公开(公告)号：WO1994011888A1

公开(公告)日：1994-05-26

申请号：PCT/JP1993001643

申请日：1993-11-10

Applicant: COPAL COMPANY LIMITED ,  TONOGAI, Yoshihide ,  TAKAGI, Masaaki

Inventor： COPAL COMPANY LIMITED

IPC: H01C10/30

CPC classification number: H01C10/32 ,  G01B7/30 ,  G01D5/165 ,  G01D5/2412

Abstract: This invention aims at providing a potentiometer capable of enlarging a range of operating temperature. A resistance member shaped into an open ring with its opposite ends out of contact is put on the surface of a base, and a shaft positioned at the center of the resistance member is rotatably supported by a bearing. A bent electrode arm is fitted to the shaft and is connected to an output terminal through the shaft which is a conductor member, or through connection means. A movable electrode is integrally formed with the end of the electrode arm in such a way that it is opposed to the resistance member with a gap to form a capacitor between the movable electrode and the resistance member. In the structure described above, when an A.C. current flows through the resistance member, a capacitor is formed between the movable electrode and the resistance member, and an attenuated voltage appears at the movable electrode. The voltage at the movable electrode increases or decreases by displacement of the movable electrode with the revolution of the shaft, and when this voltage is taken out as a resistance voltage division ratio from the output terminal, a rotating angle of the rotary shaft and its displacement quantity can be detected.

Abstract translation: 本发明旨在提供一种能够扩大工作温度范围的电位器。 将形成为开放环的电阻构件的相对端部不接触地放置在基座的表面上，并且位于电阻构件中心的轴由轴承可旋转地支撑。 弯曲的电极臂装配到轴上，并通过作为导体构件的轴或通过连接装置连接到输出端子。 可动电极与电极臂的端部一体地形成为与电阻部件相对的间隙，以在可动电极和电阻部件之间形成电容器。 在上述结构中，当交流电流流过电阻部件时，在可动电极与电阻部件之间形成电容器，在可动电极上出现衰减电压。 可移动电极上的电压通过可转动电极与轴的转动的位移而增加或减少，并且当该电压从输出端子作为电阻分压比取出时，旋转轴的旋转角度及其位移 数量可以检测。

公开(公告)号：WO1995006889A1

公开(公告)日：1995-03-09

申请号：PCT/JP1993001238

申请日：1993-09-01

Applicant: COPAL COMPANY LIMITED ,  YOSHIKAWA, Yukio ,  NAKAMURA, Shigekazu

Inventor： COPAL COMPANY LIMITED

IPC: G02B06/00

CPC classification number: G02B6/0036 ,  G02B6/0061 ,  G02B6/0065 ,  G02F1/133615

Abstract: A surface light emitting device emits light from a light emitting surface, the light being from a light source arranged on one side of the light emitting surface. On the bottom which faces the light emitting surface, a transparent light-guiding board is arranged. The board has small reflecting projections thereon. The density of the reflecting projections increases gradually from the light source. The light from the light source is reflected by the reflecting projections and emitted from the light emitting surface. Since the light from the light source is reflected toward the light emitting surface side in accordance with the density of the reflecting projections, the light is uniformly emitted from over the entire emitting surface. The reflecting projections are staggered in the direction where light is emitted from the light source, making it easy for the light to strike the staggered reflecting projections. The surface of each projection, extending from the top to the board, is preferably a curved one, or the shape of each one is preferably a cone.

Abstract translation: 表面发光器件从发光表面发射光，所述光来自布置在发光表面一侧的光源。 在面向发光面的底部配置透明导光板。 板上有小的反射投影。 反射突起的密度从光源逐渐增加。 来自光源的光被反射突起反射并从发光表面发射。 由于来自光源的光根据反射突起的密度而被反射到发光面侧，所以光从整个发射面均匀地发射。 反射突起在从光源射出光的方向上交错，使光易于撞击交错反射突起。 每个突起的表面从顶部延伸到板，优选是弯曲的，或者每个突起的形状优选为锥形。

