REFLECTIVE OPTICAL ENCODER AND MOTOR, AND REFLECTIVE OPTICAL ENCODER MANUFACTURING METHOD

摘要

The present invention comprises a hub member (8) that is attached to a rotating shaft (11) and a circular scale plate (5) that is fixed to the hub member (8) by an adhesive (19) and has, on the front surface thereof, a pattern (14) comprising a high-reflection part (141) having high light reflectivity and a low-reflection part (142) having low light reflectivity. A step (23) is provided on the outer circumferential part of the hub member (8). The outer diameter of the scale plate (5) is made to be larger than the outer diameter of the outermost circumferential part of the surface (17) of the hub member (8) where the scale plate (5) and the hub member (8) are adhered to each other.