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