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Laser Dream Theater at the Aichi Expo
Impact of high-definition screen of more than 6M pixels – 50 meters wide and 10
meters high (equivalent to 2005-inch TV)
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A view such has never been seen before.
Visitors to Global House,
the central pavilion of Expo 2005 Aichi, Japan,
will be overwhelmed
by the frozen remains of an intact mammoth,
and by the 2005-inch ultra-wide high-definition
screen of the Laser Dream Theater.
As though gazing from a giant window,
visitors will see the earth
and the current state of human living.
This is a new world of the screen image,
made possible by GxL (“G-by-L”),
the latest imaging technology
under development by Sony.
The hushed still green of the forest.The embracing blue of the sky.The awe-inspiring
white of the glacier.The brilliant reds of the people of the grasslands. In scenes shot from
the air,one gets an incredible feeling of being suspended in space.Images of nature and
civilization appear brilliant and detailed, together with animation and environmental
statistics in a twenty-minute production that allows us to contemplate our relation to the
earth, now and in the future. The 11.1-channel surround sound adds extra impact.
* GxL (“G-by-L”), the GxL logo, and “HDCAM”
are trademarks or registered trademarks of
Sony Corporation.
GxL is the name of Sony technology using
an grating light valve (GLV).
* The imaging and projection for the Laser
Dream Theater uses the Mega Vision system
developed by Mega Vision Corporation.
“Mega Vision ®” is a registered trademark.
Mega Vision website: http://www.megavision.co.jp |
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This is not just an enormous screen.
The high resolution, high contrast,
and wide color reproduction range
results in a detailed image
with an unparalleled realism and depth.
The first world expo in Japan for 35 years
invites you to experience
an entirely new world of imagery.
 GxL(“G-by-L”) – the latest imaging
technology brings out the world of today
in vivid detail
“GxL” uses optical
diffraction.
What is “diffraction
phenomenon”? ...
When light impinges on a surface with grooves and
ridges in a regular pattern (a diffraction grating),
the direction of the light is deflected. This is the
same phenomenon that causes CDs to reflect the
colors of the rainbow.
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Tiny ribbon reflectors are used
to control the intensity of the
diffracted light, generating the
light and dark of the image.
A total of six ribbons are arranged to alternate
between movable ribbons and fixed ribbons,
forming an optical diffraction grating.
The movable ribbons move vertically to produce
a tiny difference in height, thus causing
the optical diffraction. Using special filters,
the diffracted light only is projected onto the
screen (reflected light is shut off). When the
six ribbons are at the same height, the image
is dark, and when the movable ribbons are
lowered the image is light.
Light source consists of
single-frequency
lasers.
Great improvement in color
reproduction
By using RGB lasers, with outstanding color
purity, as the light source, saturated colors
can be produced in a way impossible with
conventional image display systems.
Scanning with a
one-dimensional
vertical image
creates the full high-definition
image (two-dimensional
screen)
The vertical resolution is the same 1080
pixels as an HDTV image, realized by a linear array of GxL elements.
A scanning mirror converts this vertical linear image by horizontal scanning to a two-dimensional full
high-definition progressive image, 1920 pixels (horizontally) by 1080 pixels (vertically).
Combining three HDTV images — Shooting and projection system —
A special-purpose camera system is
used, in which the image created by a
single lens is split and simultaneously
captured by three cameras, assigned to
the left, center, and right portions of the
image. The resulting video material is
then recorded on three HDCAM HDTV
video systems.
The recorded images are projected
by three GxL systems, assigned to
the left, center, and right portions
of the screen. These three images
are combined seamlessly on the
screen, to form a single wide image
(each projector produces approximately
two million pixels, for a total
of six million pixels). |
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