| 摘要 |
PCT No. PCT/SE88/00534 Sec. 371 Date Jun. 16, 1989 Sec. 102(e) Date Jun. 16, 1989 PCT Filed Oct. 13, 1988 PCT Pub. No. WO89/03778 PCT Pub. Date May 5, 1989.A vehicle headlamp comprises a reflector and a headlamp glass constructed to produce a so-called full beam lobe when a light source is located in a predetermined position in relation to the reflector. The invention is characterized in that the light source (11) is constructed to transmit both a large proportion of visible light and a large proportion of ultraviolet light, and in that a filter (19; 22; 23) is located in the beam path of the headlamp and is effective in filtering that part of the light emitted by the light source (11) which gives rise to a light lobe corresponding to the difference between a so-called full beam lobe and a so-called dipped beam lobe. The headlamp is further characterized in that the filter (19; 22; 23) is constructed firstly to filter light so that substantially no light within the visible light spectrum will be transmitted through the filter, and secondly to transmit ultraviolet light. |
