Multi-layer body

Abstract

The invention concerns a multi-layer body (7) having a carrier substrate (750) and a transparent layer (720) at least partially arranged in a window (70) or in a transparent region of the carrier substrate (750). The transparent layer (720) has at least a first subregion (71a) and a second subregion (71b) with a varying refractive index, which are arranged in mutually juxtaposed relationship in the layer plane defined by the transparent layer (720), and are at least partially arranged in the window (70) or in the transparent region of the carrier substrate (750). Each of the subregions (71a, 71b) has a plurality of periodically arranged nodes which form an optical-action element and which are formed by a refractive index variation and which are arranged in substantially mutually parallel planes. The planes in the at least first subregion (71a) are not parallel to the planes in the at least second subregion (71b). At least in one of the subregions (71a, 71b) the planes extend neither parallel nor perpendicular to the layer plane. In that way both the light incident on the front side and on the rear side of the multi-layer body (7) is diffracted by the optical-action elements and the elements produce an optical effect which is different in the front view and in the rear view in the incident light mode.

Dependencies are inferred from the claim text.