Light-emitting device
View Patent ↗A light-emitting device includes a light-emitting portion that emits fluorescence in response to excitation light incident on a surface of the light-emitting portion, and a reflector that defines a light-emitting region on the surface of the light-emitting portion, the fluorescence being emitted from the light-emitting region. The excitation light has a top-hat energy intensity distribution on the surface of the light-emitting portion.
1. A light-emitting device comprising:
a light-emitting portion that emits fluorescence in response to excitation light incident on a surface of the light-emitting portion; and
a light-emitting-region defining portion that defines a light-emitting region on the surface of the light-emitting portion, the fluorescence being emitted from the light-emitting region,
wherein the excitation light has a top-hat energy intensity distribution on the surface of the light-emitting portion, and
the light-emitting-region defining portion includes a blocking portion that prevents the fluorescence from being emitted from a side surface of the light-emitting portion.
2. The light-emitting device according to claim 1 , further comprising:
an excitation light source that emits the excitation light;
a light guide that guides the excitation light from the excitation light source to the light-emitting portion; and
an optical member that focuses an image of the excitation light guided by the light guide on the surface of the light-emitting portion, the image being an image existing at an emission end face of the light guide.
3. A light-emitting device comprising:
a light-emitting portion that emits fluorescence in response to excitation light incident on a surface of the light-emitting portion; and
a light-emitting-region defining portion that defines a light-emitting region on the surface of the light-emitting portion, the fluorescence being emitted from the light-emitting region,
wherein the excitation light has a top-hat energy intensity distribution on the surface of the light-emitting portion, and
the light-emitting-region defining portion covers a portion of the surface of the light-emitting portion, and the excitation light would be incident on the covered portion of the surface of the light-emitting portion absent the light-emitting-region defining portion.
4. A light-emitting device comprising:
a light-emitting portion that emits fluorescence in response to excitation light incident on a surface of the light-emitting portion; and
a light-emitting-region defining portion that defines a light-emitting region on the surface of the light-emitting portion, the fluorescence being emitted from the light-emitting region,
wherein the excitation light has a top-hat energy intensity distribution on the surface of the light-emitting portion, and
the light-emitting-region defining portion is a groove formed in a region outside the light-emitting region.