The subreflector is configured to receive each composite illumination beam at the preselected location and direct the central ray of {HEAD ~ each composite illumination beam} towards {TAIL ~ the main reflector} 
The subreflector is configured to receive each composite illumination beam at the preselected location and direct the central ray of { HEAD ~ each composite illumination beam } towards { TAIL ~ the main reflector }
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 HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL