| hopebox |
2010-06-10 21:36 |
Allow me to repost here for depth/frequency setting hH?ke(&=f
The main fresnel lens types are: ~~ty9;KYL
9<Th: t|w
* Constant groove depth. FQMA0"(G$
* Contant groove pitch types. t$Ua&w
TjctK [db@
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. `-rtU
n 2(\pQKm
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. k@9q5lu;T
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For conic: check conic section using Wikipedia and you should see what conic constant means. LyNur8 Zi
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