Patent ID: 6542448
Filing Date: 2003-04-01
Classification: G11B

Abstract:
An information recording apparatus for recording information to an optical recording medium, including a disk-like substrate, a spiral or concentric-shaped groove structure along tracks formed on the disk-like substrate, each of the tracks being divided into a plurality of recording units, each of the recording units including a dropout portion in a circumferential direction of the groove structure, the dropout portion being a non-groove portion, the groove structure being formed with a wobble in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track, and each length of the recording units being an integer multiple of the cycle of the wobble, the information recording apparatus comprising:an irradiation source for irradiating a light spot on the optical recording medium; and control means for controlling an irradiation position of an optical spot from the irradiation source.