Freeform imaging lens and freeform imaging system using the same

摘要

A freeform imaging lens defined in a (x, y, z) coordinate is provided. The freeform imaging lens comprises a first surface and a second surface opposite to the first surface. The first surface comprises a first freeform surface and a second freeform surface symmetrical about x-z plane. The first freeform surface and the second freeform surface are 5^th order xy-polynomial curve surfaces. The second surface is a 10^th order aspheric surface. The present disclosure also relates to a freeform imaging system using the above freeform imaging lens.