Patent ID: 9223071
Filing Date: 2015-12-29
Classification: F21S,G02B

Abstract:
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.