{HEAD ~ An optical scanner A} for {TAIL ~ a video recording disc} B includes a photo detector 6 for sensing the light from a laser source 1 reflected back from the disc 
for
{ HEAD ~ An optical scanner A } for { TAIL ~ a video recording disc } B includes a photo detector 6 for sensing the light from a laser source 1 reflected back from the disc
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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