Patent ID: 7079471
Filing Date: 2006-07-18
Classification: G11B

Abstract:
1. An optical pickup comprising: a first laser beam source generating a first beam; a second laser beam source generated a second beam having a different wavelength than a wavelength of the first laser beam; an optical system diverging the first beam at a predetermined angle, collimating the second beam into a parallel ray, converging the first and second beams to a signal layer of an optical disk, and transmitting the first and second beams as reflected from the signal layer, the first reflected beam being transmitted as a convergent beam and the second reflected beam being transmitted as a parallel beam; an optical converter converting the first reflected beam transmitted from the optical system into a parallel beam and passing the second reflected beam without conversion; and an optical detector detecting the first and second parallel beams from the optical system, the optical detector being optimized with respect to the second laser beam.