Abstract: This invention relates to an optical assembly (10) with a laterally graded reflective multilayer whose reflecting surface reflects incident X-rays under low incidence angles producing a two-dimensional optical effect, characterized by the fact that said reflecting surface is comprised of a single surface, said reflecting surface being conformed along two curvatures corresponding to two different directions. This invention also relates to a manufacturing method of such an optical assembly, characterized in that the method includes the coating of a substrate already having a curvature, and the curvature of this substrate along a second different direction.

Abstract: One aspect of the invention relates to a multi-layered reflective optical system for the reflection of X rays at a low angle of incidence, producing a two-dimensional optical effect. The inventive optical system comprises: a component having a surface which is reflective in such a way that a first optical effect is produced according to a first direction in space; and means for producing a second optical effect according to a second direction in space which is different from the first direction, characterized in that said means for producing a second optical effect are borne by the reflective surface. A second aspect of the invention relates to a method for the production of said optical system.