Prototype uses multi-lens display for 3-D depth (w/ video)

Nov 07, 2011 by Nancy Owano report

(PhysOrg.com) -- Numerous 3-D displays that went on parade at last month's CEATEC 2011 in Japan touted glasses-free features, but one 3-D display presentation used a technique of special interest. Researchers at Tsukuba University in Japan showed a 3-D display prototype using multiple layers of lenses for focal depth and enhanced depth perception in the 3-D image. When objects at the front are in focus, those at the back are blurred. When you view objects at the back, those in front are blurred.

The core feature of this display is that it reproduced focal depth. According to the video notes, the display is available in two versions. In one, the joins in the are smooth. When you move your head, the picture appears smoothly. This display has seventy-six viewpoints, reproducing natural motion parallax. The other version has fifty viewpoints and higher resolution, achieved by lenses with non-aligned centers.

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While ordinary glasses-free 3D displays only have parallax horizontally, this one has, in the case of fifty viewpoints, ten horizontally and five vertically. The picture changes not only when you move horizontally but also when you move vertically. In other words, a feature of this display is that you can see a 3-D picture when lying down with your head horizontal. The sticking point is resolution.

"The resolution of this display is about 200 x 200, so it's not sufficient yet," said Professor Hideki Kakeya. “But one feature of this system is that, if you don't have a single high-resolution panel, you can use an array of small panels, with lenses arranged so as to hide the bezels. Doing that costs money, but in principle, it isn't very difficult to increase the resolution.”

In carrying out his research, Kakeya's target base has not been the entertainment industry but rather how this technique might play out in 3-D scenarios for specialized purposes.

His target is the realtime interaction scenario where the viewer needs to perceive 3-D space instantly -- robot tele-operations, 3-D drawing and surgery simulations are examples.

The main application for the display is reported as the picking up of objects by remotely operated robots. That exercise, like the others, would need depth to be shown accurately.

Beyond CEATEC, Prof. Kakeya’s work focuses on precise using coarse integral volumetric imaging (CIVI). This is defined in a recent paper as 3-D display technology combining multi-view and volumetric solutions by introducing a multilayered structure to integral imaging.

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More information: via Diginfo

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User comments : 6

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Isaacsname
not rated yet Nov 07, 2011
Interesting reflector in the back. I wonder if they've played around with layered lenses ?

http://www.faqs.o...10180695

I bet there are some pretty neat things you could pull off with the right combinations of layered lenses and reflectors with specific geometries, maybe even make them adjustable by mounting the reflecting surface on a frame( some sort of recursive and equidistant tiling pattern ) and using vacuum pressure to make micro-adjustments to each individual " cell ".
ScottyB
1 / 5 (1) Nov 07, 2011
Shame the video is not working
3MAJ
not rated yet Nov 07, 2011
It is working for me...
astro_optics
1 / 5 (1) Nov 07, 2011
Is anyone considering bandwidth implications for this?
marypotter
not rated yet Nov 08, 2011
it is a little complicate to me tell them .
Ricochet
not rated yet Nov 08, 2011
If they could work that into a pair of goggles, you're talking about some very beneficial applications, like remote surgery, remote recon (military) with human-controlled robots that give real depth-of-view, and flight simulation.