Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Logetronics Inc
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Logetronics Inc
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Publication date
Application filed by Logetronics IncfiledCriticalLogetronics Inc
Application grantedgrantedCritical
Publication of FR1210754ApublicationCriticalpatent/FR1210754A/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
G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
G03B27/725—Optical projection devices wherein the contrast is controlled electrically (e.g. cathode ray tube masking)
Landscapes
Physics & Mathematics
(AREA)
Spectroscopy & Molecular Physics
(AREA)
General Physics & Mathematics
(AREA)
FR1210754D1957-06-171958-06-17Procédé de tirage d'épreuves photographiques
ExpiredFR1210754A
(fr)