Allow me to repost here for depth/frequency setting o$YL\ <qp
The main fresnel lens types are: #2&_WM!
c0jC84*v
* Constant groove depth. ?!~CX`eMZ
* Contant groove pitch types. (3"V5r`*;
\ey3i((L
So if your depth is fixed you will define +ve value in the cell and to specify the "height" or "depth" of each groove feature. If the frequency of the groove is fixed then you use -ve value. Say putting down - 5 this implies that there are 5 grooves with a unit length. Pd\S{ Y~wk
#Gs] u
For radius, this is the curvature of the base surface. If you define one such lens and chaneg the radius and you shall see what it means. A graphic tells lounder than words. ^'C1VQ%
aBT|Q@Y.
For conic: check conic section using Wikipedia and you should see what conic constant means. i%0Ml:Y
Wgdij11e
QE$sXP7&u