告)日：2005-12-06
申请号：US10448423
申请日：2003-05-30
申请人： Yoichi Ohmura , Toru Oka , Toshiro Nakashima , Hajime Nakajima , Hirokazu Sakuma , Takashi Okamuro , Masahiko Sakamoto , Koichi Sugimoto
发明人： Yoichi Ohmura , Toru Oka , Toshiro Nakashima , Hajime Nakajima , Hirokazu Sakuma , Takashi Okamuro , Masahiko Sakamoto , Koichi Sugimoto
IPC分类号： G01D5/34
CPC分类号： G01D5/342
摘要： A photoelectric rotary encoder includes a light source that emits a light beam, a returning section that returns the emitted light beam to a direction opposite to an emitting direction of the beam, and a photodetector that is disposed on a substrate on which the light source is disposed and that detects the returned light beam via a disk having a detection pattern section. The photoelectric rotary encoder detects rotational displacement of the disk based on the detected returned light beam. In this photoelectric rotary encoder, an optical element that lets a stray beam component of the light beam from the light source escape via a side surface of the optical element, is disposed in front of the substrate on which the light source and the photodetector are disposed. The optical element covers the substrate and integrates the optical element and the substrate.
摘要翻译： 光电旋转编码器包括发射光束的光源，将发射光束返回到与光束的发射方向相反的方向的返回部分;以及光电检测器，其设置在基板上，光源为 并且经由具有检测图案部分的盘检测返回的光束。 光电旋转编码器基于检测到的返回光束检测盘的旋转位移。 在该光电式旋转编码器中，将光源的光束成分从光源经由光学元件的侧面排出的光学元件设置在其上配置有光源和光电检测器的基板的前方 。 光学元件覆盖基板并且对光学元件和基板进行积分。
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公开(公告)号：US06956200B2
公开(公告)日：2005-10-18
申请号：US10765861
申请日：2004-01-29
申请人： Yoichi Ohmura , Toru Oka , Hajime Nakajima , Hirokazu Sakuma , Takashi Okamuro
发明人： Yoichi Ohmura , Toru Oka , Hajime Nakajima , Hirokazu Sakuma , Takashi Okamuro
CPC分类号： H03M1/0678 , G01D5/347 , G01D5/34707 , G01D5/34715 , H03M1/301
摘要： A scale generates a periodic light-intensity distribution pattern having a pitch upon irradiation by emission light from a light source. Light-detecting element groups are shifted relative to the scale to generate phase signals having fixed phase differences. Light-detecting elements are adjacently positioned to have the same phase to form each light-detecting element group. Area centers of gravity on a phase axis of the light-detecting element groups having a fixed phase difference are made coincident with each other.
摘要翻译： 刻度产生在从光源发射的光照射时具有间距的周期性光强分布图案。 光检测元件组相对于刻度移位以产生具有固定相位差的相位信号。 光检测元件被相邻地定位成具有相同的相位以形成每个光检测元件组。 使具有固定相位差的光检测元件组的相位轴上的重心面重合。
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公开(公告)号：US20070034786A1
公开(公告)日：2007-02-15
申请号：US10555101
申请日：2004-08-23
CPC分类号： G01D5/36 , G01D5/34707
摘要： In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enter a light emitting portion of the light source and a reflecting portion around the light emitting portion.
摘要翻译： 在包括其中布置有光透射部分和光不透明部分的光学标尺的光学编码器中，并且通过发射入射光获得的输出图案用作光学代码，光源部分和光检测部分， 光不透明部分由至少一对倾斜表面构成，所述至少一对倾斜表面以相对于彼此更远离入射光入射侧的方式相对的方式构成，使得入射光的入射角 来自光源的入射光不应小于临界入射角，并且光非透明部分被构造成使得入射到一个倾斜表面的入射光应该被全反射以进入另一个倾斜表面，然后 入射光的至少一部分应该在另一个倾斜表面上反射，并且在另一个倾斜表面上反射的反射光倾斜 表面不应该进入光源的发光部分和围绕发光部分的反射部分。
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公开(公告)号：US20080277569A1
公开(公告)日：2008-11-13
申请号：US11854635
申请日：2007-09-13
IPC分类号： G01D5/34
CPC分类号： G01D5/36 , G01D5/34707
摘要： In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enter a light emitting portion of the light source and a reflecting portion around the light emitting portion.
