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