Invention Grant
US08169876B2 Optical information recording method, optical information reproducing method, optical information recording apparatus and optical information reproducing apparatus 失效
光信息记录方法,光信息再现方法,光信息记录装置和光信息再现装置

Optical information recording method, optical information reproducing method, optical information recording apparatus and optical information reproducing apparatus
Abstract:
An optical information recording method of recording information three-dimensionally by irradiating a laser light beam onto a medium having a servo information plane on which address information and/or servo information is recorded, is disclosed. The method includes the steps of: dividing a laser light beam from one laser light source into laser light beams, the beam including a first light beam for reading the information, and a second light beam for recording information onto the recording medium; irradiating the first light beam onto the servo information plane to read the information from reflected light of the first light beam to read the information in which optical axes of the first light beam and second light beam are arranged coaxially; and irradiating the second light beam based on the read information to be focused onto a position in a depth direction perpendicular to a horizontal direction of the recording medium.
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