This guy always has an unreal amount of engineering lift for hobby videos. A treat to watch every time.
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neilv
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kelseyfrog
I'm confused by the authors description of holograms and my own understanding. He starts to go down a path of holographic "pixels," but whai I know about holograms is that the holographic image doesn't have such a concept - the image is delocalized.
There have been some successful attempts at handmade holograms[1] that I wonder how the video creator could adapt.
I notice a similar 'holographic' effect when coloring titanium a couple weeks back, and experimented with getting them dialed in along the same lines as this video. I didn't have nearly as much success, despite the underlying physics being similar. My guess is that the much lower thermal conductivity of titanium causes a lot more smudging than on stainless, which makes the grating effect less pronounced.
One interesting thing I noted with Ti is that satin finished Ti (media blasted with 500 grit glass media) won't take a color from electrocoloring, but will from MOPA laser coloring. Not nearly as nice as polished Ti, but still there. Given that they are such similar processes (growing a set thickness oxide layer), its somewhat surprising to see different results.
I guess I'm going to have to experiment on some polished 304.
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mikkupikku
Pity it won't work for chocolate holograms.
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brcmthrowaway
Could this be used to make a diffraction grating on PMMA?
This guy always has an unreal amount of engineering lift for hobby videos. A treat to watch every time.
YouTube wouldn't show me this video using Firefox, even with uBlock Origin disabled:
> Sign in to confirm you’re not a bot
> This helps protect our community. Learn more
> Sign in
But it would show me the video using Chromium, without an account configured.
I'm confused by the authors description of holograms and my own understanding. He starts to go down a path of holographic "pixels," but whai I know about holograms is that the holographic image doesn't have such a concept - the image is delocalized.
There have been some successful attempts at handmade holograms[1] that I wonder how the video creator could adapt.
1. http://amasci.com/amateur/holo1.html
That's much better results than mine!
I notice a similar 'holographic' effect when coloring titanium a couple weeks back, and experimented with getting them dialed in along the same lines as this video. I didn't have nearly as much success, despite the underlying physics being similar. My guess is that the much lower thermal conductivity of titanium causes a lot more smudging than on stainless, which makes the grating effect less pronounced.
One interesting thing I noted with Ti is that satin finished Ti (media blasted with 500 grit glass media) won't take a color from electrocoloring, but will from MOPA laser coloring. Not nearly as nice as polished Ti, but still there. Given that they are such similar processes (growing a set thickness oxide layer), its somewhat surprising to see different results.
I guess I'm going to have to experiment on some polished 304.
Pity it won't work for chocolate holograms.
Could this be used to make a diffraction grating on PMMA?