I guess the main confusion of defining this lens is probably the setting of depth/frequency. rh`.$/^
_GO+fB /Q1
The main fresnel lens types are: R*@[P g *
d_C 4B
* Constant groove depth. b#g
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* Contant groove pitch types. JYd7@Msfc
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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. |.C
)@qup _M@
Hope this helps!!
