OPTICAL DISC APPARATUS, OPTICAL INFORMATION EQUIPMENT WITH THE OPTICAL DISC APPARATUS, AND FOCUSING CONTROL LSI IN THE OPTICAL DISC APPARATUS

摘要

In the present invention, at the time of pulling a focus on an information recording surface of a disc, a focus servo is first pulled in a substrate surface of the disc, and with the servo in a settled state, a driving signal necessary for following surface wobble is stored, and a focus is pulled in the information recording surface of the disc based upon a signal superimposed with the driving signal and a focus search driving signal.