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Imax/Omnimax Motion Picture Projection Systems |
Read more at in70mm.com The 70mm Newsletter
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Written by: IMAX
SYSTEMS CORPORATION. 1980s flyer |
Date:
21.08.2020 |
IMAX
and OMNIMAX are high fidelity motion picture systems that use
state-of-the-art technology to create images of unsurpassed clarity and
impact. The IMAX image is projected onto a giant vertical screen which can
be ten times the size of a conventional screen, as much as seven storeys
high.
The counterpart OMNIMAX system presents an extraordinary experience when
images are projected to fill 86% of the surrounding dome screen of a
planetarium.
The key to the superior performance and reliability is
The Rolling
Loop film movement, used in no other projector. The Rolling Loop
advances the 70mm film horizontally through the projector; during
projection, each frame is positioned on fixed registration pins, and the
film is held firmly against the rear element of the lens by a vacuum. As a
result, picture and focus steadiness are far above normal standards. The 68
per cent shutter transmits one-third more light than does the 50 per cent
shutter in conventional projectors. Each projector incorporates a unique
Leitz Canada lens; wide-angle for IMAX and 180° fisheye for OMNIIMAX. For
IMAX screens over 5,000 square feet in size and OMNIMAX domes over 57 feet
in diameter a powerful 12 kw water-cooled Xenon lamp is used. For smaller
screens and domes an economical 4.5 kw air-cooled Xenon lamp is sufficient.
Both systems incorporate a six-track stereo
sound system,
with four screen channels and two surround channels. The specially designed
IMAX or OMNIMAX Camera photographs the largest frame ever used in motion
pictures on horizontally moving 65mm film. Because of the increased
information carrying capacity of this huge frame, the camera records images
with much greater detail than does any other motion picture camera. IMAX and
OMNIMAX are undisputed as the finest motion picture systems in the world.
•
Go to
in70mm.com's
IMAX Page
•
Go to
IMAX, IMAX Dome, IMAX Solido,
IMAX 3D, IMAX Magic Carpet,
IMAX HD
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More in 70mm reading:
in70mm.com's IMAX Page
Internet link:
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Film Format Comparison
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IMAX
70mm, 15 perforations/frame
1.91" x 2.74" Area = 5.23 sq. in.
48.5mm x 69.6mm Area = 3376 sq. mm
Both IMAX and OMNIMAX projection systems use the largest film frame in
motion picture history. The IMAX frame is ten times the size of a
conventional 35mm frame, and three times the size of a 70mm frame. The
larger the film frame, the better the picture quality.
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OMNIMAX
70mm, 15 perforations/frame
2.00" x 2.74" (Elliptical) Area = 4.30 sq. in.
50.8mm x 71.25mm (Elliptical) Area = 2775 sq. mm
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Standard
Todd-AO Format
70mm, 5 perforations/frame
.870" x 1.91" Area = 1.66 sq. in.
22.1mm x 48.5mm Area = 1072 sq. mm
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STANDARD
35mm
35mm, 4 perforations/frame
.825" x .600" Area = .50 sq. in.
21.0mm x 15.2mm Area = 319 sq. mm
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STANDARD
16mm
16mm, 1 perforation/frame
.284" x .380" Area = 11 sq. in.
7.21 mm x 9.65mm Area = .69.5 sq. mm
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Typical
IMAX theatre
IMAX/OMNIMAX theatre design is
sufficiently flexible that both small and large theatres work well. IMAX
theatres range from 120 seats to over 1000, OMN IMAX theatres from less than
100 seats to 400.
IMAX and OMNIMAX Motion Picture Projection Systems are available only from
Imax Systems Corporation, the sole owner of the patents, as well as the
trademarks IMAX and OMNIMAX
Go to The
First 70MM IMAX
Cinema in England
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Typical
OMNIMAX theatre
• Go to Temporary Closure of the Iconic La
Géode
For information:
IMAX SYSTEMS CORPORATION
38 Isabella Street,
Toronto,
Ontario, Canada M4Y 1N1
Telephone: (416)960-8509
Cable Address: "IMAXSYS"
Telex:065-24664
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28-07-24 |
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