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1. 发明授权

US5404220A Measuring method and measuring apparatus for determining the relative displacement of a diffraction grating with respect to a plurality of beams 失效
$Measuring method and measuring apparatus for determining the relative displacement of a diffraction grating with respect to a plurality of beams$
标题翻译：用于确定衍射光栅相对于多个光束的相对位移的测量方法和测量装置
公开(公告)号：US5404220A
公开(公告)日：1995-04-04
申请号：US955979
申请日：1992-10-02
申请人： Seiji Takeuchi , Tetsuharu Nishimura , Minoru Yoshii , Hiroyasu Nose , Koh Ishizuka
发明人： Seiji Takeuchi , Tetsuharu Nishimura , Minoru Yoshii , Hiroyasu Nose , Koh Ishizuka
IPC分类号： G01B9/02 , G01D5/38 , G03F9/00
CPC分类号： G01D5/38 , G03F9/7049
摘要： A method and an apparatus for measuring a very small displacement of an object. The first and second beat signals are produced by light beams of different frequencies diffracted by a diffraction grating. The phase difference between the first and second beat signals is detected, thereby measuring the relative displacement of the diffraction grating.
摘要翻译：一种用于测量物体的非常小位移的方法和装置。第一和第二拍频信号由衍射光栅衍射的不同频率的光束产生。检测第一和第二拍动信号之间的相位差，从而测量衍射光栅的相对位移。

2. 发明授权

US5067089A Device having signal interpolation circuit and displacement measuring apparatus comprising the device 失效
标题翻译：具有信号插值电路的装置和包括该装置的位移测量装置
公开(公告)号：US5067089A
公开(公告)日：1991-11-19
申请号：US419705
申请日：1989-10-11
申请人： Satoshi Ishii , Masaaki Tsukiji , Tetsuharu Nishimura , Koh Ishizuka
发明人： Satoshi Ishii , Masaaki Tsukiji , Tetsuharu Nishimura , Koh Ishizuka
IPC分类号： H03K5/00 , G01D5/244 , H03M1/64
CPC分类号： G01D5/24404 , H03M1/645
摘要： A device comprises output device for receiving signals having predetermined phases and outputting first and second signals having different phase angles and amplitudes, conversion device for converting the first signal into a first binary signal and the second signal into a second binary signal, the conversion device being arranged so that widths of the first and second binary signals are substantially equal to each other regardless of a difference in amplitude of the first and second signals, and generating device for generating first and second pulses according to phase angles on the basis of the first and second binary signals.
摘要翻译：一种设备包括用于接收具有预定相位的信号的输出装置，并且输出具有不同相位角和幅度的第一和第二信号，用于将第一信号转换为第一二进制信号的转换装置和第二信号转换为第二二进制信号，转换装置布置成使得第一和第二二进制信号的宽度彼此基本相等，而与第一和第二信号的幅度差无关，以及用于根据第一和第二信号的相位角产生第一和第二脉冲的产生装置，第二个二进制信号。

3. 发明授权

US5000542A Optical type encoder 失效
标题翻译：光学型编码器
公开(公告)号：US5000542A
公开(公告)日：1991-03-19
申请号：US346701
申请日：1989-05-03
申请人： Tetsuharu Nishimura , Masaaki Tsukiji , Satoshi Ishii , Koh Ishizuka , Yoichi Kubota
发明人： Tetsuharu Nishimura , Masaaki Tsukiji , Satoshi Ishii , Koh Ishizuka , Yoichi Kubota
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： In an optical type encoder for projecting a light beam onto an optical type scale having a diffraction grating formed thereon, forming an interferenced light by the use of a diffracted light from the scale, and photoelectrically converting the interferenced light to thereby measure the displacement of the scale, first and second light beams are caused to enter substantially the same position on the scale from different first and second directions, first and second diffracted light beams emerging from the scale by the first and second light beams being diffracted by the scale are directed to the aforementioned position by a reflecting device, the diffracted light beams emerging in the first and second directions by the first and second diffracted light beams being diffracted by the scale are superposed one upon the other to thereby form an interferenced light, and light components created by the first and second light beams being regularly reflected at the aforementioned position are not included in the interferenced light.
摘要翻译：在用于将光束投射到其上形成有衍射光栅的光学刻度尺的光学型编码器中，通过使用来自刻度的衍射光形成介入光，并对该干涉光进行光电转换，从而测量使第一和第二光束在不同的第一和第二方向上在刻度上进入基本上相同的位置，第一和第二光束通过刻度被衍射的第一和第二衍射光束被引导到通过反射装置的上述位置，由第一和第二方向由第一和第二衍射光束以标尺衍射的第一和第二方向的衍射光束彼此重叠，从而形成介入光，并且由在上述位置规则地反射的第一和第二光束为No t包含在干涉光中。

