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    Optical encoder
    2.
    发明授权
    Optical encoder 失效
    光学编码器

    公开(公告)号：US6054938A

    公开(公告)日：2000-04-25

    申请号：US21271

    申请日：1998-02-10

    申请人： Hajime Nakajima ,  Masahiro Shikai ,  Toru Oka ,  Toshiro Nakashima ,  Kazuo Takashima

    发明人： Hajime Nakajima ,  Masahiro Shikai ,  Toru Oka ,  Toshiro Nakashima ,  Kazuo Takashima

    IPC分类号： G01D5/36 ,  G01D5/347 ,  H03M1/00 ,  G01D5/34

    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。

    Irregular pattern input device comprising an optical fiber bundle
    3.
    发明授权
    Irregular pattern input device comprising an optical fiber bundle 失效
    不规则图案输入装置，包括光纤束

    公开(公告)号：US5426296A

    公开(公告)日：1995-06-20

    申请号：US190786

    申请日：1994-02-01

    申请人： Masahiro Shikai ,  Hajime Nakajima ,  Kazuo Takashima

    发明人： Masahiro Shikai ,  Hajime Nakajima ,  Kazuo Takashima

    IPC分类号： G02B6/04 ,  G02B27/00 ,  G06K9/00 ,  G07C9/00 ,  G02B5/00 ,  G06K5/00

    CPC分类号： G06K9/00046 ,  G07C9/00158

    摘要： An irregular pattern input device includes an optical fiber bundle in which an entrance surface and an exit surface are respectively formed at both ends thereof. Lighting means emits irradiation light so as to provide a light pattern according to a convex portion of a subject in contact with the entrance surface, and according to a concave portion of the subject in no contact with the entrance surface. In this case, an angle of incidence of the irradiation light is set to be larger than a critical angle on an interface between a core portion of each optical fiber of the optical fiber bundle and the air. It is thereby possible to provide total reflection on the entrance surface in no contact with the concave portion of the subject, and non-total reflection on the entrance surface in contact with the convex portion of the subject, resulting in reflected light having a light pattern according to an irregular pattern. The resultant light pattern is inputted into photoelectric transforming means through the exit surface, and is transformed into electric information by the photoelectric transforming means.

    摘要翻译： 不规则图案输入装置包括在其两端分别形成有入射面和出射面的光纤束。 照明装置发射照射光，以根据与入射面接触的被检体的凸部提供光图案，并且根据与入射面不接触的被检体的凹部。 在这种情况下，照射光的入射角被设定为大于光纤束的各光纤的芯部与空气的界面上的临界角。 由此，能够在与被检体的凹部不接触的入射面上提供全反射，并且与入射面的与被检体的凸部接触的非全反射，从而产生具有光图案的反射光 根据不规则的格局。 所得到的光图案通过出射面输入到光电变换装置中，并通过光电变换装置转换成电信息。

    Sensor head
    4.
    发明授权
    Sensor head 失效
    传感器头

    公开(公告)号：US06846116B2

    公开(公告)日：2005-01-25

    申请号：US10182628

    申请日：2000-12-11

    申请人： Toru Oka ,  Hajime Nakajima ,  Masahiro Shikai ,  Akihide Shiratsuki ,  Jurgen Mohr ,  Ulrike Wallrabe ,  Uwe Hollenbach

    发明人： Toru Oka ,  Hajime Nakajima ,  Masahiro Shikai ,  Akihide Shiratsuki ,  Jurgen Mohr ,  Ulrike Wallrabe ,  Uwe Hollenbach

    IPC分类号： G01D5/26 ,  G01S7/481 ,  G01S17/46 ,  G02B6/42

    CPC分类号： G01S17/48 ,  G01D5/26 ,  G01S7/4813

    摘要： A sensor head includes a first substrate provided with a light emitting element and a light detecting element, a one-piece optical structure body on a second substrate, the optical structure body having optical elements for converging incident light in a direction parallel to a surface of the second substrate and for converging an outgoing beam from the light emitting element and a light beam reflected by an object in the direction parallel to the surface of the second substrate, and lenses for converging incident light in a direction perpendicular to the surface of the second substrate and for converging the outgoing beam from the light emitting element and the light beam reflected by the object in the direction perpendicular to the surface of the second substrate, respectively.

