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Frequently Asked Questions
- How does the DepthCube z1024 3D Display work?
The DepthCube z1024 3D Display is a rear-projection volumetric display in which a high-speed DLP(TM)
video projector sends a series of 3D image slices into a 3D projection volume. The projection volume is
composed of a physically deep stack of 20 electrically-switchable liquid crystal scattering shutters. At any
instant in time 19 of scattering shutters are transparent and only one is in a white scattering state. We
switch a single shutter into the scattering state and project onto it the appropriate image slice
corresponding to its physical depth. Since each image slice is stopped in the projection volume at the
correct depth, the DepthCube produces a 3D image that is truly deep.
A patented 3D anti-aliasing hardware algorithm virtually eliminates the visual discontinuities between
layers so that the 3D image appears to be completely smooth and continuous.
With the high speed projector sending out 1000 image slices per second, the whole volume is refreshed
50 times a second. This is comparable to field refresh rate of NTSC video in the US and PAL video in
Europe (although the actual frame refresh rate of these is 30 Hz and 25 Hz respectively). Due to the high
speed digital interface between the computer and DepthCube Z1024 3D Display, a completely new 3D
image can be written to the display nearly 20 times each second.
Although not quite fast enough for Virtual Reality, this update rate is fast enough for real-time user
interaction with the 3D image. We've even played video games on it.
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