| 摘要 |
307,351. Soc. Francaise Cinechromatique, ProcÚdes R. Berthon, (Assignees of Soc. Civile pour l'Etude, de la Photographie et de la Cinematographic en Couleurs). March 5, 1928, [Convention date]. Three-colour systems; optical-projection systems.-For the projection and reproduction of embossed photographic films, a powerfully illuminated surface A of the same shape as the emergent pupil of the taking objective is arranged with respect to a large aperture lens B so that its image is formed in be position C correspond. ing to the emergent pupil of the objective by which the film D, to be projected or reproduced, was taken. The film D is positioned so that its distance from the image C is the same as that when taken. In place of the diffusing surface A a transmitting diffusing surface may be employed. The rays passing througn the film D are thus at the same angle as originally in taking the photograph. |
