ProjectionTV fresnel lens

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up close and not focused to such a great point these would be a gnarly intensifier internally in a home made solar panel.

Once you've removed the lens, you can either use it as-is (just find some sun, and focus it!), or make a frame to hold it in. Here are a couple variations:

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When sunlight passes through the Fresnel lens, it changes direction towards one specific point. When several beams of high-powered sunlight meet at that point, it intensifies the power of the sun and incinerates anything in its way. You can read more about Fresnel lenses here.

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I'd recommend making a stand, it protects the lens and also is very convenient. However, it is quite bulky and hard to store. Here's a video of the lens in action!

This could also be used in so many other ways. I just had a flash thought of Steam engine turbine powering a generator and also heating water for whatever the need be. there are so many available, people pay me to throw them away for them. i am going to get a load of lenses to store and just keep them for something in the future out in one of my sheds.

OMG, I have so many available to me! LOL I have to see what happens when I focus 2 or more into one. I can barely believe what i have just seen, glass melting - 1400 to 1600 C wow!

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In order to use the Fresnel lens, it's necessary to open up the TV and remove the frame. Here's a video demonstration of the deconstruction:

Very cool way to decommission an old TV. In fact, reading through some of your other tutorials, old TVs seem to be a treasure trove of parts for fun projects!

In this article, I'll show you how to make an awesome "Death Ray" using the large magnifying lens from an old projection TV. The lens is called a Fresnel lens; a device that employs several ridges to focus light, rather than a complete curve.