The aspheric surface of revolution is of a design to reduce natural aberrations inherent in imaging using {HEAD ~ surface} of {TAIL ~ revolutions} of the conic family of curves 
of
The aspheric surface of revolution is of a design to reduce natural aberrations inherent in imaging using { HEAD ~ surface } of { TAIL ~ revolutions } of the conic family of curves
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH