Electrodynamic device for translating an objective.

摘要

An electrodynamic device translates a slide 6 - which carries an objective (1) which is moved along its optical axis (18) by one or more actuator coils (24) - by means of drive coils (8) which translate over the supporting rods (9), the supporting rods forming part of a permanent-magnetic circuit comprising stator magnets (7) which produce a permanent-magnetic field in the air gaps (12) formed between the supporting rods and the stator magnets.

The air gaps are situated in planes parallel to the optical axis of the objective and the actuator coils move in the air gaps, so that the permanent-magnetic circuit co-operates both with the drive coils of the slide and with the actuator coils of the objective.