NGC-Fresnel Lens

[redrider]

Any one here play around with one? I scavenged one from a discarded Sony projection TV and have seen some high powered demos on 'tube. Solar forge, pool heater-oh, the possibilities.

[Lannis]

Any one here play around with one? I scavenged one from a discarded Sony projection TV and have seen some high powered demos on 'tube. Solar forge, pool heater-oh, the possibilities.

I still have the setup from 1970 when I bought a 14" lens from Edmund Scientific and built it into a frame and a little crucible below.

You could melt a penny in that thing.   I didn't do anything useful with it except see what I could melt with it.   You have to have some sort of tracker to keep it pointed at the sun for best efficiency.

Lannis

[Dean Rose]

http://www.solarcooker-at-cantinawest.com/fresnel-lens-solar-grill.html


Dean

[rocker59]

Hmmm...

[redrider]

solar powered clothes dryer.

[Lannis]

solar powered clothes dryer.

There's a simpler way to do that that doesn't involve a Fresnel lens .... !

[redrider]

Not if I need to go to Poland for some poles.

[rodekyll]

That's what makes a lighthouse work.  I use them in camera viewfinders for my old 35mm Nikons and all my large format equipment.  They really make use of available light.

[canuguzzi]

Some older RV motorhomes use them on the rear window to magnify the image for rear view. They are sold as stick on accessories.