| 摘要 |
Images of two or more groups of pictures exposed onto a photosensitive record carrier in the presence of gratings are projected onto a screen by focusing all of the pictures into a focal plane which accommodates several adjustable diaphragms or analogous image selecting devices each blocking all but one image of the corresponding group. Mirrors or analogous optical deflecting components are used to project the unblocked images from the focal plane onto separate sections of a screen so that two or more images can be viewed simultaneously. |
