Fresnel lens - this is the innermost layer - clear with millions of circular ridges on one side. The crown jewel of the TV.

Fresnel lens - this is the innermost layer - clear with millions of circular ridges on one side. The crown jewel of the TV.
http://www.instructables.com/id/Giant-Fresnel-Lens-Deathray-An-Experiment-in-Opti/step1/Acquire-The-Lens/

http://www.abovetopsecret.com/forum/thread417771/pg1

http://www.youtube.com/watch?v=soK4NawBaO8&playnext=1&list=PLAF46EEF0366A7FAF