I guess the main confusion of defining this lens is probably the setting of depth/frequency. 5c'rnMW4+p
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The main fresnel lens types are: &X}9D)\UJ
gA" =so
* Constant groove depth. wUh'1D<(r
* Contant groove pitch types. D;BFl(l
hCQ{D|/
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. je_ 77G(F
*Ty>-aS1
Hope this helps!!