4. 发明授权

US4933673A Encoder 失效
标题翻译：编码器
公开(公告)号：US4933673A
公开(公告)日：1990-06-12
申请号：US171435
申请日：1988-03-21
申请人： Koh Ishizuka , Tetsuharu Nishimura , Masaaki Tsukiji , Satoshi Ishii
发明人： Koh Ishizuka , Tetsuharu Nishimura , Masaaki Tsukiji , Satoshi Ishii
IPC分类号： G01D5/249 , G01D5/36 , G01D5/38 , H03M1/14 , H03M1/24 , H03M1/28 , H03M1/30
CPC分类号： G01D5/38 , H03M1/143 , H03M1/285 , H03M1/30
摘要： An encoder for detecting the state of movement of a scale having a plurality of tracks consisting of arranged predetermined codes comprises first detecting device for reading the codes of the plurality of tracks and detecting data comprising a row of the codes, and second detecting device for detecting the state of movement of the codes of a particular track plurality of tracks to obtain more detailed data. The state of movement of the scale is detected on the basis of the signals from the first and second detecting devices.
摘要翻译：一种用于检测具有由布置的预定代码组成的多个轨道的标尺的移动状态的编码器，包括用于读取多个轨道的代码和检测包括代码行的数据的第一检测装置和用于检测的第二检测装置特定轨道多个轨道的代码的移动状态以获得更详细的数据。基于来自第一和第二检测装置的信号检测标尺的移动状态。

5. 发明授权

US4912320A Optical type encoder including diffraction grating for producing interference fringes that are processed to measure displacement 失效
$Optical type encoder including diffraction grating for producing interference fringes that are processed to measure displacement$
标题翻译：光学型编码器包括用于产生被处理以测量位移的干涉条纹的衍射光栅
公开(公告)号：US4912320A
公开(公告)日：1990-03-27
申请号：US321155
申请日：1989-03-09
申请人： Satoshi Ishii , Tetsuharu Nishimura , Koh Ishizuka , Masaaki Tsukiji
发明人： Satoshi Ishii , Tetsuharu Nishimura , Koh Ishizuka , Masaaki Tsukiji
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： An optical type encoder comprises a light source for supplying a light beam for illuminating a diffraction grating formed on a movable scale, photoelectric converting means for photoelectrically converting interference fringes formed by causing a plurality of diffracted lights created by the diffraction grating to interfere with one another to measure the displacement of the movable scale and outputting a predetermined signal, detecting means for receiving a predetermined diffracted light created by the diffraction grating and detecting any fluctuation of the intensity thereof, and control means for modulating the intensity of the light beam illuminating the diffraction grating, on the basis of a signal from the detecting means, so that the amplitude of the output signal from the photoelectric converting means may become substantially constant.
摘要翻译：一种光学型编码器包括用于提供用于照射形成在可移动刻度上的衍射光栅的光束的光源，用于光电转换由衍射光栅产生的多个衍射光形成的干涉条纹相互干扰的光电转换装置测量可移动刻度的位移并输出预定信号;检测装置，用于接收由衍射光栅产生的预定衍射光并检测其强度的波动;以及控制装置，用于调制照射衍射的光束的强度基于来自检测装置的信号，使得来自光电转换装置的输出信号的幅度变得基本恒定。

6. 发明授权

US5159192A Encoder and scanning system using a scale having a non-uniform pitch 失效
标题翻译：使用具有不均匀间距的刻度的编码器和扫描系统
公开(公告)号：US5159192A
公开(公告)日：1992-10-27
申请号：US641891
申请日：1991-01-16
申请人： Tetsuharu Nishimura , Koh Ishizuka
发明人： Tetsuharu Nishimura , Koh Ishizuka
IPC分类号： G01D5/38 , G01D5/347 , G02B5/08 , G02B26/10 , H03M1/30
CPC分类号： H03M1/30 , G01D5/34715
摘要： A rotary encoder and a scanning system using the same for detecting rotation of a galvano scanner which comprises a rotary scale coupled to a rotating driver, a scale with slits formed at a non-uniform pitch circumferentially on the rotary scale within a limited rotation angle and detection means for detecting a rotation status by reading the slits.
摘要翻译：一种旋转编码器和使用该旋转编码器的扫描系统，用于检测电动扫描器的旋转，其包括耦合到旋转驱动器的旋转刻度，具有在受限旋转角度内在旋转刻度上沿圆周非均匀间距形成的狭缝的刻度，用于通过读取狭缝来检测旋转状态的检测装置。

7. 发明授权

US5146085A Encoder with high resolving power and accuracy 失效
标题翻译：具有高分辨力和精度的编码器
公开(公告)号：US5146085A
公开(公告)日：1992-09-08
申请号：US522051
申请日：1990-05-11
申请人： Koh Ishizuka , Tetsuharu Nishimura
发明人： Koh Ishizuka , Tetsuharu Nishimura
IPC分类号： G01D5/38 , G11B19/12
CPC分类号： G01D5/38 , G11B19/12
摘要： A light beam is incident on a first position on a scale at such an angle that diffracted lights substantially coincide with an incident optical path, and two diffracted lights are directed along a substantially common optical path and are incident on a second position symmetrical with the first position. An interference light formed by rediffracted lights reflected from the second position is detected to thereby detect the displaced state of the scale.

