Hiding Images in Plain Sight: The Physics of Magic Windows

While the described window is not a hologram per se and I think the hologram-like effect can easily break for other images (i.e. it can not reliably represent depth), it should be noted that it has a certain relation to holograms. Holograms modify plane wave in a way which reproduces wavefront from a recorded scene. Usually it's done by capturing interference pattern, but alternatively hologram can introduce phase shifts by varying thickness (ideally it's worth to use both phase shift…

Reminds me of magic mirrors of Japan and China. https://www.cnn.com/style/article/magic-mirror-cincinnati-ar... https://www.greenshinto.com/2014/02/16/magic-mirrors/

Impressive work and fantastic write-up, thanks for sharing. Just wanted to say your post on how to build a CNC router [1] was enough to convince me that maybe I could build one too - so I've been using it as a primary reference and my CNC router is slowly but surely coming together. It was great to see you leverage your homemade router in this post as well. Looking forward to more content from you! P.S. I would definitely…