Patent ID: 8169880
Filing Date: 2012-05-01
Classification: G11B

Abstract:
1. A thin optical pickup which exchanges information with an optical disc by means of optical beams, the thin optical pickup comprising: a first laser light source which emits an optical beam with a first wavelength; a second laser light source which emits an optical beam with a second wavelength shorter than the first wavelength; a first collimate lens which adjusts the optical beam emitted from the first laser light source; a second collimate lens which adjusts the optical beam emitted from the second laser light source; a first objective lens which converges the optical beam from the first laser light source to an optical disc; a second objective lens which converges the optical beam from the second laser light source to an optical disc; and a auxiliary lens which changes the form of the optical beam from the second laser light source to divergence and convergence; wherein a first optical system comprises the first laser light source, the first collimate lens, and the first objective lens; a second optical system comprises the second laser light source, the auxiliary lens, the second collimate lens, and the second objective lens; the first and second objective lenses are arranged in a radial direction of the optical disc; the auxiliary lens is arranged between the second collimate lens and the second laser light source.