How does the encoder work?

Encoders are used to measure physical quantities such as speed,position,angle.It is a sensor that converts mechanical displacement into electrical signals and is divided into incremental and absolute values.

Incremental encoders generate pulse signals that measure the speed ,length or position using the number of pulses.For absolute encoders,each position is a digital vaule for a displacement.Inside the encoder is a rotating disc (code wheel ) with a number of transparent and opaque windows the opto-electronic receiver collects the intermittent beam,thus converting the light pulse into an electrical pulse and then out putting it electronically.The line is processed and output.