Patent ID: 8154586

Claim:
A curved film projection system, comprising: a rendering surface; a projection screen; a real scene rendering model of image system; a rendering model of projection system that renders the projection the image rendered by the rendering model of image system on the rendering surface; and a projecting device that projects the image finally rendered by the rendering model of projection system onto the projection screen through optical lens, wherein said projection screen is regarded as a first surface or part of said first surface, wherein said rendering surface is regarded as a second surface or part of said second surface, wherein first surface is behind said second surface, and watching from observer's eyes to projection screen, wherein a viewing direction and angle from observer's eyes to the rendering surface is consistent with that to said projection screen, wherein a viewing direction and angle from observer's eyes to said rendering surface is consistent with that to said screen, wherein said image system rendering model is reversible with said projection system model, wherein said rendered real scene by said projection system rendering model is projected to said second surface and then to said projection screen through said projecting device, exactly restore the distorted image produced by the image system rendering model, wherein said projection device is arranged to set a spherical surface, take the vertical section of the sphere, which is round in shape, the said vertical axis of the section is OZ, divide horizontal viewing field 0°˜180° of the section into n parts, indicate the n viewing directions with radial OA 1 ˜OAn, divide the said semicircle diameter evenly into n parts with section points as P 0 , P 1 , P 2 . . . Pn- 1 and Pn, draw n lines as L 1 , L 2 , L 3 . . . Ln- 1 and Ln paralleled to OZ axis cross the said n section points, then followed with in turn M 1 , intersection point of OA 1 and L 1 , M 2 , intersection point of OA 2 and L 2 , M 3 , intersection point of OA 3 and L 3 . . . Mn- 1 , intersection point of OAn- 1 and Ln- 1 , Mn, intersection point of OAn and Ln, connect M 0 , M 1 , M 2 . . . Mn- 1 and Mn to get a curve K, rotate curve K 360° around OZ axis to get curved surface B, the said second surface is curved surface B.