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Filing date
Publication date
Application filed by Logetronics IncfiledCriticalLogetronics Inc
Publication of BE616229ApublicationCriticalpatent/BE616229A/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
G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
G03B3/10—Power-operated focusing
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Investigating Materials By The Use Of Optical Means Adapted For Particular Applications
(AREA)
BE616229A1961-04-101962-04-10Procédé et appareil de détermination du contraste d'image
BE616229A
(fr)