Headlamp, particularly antidazzle headlamp for motor vehicles

Claim 1

A headlamp, particularly an antidazzle headlamp for motor vehicles, having a reflector in the form of a rotational paraboloid defining a center axis and a focal point on the center axis; a coiled up incandescent filament defining a longitudinal axis extending in horizontal direction at right angles to the center axis of the reflector and having a center point situated off said focal point; a transparent disc arranged in the path of a light beam reflected from the reflector; optical means provided in the range of the transparent disc to transform the emitted light beam into an antidazzle light beam extending along an axis of propagation; said optical means including a set of diametrically opposed refracting portions I through III and I' through III' arranged with respect to a vertical coordinate V and to a horizontal coordinate H intersecting each other and said center axis of the reflector at right angles, and viewed in direction of propagation of the light beam, as follows: the portion I of the optical means is substantially to the right of V and above of H, the portion I' being substantially to the left of V and below H, the portions I and I' of the optical means being designed such as to refract a partial light beam without any sharp contrast at the envelope; of the partial light beam; the portion III is to the right of the portions I and I', the portion III' is to the left of the portions I and I', both portions III, III' extending at both sides of the corresponding part of H and refracting the light rays in vertical and horizontal direction; and the portion II is to the left of the portion I and above the portion III', the portion II' is to the right of the portion I' and below the portion III, and portions II, II' of the optical means refracting the light rays in vertical and horizontal directions.