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Passive
Passive
Barco has developed very high quality passive stereo
displays based on the principle of light polarization.
The viewer wears a pair of glasses containing two
oppositely polarized filters - one for the left eye and
one for the right eye. The light from each of two
projected images is polarized and can only pass
through its corresponding filter.
With a Single Projector
• The projector alternates the left eye information with
the right eye information at double refresh rate.
• A 'ZScreen' in front of the projector's lenses
alternates the polarization of the projected image
in such a way that the image of each eye passes only
through its corresponding polarizing filter of the pair
of passive stereo glasses.
1 CRT
Projector
When using CRT projection a "fast-phosphor"
green CRT is needed to obtain the required high
refresh rate. Barco CRT projectors such as the
B
R
908, 909 and 912 can be delivered with
ARCO
EALITY
this option already installed.
3D DISPLAY SYSTEMS
Stereo-enabled DLP™
or fast-phosphor green
CRT projector
1 DLP
The ZScreen for a DLP™ (Digital Light Processing™)
projector such as the B
it must cover only one lens, while a CRT projector has
three lenses.
LCD projectors cannot operate at a high enough
vertical refresh rate to produce a high-quality stereo
display with a single projector (at least 96 Hz is
recommended).
Photo courtesy of Terminal V, Austria.
ZScreen
Images at double
refresh rate on a
non-depolarizing screen
Pair of passive stereo glasses
™
Projector
G
is smaller because
ARCO
ALAXY
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