Patent ID: 6392972
Filing Date: 2002-05-21
Classification: G11B

Abstract:
An optical storage unit which uses a light beam to record information on and/or reproduce information from a recording medium, the recording medium is provided with at least one land and at least one groove, and information is recorded in plural sectors in each of the at least one land and at least one groove, said optical storage unit comprising:an optical phase adjuster for adjusting a phase of a polarization component of the light beam returned from the recording medium based on a track type determination of a target address; and an optical pickup for reproducing information recorded on the recording medium using said phase-adjusted polarization component of the light beam; wherein said optical phase adjuster adjusts the phase of the polarization component of the light beam to a first predetermined optical phase adjusting quantity when said track type is judged to be a land, and adjusts the phase of the polarization component of the light beam to a second optical phase adjusting quantity when said track type is judged to be a groove; and further wherein said optical pickup reproduces information from the recording medium using said first predetermined optical phase adjusting quantity when said track type is judged to be a land and a second predetermined optical phase adjusting quantity when said track type is judged to be a groove.