Creating A Large Format Studio
The AH project necessitated building a large climate controlled studio incorporating a 6 x 5 metre optical table weighing around 25 tons. The system had to allow for both the creation of large-depth scenes for mastering, in addition to affording the space required for the effective production of ultra-large format rainbow transmission and reflection hologram copies. A heavy sand-filled cavity steel construction was used for the table. The suspension system was constructed around nine Firestone air bags connected to a standard pneumatic set-up with needle-valves, ballast tank and compressor. Overhead towers were designed to carry large transfer mirrors at heights of over three metres above the table. These towers were constructed from hollow steel tubes filled with sand. Over the years, lifting systems for the large glass filmholders evolved from hand operated, to mechanical and finally to pneumatic. Using this platform, it is possible to hold flat a 2 x 1 metre piece of film and maintain it’s stability, and that of the related optics, beneath the 5,000th of a millimetre tolerance for the 4 – 8 second exposure.
Read more about this topic: Australian Holographics
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