{TAIL ~ A semiconductor laser} feeds a high frequency amplitude modulated light in the transmitting fiber optic, which is projected by the transmitting optic module on the object in {HEAD ~ the form} of a light spot 
{ TAIL ~ A semiconductor laser } feeds a high frequency amplitude modulated light in the transmitting fiber optic , which is projected by the transmitting optic module on the object in { HEAD ~ the form } of a light spot
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH 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 OTH OTH OTH OTH