Frensel lens, free to good (or even indifferent) home

[Wellington]

I have a 8 x 10 frensel lens, which I didn't need in the end. Happy to post it to someone who has a use for it.

 

[Nanniemate]

Yes please

 

[Wellington]

Sold!

 

[Minxy]

Yes please

Are you 'good' or 'indifferent'

 

[chaser]

What is it?

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[tonyidle]

What is it?

Wrinkly plastic ?

 

[MisterB]

Who are you calling a plastic wrinkly ....

 

[Minxy]

What is it?

<Broken link removed>

How Does a Fresnel Lens Work? The Magic Behind the Glass

I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.

science.howstuffworks.com

 

[Wellington]

I’ve no idea how it works. I bought it for negotiating junctions on on right hand drive roads, but the dinette window meant I didn’t need it. So it went for a trip round Italy in the packet!

 

[Nanniemate]

Are you 'good' or 'indifferent'

Good I hope and very grateful

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