    摘要翻译： 传感器头包括设置有发光元件和光检测元件的第一基板，在第二基板上的一体式光学结构体，所述光学结构体具有用于使入射光沿平行于 所述第二基板用于会聚来自所述发光元件的输出光束和在与所述第二基板的表面平行的方向上由物体反射的光束，以及用于在与所述第二基板的表面垂直的方向上会聚入射光的透镜 并且用于分别使来自发光元件的输出光束和由物体反射的光束在垂直于第二基板的表面的方向上会聚。

    Identity verification apparatus and fingerprint image pickup method
    5.
    发明授权
    Identity verification apparatus and fingerprint image pickup method 失效
    身份验证装置和指纹图像拾取方法

    公开(公告)号：US07577279B2

    公开(公告)日：2009-08-18

    申请号：US10793747

    申请日：2004-03-08

    申请人： Emiko Sano ,  Akihide Shiratsuki ,  Masahiro Shikai ,  Hajime Nakajima

    发明人： Emiko Sano ,  Akihide Shiratsuki ,  Masahiro Shikai ,  Hajime Nakajima

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06K9/00033 ,  G06K2009/0006 ,  G06K2009/00932

    摘要： An identity verification apparatus includes a light source for applying light that can pass through an object to be detected and having a fingerprints to the object to be detected, an image pickup unit for picking up light emitted from the light source and passing through projections of the fingerprint and light emitted from the light source and passing through depressions of the fingerprint, and for generating a fingerprint image including dark portions corresponding to the projections and bright portions corresponding to the depressions, and a signal processing unit for image processing the fingerprint image generated by the image pickup unit to generate fingerprint information, and for verifying an identity based on the fingerprint information.

    摘要翻译： 身份验证装置包括：用于将能够通过待检测物体的光具有用于将待检测物体具有指纹的光源的光源，摄像单元，用于拾取从光源发射的光并通过 从光源发射并通过指纹凹陷的指纹和光，并且用于产生包括对应于与凹陷相对应的突出部分和亮部分的暗部分的指纹图像;以及信号处理单元，用于对由 图像拾取单元，用于生成指纹信息，以及用于基于指纹信息验证身份。

    Annular photodiode for use in an optical rotary encoder
    7.
    发明授权
    Annular photodiode for use in an optical rotary encoder 失效
    用于光学旋转编码器的环形光电二极管

    公开(公告)号：US5428217A

    公开(公告)日：1995-06-27

    申请号：US130874

    申请日：1993-10-04

    申请人： Hajime Nakajima ,  Masahiro Shikai

    发明人： Hajime Nakajima ,  Masahiro Shikai

    IPC分类号： G01B11/26 ,  G01D5/30 ,  G01D5/38 ,  H01J40/14

    CPC分类号： G01D5/38

    摘要： The present invention relates to an optical rotary encoder for detecting a position optically. In the optical rotary encoder of the invention, a light beam reflected by a half mirror enters a deflector, whereby it is reflected while being deflected in a certain direction. The reflected light beam again enters the half mirror. Transmitted light from the half mirror enters a position detector, in which a light spot is formed on an annular photodiode. The path of the reflected light from the deflector forms a cone having a vertical angle which is twice the angle of deflection of the deflector. The position detector is disposed perpendicularly to the optical axis of the reflected light in the case of the deflection angle being 0.degree. and with the center of the annular photodiode made coincident with the said optical axis. A suitable distance between the deflector and the photodiode is selected so that a light spot is radiated onto the photodiode. The position of the light spot formed on the annular photodiode is in a corresponding relation to a rotational angle of a rotating shaft. The position detector detects the position of the light spot to detect such rotational angle.

