stereoscopynews-logo

button-3d-blu-ray  3D Movies Trailers    Follow our 3D News RSS feed Follow StereoscopyNews on Twitter Follow StereoscopyNews on Facebook

Access over 3,500 articles in 70+ categories in the HotNews menu here above.

London IMAX reopens with a new screen and digital 3D

After 13 years of operation on the London, UK South Bank, the huge IMAX screen measuring 26 metres wide and 20 metres high (85x65ft, as high as five double-decker red buses), is replaced with a brand new silver screen. The screen weights 800 Kg and is silver spray-painted on location with a purpose made robot, a mandatory step for passive glasses 3D stereoscopic projection...

The BFI IMAX was closed from Friday 22 June until Thursday 5 July, reopening today (July 6, 2012) with The Amazing Spider-Man in stereoscopic 3D. During these two weeks, they installed an IMAX 3D Digital projector alongside the IMAX film-based 3D projector, so that the BFI IMAX now has the option to present all IMAX DMR films. The BFI IMAX policy will be to show 70mm film prints whenever available until IMAX unveil their brand new laser-based projection system that can fully take the place of 70 film.

Behind the screen, you can see part of the (protected during works) surround loudspeakers. The BFI IMAX has a 11,600 Watts digital surround sound setup. Lapm power during a 3D projection as 15,000 Watts, enough to fry eggs in under one minute (but cooking and eating are prohibited in the projection booth).

new-imax-3d-screen

 The new screen

The new 27.68 meters wide IMAX screen is made in Canada and will be shipped in a crate to the BFI. Once unpacked it will then take a team of ten strong riggers to haul the 800kg of perforated vinyl up the full 20.25 metres height of the screen under the supervision of an IMAX engineer. Once secured at the top of the frame, the new screen will then be laced to the frame and pulled tight.

It takes 48 hours for all the creases to drop out of the new white screen. During this time a purpose-built spray rig will be installed. Tracks are laid at the base and at the top of the screen frame, and a spray rig tower is assembled and fitted to the two tracks. The rig can move left and right so that the spray gun can cover all of the screen. A laser control ensures that the spray gun is always an exact distance away as it makes its way up and down the screen, spraying a special silver paint that will ensure that light is reflected in straight lines off the screen. It is silver because a white screen would refract the light and this would cause ghosting of the image.

Screen Painting Robot

Tracks are laid at the base and at the top of the screen frame, and a spray rig tower is assembled and fitted to the two tracks. The rig can move left and right so that the spray gun can cover all of the screen. A laser control ensures that the spray gun is always an exact distance away as it makes its way up and down the screen, spraying a special silver paint that will ensure that light is reflected in straight lines off the screen. It is silver because a white screen would refract the light and this would cause ghosting of the image.

An incredible set of "making of" pictures is available on imgur.

Source: BFI, imgur.