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