Lamp with filament segments in curved layers

The invention relates to an incandescent lamp comprising a filament formed by a plurality of filament segments, each segment consisting of a straight spiral section, said segments being mutually parallel and arranged in several layers. An incandescent lamp has a filament formed by a plurality of filament segments. Each segment is formed by a straight coil section. The segments are mutually parallel and arranged in several layers. A first layer of filament segments is arranged along a first curved surface, and a second layer of filament segments is arranged along a second curved surface. The two curved surfaces are symmetrical with respect to a plane.