| 摘要 |
An apparatus for projecting hemispherical motion pictures includes a hemispherical screen truncated below its equator and a plurality of equidistantly spaced projectors positioned along the lower periphery of the screen. Each projector is positioned within a projection room having a projection window of generally triangular shape, and a mask is positioned over each window. Each mask has an opening which has substantially the same contour as the contour of the window but which is sized slightly smaller than the window to define a projection ray transmitting portion between the periphery of the projection window and the periphery of the mask opening.
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