I guess the main confusion of defining this lens is probably the setting of depth/frequency. MjQ[^%lfL
my\o P(e\
The main fresnel lens types are: >,>;)B@J
Jtp>m?1Ve
* Constant groove depth. y8w0eq94
* Contant groove pitch types. oNuPP5d[]
egI{!bZg'\
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. : F7k{~
C# Hcv*D
Hope this helps!!
