Optical device of an automobile performing a plurality of functions.

The device (1) has an elliptical optical module (2) i.e. elliptical projection module, comprising a lens (10) provided with a base (12) and an active part (14) that is traversed by light rays emitted by a main light source (3) e.g. LED or discharge lamp, of the module. An annular optical module (17) comprises an auxiliary light source (6) that is arranged relative to the lens such that light rays emitted by the auxiliary light source traverse the base of the lens, where the auxiliary light source has a surface light source i.e. organic LED (9), that is arranged on a glass slide.