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Topic: 3D projection without glasses
Message: Posted by: Watercooler (Jan 7, 2008 07:15AM)
Interesting article I just happened across, I'm sure we've all thought about this before!

Message: Posted by: Slim King (Jan 8, 2008 09:09AM)
Nice! Great for medicine although the military funded the development ... Strange but true!
Think of the magical things ... endless :)
Message: Posted by: minnich_magic (Jan 27, 2008 01:48PM)
You'd be surprised how much cutting edge, non-weaponry, high-tech is funded by the DOD. Some is never used in the battlefield arena, but instead is snatched up by high-tech companies for civilian use.

For those interested in a novel laptop that projects 3d images without the use of 3D glasses, check out the Sharp Actius RD3D notebook. Cool 15"display, but pricey.
Message: Posted by: RBerteig (Feb 1, 2008 03:06AM)
I had one of the Sharp self-stereo LCD panels on my desk at work for a while a couple of years back. With the right software behind it, it is really impressive. The only problem is that the effect is extremely sensitive to where you hold your head, and to your eyes being level. It was also difficult for more than two people to see the effect simultaneously.

All in all, quite a cool device.
Message: Posted by: airship (Feb 1, 2008 09:43AM)
The mind is really quite willing to interpret what it sees as 3D - witness its ability to decipher [url=http://www.eyetricks.com/3dstereo.htm]3D stereograms[/url]. The technological challenge has always been how in the heck to get a different perspective sent to each eye. Even a simple View-Master can do the job for an individual, but how can you do it unobtrusively for an entire audience?

The 3D movies that use polarizing glasses do a pretty good job, but the glasses kind of spoil the illusion. I've seen a couple of movies and the Michael Jackson thing at Disney World with these, and they were pretty cool. But I'm waiting for them to get this 3D holographic projection thing down. That's going to be real sci-fi stuff.
Message: Posted by: ed rhodes (Feb 3, 2008 04:23PM)
I couldn't get the Michael Jackson 3D effect to work for me when I went to Disneyworld. A much better effect (although it still uses the glasses) is Philharmagic and the Muppetvision 3D show.
Message: Posted by: malaki (Aug 16, 2017 03:38PM)
This technology has actually been around for a while. I wonder what they charged the military for it?

Back in the 1970's, the Oklahoma State Fair grounds, in their science museum, had a rather large box sitting on display. On one side was a round window with a hand projecting from it, holding a $1 bill sticking out into space. The hand and the dollar looked pretty solid. I wish I had a quarter for every time someone tried to claim the dollar as their own!

When viewing it straight on, you could see a mannequin's hand, holding the dollar, in a very well lit box, a parabolic mirror behind it and a lense between you and the dollar. A similar set up to the double parabolic mirror they sell at the magic stores that projects the image of a coin or dice above the surface. The more light that bounces off of it, the more realistic it looks.

Similar to Pepper's Ghost. Pretty low tech, really, compared to what I expected.