Patent ID: 8169876

Claim:
An optical information recording method of recording information three-dimensionally by irradiating a laser light beam onto a recording medium having a servo information plane on which address information and/or servo information is recorded, the method comprising: dividing a laser light beam from one laser light source into two or more laser light beams, the laser light beam including a first light beam for reading the address information and/or the servo 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 address information and/or the servo information from reflected light of the first light beam to read the address information and/or servo information in which optical axes of the first light beam and the second light beam are arranged coaxially; and irradiating the second light beam based on the read address information and/or servo information to be focused onto a position in a depth direction perpendicular to a horizontal direction of the recording medium to perform the recording, wherein the recording is performed bit-by-bit, and a recording plane is formed in layered in the depth direction of the recording medium to record the information three-dimensionally, the recording plane being a plane in the same depth position of the recording medium.