Under non-sequential mode, you may use b%L8mX
<w`
R;
Toroidal Lens which support aspheric surface |Nd!+zE$Z
*r@7 :a5
or you may use Biconic Lens if you make use of conic constant alone to create aspheric surface. B BbGq8p
0=# :x()e
Hope this would help, bu tbear in mind that diffraction effect is not modelable in non-sequential mode.