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hand-drawn holograms

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See http://amasci.com/holo/ Scratch-holograms can be made upon CD/DVD cases or other soft plastic using a couple of thumbtacks poked through a stick. Or get fancy and use a professional compass and black-painted polycarbonate plates. Or automate the process with a paperclip stuck into a motorized electric eraser, or a CNC mill with a drag-engraving tool. For lots of hints, see http://amasci.com/amateur/holo... Best is to use a good $10 compass, soft plastic that's slightly greasy, and replace the extremely sharp compass needle with a small finishing nail. Clear plastic works fine, or place some dark paper behind it. Are these genuine holograms? Abrasion holography or "Chatoyant holograms" employ the same physics as white-light or "rainbow" holograms invented by Benton at MIT. Benton holograms reflect light from a point source, and they do not require any interference pattern. This is why a Rainbow Hologram functions the same under any wavelength of illumination. The fringes of Benton holograms can have any spacing: even spacings much wider than wavelengths of light. Said another way: if the holograms on your credit cards are genuine holograms, then also "Scratch-holograms" must be genuine holograms. See http://amasci.com/amateur/holo... . Lots more stuff at SCIENCE HOBBYIST http://amasci.com/unew.html . Note: trolls & spammers blocked instantly. Zero tolerance.

Channel: Science & Technology
Uploaded: November 30, 1999 at 12:00 am
Author: wbeaty

Length: 02:59
Rating: 4.8730597
Views: 924368

Tags: hand  scratch  abrasion  hologram  holography  drawn  diy  science  physics  optics  project  amasci  gadget  

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Video Comments

LoopsyTheSane (November 30, 1999 at 12:00 am)
Really neat!
zaid2727 (November 30, 1999 at 12:00 am)
Cool
SHININGDARKNESS11 (November 30, 1999 at 12:00 am)
Cube was so pro!
wbeaty (November 30, 1999 at 12:00 am)
> pocket watch with "hologram" etchings @Rxe08 Yep, "engine turning" surface decor on pocket watches, firearms, calculators, steam engines. Look up Guilloche, and rose engine lathe, a Victorian analog computer spirograph. They came THIS CLOSE to discovering the Rainbow Holograph geometry and 3D imagery from mechanical "ruling engine" diffraction. Secret of master portraitist: fine nested curves on painting's eyes gives 3D glitters, so they almost follow you. See: bit.ly / A6ugR5
arnabbasu98 (November 30, 1999 at 12:00 am)
yeah man !!!
ferdaws2000 (November 30, 1999 at 12:00 am)
do u have a training for this video?
memo2320ful (November 30, 1999 at 12:00 am)
nasıl cızılıyor
PYates77 (November 30, 1999 at 12:00 am)
@ignostu That sounds like a really cool thing to put in a museum floor.
HeroinMethod (November 30, 1999 at 12:00 am)
Very creative, im amazed
ignostu (November 30, 1999 at 12:00 am)
ever thought about putting holograms in walkways ?. I'm sure it'd cause some funny moments ;) , great presentation.


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