Information recording device, information recording control method, information reproducing device, information reproduction control method

摘要: PROBLEM TO BE SOLVED: To realize good recording/reproducing considering surface-wobbling of a disk type optical recording medium. SOLUTION: This device is provided with storage part 31 storing quantity the prescribed radius medium 51, near field light emitting 7 converging beam emitted from source 3 and converged when it arranged at for an information plane 51 as light, first control 30 generating signal by multiplying read out gain controlling so that follows to quantity, second 40 keep distance in based on linear characteristic return light. COPYRIGHT: (C)2004,JPO&NCIPI