OPTICAL PICKUP APPARATUS AND METHOD FOR REPRODUCING TRACKING ERROR SIGNAL

摘要

An optical pickup device and a method for detecting a tracking error signal are provided to perform a stable tracking servo by a push-pull method because the auxiliary beam is not influenced by a recording mark when signals are recorded in a dual layer disc. A photo detecting part detects auxiliary beams(505,506) irradiated to a land(502) which is not adjacent to a groove(501) to which a main beam(504) of an optical disc is irradiated. The optical disc is formed by an inverted stack type. An optical pickup for a layer 1 of the optical disc is an optical disc when information is recorded in the optical disc.