| 摘要 |
PURPOSE:To make a device small-sized, high-output, and high-S/N by arranging a light source in one side of an encoder with plural slits which is attached to a revolving shaft and arranging a specific photoelectric transducer in the other side. CONSTITUTION:A rotary encoder 13 provided with n-number of slits on the overall circumference is fixed to a revolving shaft 12 of a motor or the like, and a plane light source 14 which irradiates slits 13a is arranged in one side of this encoder 13, and a plane photoelectric transducer 15 is arranged in the other side. Photoelectric transducer pieces 15a and 15b on the transducer 15 are provided at the same pitch as slits 13a, and the group of pieces 15a and 15b is divided into, for example, two, and output ends 15a' and 15b' are connected to one position, and an output photoelectromotive current is taken out. Thus, working limits of gears in the magnetic system are eliminated. |