摘要翻译： 在包括其中布置有光透射部分和光不透明部分的光学标尺的光学编码器中，并且通过发射入射光获得的输出图案用作光学代码，光源部分和光检测部分， 光不透明部分由至少一对倾斜表面构成，所述至少一对倾斜表面以相对于彼此更远离入射光入射侧的方式相对的方式构成，使得入射光的入射角 来自光源的入射光不应小于临界入射角，并且光非透明部分被构造成使得入射到一个倾斜表面的入射光应该被全反射以进入另一个倾斜表面，然后 入射光的至少一部分应该在另一个倾斜表面上反射，并且在另一个倾斜表面上反射的反射光倾斜 表面不应该进入光源的发光部分和围绕发光部分的反射部分。
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5.发明授权Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces 有权具有减弱的反射光误差的光学编码器具有具有倾斜表面的光不透明部分公开(公告)号：US07285769B2
公开(公告)日：2007-10-23
申请号：US10555101
申请日：2004-08-23
IPC分类号： G01D5/34
CPC分类号： G01D5/36 , G01D5/34707
摘要： In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enter a light emitting portion of the light source and a reflecting portion around the light emitting portion.
摘要翻译： 在包括其中布置有光透射部分和光不透明部分的光学标尺的光学编码器中，并且通过发射入射光获得的输出图案用作光学代码，光源部分和光检测部分， 光不透明部分由至少一对倾斜表面构成，所述至少一对倾斜表面以相对于彼此更远离入射光入射和设定的一侧的方式构成，使得光轴的光轴的入射角 来自光源的入射光不应小于临界入射角，并且光非透明部分被构造成使得入射到一个倾斜表面的入射光应该被全反射以进入另一个倾斜表面，然后 入射光的至少一部分应该在另一个倾斜表面上反射，并且在另一个倾斜表面上反射的反射光倾斜 表面不应该进入光源的发光部分和围绕发光部分的反射部分。
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6.发明授权Optical encoder having a no track portion of an optical scale being placed at a position symmetrical to a light non-transparent portion within an irradiation region of incident light 有权在光入射光的照射区域内具有光学刻度的无轨道部分的光学编码器被放置在与光不透明部分对称的位置公开(公告)号：US07538313B2
公开(公告)日：2009-05-26
申请号：US11854635
申请日：2007-09-13
IPC分类号： G01D5/34
CPC分类号： G01D5/36 , G01D5/34707
摘要： In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enter a light emitting portion of the light source and a reflecting portion around the light emitting portion.
摘要翻译： 在包括其中布置有光透射部分和光不透明部分的光学标尺的光学编码器中，并且通过发射入射光获得的输出图案用作光学代码，光源部分和光检测部分， 光不透明部分由至少一对倾斜表面构成，所述至少一对倾斜表面以相对于彼此更远离入射光入射侧的方式相对的方式构成，使得入射光的入射角 来自光源的入射光不应小于临界入射角，并且光非透明部分被构造成使得入射到一个倾斜表面的入射光应该被全反射以进入另一个倾斜表面，然后 入射光的至少一部分应该在另一个倾斜表面上反射，并且在另一个倾斜表面上反射的反射光倾斜 表面不应该进入光源的发光部分和围绕发光部分的反射部分。
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公开(公告)号：US07470892B2
公开(公告)日：2008-12-30
申请号：US10598450
申请日：2004-08-05
申请人： Yoichi Ohmura , Toru Oka , Hajime Nakajima
发明人： Yoichi Ohmura , Toru Oka , Hajime Nakajima
IPC分类号： H01J3/14
CPC分类号： G01D5/38
摘要： An optical encoder includes an incoherent light source; a first grating, which is an amplitude grating having a first grating period, for spatial amplitude modulation of the incoherent light from the light source; a second grating, which is a phase grating having a second grating period, for spatial phase modulation of light from the first grating; a third grating, which is an amplitude grating having a third grating period, for spatial amplitude modulation of light from the second grating; and a light detecting element for detecting light from the third grating. The encoder detects relative displacement between the respective gratings. The optical transfer function from the light source to the light detecting element is enhanced, and the efficiency in utilizing light is improved.
摘要翻译： 光学编码器包括非相干光源; 第一光栅，其是具有第一光栅周期的幅度光栅，用于来自光源的非相干光的空间幅度调制; 第二光栅，其是具有第二光栅周期的相位光栅，用于来自第一光栅的光的空间相位调制; 第三光栅，其是具有第三光栅周期的幅度光栅，用于来自第二光栅的光的空间幅度调制; 以及用于检测来自第三光栅的光的光检测元件。 编码器检测各个光栅之间的相对位移。 提高了从光源到光检测元件的光传递函数，提高了利用光的效率。
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公开(公告)号：US20070187581A1
公开(公告)日：2007-08-16
申请号：US10598450
申请日：2004-08-05
申请人： Yoichi Ohmura , Toru Oka , Hajime Nakajima
发明人： Yoichi Ohmura , Toru Oka , Hajime Nakajima
CPC分类号： G01D5/38
摘要： An optical encoder includes an incoherent light source; a first grating, which is an amplitude grating having a first grating period, for spatial amplitude modulation of the incoherent light from the light source; a second grating, which is a phase grating having a second grating period, for spatial phase modulation of light from the first grating; a third grating, which is an amplitude grating having a third grating period, for spatial amplitude modulation of light from the second grating; and a light detecting element for detecting lights from the third grating. The encoder detects relative displacement between the respective gratings. The optical transfer function from the light source to the light detecting element is enhanced, and the efficiency in utilizing light is improved.
