Patent ID: 7164626
Filing Date: 2007-01-16
Classification: G11B

Abstract:
1. A compatible type optical pickup comprising: a first light source that generates and emits a first light beam of a predetermined wavelength; a second light source that generates and emits a second light beam having a different wavelength from that of the first light beam; a wedge type beam splitter disposed in a first optical path between the first and second light sources, which changes traveling paths of the first and second light beams to allow the first and second light beams to travel along a same optical path and minimizes aberrations; a main beam splitter disposed in a second optical path of the first and second light sources, between the wedge type beam splitter and an optical recording medium, which changes traveling paths of incident light beams; an objective lens that focuses the first and second light beams entered via the main beam splitter onto the optical recording medium; and a main photodetector that receives the first and second light beams reflected from the optical recording medium and detects an information signal and an error signal.