System for reproducing three-dimensional, that is four-dimensional, images and, particularly moving images by projection, without the use of coherent light

Abstract

System capable of reproducing high quality moving three-dimensional images with a non limited orthoscopic viewing angle consisting of the projection of several images PR.sub.1. PR.sub.2 . . . PRn, taken from several different spatial positions onto a transparent optical system; this transparent optical system is composed, in its front part, of an optical sheet of vertical cylinders (1) of small enough transverse dimensions so as to be imperceptible, such that the relationship between its transverse dimensions d and its focal length f is at least greater than the value obtained when dividing the distance between two adjacent projectors K.sub.R by the projection distance B and less than twice this value and in which its rear part has an optical sheet of horizontal cylinders 2, of transverse dimensions small enough so as to be imperceptible and of a semicircular cross-section or of an arc of a circle of sufficiently small radius, so as to allow all the observers to see the image in its full height; the thickness e of the optical system has to be such that the focal lines of these horizontal cylinders are on the same plane as that which contains the focal lines of the vertical cylinders.

Dependencies are inferred from the claim text.