an objective lens for focusing {HEAD ~ beams} onto {TAIL ~ an optical disc} wherein the beams proceed respectively toward the optical disc via the beam splitter after being reflected by the optical member and the reflecting member; and 
onto
an objective lens for focusing { HEAD ~ beams } onto { TAIL ~ an optical disc } wherein the beams proceed respectively toward the optical disc via the beam splitter after being reflected by the optical member and the reflecting member ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH