low price lenses

[jeff1500]

Here's lots of lenses for just a small amount of money.
http://www.sciplus.com/category.cfm?subsection=21

Does anyone know how to make a beam with no hot spots. Kind of like a projector?

Here's some basic optics ideas. I haven't figured it out yet.

http://acept.la.asu.edu/PiN/rdg/lenses/lenses2.shtml