| 摘要 |
PROBLEM TO BE SOLVED: To obtain an optical disc apparatus that can automatically set the optimum focus condition of a optical system and the power condition of laser on the occasion of recording and reproducing information. SOLUTION: In this optical disk apparatus, information is recorded or reproduced to/from a recording medium 1 by irradiating the recording medium 1 with an optical beam emitted from a light emitting element 2 via an optical system 3. In this case, there are provided a focusing amount control means 5 for adjusting the optical system 3 to control the focusing of the emitted optical beam, a drive current control means 6 for controlling a drive current of a light emitting element 2 to control intensity of the emitted beam, a reproduced signal processing means 7 for converting the optical beam reflected from a recording medium 1 into an electrical signal as the reproduced signal, a judging means for judging the propriety of the reproduced signal and a control means 8 for individually controlling these means. |
