Paul Daniel Jones wrote:

> ARGH!!!  I am trying to make a lens which will generate parallel beams
> of light with a spotlight put at it's focal point. I have tried using
> some formulae from my physics book, but just can't get it. Is there
> anybody out there who could help me?

You want a parabolic mirror with a light at its focus, like in a
flashlight. I don't know how to find the focus of a parabola though, Warp
or somebody?

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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