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
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/10—Projectors with built-in or built-on screen
Systeme de projection d'une image diapositive sur ecran depoli et perle de grand format, pour visualisation de chaque cote de l'ecran, de jour comme de nuit.
Dispositif optique de visualisation d'images a 3 dimensions visibles en relief naturel en avant d'un ecran, sans lunettes particulieres ou protheses