1 DLP
™
Projector
1 CRT
Projector
Pair of passive stereo glasses
Images at double
refresh rate on a
non-depolarizing screen
Stereo-enabled DLP™
or fast-phosphor green
CRT projector
ZScreen
The ZScreen for a DLP™ (Digital Light Processing™)
projector such as the
B
ARCO
G
ALAXY
is smaller because
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).
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
ARCO
R
EALITY
908, 909 and 912 can be delivered with
this option already installed.
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.
Passive
Passive
3D DISPLAY SYSTEMS
Photo courtesy of Terminal V, Austria.
Stereobrochure 02-06-2003 15:39 Pagina 4
