We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
26
THE CINE-TECHNICIAN
March-April, 1953
CINE'S ROUND-UP ON 3-D
Great interest has been aroused in Britain by the news that several U. S. film companies are turning over to 3-D films.
'Cine'' presents here a digest of descriptions of the main 3-D systems in use, compiled from descriptions provided by our fellow film technicians in the U.S.
Our thanks to them all. and to IATSE, the Trades Union Workers in the American Film Industry.
CMNERAMA, unlike conventional A stereo-opticon techniques, does not rely on optical tricks or tromp< I'oeil devices to create the illusion of reality. Instead of attempting to deceive the human eye, it recreates as accurately as is technologically possible what the eye actually sees and the ear actually registers by reproducing on film virtually the entire range of human vision and hearing. To do this, it employs a special camera with three lenses of 27mm. focal length, set 48 degrees apart, each with its own magazine of 35mm. film and each recording in perfeel synchronisation a third of the scene being shot. These three films ate then simultaneously projected on a huge concave screen by three projectors, with the one on the left filling the right third of the screen, the one on the right filling the i, it side and the one in the centre directly straight ahead. The result is an image not only three times as wide a that of an ordinary motion picture but,
>1ST
DIAGRAM shows course of a Cinerama film production from camera t<> )>r,,jfcti<»i. At bottom, seme is photographed with three-lensed camera, which records scene on three separati 35mm. films. In projection, films are screened by three projector^ — one in centn and one at each .side The three film images becomi ont on tin largi horizontal curved screen, and give tht illusion of multi-dimensional reality without recourse to Polaroid spectacles. Stereophonic sound is recorded magnetically through five or mort mikes, which product a multiple sound track. Tins is reproduced through a like number of speakers which surround the screen
because Cinerama uses a six rather than foursprocket frame, half again as high. Altogether the Cinerama screen is 5] feet wide by 26 feet high, with an area almost six times that of a standard movie screen.
It is not size alone, however, or the curvatun of the screen that provides the illusion of reality, inn the fact that Cinerama duplicates in a theatn the " peripheral vision" of the human eye. Scienc