ISO 1780-1984 Cinematography Motion-picture camera cartridge 8 mm Type S Model I Aperture camera aperture profile film position pressure pad and pressure pad fl.pdf

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1、Norme internationale INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME)I(AYHAPOAHAR OP!-AHM3AL figure 3; note 2.) 6 ISO 1780-1984 (FI Annexe Donnes supplmentaires (Cette annexe fait partie intgrante de la norme.) A.1 Une force de 22 3,9 N (8 14 ozf) doit tre exerce sur le presseur pour assurer un ap

2、pui correct sur le couloir de la camra. A.2 Les deuxchancrures pratiques dans le presseur per- mettent lutilisation de guides latraux. Une force de 0,42 0,70 N (1,5 2,5 ozf) exerce par chaque guide est suffisante pour assurer la stabilit de limage. A.3 Dautres parties de la surface frontale du press

3、eur peu- vent apparatre en creux en plus de celles exiges pour le pas- sage de la griffe de la camra et la pntration du guide de cen- trage du film, comme dfini en 3.6, par la dimension C. A.4 Lencoche latrale du presseur, dfinie par les dimen- sions D, E et J, est prvue pour la pntration de la grif

4、fe dentranement dans la perforation du film. La perforation utili- se pour assurer la fixit verticale du film sa position darrt est spcifie dans IISO 1787 comme devant tre la deuxime au-dessus de la perforation adjacente limage forme par la fentre de la camra. Laxe horizontal de la fentre de la camr

5、a doit nominalement coincider avec le plan de rfrence A. A.5 De manire fournir une mthode de mesurage coh- rente, il est recommand dutiliser un gabarit dessai du char- geur comprenant les surfaces de rfrence, un ergot de posi- tionnement et un dispositif permettant dexercer les forces de positionnement sur les surfaces appropries du chargeur. Pour les mesures du presseur il est recommand dutiliser un second gabarit, incorporant trois bossages de diamtre 1,52 mm (0,060 in) et des moyens pour exercer la force dappui appro- prie sur le presseur. 7 Page blanche Page blanche Page blanche

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