| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rectangular light emitting part which is improved in the unevenness of luminance, and uniformly (or substantially uniformly) emits light, in a vehicle headlamp using an optical fiber.SOLUTION: A vehicle headlamp comprises: a laser light source 12; an optical fiber 14 which includes a core 22 including an incident end face 22a to which laser light from the laser light source 12 is made incident, and an emission end face 22b from which the laser light introduced from the incident end face 22a is emitted, and a clad 24 which surrounds the periphery of the core 22; a wavelength conversion member 16 which receives the laser light emitted from the emission end face 22b, and converts at least a part of the laser light to light having a wavelength different from that of the laser light; and an optical system which is constituted so as to form a prescribed light distribution pattern by projecting a light source image of the wavelength conversion member 16. The wavelength conversion member 16 is arranged at the emission end face 22b, and the core 22 is constituted as a core whose cross section vertical to a fiber axis is rectangular or substantially rectangular. |
