Doc writes in -
Making lo-rez holograms on a CNC - Figured you guys might get a kick out of this, as the fellow not only made his own CNC mill (including using homebrew laser interferometry to determine how flat the table is, and anodizing it himself) but has recently been experimenting with CNC engraving.Making synthetic holograms with a CNC mill - Link.
Posted by Phillip Torrone |
Jan 11, 2008 05:00 AM
DIY Projects, Imaging |
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Reminds me of some experimentes I did a bunch of years back with abrasion holograms.. i didn't have a CNC, so the best i could do was lines and points.
http://amasci.com/amateur/holo1.html
that might actually be the article I read back in the day about it. Nifty stuff.
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Yorgle: I was just going to post about the abrasion holos. They're incredibly easy and fun to make.
off-topic: can we not login any more? I used to be able to login here and post but it seems they've now made it more so anyone can post as long as they pass the CAPTCHA. Am I missing something?
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"Hand-drawn holograms" was never in Scientific American, although it was featured in a couple of magazines over the years. I came up with the idea in the early 1990s, but it turns out another artist (Gabriel Liebermann) had discovered it in 1979! But while he kept it a secret, I made it "Open Source" in early days of the www. Zillions of kids have used it for science fairs.
I tried some engraved versions once. The glossy shine of the groove surfaces is extremely important, and it works best if you partly fill the grooves with gloss-type paint. Just give the panel one or two thin coats of black spray paint.
More info here: http://amasci.com/amateur/hand1.html
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@ehrichweiss - yup, CAPTCHA now
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Bill,
I'm using drag engraving. It leaves a highly polished surface in the mark.
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