Encoder, rotation speed detecting apparatus, the moving speed detector, the rotational angle detecting apparatus, the moving position detecting device, the rotation direction detection apparatus, the moving direction detecting unit, jog dial, and the switch

摘要

PROBLEM TO BE SOLVED: To provide an encoder having small size and low power consumption.;SOLUTION: In the code disk 4, a low emissivity region 2 and a high emissivity region 3 are alternately arranged in a circumferential direction to form a code. When the code disk is rotated, infrared radiation from the low emissivity region 2 and the high emissivity region 3 is detected by non-contact infrared sensors 1a, 1b. In a wave form shaping part 170, electric signals from the infrared sensors 1a, 1b are amplified by amplifiers 9a, 9b, and are normalized by signal level normalizing circuits 12a, 12b to generate digital signals 11a, 11b.;COPYRIGHT: (C)2007,JPO&INPIT