OPTICAL DISK REPRODUCING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an optical disk reproducing apparatus that can make an accurate decision in spite of a variance in turntable height and a variance in pickup sensitivity and can measure a correct recording surface position by eliminating an influence of an S shape of the surface reflection of a disk. SOLUTION: Focus drive values of media which have been reproduced once are recorded by a medium in a nonvolatile memory so that disk kinds can accurately be decided while a variance in mechanism precision and a variance in pickup sensitivity are allowed, and then accurate decision can be made in spite of a variance in turntable height and a variance in pickup sensitivity. COPYRIGHT: (C)2005,JPO&NCIPI