| 摘要 |
A motor vehicle headlamp comprises a light source of predetermined geometry, and a reflector associated with the light source. The reflector is made by a method that includes the steps of:(a) establishing a reflective base surface having a reference focus and giving a predetermined distribution of the light emitted by a light source having a given geometry and a given position with respect to the reference focus, mainly in the vertical direction,(b) in at least one zone, determining a line passing through all of the points that give the same predetermined horizontal deviation of a theoretical radiation propagated from the reference focus,(c) modifying the base surface so as to put on it, substantially along the line determined in step (b), a striation for horizontal diffusion of the light,(d) making a mould in conformity with this modified surface, and(e) moulding the reflector in this mould.
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