Patent ID: 7995437

Claim:
An optical pickup comprising: a light source to emit a light beam having a predetermined wavelength; a plastic objective lens to condense the light beam emitted from the light source on an optical disc; a light detector to receive the light beam reflected by the optical disc and detects the light beam; an objective lens driving unit to drive the plastic objective lens in a tilt direction to tilt the plastic objective lens; and a lens tilt sensitivity sensing unit to sense a lens tilt sensitivity that is denoted by ΔW LT /Δθ, in which ΔW LT is a coma aberration amount occurring at a time of tilting the plastic objective lens and Δθ is a lens tilt amount at that time, wherein, in the case where the lens tilt sensitivity sensed by the lens tilt sensitivity sensing unit is equal to or larger than a predetermined value, lens tilt correction is performed by tilting the plastic objective lens so that a quality of a signal detected by the light detector is improved, and in the case where the lens tilt sensitivity sensed by the lens tilt sensitivity sensing unit is smaller than the predetermined value, the lens tilt correction is not performed.