| 摘要 |
The invention relates to a headlamp, the envelope of which is constituted internally by concave reflecting surfaces but at least by one concave reflecting surface having the shape of a paraboloid of rotation, further, in the focus of said paraboloid-shape reflecting surface a light-emitting element is accommodated with its center line being perpendicular to the axis of the reflecting surface, further, having said envelope shut up with a transparent cover plate, the surface of which is uniformly roughened, and/or on said surface uniformly distributed, geometrically regular beam-forming optical elememts are provided. Essential feature of the invention consists of having over the cover plate (1) also irregularly-shaped oblong beam-forming optical elements, the longitudinal axes of which are parallel with the center line (10) of the light-emitting element (2). Said oblong beam-forming optical elements are expediently cylindrical lenses (5, 6, 7, 8) or prisms.
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