Patent ID: 8189447

Claim:
An optical disc drive for reading or writing information on a multilayer optical disc having three or more recording layers by irradiating the multilayer optical disc with a light beam, comprising: an optical pickup for irradiating the multilayer optical disc with the light beam; a recording state detector for detecting data recording states at a start point of a focus jump, a transit point or transit points on a recording layer or recording layers to be passed through, and an expected landing point of a focal point of the light beam in a focus jump to move the focal point of the light beam across one or more recording layers to a target recording layer; and a controller for moving the optical pickup to a position where the recording states are the same at all of the start point of the focus jump, the transit point or transit points on the recording layer or recording layers to be passed through, and the expected landing point of the focal point of the light beam if the recording states are different among the start point of the focus jump, the transit point or transit points on the recording layer or recording layers to be passed through, and the expected landing point of the focal point of the light beam, before starting the focus jump.