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
G03B35/00—Stereoscopic photography
G03B35/18—Stereoscopic photography by simultaneous viewing
G03B35/20—Stereoscopic photography by simultaneous viewing using two or more projectors
Appareil photo-mécanique à contact permettant de réaliser à partir d'originaux photographiques normaux des copies modifiées de caractère circulaire