The laser beam 17, which have reached the medium surface, transmits through the transparent protective resin layer 14 and {HEAD ~ the dielectric layer} 13 to reach {TAIL ~ the recording layer} 12, at which the laser beams form a focus 18 
to reach
The laser beam 17 , which have reached the medium surface , transmits through the transparent protective resin layer 14 and { HEAD ~ the dielectric layer } 13 to reach { TAIL ~ the recording layer } 12 , at which the laser beams form a focus 18
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH