The illumination system includes a light source for producing a beam of parallel light, and optics for directing {HEAD ~ the produced beam} through the telecentric lens system along {TAIL ~ the optical axis} thereof, and through the hole 
along
The illumination system includes a light source for producing a beam of parallel light , and optics for directing { HEAD ~ the produced beam } through the telecentric lens system along { TAIL ~ the optical axis } thereof , and through the hole
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 HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH