| hopebox |
2010-06-10 21:36 |
Allow me to repost here for depth/frequency setting w_ sA8B
The main fresnel lens types are: .{@aQ wN
=:;KY uTr
* Constant groove depth. [3#A)# kWm
* Contant groove pitch types. ?(!<m'jEy
uDZ$'a
So if your depth is fixed you will define +ve value in the cell and to specify the "height" or "depth" of each groove feature. If the frequency of the groove is fixed then you use -ve value. Say putting down - 5 this implies that there are 5 grooves with a unit length. +.RC{o,
1`X-
O>
For radius, this is the curvature of the base surface. If you define one such lens and chaneg the radius and you shall see what it means. A graphic tells lounder than words. A,2dK}\>
sMikTwR/^
For conic: check conic section using Wikipedia and you should see what conic constant means. >(t_
aeBA`ry"B
j$K[QSn
|
|