scrobble.life
#homesteading

Recycling TV Fresnel Lens

FixedByDoc@fixedbydoc (63)2517d

I took this apart and got a 26x45 spot fresnel lens.

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It’s very powerful...

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Brand new ones this size can cost up to $3800 for a quality one. Used they go for around $250. The one I got is in near new quality and probably a re-sale value of about $200-300 to the right crowd.

TV companies buy in huge bulk to get the cost of fresnel lens down quite a bit but main reason tv's that use them cost so much.

I intend to frame this one in and build a solar laser to burn things and cook with. Something like these below...

fresnel-lens-cooking5.jpg

These other lens came out of same tv. The first and outer layer lens is a clear plastic protective lens. The second is a fogged lens to cut any glare. The third is the fresnel lens which diffuses the projector lights to help create a quality viewing.

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Comments · 6

  • @build-it.assist(46)· 2515d

    Congratulations @fixedbydoc! Your post was featured on our daily build newsletter! We set you as a %15 beneficiary of our newsletter rewards.

    Keep sharing your awesome DIY and How-to tutorials together with the recommended tags.

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  • @paulmoon410(66)· 2517d

    It's been awhile Doc, You doing well?

  • @danmcc(44)· 2517d

    Cool, My brother in law still has one of those style TVs...

  • @ligayagardener(71)· 2517d

    These are great! Salvaged ones are getting hard to come by now over this way. There used to be heaps of these tvs dumped in the roadside but that was before we knew how useful the lenses are. I managed to get 1 giant one and one good sized one. I also got some credit sized oned from ebay and found out you can use page magnifiers too... They're Fresnel too. Made some awesome experiments last year but couldn't get them to melt metal like on YouTube. Watch out for the two styles of focus. Not knowing about them can lead to a lot of frustration. One focuses as a point, the other style focuses as a line.

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  • @joythedog(48)· 2517d

    Thanks Doc, as always I learned something.

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