Each of the light incidence end and {HEAD ~ the light emitting end} of {TAIL ~ the mirror light guide component} is either an opening or a transparent layer 
of
Each of the light incidence end and { HEAD ~ the light emitting end } of { TAIL ~ the mirror light guide component } is either an opening or a transparent layer
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH