Allow me to repost here for depth/frequency setting C?|sQcCE
The main fresnel lens types are: |>(Vo@
) 'xyK
* Constant groove depth. ?>+uO0*S
* Contant groove pitch types. ug]2wftlQ
-dovk?'Gj
So if your depth is fixed you will define +ve value in the cell and to specify the "height" or "depth" of each groove feature. If the frequency of the groove is fixed then you use -ve value. Say putting down - 5 this implies that there are 5 grooves with a unit length. LhAN( [
FC+-|1?C
For radius, this is the curvature of the base surface. If you define one such lens and chaneg the radius and you shall see what it means. A graphic tells lounder than words. fcdXj_u
D N!V".m`J
For conic: check conic section using Wikipedia and you should see what conic constant means. RP2$(%
M<Bo<,!ua
+(DzE
H |