| 摘要 |
An absolute encoder includes a scale (SCL) in which plural marks are arranged at a first pitch; a detector (PDA) configured to detect a predetermined number of marks corresponding to one of the absolute codes; and a calculator (CULC) configured to calculate an absolute position of the scale based on an output of the detector. The calculator is configured to generate a data sequence constituted by the predetermined number of data by respectively quantizing the predetermined number of periodic signals output from the detector, and to obtain first position data corresponding to the one of the absolute codes based on the generated data sequence, to obtain second position data based on a phase of at least one of the predetermined number of periodic signals, and to generate data which represents the absolute position by combining the first position data and the second position data. |
