Encoder for providing incremental and absolute position data

摘要: An optical encoder has a single data track which is scanned photoelectrically by scanning unit. The consists of an incremental and plurality overlying code tracks so that it possible to generate output signals as well at least coarse absolute positional information only one track. unit comprises first detecting with phased array photodetectors scan the graduation. A second provided for tracks. can be used commutation brushless motors.