Light-emitting device, vehicle headlamp and illumination apparatus

摘要

A headlamp includes the laser chip which emits excitation light, a light-emitting section which contains a phosphor, and an optical rod. The excitation light emitted from the laser chip is optically guided by the optical rod, and the light output from the optical rod enters the light-emitting section. An edge is present in the light intensity distribution of the light-emitting section.

主权项

1. A light-emitting device comprising:
a light-emitting element which emits excitation light; a light-emitting section containing a phosphor; and an asymmetrical optical guide member comprising a light exiting end that forms a light beam having a predetermined edge in a cross-section thereof, wherein the excitation light emitted from the light-emitting element is optically guided by the optical guide member, the light beam output from the optical guide member enters the light-emitting section, the edge of the light beam output from the optical guide member is projected onto the light emitting section so that an edge is present in a light intensity distribution of the light-emitting section, and a light beam emitted from the light-emitting section has an edge in a cross-section thereof, which coincides with the edge of the light beam output from the optical guide member.