• Physics
  • Published 2007

Optical disk apparatus

  title={Optical disk apparatus},
  author={香山博司 and 百尾和雄},
An optical disk apparatus includes: an optical pickup unit for reading out information recorded on an optical disk; a demodulation circuit for demodulating digital data from an output signal of the optical pickup unit; and a controller for performing a servo control based on the output signal of the optical pickup unit. When performing a focus/tracking control in a recess and a protrusion of a guide groove of the optical disk, the controller obtains a focus control gain difference between the… CONTINUE READING