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Disclosed is a multifrequency electro-magnetic field generator that is capable of generating electro-magnetic flux fields that are projected at a distance from the device. Radial fields, horizontal fields and spiral fields are generated by the electro-magnetic field generator and are projected at a distance sufficient to engage a user of the device. A wide range of frequencies is generated as a result of the fast rise time pulses produced by the device. The geometry and structure of the device cause the electro-magnetic fields to encircle the device and be collected at the far end of the device by an antenna. This geometry and structure aid in the projection of the electro-magnetic fields.
An actuator of an optical pickup head with horizontal-arranged magnetic field generator and coil apparatus. The actuator includes a lens holder, a magnetic field generator and a coil apparatus. The coil apparatus is horizontally disposed at one side or two sides of the lens holder and includes a focusing coil