Optics: motion pictures – With film carried control signals
Patent
1974-02-08
1976-07-06
Adams, Jr., Russell E.
Optics: motion pictures
With film carried control signals
352 91R, 352236, G03B 2150
Patent
active
039678873
ABSTRACT:
A pair of signals optically different in consistency is placed on an image information recording film to be projected. A projector is provided with at least a pair of light detection elements in a position where signals may be detected. The difference between outputs from the elements is utilized as a detection signal. The above-described signals are detected by way of an ordinary speed of the film so as to automatically switch the projection mode thereof to other projection modes, such as a still projection mode, a slow motion projection mode, a fading projection mode, and still projection mode for the search and after the search. For this purpose there are provided with a control circuit for processing the output of the detection element and a drive mechanism for providing the respective projection mode in response to the output signal from the control circuit.
REFERENCES:
patent: 3664735 (1972-05-01), Metzger
patent: 3702728 (1972-11-01), Winkler et al.
patent: 3851959 (1974-12-01), Kreutze et al.
IBM Technical Disclosure Bulletin, vol. 11, No. 10, Mar. 1969 p. 1191.
Suzaki Kuniyoshi
Uchidoi Masanori
Adams, Jr. Russell E.
Canon Kabushiki Kaisha
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