Patent ID: 6466527
Filing Date: 2002-10-15
Classification: G11B

Abstract:
An optical disk device reproducing information recorded on a signal recording surface of a plurality of layers of an optical disk, comprising:information reading means (60) for illuminating said optical-disk with beam and detecting light reflected from said optical disk (1) to read said information; acceleration means, when said information reading means (60) is focusing on the signal recording surface of one of said plurality of layers, for generating and providing to said information reading means (60) an acceleration signal to allow said information reading means (60) to focus on the signal recording surface of another of said plurality of layers; and deceleration means for generating and providing to said information reading means (60) a deceleration signal for controlling said information reading means to stop when a predetermined level of reflected light is not obtained from said information reading means after application of said acceleration signal from said acceleration means to said information reading means.