Patent ID: 10739623

Abstract:
The invention relates to a waveguide comprising a substrate (1) on which a layer stack (2) of at least two layer formations (3a, 3b) is arranged, each layer formation (3a, 3b) having at least one transparent dielectric layer (3a1, 3b2), in particular with a higher refractive index than the substrate (1). A structure which influences light propagation, in particular a structure (4) which extends in a layer-like manner, at least in some regions, is arranged between two adjacent layer formations (3a, 3b), the position of the structure (4) in the layer stack corresponding to a node position of a waveguide mode which can be guided in the waveguide and has at least one, preferably exactly one node (5a). The waveguide comprises at least one means for at least temporarily changing the position of the node (5a) of a guided waveguide mode and the structure (4) relative to each other. The invention also relates to a display consisting of at least one such waveguide and to a method for coupling light out of a waveguide, wherein the light is propagated as a waveguide mode with at least one node, the node position of which corresponds to the position, in the waveguide, of a structure influencing light propagation, and wherein the relative position of the node of the waveguide mode and the structure is at least temporarily shifted, in particular by shifting the node relative to the structure or by shifting the structure relative to the node.