Patent ID: 8662691
Filing Date: 2014-03-04
Classification: F21S

Abstract:
1. A light-emitting device comprising: a fluorescent plate having a first surface and a second surface opposite to the first surface and configured to emit fluorescent light by laser irradiation; a first laser light source disposed such that the first surface of the fluorescent plate is irradiated with first laser light during operation of the first laser light source; a second laser light source disposed such that the second surface of the fluorescent plate is irradiated with second laser light during operation of the second laser light source; a reflector having a light passing hole through which the second laser light passes during operation of the second laser light source, and a concave reflecting surface configured to cover an irradiation region with the second laser light at least on the fluorescent plate; and a lens disposed closer to the first surface than the second surface of the fluorescent plate, the lens configured to collect reflected light of the first laser light off the first surface of the fluorescent plate and fluorescent light emitted from the fluorescent plate excited by the first laser light and the second laser light.