Patent ID: 7042819

Claim:
An optical pickup apparatus comprising: a light-emitting device having a photoreceptive domain for focusing error signal and a photoreceptive domain for trucking error signal formed independently, the optical pickup apparatus outputting a focusing error signal necessary for a focus servo process in response to light received in the photoreceptive domain for focusing error signal, and outputting a tracking error necessary for a track servo process in response to light received in the photoreceptive domain for tracking error signal, the optical pickup apparatus being constituted so as to reduce influences of scattering of light entering the photoreceptive domain for focusing error signal, on the tracking error signal, wherein the photoreceptive domain for tracking error signal is divided into a plurality of photoreceptive portions; and the plurality of photoreceptive domains for tracking error signal and photoreceptive domain for focusing error signal are aligned in one line.