Transparent layered element having a specular transmission and a diffuse reflection of radiation incident thereon

A transparent layered element having two smooth outer main surfaces and comprising:

• two outer layers, which each have a smooth outer main surface and which are constituted of dielectric materials having substantially the same refractive index;
• and
• a central layer inserted between the outer layers, the central layer being formed either by a single layer made of metallic material or made of dielectric material having a refractive index different from that of the outer layers, or by a stack of layers which comprises at least one layer made of metallic material or made of dielectric material having a refractive index different from that of the outer layers,
• wherein all contact surfaces between two adjacent layers of the layered element which are one made of metallic material and the other made of dielectric material, or which are two layers made of dielectric materials having different refractive indices, are textured and parallel to one another,
• wherein a ratio of a total reflection of the layered element on a side of a first outer layer of the two outer layers in a given wavelength range to a total reflection of the layered element on a side of a second outer layer of the two outer layers in said given wavelength range is greater than or equal to 1.5.