8. 发明授权

US5066130A Displacement measuring apparatus 失效
标题翻译：位移测量仪
公开(公告)号：US5066130A
公开(公告)日：1991-11-19
申请号：US347397
申请日：1989-05-04
申请人： Masaaki Tsukiji , Tetsuharu Nishimura , Koh Ishizuka , Satoshi Ishii , Yoichi Kubota
发明人： Masaaki Tsukiji , Tetsuharu Nishimura , Koh Ishizuka , Satoshi Ishii , Yoichi Kubota
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： A displacement measuring apparatus comprises a scale relatively displaced to an irradiating beam, a reading head to read the scale by the irradiating beam, and control device to control the apparatus for avoiding substantially the leakage of the irradiating beam out of the apparatus in response to the positional error of the scale and the irradiating beam.
摘要翻译：位移测量装置包括与照射光束相对位移的标尺，用于通过照射光束读取标尺的读取头以及控制装置，用于控制装置，以便基本上避免照射光束从设备中泄漏出来，以响应于刻度和照射光束的位置误差。

9. 发明授权

US5051579A Optical scale encoder with light intensity alarm 失效
标题翻译：具有光强度报警的光标编码器
公开(公告)号：US5051579A
公开(公告)日：1991-09-24
申请号：US532108
申请日：1990-06-01
申请人： Masaaki Tsukiji , Tetsuharu Nishimura , Koh Ishizuka , Satoshi Ishii
发明人： Masaaki Tsukiji , Tetsuharu Nishimura , Koh Ishizuka , Satoshi Ishii
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： An encoder for measuring movement of an optical scale by photoelectrically converting light from the optical scale obtained by applying light from a light source to the optical scale, by means of light receiving element, includes detector for detecting a variation in intensity of the light received by the light receiving element and a comparator for comparing a signal from the detector with a predetermined reference signal. Consequently, a predetermined alarm signal is generated on the basis of the result of comparison obtained from the comparator. A measuring system for detecting a moving condition of an object, includes an optical scale connected to the object; a light source for applying light to the optical scale; a first detector for receiving light from the optical scale and for detecting the moving condition of the object; a second detector for detecting a variation in intensity of the light received by the first detector; and a signal forming device for forming a predetermined alarm signal on the basis of an output signal from the second detector.
摘要翻译：一种编码器，用于通过光电转换由光源将光从光源施加到光刻尺上的光通过光接收元件测量光标的移动，包括用于检测由光接收元件接收的光的强度变化的检测器光接收元件和用于将来自检测器的信号与预定参考信号进行比较的比较器。因此，基于从比较器获得的比较结果来生成预定的报警信号。用于检测物体的移动状态的测量系统包括连接到物体的光学刻度; 用于将光施加到光学刻度的光源; 第一检测器，用于接收来自光刻尺的光并检测物体的移动状态; 第二检测器，用于检测由第一检测器接收的光的强度变化; 以及信号形成装置，用于根据来自第二检测器的输出信号形成预定报警信号。

10. 发明授权

US5038491A Scale for use for measurement of the displacement of an object to be examined, and displacement measuring apparatus 失效
标题翻译：用于测量待检物体的位移的刻度，以及位移测量装置
公开(公告)号：US5038491A
公开(公告)日：1991-08-13
申请号：US369862
申请日：1989-06-22
申请人： Masaaki Tsukiji , Tetsuharu Nishimura , Satoshi Ishii , Koh Ishizuka
发明人： Masaaki Tsukiji , Tetsuharu Nishimura , Satoshi Ishii , Koh Ishizuka
IPC分类号： G01D5/36 , G01D5/244 , G01D5/347
CPC分类号： G01D5/24442 , G01D5/24476 , G01D5/347
摘要： A scale, for measuring the displacement of an object to be examined, has a division and a mark for alignment of the division, and a displacement measuring apparatus, for measuring the displacement of a scale, has a device for reading the division of the scale and a detector for detecting the positional error of the division relative to the direction of the displacement.
摘要翻译：用于测量待检测物体的位移的刻度具有划分的划分和标记，并且用于测量刻度的位移的位移测量装置具有用于读取刻度的分割的装置以及用于检测相对于位移方向的分割的位置误差的检测器。

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