Patent ID: 7192164

Claim:
A light-emitting apparatus comprising: a light-emitting element; a base body having a convexity formed on an upper principal surface thereof for emplacing the light-emitting element thereon; a reflection member disposed on the upper principal surface of the base body so as to surround the convexity, having an inner surface which is formed as a reflection surface for reflecting light emitted from the light-emitting element emplaced on the convexity; and a fluorescent material layer disposed on a top surface of the reflection member so as to cover the light-emitting element, with a spacing secured between the fluorescent material layer and the light-emitting element, the fluorescent material layer being composed of a light transmitting member that contains a fluorescent material for performing wavelength conversion on the light emitted from the light-emitting element, wherein a cross section of the inner surface of the reflection member cut by a virtual plane including a virtual axis penetrating a center of the inner surface and perpendicular to the upper principal surface of the base body has a sectional profile defined by a curved line expressed by the following formula, and the inner surface of the reflection member is a curved surface obtained by rotating the curved line about the virtual axis: Z =( cr 2 )/[1+{1−(1+ k ) c 2 r 2 } 1/2 ] (where −10≦ k≦− 0.001, 0.001≦ c≦ 10) where r represents a radius from the virtual axis to the inner surface; Z represents a height from a lowermost position of the inner surface to a position having a radius r of the inner surface, and wherein an angle θ 1 which is made by an upper surface of the fluorescent material layer and a line which connects one corner of a light-emitting portion of the light emitting element with an uppermost position of the inner surface and is tangent to the one corner, is given as: θ 1 ≧90°−sin −1 (1/ n 1 ) where n 1 represents a refractive index of the fluorescent material layer.