Multichannel optical device

摘要

An optical device including: a substrate which defines a plane; and a plurality of optical elements corresponding to structures projecting from and/or into the substrate, wherein the plurality of optical elements are configured to provide three or more different images, each image associated with a unique viewing direction, when viewed from a particular viewing position when the optical device is rotated about a rotational axis projecting from the plane, and method for the manufacture thereof.