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GxL

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)

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.

iconGxL(“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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icon 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.

icon 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.

icon 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).

icon 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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See all articles with figures and tables. To PDF File
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