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