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hologram tv

NES_player4LIFE

Texture Pack Invader
Moderator
imagine a tv where you are watching a movie in 3d, on screen.
then imagine the same tv projecting a hologram at you.
say you are watching star wars IV, opening seen and the Star ship fly's from your living room and is projected into the tv.

how would we build it?
 

Cyberman

Moderator
Moderator
This was done in 1998 using LCD technology. Back then LCD color systems weren't cheap (obviously).
The 3DS and other 3d systems all use the same holographic system (yes it IS holographic) it's also fairly cheap.

How it works is that the screen is patterned with 2 holograms aligned vertically pixel for pixel.
For 2d data both the odd and even rows contain the same data.
For 3d data the odd and even rows contain images based on the light and right eye scew from a 3d image seen from one or the other (IE they have different views that are only seen from one direction in this case each eye gets a different image).

That is a holographic TV it's been around for almost 14 years, and is surprisingly simple.

Refresh rates are a bit of an issue. The LCD's have to have holograms built into the surface not cheap but much cheaper than you would think. The biggest issue is you can only view the images from a specific angle range for the affect to work well.

There has been work on other methods such as a rotating disk with high speed images being pasted on it as it rotates HP worked on this in the mid 90's

Cyb
 

blame space

New member
You might check out this

The reason for renewed optimism in three-dimensional technology is a breakthrough in rewritable and erasable holographic systems made earlier this year by researchers at the University of Arizona.

Dr Nasser Peyghambarian, chair of photonics and lasers at the university's Optical Sciences department, told CNN that scientists have broken a barrier by making the first updatable three-dimensional displays with memory.

"This is a prerequisite for any type of moving holographic technology. The way it works presently is not suitable for 3-D images," he said.

The researchers produced displays that can be erased and rewritten in a matter of minutes.

To create television sets the images would need to be changing multiple times each second -- but Peyghambarian is very optimistic this can happen.

He said the University of Arizona team, which is now ten-strong, has been working on advancing hologram technology since 1990 -- so this is a major step forward. He believes that much of the difficulty in creating a holographic set has now been overcome.

"It took us a while to make that first breakthrough, but as soon as you have the first element of it working the rest often comes more rapidly," he said. "What we are doing now is trying to make the model better. What we showed is just one color, what we are doing now is trying to use three colors. The original display was four inches by four inches and now we're going for something at least as big as a computer screen."

There are no more great barriers to overcome now, he said.

The breakthrough has made some long-time researchers of the technology believe that it could now come to fruition.

Tung H. Jeong, a retired physics professor at Lake Forest College outside Chicago who had studied holography since the 1960s told NJ.com; "When we start talking about erasable and rewritable holograms, we are moving toward the possibility of holographic TV ... It has now been shown that physically, it's possible."
 

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