“It’s like the holy grail… what all media is theoretically going toward. This is not stereoscopy. This is real 3D of everything. You don’t need glasses,” he said.
NICT’s holography is very crude and at cursory glance, unimpressive. Schubin said most onlookers were underwhelmed. The display consists of an optical table resembling a slab of granite with a bunch of lenses and mirrors controlled by micrometers moving them fractionally
Now here is more on the NICT electronic holography. On the reproduction end, it appears to be true wavefront reconstruction. Laser beams are used just as they were in original holograms to reproduce the wavefronts captured in the interference patterns of the holograms. Three lasers were used for the three primary colors. The resulting hologram appeared to float in space. It was tiny and had a limited viewing angle. It also suffered not only from laser speckle but also from other noise.
On the capture end, the system is not holographic. It uses something called an “integral camera.” It is an ultra-high-definition camera (sometimes referred to as 8K) shooting a normally-lit scene through a “fly’s-eye” planar array of small lenses. A computer then processes the image into an interference-pattern type hologram, using the wavefront information captured from the fly’s-eye lens array. The interference patterns are then sent electronically, live except for the processing latency, to three small liquid-crystal displays, which are illuminated by the reproduction lasers.
Incidentally, across the aisle, NHK (Japan Broadcasting Corp.) showed a very similar 8K integral camera. But this time the image was projected directly through another lens array onto a screen. Viewers needed no 3D glasses and could move their heads to see around objects.
3DTV Based on the Integral Method
- The 3DTV with integral method is based on extremely high resolution video.
* The experimental setup produces full-color and full-parallax 3D images in real-time, however, the setup has not reached practical level yet.
* To produce higher quality 3D images for television, it requires a larger number of pixels for the capture and display stages. Although this problem must be overcome, our experimental setup has been progressed one step for practical use.
3DTV : based on integral method (9 page presentation from 2009)