Signalling light, in particular for an automobile

Signaling light for an automobile, comprising:

• (a) a light source comprising a bulb and a filament;
• (b) a concave mirror having an optical axis and a focus on the optical axis;
• the mirror having an apex and an opening formed therein, comprising:
• i) a first reflector having an internal surface of revolution about the optical axis spanning the circumference of the opening at the apex of the mirror, the internal surface of revolution having a convergent meridian comprising an arc of a conic section having a geometric axis inclined by an angle with respect to the optical axis, the filament being disposed at or in the vicinity of the focus and the first reflector being convergent and enveloping with respect to the light source;
• and
• ii) a second reflector in the form of a concentric ring having an inner edge extending along the opening at the apex of the mirror and an outer edge coupled to the first reflector along an intersection line, the second reflector having an internal surface of revolution about the optical axis, the internal surface of revolution having a meridian comprising an arc of a parabola having a geometric axis is parallel to the optical axis;
• and
• (c) a lens disposed in front of the light source, which alters the direction of the light rays reflected from the mirror, the lens comprising a disc of transparent material defining a plane disposed orthogonal to the optical axis and centered on the optical axis, a face of the disc comprising prisms or blocks which refract the light rays.