AN OPTICAL PROBE HAVING A POSITION MEASURING SYSTEM

摘要

An optical probe and an optical imaging system include an optical guide, and an actuator having driving coils and a magnet. By supplying a driving current through the driving a magnetic flux is generated which causes a displacement of the distal end of the optical guide. A position measuring device includes a position measuring coil used for monitoring the position of the optical guide, where displacement of the guide distal end causes change in the relative positions of the measuring and driving coils. A power supply supplies a high frequency AC current through the driving coils which causes, an induced voltage in the position measuring coil and thus generates a magnetic coupling between the measuring and driving coils. This induced voltage change is indicative for the position of the distal end.