抄録
An objective lens actuator using parallelogram focusing coils for an optical pickup was developed. The focusing coils have two coil portions which are shifted to the inner and outer side of an opposing magnet in the tracking direction. This structure reduces the moment caused by the deviation of the generated driving forces in the focusing coils when the moving part is moved in the tracking direction. The moment generated in the parallelogram focusing coils is 70% less than with conventional rectangular focusing coils.
