Aberration compensator, optical pickup and aberration revision method

摘要

Type of optical disk is distinguished due to the disk distinction section (71), ranking of the aberration which it should revise with the ranking setting section (72), according to the type of optical disk is set, through the liquid crystal driver (22), with the drive control section (74), drive of the liquid crystal optical element (21) is controlled, aberration of the light beam is revised on the basis of the ranking of aberration. Importance of aberration revision differs according to the type of optical disk, ranking of aberration is set following to the importance of aberration revision.