Optical encoders！

Any transducer that generates a coded reading of a measurement can be termed an encoder.
• Shaft Encoders are digital transducers that are used for measuring angular displacements and
velocities.
• Relative advantages of digital transducers over their analog counterparts:
– High resolution (depending on the word size of the
encoder output and the number of pulses per revolution of the encoder)
– High accuracy (particularly due to noise immunity of
digital signals and superior construction)

absolute encoder, incremental encoder, hybrid encoder, non-magnetic encoder, multi-turn encoder, multi-turn combination encoder, draw wire encoder, digital readout, linear scale

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