Stereoscopic motion picture large scale scanning reproduction method and apparatus

摘要

The invention involves theatre size stereoscopic motion pictures without glasses and without restricted viewing zones and which can be photographed with a standard motion picture camera. Relative lateral motion is required between the camera and the scene. The film is run horizontally through a scan projector in which a given scene on the screen is constructed from several adjacent scenes on the film. The scanned stereoscopic picture can be viewed from different perspectives. A central 3-facet scanning projector of small mass and radius projects over a 120 DEG sector onto triangular elemental mirror scanners causing the node of the image of the projection lens to sweep a large radius about the projector center. From the scanner the sweeping optical axis of the projector passes through the rotation axis where the picture is imaged onto a concentric semi-specular screen. Three vertical concentrically moving aerial viewing slits are generated 120 DEG apart and at one-third screen radius and rotate in the same direction as the scanning projector node image giving a picture repetition rate of 48 Hz. The audience views the stereoscopic picture as constructed of vertical slices of several pictures generated from the horizontally moving vertical aerial slits.