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frames into position. At the minimum 16-frames-per-second silent film projection speed, this resulted in a minimum of 48 flashes per second per eye, eliminating the severe flicker that fatally flawed earlier systems in which the left-eye and right-eye frames alternated on a single strip of film projected at twice the normal rate.
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Left-eye and right-eye films were run through a pair of interlocked projectors with their shutters operating out of phase. Each shutter was three-bladed, so that each pair of film frames was projected three times (i.e., left-right-left-right-left-right) before the mechanisms moved the next pair of
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Each theater seat was equipped with an attached viewing device supported by a gooseneck stand. It contained a rotary shutter synchronized with the projector shutters, so that each of the user's eyes saw only the images intended for it.
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Hammond's system won praise, but because of the high cost of installing the equipment, and the inconvenience of having to peer through the unwieldy viewer, it disappeared completely after this lone engagement ended in early 1923.
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method of stereoscopic 3D projection. The basic principle had been patented as early as 1897, but the improved
Teleview implementation was the first to be presented to the public.
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made both views appear to be uninterrupted and a normal fully stereoscopic image was seen.
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are used for viewing projected 3D films in some theaters, as well as
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The alternating image method enjoyed a revival after the advent of
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Stereoscopic Cinema and the
Origins of 3-D Film, 1838-1952
160:"The Chopper," article about Teleview by Daniel L. Symmes
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Scientific
American, Vol 128, n1, page 5, January 1923
47:. It made its public debut on 27 December 1922 at the
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shutters in the 1970s made it more practical. Modern
173:Directory of 3D (Stereo) Motion Pictures 1922–2001
20:An illustration from a 1922 article about Teleview
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134:U.S. Patents 1,435,520, 1,506,524 and 1,658,439
147:, University Press of Kentucky, pp. 107-109.
107:video and stereoscopic computer graphics.
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65:), later re-released in 2D as
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37:stereoscopic motion pictures
35:was a system for projecting
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198:Motion picture film formats
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74:alternate-frame sequencing
72:Teleview pioneered the
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86:Persistence of vision
62:The Man From M.A.R.S.
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143:Zone, Ray (2007).
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166:Radio-Mania
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187:Categories
123:References
193:3D cinema
168:at IMDB
111:See also
57:M.A.R.S.
33:Teleview
105:3DTV
59:(or
51:in
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