Oh my gosh, when I was a child I remember going into a shop at the beach which sold all kinds of holographic images. And I remember a couple of them had pictures of things like a telescope or binoculars, and you could actually look into them! I've been searching for a while for any kind of information about these things, and I was almost ready to believe that I had just imagined it. But there is the same thing just 1 minute into this video!
this post was submitted on 05 Oct 2024
119 points (98.4% liked)
Technology
59448 readers
3630 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
Hmm.
You'd think that you could take three exposures, using a red, blue, and green laser, and then use optics to recombine the output to create a color hologram.
But I've never heard of such a thing. I wonder if there's some kind of physical limitation that I can't think of preventing it?
kagis
Nope. Apparently you can do exactly that, and devices do exist to do it:
https://www.litiholo.com/hologram-kits-color.html
First I'd seen of this, though.
EDIT: Ah, late in the video, they actually do show a few color holograms, the most-obvious of which is probably the R2D2 shot, which clearly has both blue and red.
Magnets.
I mean yes it's electromagnetic radiation.
F*ing magnets - how do they work?
What sorcery are these?