An optical module for motor vehicle including at least one light source capable of emitting an initial light beam and a primary optical means capable of receiving the initial light beam and having a cutoff member arranged to transform the initial light beam into a secondary light beam oriented in a longitudinal direction and exhibiting a predetermined bottom cutoff extending overall transversely. A projection means is arranged to project a final light beam exhibiting a top cutoff formed by an inverted image of the secondary light beam with cutoff, wherein the primary optical means has a light deflection member arranged to deflect a part of the light rays of the initial light beam below the cutoff of the secondary beam toward the projection means.