Projector-type headlight for vehicles

The device has a projection module (3) with a lens enclosed by an annular stop (11) mounted on the module and formed by a spherical casing surface section whose center point (12) is near the intersection point of the vertical axis and the optical axis (14) of the module. The edge of a through opening (16) in the cover panel (15) associated with the lens bounds a peripheral gap (17) with the annular stop.