hand-drawn holograms

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/holohint.html 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/holo3.html

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Lots more stuff at SCIENCE HOBBYIST http://amasci.com/unew.html

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Category:

Science & Technology

Tags:

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• hologram
• holography
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• diy
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[Rxe08]

I just got a pocket watch with "hologram" etchings like this inside the case. So I suppose a form of this was known in the late 1800s.

The etching is a series of circles that appear to spin, with two spirals in the center that move and appear 3D.

[wbeaty]

> 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

[pshved]

This is amazing! Can't even imagine how much work you have put into these images. But why do you call it "holograms"? It's a different concept, and, I guess, it would be way cooler to have your own word for that :)

[wbeaty]

@pshved I only could figure out how these things worked because I already understood Benton Rainbow holograms. Basically they both work the same! Rainbow holograms have curved lines which reflect two different highlights/glints into your two eyes. Main difference is that Rainbow holograms use microscopic nested hyperbolae, not big thick circles. (Imagine if you could use lasers and wave interference to create scratch-holograms?)

See the main website about "not true holograms?"

[MNCPMSteve]

well done mate! very impressive, I'd love to see a how-too vid of the 3D cube or how to correctly create an opaque area

[wbeaty]

> see a how-too vid of the 3D cube

@MNCPMSteve and many others, someday. After procrastination. Go see the big list at...

bit.ly / drVTtw

[qqcq9z92]

is it just me or does 1:03 looks like a thumbs-up?

[wbeaty]

@Escapist166 nope, princess Leia projected images aren't holograms. They're SF movie effects, and today's scientists have no clue about how to create such a thing in real life. Not invented yet.

Genuine holograms are a metal plate or transparent plate with microscopic interference patterns. When held under sunlight or laser light, a 3D image appears within the plate (or it can float in space outside the plate.) Dr. D. Gabor invented holography in 1940s, got the Nobel Prize for it in 1971

[LoopsyTheSane]

Really neat!

[zaid2727]

Cool

[SHININGDARKNESS11]

Cube was so pro!

[arnabbasu98]

yeah man !!!



[ferdaws2000]

do u have a training for this video?

[memo2320ful]

nasıl cızılıyor

[PYates77]

@ignostu That sounds like a really cool thing to put in a museum floor.

[HeroinMethod]

Very creative, im amazed

[ignostu]

ever thought about putting holograms in walkways ?. I'm sure it'd cause some funny moments ;) , great presentation.