Lamp unit for vehicular headlamp

摘要

A lamp unit for a vehicular headlamp includes: a projection lens (12) provided in an optical axis (L); a light-emitting element (14) provided on a rear side with respect to a rear focal point (F) of the projection lens (12); and a reflector (16) that is arranged to cover the light-emitting element (14) and that reflects light irradiated from the light-emitting element (14) toward the projection lens (12). The reflector (16) has an elliptical shape in longitudinal section. The elliptical shape has a first focal point (f1) at a center of light emission of the light-emitting element (14) and a second focal point (f2) at the rear focal point (F) of the projection lens (12). The reflector (16) is arranged so that a major axis (X) of the elliptical shape is inclined with respect to the optical axis (L).