Patent ID: 6298020
Filing Date: 2001-10-02
Classification: G11B

Abstract:
A focus search method for a digital disk, comprising the steps of:moving a focus of an emitted light beam close to a recording layer from an outer side of either of two recording layers of a digital disk in which at least two recording layers, namely, a first layer and a second layer, are formed;receiving a reflected light beam from the digital disk;carrying out control to focus the received light beam on a specified layer; andperforming a layer jump in response to an instruction indicating a layer change;wherein focusing control is carried out from the same direction only if a layer jump to the first layer has been improperly performed when an immediately preceding focus search was started from an outer side of the first layer, or only if a layer jump to the second layer has been improperly performed when an immediately preceding focus search was started from an outer side of the second layer.