{TAIL ~ The optical touch device} 1, wherein the second surface of the mirror light guide component is {HEAD ~ either a curve surface} or a flat surface 
{ TAIL ~ The optical touch device } 1 , wherein the second surface of the mirror light guide component is { HEAD ~ either a curve surface } or a flat surface
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH