Hi, here are some links to my website about cool things you dan do at home involving fresnel lenses.
Examples are: making a TV-projector, a high resolution LCD-Projector and turning your ordinary monitor into a big, virtual, 3D monitor with depth perception with just a lens!
You have to see it to believe it!

www.fresnellenses.tk (the main link)
users.telenet.be/cool_things_with_fresnel_lenses (if you don't like the .TK-domain)