US 8,284,642 B2 · Optical disk apparatus

Abstract

An optical disk apparatus according to the present invention includes: a controller 111, which receives an instruction that a layer-to-layer jump be performed from a current layer to a target layer; a layer-to-layer jump control section 146, which adjusts a spherical aberration correction value to the target layer and then gets the layer-to-layer jump attempted; a decision section 146 for determining whether the layer-to-layer jump has been carried out successfully; and a layer determining section 146 for determining, if the focus position has been set on a non-target storage layer as a result of the layer-to-layer jump, where the non-target storage layer is located in the optical disk. The layer-to-layer jump control section 146 shifts the focus position of the light beam from that non-target storage layer to the target layer by reference to information indicating which of the multiple storage layers the non-target storage layer is.

Claims20

Dependent claims

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.

2 more elements

An optical disk apparatus for performing a read/write operation on a multilayer optical disk that has multiple storage layers, the apparatus comprising:

a controller, which receives an instruction that the focus position of a light beam be shifted to a target layer, which is one of the multiple storage layers;
a control section, which adjusts a spherical aberration correction value to the target layer and then attempts to shift the focus position of the light beam toward the target layer;
and
a layer determining section for determining, if the focus position has not been shifted successfully, where a non-target storage layer on which the focus position has been set by mistake is located,
wherein the control section shifts the focus position of the light beam from that non-target storage layer to the target layer by reference to information indicating which of the multiple storage layers the non-target storage layer is.

2 more elements

Dependencies are inferred from the claim text.

Optical disk apparatus

Life of this patent

Optical disk apparatus

Life of this patent

Abstract

Claims20