In a dual focusing optical pickup device, a laser beam is incident on {HEAD ~ an optical member} via {TAIL ~ a beam splitter} 
In a dual focusing optical pickup device , a laser beam is incident on { HEAD ~ an optical member } via { TAIL ~ a beam splitter }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL