Gear Review Fresnel lens solar cooker using TV lens

Primer on fresnel lenses -
Fresnel lens - Wikipedia

Takeaways-
-Original fresnel lenses were used to collimate light into a beam, not concentrate it.
-The way monkey use them is to take light and focus it to a point, exactly the opposite of above.
-The smaller the lens, the finer the scribed lines must be to achieve a given effect. (See Brokor's pocket lens vs. a light house lens.)
-If you know someone with limited sight, they may have a linear fresnel that they use to magnify lines of type for reading.

 

I think it's very effective if one could collect the evaporated water because this is called 'distilled water', which is quite safe to drink. The real problem is that it will take time and effort to make it all work, and the water can only be prepared in small batches or else one would only be wasting their time. Using a fresnel lens to heat water can be very ineffective due to heat latency (the energy is not effectively heating water due to the surrounding air) and lest we forget --the weather. But, with small batches and the right lens, it can be done.

 

Bump. I'm still looking out for one of those TV lenses. I do NOT know if those youtube vids are still up.