The resolution of the incremental sensor, i.e. the smallest measurable displacement of the measuring head relative to the scale, is essentially determined by the length of the signal period of the sensor, the noise of the processing electronics and the electronic interpolation factor of the signals.
The PIOne sensor achieves a resolution of 20 picometers and better, thanks to its small signal period of 0.5 µm and optimized signal processing. In this instance, interpolation with a factor of 4,000 is possible without any noise.
The sensor head of PIOne contains a Mach-Zehnder interferometer, where the optical paths are equalized and fully symmetrical, compensating for environmental influences such as temperature and humidity.
Since the signals of the PIOne can be processed by different PI controllers, the sensor can be used in positioning systems with different drive technologies.