{HEAD ~ A real image projection system} comprising {TAIL ~ two or more optical surfaces} of revolution, with at least one comprising an aspheric surface of revolution 
comprising
{ HEAD ~ A real image projection system } comprising { TAIL ~ two or more optical surfaces } of revolution , with at least one comprising an aspheric surface of revolution
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH