Technology

59696 readers

2787 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

119

How are holograms possible? (www.youtube.com)

submitted 1 month ago* (last edited 1 month ago) by barsoap@lemm.ee to c/technology@lemmy.world

6 comments fedilink hide all child comments

3Blue1Brown explains holograms in detail. The physical kind, flat plates that show 3d scenes.

you are viewing a single comment's thread
view the rest of the comments

[–] tal 6 points 1 month ago* (last edited 1 month ago)

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.