AN OPTICAL PICKUP ACTUATOR AND ITS DAMPING DEVICE

摘要

Disclosed is a damping device of an optical pickup actuator in which a damping fluid for removing a resonance of the actuator is put into a magnetic air gap formed between a magnet of a magnetic circuit unit of the optical pickup actuator and a lens holder facing the magnet to attach each other. The damping fluid includes ferrofluids having sub-micron sized particles in a carrier liquid.