Incremental encoder structure！

When a disk with an optical pattern revolves along with the shaft, light passing
through two slits is transmitted or blocked accordingly. The light is converted to electrical currents in the detector elements, which correspond to each slit, and is output as two square waves. The two slits are positioned so that the phase difference between the square wave outputs is 1/4 pitch.

There are many kinds of optical encoders,incremental encoder,absolute encoder,manual pulse generator,magnetic ring encoder,optical bearingless spindle encoder,servo motor encoder,digital code rotary witch,gear tooth encoder,linear scale,digital readout,draw wire sensor

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