    摘要翻译： 光学旋转编码器技术领域本发明涉及用于光学地检测位置的光学旋转编码器。 在本发明的光学旋转编码器中，由半反射镜反射的光束进入偏转器，由此在沿某一方向偏转的同时被反射。 反射光束再次进入半反射镜。 来自半反射镜的透射光进入位置检测器，其中在环形光电二极管上形成光斑。 来自偏转器的反射光的路径形成具有两倍偏转器偏转角的垂直角的锥体。 在偏转角为0°的情况下，位置检测器垂直于反射光的光轴设置，并且环形光电二极管的中心与所述光轴重合。 选择偏转器和光电二极管之间的适当距离，使得光斑辐射到光电二极管上。 形成在环形光电二极管上的光点的位置与旋转轴的旋转角度成对应关系。 位置检测器检测光点的位置以检测这种旋转角度。

    Pattern detector for capturing images with reduced distortion
    8.
    发明授权
    Pattern detector for capturing images with reduced distortion 失效
    用于捕获具有减少失真的图像的图案检测器

    公开(公告)号：US06657185B2

    公开(公告)日：2003-12-02

    申请号：US09725184

    申请日：2000-11-29

    申请人： Akihide Shiratsuki ,  Masahiro Shikai ,  Hajime Nakajima

    发明人： Akihide Shiratsuki ,  Masahiro Shikai ,  Hajime Nakajima

    IPC分类号： G02B500

    CPC分类号： G06K7/10683

    摘要： An irregular pattern detector includes a first optical system, a transparent light guide body and a second optical system. The first optical system has a light source. The transparent light guide body has an incident face receiving incident light from the light source of the first optical system, a detection face facing the incident face for placing of a subject having an irregular pattern, a curved surface reflecting scattered light from the detection face, an optical absorbing face facing the curved surface and having an opening outputting light reflected from the curved surface. The second optical system, such as an imaging lens, guides the light from the opening of the optical absorbing face of the transparent light guide body to a camera device. This irregular pattern detector can be scaled down, and can produced precise images without any deformation.

    摘要翻译： 不规则图案检测器包括第一光学系统，透明导光体和第二光学系统。 第一光学系统具有光源。 透明导光体具有从第一光学系统的光源接收入射光的入射面，面对入射面的检测面，用于放置具有不规则图案的被摄体，反射来自检测面的散射光的曲面， 面向曲面的光吸收面，具有从曲面反射的光的开口。 诸如成像透镜的第二光学系统将来自透明导光体的光吸收面的开口的光引导到相机装置。 这种不规则图案检测器可以缩小，并且可以产生精确的图像而没有任何变形。

    Optical encoder having a single signal track and an optical detecting part with sine and cosine signals
    9.
    发明授权
    Optical encoder having a single signal track and an optical detecting part with sine and cosine signals 有权
    具有单个信号轨道的光学编码器和具有正弦和余弦信号的光学检测部分

    公开(公告)号：US08415610B2

    公开(公告)日：2013-04-09

    申请号：US12990508

    申请日：2009-06-03

    申请人： Hajime Nakajima ,  Takuya Noguchi ,  Takeshi Musha ,  Youichi Omura ,  Toshiro Nakashima ,  Tatsuya Nagatani ,  Takashi Iwamoto

    发明人： Hajime Nakajima ,  Takuya Noguchi ,  Takeshi Musha ,  Youichi Omura ,  Toshiro Nakashima ,  Tatsuya Nagatani ,  Takashi Iwamoto

    IPC分类号： G01D5/34

    CPC分类号： G01D5/347 ,  G01D5/3473

    摘要： Present invention provides an optical encoder capable of improving the precision of an interpolation angle in a single signal track, in an encoder of sine-wave angle interpolation type. The optical encoder includes a waveform, in which a phase-modulated wave is superimposed in a predetermined period over a sine-wave of a fundamental period, as a signal track (103), and an optical detector (104) for extracting the sine signal and the cosine signal of the phase-modulated wave. An operation unit (106) operates electric angles individually from the output signals of a first optical detector pair and a second optical detector pair belonging to the optical detector, and determines the sum and difference of the electric angles, thereby acquiring the electric angle and the phase-modulated wave of the fundamental period.

    摘要翻译： 本发明提供了一种在正弦波角插值类型的编码器中能够提高单个信号轨道内插角的精度的光学编码器。 光学编码器包括波形，其中在基本周期的正弦波上以预定周期叠加相位调制波作为信号轨道（103），以及用于提取正弦信号的光学检测器（104） 和相位调制波的余弦信号。 操作单元（106）从属于光检测器的第一光检测器对和第二光检测器对的输出信号分别操作电角度，并且确定电角度的和差，从而获得电角度和 基波周期的相位调制波。

    Photoelectric rotary encoder
    10.
    发明授权
    Photoelectric rotary encoder 有权
    光电旋转编码器

    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。