| 摘要 |
A low-beam headlight element (600) comprises a lens (301, 401, 501) for modifying the distribution pattern of light penetrating the lens (301, 401, 501), and a reflector element (302, 502) comprising a first end having a place for a light source (307) and a second end having an opening constituting a passage for the light penetrating the lens (301, 401, 501). The thickness of the lens (301, 401, 501) is shaped to decrease more strongly towards a first edge (303) of the lens than towards an opposite second edge (204) of lens (301, 401, 501) so as to provide more refractivity on a first area (205) of the lens (301, 401, 501) abutting on the first edge (303) than on a second area (206) of the lens (301, 401, 501) abutting on the second edge (204). The refractivity on the first area (205) produces a cutoff line (311, 411, 511) in a resulting light distribution pattern. Hence, for achieving a cutoff line (311, 411, 511) meandering in a desired way, there is no need for a screen element which converts light into heat. |
