Magic Window

[Martin Dunschen]

Here is an article that I found interesting, even though very mathematical: A piece of transparent acrylic can be machined with a router, it then projects an image onto a surface when light shines through . "Magical" - because the image is not obvious or visible on the machined surface of the acrylic sheet.

I'm sure this is of interest to some of the makers in this group:

https://mattferraro.dev/posts/caustics-engineering

Martin

[jacki...@hotmail.com]

That looks great - need more time to go through the article though!