Well, i would like to post this tutorial, but i'm not sure if this
is allowed, because non-registered users can't see this tutorial
and then i have to contact the author for permission, i guess. :-(

But let's forget for a moment all this laser optics stuff, how do
i have to measure or construct properly "a flat fruit bowl surface" with
a curvature angle less than 10 degrees, let's say for example 9.5 :-)

If i can do this properly i "only" must play with the light settings,
i assume, in order to get the desired result.

Regards
Stefan