摘要翻译： 光学编码器包括非相干光源; 第一光栅，其是具有第一光栅周期的幅度光栅，用于来自光源的非相干光的空间幅度调制; 第二光栅，其是具有第二光栅周期的相位光栅，用于来自第一光栅的光的空间相位调制; 第三光栅，其是具有第三光栅周期的幅度光栅，用于来自第二光栅的光的空间幅度调制; 以及用于检测来自第三光栅的光的光检测元件。 编码器检测各个光栅之间的相对位移。 提高了从光源到光检测元件的光传递函数，提高了利用光的效率。
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公开(公告)号：US6054938A
公开(公告)日：2000-04-25
申请号：US21271
申请日：1998-02-10
CPC分类号： G01D5/34723
摘要： A detecting unit provided with an optical system is disposed away from a control unit formed by an electric circuit and an optical transmission/receiving means, and the detecting unit and the control unit are coupled through a transmission optical fiber. The control unit transmits to the detecting unit through the optical fiber a light wave which was subjected to the intensity modulation by a sinusoidal wave of a predetermined frequency. The transmitted light wave is branched into at least two branched optical paths within the detecting unit thereby to perform the phase modulation as to the respective light waves. The light waves passed through the respective branched optical paths are subjected to the phase modulation by the sinusoidal waves which differ in phase 1/4 period by 1/4 period from one another according to a position on a straight line or a rotation angle of a subject to be detected. Then, the light waves thus subjected to the intensity modulation are coupled to a single transmission optical fiber through the branched optical paths and transmitted to the control unit through the transmission optical fiber. In the control unit, the modulated light wave is received and subjected to the phase detection, thereby to calculate and output the position and the rotation angle in accordance with the phase modulation amount of the received light wave.
摘要翻译： 设置有光学系统的检测单元远离由电路和光学发送/接收装置形成的控制单元设置，并且检测单元和控制单元通过传输光纤耦合。 控制单元通过光纤向检测单元发送经过预定频率的正弦波进行强度调制的光波。 透射光波被分支到检测单元内的至少两个分支光路中，从而对相应的光波进行相位调制。 通过相应的分支光路的光波由相位相差+ E，fra 1/4 + EE周期+ E的正弦波进行相位调制，根据 待检测对象的直线或旋转角度的位置。 然后，经受强度调制的光波通过分支光路耦合到单个传输光纤，并通过传输光纤传输到控制单元。 在控制单元中，调制光波被接收并进行相位检测，从而根据接收的光波的相位调制量来计算和输出位置和旋转角度。
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公开(公告)号：US07405392B2
公开(公告)日：2008-07-29
申请号：US10599142
申请日：2005-03-29
申请人： Takeshi Musha , Toru Oka , Yoichi Ohmura
发明人： Takeshi Musha , Toru Oka , Yoichi Ohmura
IPC分类号： G01D5/34
CPC分类号： G01D5/30 , G01D5/34715 , G01D5/3473
摘要： An optical encoder includes: a rotary slit plate having a rotation angle detection track including an optical slit; a light source for applying light to the optical slit; light detecting elements for rotation angle detection and arranged at positions to which light emitted from the light source is applied to the optical slit, to detect the light emitted from the light source and passing through the optical slit; and light detecting elements for light amount monitoring arranged at locations on a circumference in corresponding relationship with positions to which light emitted from the light source is applied to the optical slit, to detect the light emitted from the light source and passing through the optical slit. The light detecting elements for light amount monitoring have an angular width that is an integer multiple of the angular interval of the light intensity distribution on surfaces of the light detecting elements for light amount monitoring.
摘要翻译： 光学编码器包括：旋转狭缝板，具有包括光学狭缝的旋转角度检测轨迹; 用于向光学狭缝施加光的光源; 用于旋转角度检测的光检测元件，并且布置在从光源发射的光被施加到光学狭缝的位置处，以检测从光源发射并穿过光学狭缝的光; 以及光量监测用光检测元件，其配置在与从光源射出的光对应的位置对应的圆周上的位置处，以检测从光源发出的光并通过光学狭缝。 用于光量监视的光检测元件的角度宽度是用于光量监视的光检测元件的表面上的光强度分布的角度间隔的整数倍。
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