Reproducing apparatus, and method of adjusting spherical aberration correction and focus bias

• Main Author: SAGARA SEIICHI
• Format: Patent
• Language: English
• Published: 03.08.2010
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

A reproducing apparatus includes a head unit operable to direct a laser light beam onto a recording medium, the head unit having a focus servo mechanism and a spherical aberration correction mechanism for laser light; an evaluation signal generating unit operable to generate an evaluation signal ser...