| 摘要 |
PURPOSE:To prevent false lighting and obtain a light distribution pattern of a sufficient illuminance by forming a diffusion step having an optical axis parallel to a radiation axis in a range corresponding to a light transmitting part, and cutting the side edge part of a protruding part for separating a light shielding part from the light transmitting part in such a direction as to diffuse an outgoing light axially. CONSTITUTION:A light L coming in from outside through a light transmitting part 58 into a lamp reflected at a reflector 26 to be incident on a lens 50, but it is shielded by a light shielding part 52 to be prevented from going out of the lens 50. False lighting can thus be prevented. Upper and lower side edge parts 54a, 54b of a protruding part 54 for separating the light shielding part 52 from the light transmitting part 58 formed on the surface of the lens are cut longitudinally in such a direction as to diffuse the light outgoing from the light transmitting part 58. This means that the outgoing light from the light transmitting part 58 is diffused by light collection action of a fisheye step element 60, but the side edge parts of the protruding part 54 are cut for preventing the diffused light outgoing from the light transmitting part 58 from shading. |
