Color(/Colour) Holograms!

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Furcurequs
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Color(/Colour) Holograms!

Post by Furcurequs »

Real color reflection holograms!

Image

That case of butterflies is not a case of butterflies! It's a hologram of a case of butterflies! You can see it in the following video... ...maybe... ...though it looks like some of the butterflies may have been replaced or rearranged:

Image

"ISDH 2015 Yves Gentet Butterfly Hologram"

https://www.youtube.com/watch?v=gai4kYXRF9g

Here are links to videos of other awesome holograms:

Image

"2 color hologram singlebeam reflectie"

https://www.youtube.com/watch?v=C_fOQFeNaEU


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"Ducatie hologram 2 color"

https://www.youtube.com/watch?v=qcZ0Zn8XU8Y

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"Analogue Colour Hologram - Russian Egg"

https://www.youtube.com/watch?v=jimYiGkeR8w

Image

"Reflectie color hologram"

https://www.youtube.com/watch?v=9Em2QFI-wgY
Attachments
Ducatie hologram 2 color-qcZ0Zn8XU8Y.jpg
2 color hologram singlebeam reflectie-C_fOQFeNaEU.jpg
ISDH 2015 Yves Gentet Butterfly Hologram-gai4kYXRF9g.jpg
Reflectie color hologram-9Em2QFI-wgY.jpg
Analogue Colour Hologram - Russian Egg-jimYiGkeR8w.jpg
Jean-Marc_Sor_Butterflies.jpg
Last edited by Furcurequs on Fri Mar 24, 2017 9:42 am, edited 3 times in total.
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re: Color(/Colour) Holograms!

Post by Furcurequs »

Image

"2 color hologram"

https://www.youtube.com/watch?v=MrRufReN0Pg

Image

"2 color hologram single beam reflection"

https://www.youtube.com/watch?v=519WMEQ5vXo

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"colour hologram - Yves Gentet"

https://www.youtube.com/watch?v=KJiAu-T7yNw

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"Museum Utimate Holograms"

https://www.youtube.com/watch?v=sPl6yoNETCs

Sorry for spamming so many links, but thanks to all the bogus stuff they are now calling "holograms," too, the real ones are hard to find. I thought this would be helpful, then, if you are interested.

I saw a pretty decent single color transmission hologram at the eye doctor's when I was a kid. I think it was of a pocket watch with a magnifying glass in front of it.

I also bought a dichromatic reflection hologram when I was rather young that showed the colorful guts of a pocket watch.

...and someone, I think my sister, gave me a single color reflection hologram of a model of a tyrannosaurus rex.

I've never seen any as good as these new ones, though. I think they're pretty amazing.
Attachments
Museum Utimate Holograms-sPl6yoNETCs.jpg
colour hologram  - Yves Gentet-KJiAu-T7yNw.jpg
2 color hologram single beam reflection-519WMEQ5vXo.jpg
2 color hologram-MrRufReN0Pg.jpg
Last edited by Furcurequs on Fri Mar 24, 2017 10:07 am, edited 1 time in total.
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re: Color(/Colour) Holograms!

Post by Furcurequs »

Here's the guy who invented the process used above:

https://en.wikipedia.org/wiki/Yves_Gentet

...and here are some of his holograms that you can purchase if you have several thousand Euros to spare. The butterflies are € 5150 Euros:

http://www.ultimate-holography.com/sale-gallery

This hologram of a stack of soft drink/soda cans is pretty amazing. There's a link to a high definition video at the bottom right of the page, also.

http://www.ultimate-holography.com/no69-chamboule-tout
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Re: re: Color(/Colour) Holograms!

Post by ME »

Furcurequs wrote:Sorry for spamming so many links, but thanks to all the bogus stuff they are now calling "holograms," too, the real ones are hard to find. I thought this would be helpful, then, if you are interested.

I saw a pretty decent single color transmission hologram at the eye doctor's when I was a kid. I think it was of a pocket watch with a magnifying glass in front of it.

I also bought a dichromatic reflection hologram when I was rather young that showed the colorful guts of a pocket watch.

...and someone, I think my sister, gave me a single color reflection hologram of a model of a tyrannosaurus rex.

I've never seen any as good as these new ones, though. I think they're pretty amazing.
I used to have a lenticular card of Lucky Luck. Super Cool!

I think the most interesting development is the ability to create full-color holograms from computer generated data - even animated !.

Process:
https://www.youtube.com/watch?v=tVk5-6thgC4
https://www.youtube.com/watch?v=jCdSl_a0UAw

Engineering demos on a square meter:
https://www.youtube.com/watch?v=RLy04LeV9YE
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re: Color(/Colour) Holograms!

Post by Furcurequs »

Sorry I didn't respond sooner.

Wow, that holographic printing is rather impressive. I need to investigate that some more.

The fellow who invented the process for the color holograms above also does that sort of thing, apparently. There's an example on his website.

Though I have two small reflection holograms myself, they are both of inanimate objects. I've always wanted, however, to have a holographic portrait of a person, but due to the process in which they are made, they would have to be rather large and thus expensive.

I've looked on ebay and there are some portraits available for about $120, which is quite a good price for such things. ...but unfortunately, I can't justify spending even that amount of money on one at the moment.

There are also some smaller animated holograms available for much cheaper, but they are actually stereograms made from multiple, about 130 (I think), 2d photographic images, so the parallax is only in the horizontal.

It's sort of a cross between a real laser hologram and a lenticular one, I guess. ...and can, of course, be smaller than a real laser hologram since it is made from 2d photographic images that can be of any size.

I'm tempted to buy one of these, and the fact that some of them are of attractive Russian models in various stages of undress isn't helping to dissuade me. ...lol

If I can't afford a real sexy maid, maybe I can scrape up enough money for a small animated hologram of one!

Neil Young understood! (Though he may be expressing the desire on a different level. ...lol)

"06 Neil Young - A Man Needs A Maid (Live at the BBC 1971)"

https://www.youtube.com/watch?v=JOuQywiRUJo
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re: Color(/Colour) Holograms!

Post by Furcurequs »

I mentioned that I have a small dichromatic hologram that I bought years ago. It was made into a pendant and is of watch guts. I always thought that the "chromatic" part referred to color - as in "chroma" being color intensity, but I was wrong.

In my recent investigations I've discovered that it actually refers to a the compound used to give light sensitization to the recording medium - a compound containing two atoms of the element "chromium!"

Apparently, then, potassium, sodium or ammonium dichromates are used.

...and the recording medium for the dichromatic holograms is actually gelatin - as in the stuff you can buy to eat in the grocery store!

You don't want to eat the dichromate, though! It apparently is highly toxic and a known carcinogen. ...but you can still buy it on ebay!!

You apparently mix up some gelatin and add some dichromate to it and then coat plate glass with it and let it dry before exposing it to the laser light. Basically, during the exposure the light sensitization of the dichromate causes the gelatin to harden where it is exposed to the light and then the non-hardened gelatin is washed away during the developing/washing process.

Apparently, the dichromatic gelatin is not very sensitive to red light, however, but rather to light closer to ultraviolet. That means one needs to make relatively long exposures of green or blue laser light.

I don't know if I'll ever get to experimenting with such stuff, but maybe one day...
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