Patent ID: 6324137
Filing Date: 2001-11-27
Classification: B82Y,G11B

Abstract:
An information recording and reproduction apparatus for an information recording medium, comprising:optical means for emitting a laser beam on a plane of said information recording medium in which a signal is recorded, and detecting a laser beam reflected from said signal recording plane,information reproduction means for reproducing information from the laser beam detected by said optical means,drive means for driving said optical means so as to render said emitted laser beam into a pulsed laser beam, andfirst synchronizing signal generation means for generating and providing to said drive means a first synchronizing signal for emitting said pulsed laser beam to said signal recording plane in reproduction, wherein said first synchronizing signal is generated in synchronization with a signal reproduced from said signal recording plane by said pulsed laser beam,wherein said optical means blocks an inner portion of said laser beam emitted from said optical means so that a laser beam formed of a main lobe and side lobes is emitted on said signal recording plane only in reproduction.