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