I guess the main confusion of defining this lens is probably the setting of depth/frequency. !zPG? q]3
M
:3u@06a
The main fresnel lens types are: =X?\MVWB
SVjl~U-^
* Constant groove depth. 2<& Bw2
* Contant groove pitch types. < B_Vc:Q
UA[,2MBp
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. ZpUCfS)|&
j1SMeDDM
~
Hope this helps!!