公开(公告)号：WO1993021499A1

公开(公告)日：1993-10-28

申请号：PCT/JP1993000506

申请日：1993-04-20

Applicant: COPAL COMPANY LIMITED ,  TAKAGI, Masaaki ,  FUKUDA, Takumi

Inventor： COPAL COMPANY LIMITED

IPC: G01D05/249

CPC classification number: G01D5/34792 ,  G01D5/2497 ,  H03M1/26

Abstract: An absolute encoder comprises a moving member in which track groups (T2 and T1) consisting of a plurality of slit patterns bit-coded in accordance with digital code representing an absolute address such as a binary-coded quaternary code are parallelly arranged in a form from higher bits to lower bits; a light source for illuminating the member; photodetecting elements (1 and 2) which output detection signals (A0 to A3 ) for each track by receiving the illuminated light through the slit patterns; and processing means for processing the detected signals to generate bit reproducing signals (P0 to P3) and read the absolute addresses of the moving member by decoding. This processing means is provided with operating means (3 to 20) for generating the high order bit reproducing signals (P2 and P3) which are synchronized with the rising or falling of the low order bit reproducing signal (P0) by operating the low order detection signals (A0 to A0 ) obtained from the lower bit track (T1) and the high order detection signals (A2 to A3 ) obtained from the higher order bit track (T2). If the number of the tracks is increased, it is necessary to provide an arrangement in which the light which illuminates the lower order bit track is received through a magnifying optical system and at the same time, the light which illuminates the track on the high order bit side is received directly.

Abstract translation: 绝对编码器包括移动构件，其中由多个狭缝图案组成的轨道组（T2和T1）由根据表示诸如二进制编码的四进制代码之类的绝对地址的数字代码而被位编码的多个狭缝模式并行地以 较高位到较低位; 用于照亮所述构件的光源; 通过接收经过狭缝图案的照明光，对每个轨道输出检测信号（A0 +至A3 < - ）的光检测元件（1和2） 以及处理装置，用于处理所检测的信号以产生位再现信号（P0至P3），并通过解码读取移动部件的绝对地址。 该处理装置设置有用于通过操作低阶检测来产生与低位位再现信号（P0）的上升或下降同步的高位位再现信号（P2和P3）的操作装置（3至20） 从较低位轨迹（T1）获得的信号（A0 +至A0 < - ）和从高位位轨迹（T2）获得的高阶检测信号（A2 <+>至A3 < - >）。 如果轨道的数量增加，则需要提供通过放大光学系统接收照亮低阶位轨道的光并且同时以高次序照亮轨道的光的布置 位边直接接收。

公开(公告)号：WO1991006097A1

公开(公告)日：1991-05-02

申请号：PCT/JP1990001325

申请日：1990-10-15

Applicant: COPAL COMPANY LIMITED ,  FUJITSU LIMITED ,  HOSOBATA, Nobuhiko ,  YOSHIKAWA, Yukio ,  TAKAGI, Masaaki

Inventor： COPAL COMPANY LIMITED ,  FUJITSU LIMITED

IPC: G11B07/09

CPC classification number: G11B11/10576 ,  G11B7/0912 ,  G11B7/093 ,  G11B7/0932 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/13 ,  G11B7/133 ,  G11B11/105

Abstract: A device for adjusting the focal point of an optical pickup device in which the light reflected by a recording medium is focused at points of two systems using an optical branching filter, first and second light detectors are disposed, respectively, in front of one focal point and at the back of the other focal point, and a focal point adjusting mechanism is servo-controlled in response to the outputs from the two light detectors. Each of the light detectors has a central light-receiving surface on the optical axis and a peripheral light-receiving surface in the periphery of the central light-receiving surface. According to a first method, the focal point adjusting mechanism is servo-controlled such that the deviation will become zero between the ratio of the amount of light received in the center to the total amount of light received in the center and periphery of the first light detector and the ratio of the amount of light in the center to the total amount of light in the center and periphery of the second light detector. Even if the two detectors receive different amounts of light, the difference is cancelled between the denominator and the numerator of the ratio of the amount of light in the center to the total amount of light in the center and periphery, and the device is not affected by the imbalance in the amount of light. According to a second method, the focal point adjusting mechanism is basically servo-controlled based on the difference between the amounts of light received in the centers of the two light detectors. Here, the difference in the total amount of light received by the two light detectors is calculated throughout all stages, and the difference is used to calculate a correction value multiplied by the component ratio of the amount of light in the center to the total amount of the light received in a focused condition. Since the calculated correction value is subtracted from the difference in the amount of light received in the centers, the servo output does not contain imbalance in the amount of light falling on the light detectors of the two systems, and the device is not affected by the imbalance in the amount of incident light.