FR838955A - Dispositif de réglage impératif de la distance principale d'objet et d'image d'un objectif d'appareil photographique avec trajet coudé des rayons
- Google Patents
Dispositif de réglage impératif de la distance principale d'objet et d'image d'un objectif d'appareil photographique avec trajet coudé des rayons
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Firma Wenczler and Heidenhain
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Firma Wenczler and Heidenhain
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Application filed by Firma Wenczler and HeidenhainfiledCriticalFirma Wenczler and Heidenhain
Application grantedgrantedCritical
Publication of FR838955ApublicationCriticalpatent/FR838955A/fr
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B27/00—Photographic printing apparatus
G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
G03B27/34—Means for automatic focusing therefor
G03B27/36—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage
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Physics & Mathematics
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General Physics & Mathematics
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FR838955D1937-06-081938-06-07Dispositif de réglage impératif de la distance principale d'objet et d'image d'un objectif d'appareil photographique avec trajet coudé des rayons
ExpiredFR838955A
(fr)
Dispositif de réglage impératif de la distance principale d'objet et d'image d'un objectif d'appareil photographique avec trajet coudé des rayons