Under non-sequential mode, you may use 5**xU+&
y C#{nUdw
Toroidal Lens which support aspheric surface 98"N UT
R
>TtAm0N
or you may use Biconic Lens if you make use of conic constant alone to create aspheric surface. b;vO`
2_C.-;!
Hope this would help, bu tbear in mind that diffraction effect is not modelable in non-sequential mode.