Patent ID: 8284642
Filing Date: 2012-10-09
Classification: G11B

Abstract:
1. A method of making a layer-to-layer jump on a multilayer optical disk that has multiple storage layers, the method comprising the steps of: receiving a layer-to-layer jump instruction that the focus position of a light beam be shifted from a current layer of the multilayer optical disk, on which the focus position is currently located, to a target layer; adjusting a spherical aberration correction value to the target layer and then attempting the layer-to-layer jump toward the target layer; if the layer-to-layer jump has failed, determining where a non-target storage layer, on which the focus position has been set by mistake as a result of the layer-to-layer jump, is located; and retrying the layer-to-layer jump from that non-target storage layer that has been located to the target layer.