Optics: motion pictures – With sound accompaniment – Picture and sound synchronizing
Patent
1977-04-26
1980-06-10
Hayes, Monroe H.
Optics: motion pictures
With sound accompaniment
Picture and sound synchronizing
352194, 352159, G03B 3100
Patent
active
042069815
ABSTRACT:
A telecine projector includes film supply and take-up means; a film constant-speed drive means for advancing the film at an arbitrary predetermined constant speed past a magnetic transducer; a shutter for intermittently illuminating the film at a predetermined constant rate; intermittent film advancing means for advancing the film past the shutter; a film slack detecting means for detecting whether slack in the film between the film advancing means and the film constant drive means exceeds a predetermined amount; and control means for controlling the advancing operation of the film advancing means in accordance with the output of the film slack detecting means. The film can be intermittently advanced in accordance with a film running speed which is arbitrarily predetermined while the shutter operates at the video field frequency. Fast motion reproduction and slow motion reproduction are possible. A guide is provided to prevent the film slack detecting means from falsely indicating an excess of slack upon the occurrence of a splice in the film.
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Ohta Shuichi
Ozaki Yoshio
Eslinger Lewis H.
Hayes Monroe H.
Sinderbrand Alvin
Sony Corporation
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