Patent ID: 7839748
Filing Date: 2010-11-23
Classification: G11B

Abstract:
1. An information reproducing apparatus comprising: a medium driving portion for supporting an optical information recording medium comprising a super-resolution layer that exhibits an super-resolution effect when irradiated with a laser light and an optical information recording layer, and for rotating the optical information recording medium; a laser light source; a laser light emission control portion for controlling a light emission pattern of the laser light source; a pick-up for irradiating the rotatable optical information recording medium supported by the medium driving portion with a laser light emitted from the laser light source as a single light spot, and for detecting light reflected from the optical information recording medium; a reproduction signal processing unit for performing an arithmetic processing on a signal received by the pick-up; wherein the laser light emission control portion causes the laser light source to emit pulsed light in a light emission pattern such that a bias light emission portion and a pulse light emission portion that has higher power than the bias light emission portion alternatively appear within the single light spot, and wherein the reproduction signal processing unit obtains a reproduction signal from each of the pulse light emission portion and the bias light emission portion of the light emission pattern, and it outputs the results obtained by performing an arithmetic processing on the reproduction signal obtained from the pulse light emission portion by referring to the reproduction signal obtained from the bias light emission portion, as reproduction data.