The role of a nanopositioner is to move to or position a probe, part, tool, sample, or device at some desired position with nanometer accuracy and repeatability. The positioner should also be able to resolve adjacent positions that are separated by less than a nanometer. The applications of nanopositioning devices fall in to two broad categories, position-and-hold or scanning:
In a position-and-hold mode, the goal is to put an object at a precise position and require it to remain there for extended periods of time. The requirements of the positioner in this mode are for high thermal stability and for very low long-term drift in the electronics. nPoint designs its positioning products with unique features to minimize thermal effects. Additionally, nPoint’s ultra low-noise sensor and driver circuit assure that drift from the commanded position is very low, within nanometer positional accuracy over many hours.