Patent ID: 7733760

Claim:
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 upward-reflection mirror which reflects upward the optical beam from the first collimate lens; a second upward-reflection mirror which reflects upward the optical beam from the second collimate lens; a first objective lens which converges the optical beam from the first laser light source to an optical disc; and a second objective lens which converges the optical beam from the second laser light source to an optical disc; wherein: the first and second objective lenses are arranged in a radial direction of the optical disc, and the first and second upward-reflection mirrors are arranged in a radial direction of the optical disc; each configuration is arranged so that the optical beams from the first and second collimate lenses emanate from a common side of a plane which passes through the first objective lens, the second objective lens, the first upward-reflection mirror, and the second upward-reflection mirror; a first optical system comprises the first laser light source, the first collimate lens, the first upward-reflection mirror, and the first objective lens; a second optical system comprises the second laser light source, the second collimate lens, the second upward-reflection mirror, and the second objective lens; the first optical system and the second optical system are arranged on a common side of a radial line passing through the first objective lens and the second objective lens; and an optical axis of the optical beam from the first collimate lens is not parallel to an optical axis of the optical beam from the second collimate lens.