Vehicular headlamp
A vehicular headlamp includes a plurality of excitation light sources; a fluorescent body; a scanning mechanism configured to perform scanning by directing lights emitted from the excitation light sources toward the fluorescent body; and a projection lens through which the lights emitted from the fluorescent body pass such that a light distribution pattern is formed. Irradiation areas of the lights emitted from the excitation light sources and incident on the fluorescent body are different from each other.
1. A vehicular headlamp comprising:
a plurality of excitation light sources;
a fluorescent body;
a scanning mechanism configured to perform scanning by directing lights emitted from the excitation light sources toward the fluorescent body; and
a projection lens through which the lights emitted from the fluorescent body pass such that a light distribution pattern is formed, wherein
sizes of light images, formed by the lights emitted from the excitation light sources and incident on the fluorescent body, are different from each other.
2. The vehicular headlamp according to claim 1 , wherein:
a lens array is provided between the excitation light sources and the scanning mechanism, the lens array including a plurality of light condensing parts disposed so as to face the excitation light sources, respectively; and
the light condensing parts have light condensing magnifications different from each other.
3. The vehicular headlamp according to claim 1 , wherein:
a lens array is provided between the excitation light sources and the scanning mechanism, the lens array including a plurality of light condensing parts disposed so as to face the excitation light sources, respectively; and
the light condensing parts and the excitation light sources are disposed such that distances from the light condensing parts to the excitation light sources facing the light condensing parts, respectively, are different from each other.
4. The vehicular headlamp according to claim 3 , wherein:
each of the light condensing parts is configured to move with respect to a corresponding one of the excitation light sources facing the light condensing part such that the distance from the light condensing part to the corresponding one of the excitation light sources is changed, or each of the excitation light sources is configured to move with respect to a corresponding one of the light condensing parts facing the excitation light source such that the distance from the excitation light source to the corresponding one of the light condensing parts is changed.
5. The vehicular headlamp according to claim 1 , wherein light emitting parts of the excitation light sources have shapes different from each other.
6. The vehicular headlamp according to claim 1 , wherein the scanning mechanism includes a reflecting portion configured to reflect the lights emitted from the excitation light sources toward the fluorescent body.
7. The vehicular headlamp according to claim 1 , wherein a plurality of the scanning mechanisms are provided, and each of the scanning mechanisms includes a reflecting portion configured to reflect the light emitted from a corresponding one of the excitation light sources toward the fluorescent body.
8. The vehicular headlamp according to claim 7 , wherein:
a plurality of condenser lenses are provided such that each of the condenser lenses faces a corresponding one of the excitation light sources, and is disposed between the corresponding one of the excitation light sources and a corresponding one of the reflecting portions; and
the condenser lenses have light condensing magnifications different from each other.
9. The vehicular headlamp according to claim 7 , wherein incidence angles of the lights emitted from the excitation light sources and incident on the reflecting portions are different from each other.