Patent ID: 8161503

Claim:
An objective lens actuator, comprising: two objective lenses, the height of one objective lens being different from the height of another objective lens, with each objective lens focusing lights upon an optical disc; an objective lens holder member for holding the objective lenses thereon with aligning them in a tracking direction; and a first, a second and a third lens protectors, provided on said objective lens holder member, for preventing said objective lenses from being contacted on the optical disc, wherein said first and second lens protectors, are provided on both ends of said objective lens holder member in a tracking direction, near ends of said two objective lenses, respectively, with the height of said second lens protector is being closer to the optical disc than said first lens protector and said third lens protector is provided between said two objective lenses and its height is the closest to that of the optical disc than heights of said first and second lens protectors.