| 摘要 |
An angle detection device (30) includes photoemitters (35), photodetectors (36), a scale plate (34) disposed therebetween, and a control section (33) to control them. The control section (33) includes an AFE (43) to convert analog signals (Ia) of the photodetectors (36) to digital signals (Id) and an arithmetic processor (44) to detect a rotating posture of the scale plate (34) based on the digital signals (Id). The control section (33) simultaneously emits lights from the photoemitters (35) and simultaneously receives the lights by the photodetectors (36). The control section (33) then executes the following data processing for each photodetector (36) one by one in sequence: outputting the analog signals representing an entire area of a light-receiving area of one of the photodetectors and outputting the digital signals converted by the AFE to the processor (44). |
