We are proposing a novel method to implement high resolution optical position sensors for automotive and
Grating diffractive incremental encoders (both linear and rotation) are already becoming commodity
products now, and include a read-out grating and a ruling grating .
We are implementing out high resolution incremental and/or absolute position encoders with a single
diffractive substrate, replicated in mass in plastic. The diffractive structures are here much more complex
than standard linear gratings. These new optical position sensors can achieve high absolute resolution
without need of electronic interpolation, therefore being potentially very fast and accurate.
Furthermore, due to the nature of these diffractive optical elements (surface relief elements), they are very
cheaply replicated in mass by either polymers embossing or injection moulding.