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    • 4. 发明授权
    • Optical encoder
    • 光学编码器
    • US6054938A
    • 2000-04-25
    • US21271
    • 1998-02-10
    • Hajime NakajimaMasahiro ShikaiToru OkaToshiro NakashimaKazuo Takashima
    • Hajime NakajimaMasahiro ShikaiToru OkaToshiro NakashimaKazuo Takashima
    • G01D5/36G01D5/347H03M1/00G01D5/34
    • G01D5/34723
    • 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.
    • 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。
    • 5. 发明授权
    • Irregular pattern input device comprising an optical fiber bundle
    • 不规则图案输入装置,包括光纤束
    • US5426296A
    • 1995-06-20
    • US190786
    • 1994-02-01
    • Masahiro ShikaiHajime NakajimaKazuo Takashima
    • Masahiro ShikaiHajime NakajimaKazuo Takashima
    • G02B6/04G02B27/00G06K9/00G07C9/00G02B5/00G06K5/00
    • G06K9/00046G07C9/00158
    • 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.
    • 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。
    • 6. 发明申请
    • RADIANT-TEMPERATURE MEASUREMENT DEVICE, LIGHT-SOURCE TEMPERATURE CONTROL DEVICE, IMAGE PROJECTION APPARATUS AND RADIANT-TEMPERATURE MEASUREMENT METHOD
    • 辐射温度测量装置,光源温度控制装置,图像投影装置和辐射温度测量方法
    • US20080062404A1
    • 2008-03-13
    • US11754493
    • 2007-05-29
    • Hiroyuki KawanoTatsuki OkamotoToshirou NakashimaKazuo Takashima
    • Hiroyuki KawanoTatsuki OkamotoToshirou NakashimaKazuo Takashima
    • G01N21/00
    • G01J5/602G01J5/08G01J5/0846G01J5/0859G01J2001/4238G01J2001/4247G01J2005/0048G01J2005/0077G03B21/16G03B21/2026G03B21/2086G03B27/54
    • In a two-color (ratio) or dual-wavelength radiant-temperature measurement, when a bright stray-light source in which its light intensity varies depending on time exists near an object to be measured, by removing an influence caused by the stray light, temperature of the measuring object is measured.By including a main detection unit 51 for measuring, with respect to light from the temperature-measuring object onto which the stray light is added, variation in light intensity versus time in two wavelength bands, and a subordinate detection unit 52 for measuring variation in stray-light intensity versus time only, a temperature calculation unit 70 is provided so that, the varied amounts are extracted, corresponding to superimposed pulses added onto a light-source's drive current, from measured results of the main detection unit 51 and the subordinate detection unit 52; an influential component caused by the stray light is estimated based on a ratio between the varied amounts of both the measured results corresponding to the superimposed pulses; and then, from a measured value in which the influential component caused by the stray light is removed from the measured light intensity values in the two wavelength bands, the temperature of the temperature-measuring object is calculated based on the dual-wavelength radiant-temperature measurement method.
    • 在双色(比例)或双波长辐射温度测量中,当其光强度随时间变化的明亮杂散光源存在于待测物体附近时,通过消除由杂散光引起的影响 ,测量测量对象的温度。 通过包括主检测单元51,用于相对于来自附加有杂散光的测温对象的光,测量两个波长带中的光强度对时间的变化,以及用于测量杂散变化的从属检测单元52 仅强度对时间的影响,提供温度计算单元70,根据主检测单元51和从属检测单元的测量结果,提取与添加到光源驱动电流上的叠加脉冲相对应的变化量 52; 基于与叠加的脉冲对应的两个测量结果的变化量之间的比率来估计由杂散光引起的影响分量; 然后,从从两个波长带的测定光强度值中除去由杂散光引起的影响成分的测定值,基于双波长辐射温度来计算温度测量对象的温度 测量方法。
    • 8. 发明授权
    • Sliding door system with optical detector for safe door opening and closing
    • 具有光学检测器的滑动门系统,用于安全门打开和关闭
    • US06962239B2
    • 2005-11-08
    • US10430223
    • 2003-05-07
    • Masahiro ShikaiToshiro NakashimaKazuo Takashima
    • Masahiro ShikaiToshiro NakashimaKazuo Takashima
    • B66B13/28B66B13/26B66B13/14
    • B66B13/26
    • A sliding door system has a pair of horizontally opposed vertical surfaces defining therebetween an opening, an upper horizontal surface connecting uppermost ends of the vertical surfaces, a lower horizontal surface connecting lowermost ends of the vertical surfaces, and a door moving horizontally to open and close the opening. The sliding door system also includes a first optical device having a light emitter for emitting light, a second optical device having a light detector for detecting the light, and a light reflector for reflecting the light emitted from the light emitter to the light receiver. The light reflector is positioned in at least one of the horizontally opposed vertical surfaces. The first and second optical devices are positioned in the upper horizontal surface.
    • 滑门系统具有一对水平相对的垂直表面,在其间限定开口,连接垂直表面的最上端的上水平表面,连接垂直表面的最下端的下水平表面和水平移动以打开和关闭的门 开幕。 滑动门系统还包括具有用于发光的光发射器的第一光学装置,具有用于检测光的光检测器的第二光学装置和用于将从发光体发射的光反射到光接收器的光反射器。 光反射器位于水平相对的垂直表面中的至少一个中。 第一和第二光学装置位于上部水平表面中。