PROBLEM TO BE SOLVED: To provide an optical encoder which can obtain an accurate detection value if the gap between a rotary slit plate and a light receiving element is varied.SOLUTION: When light from a light emitting element (3) is detected by a signal generation light receiving element (2) on a base board (1) via a rotary slit plate (4) and a pulse signal is output, an abnormality is made known by an abnormality notification unit according to the state of light reception of abnormality detecting light receiving elements (5, 6) on the base board near at least one side of the signal generation light receiving element.SELECTED DRAWING: Figure 1
【課題】回転スリット板と受光素子との間のギャップが変動しても、正確な検出値が得られる光学式エンコーダを提供する。【解決手段】発光素子(3)からの光を、回転スリット板(4)を介して、基板(1)に設置した信号発生用受光素子(2)で検出してパルス信号を出力するとき、信号発生用受光素子の両側の少なくとも一方の側において基板に設置された異常検出用の受光素子(5,6)の受光状態に応じて異常発報部によって異常を知らせる。【選択図】図1
OPTICAL ENCODER
光学式エンコーダ
2018-01-25
Patent
Elektronische Ressource
Japanisch
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