Patent ID: 8369375

Claim:
A semiconductor light-emitting device comprising: a package having a light outlet; a semiconductor laser diode disposed in the package and radiating a light having a first wavelength falling within a range of ultraviolet ray to visible light; and a visible-light-emitter containing a phosphor which absorbs a light radiated from the semiconductor laser diode and emits a visible light having a second wavelength differing from the first wavelength, said visible-light-emitter being disposed on an optical path of the laser diode and a peripheral edge of the visible-light-emitter being in contact with the package, wherein the visible-light-emitter has a contour of a rectangular configuration, a polygonal configuration or an elliptical configuration, each having an aspect ratio of not less than 2:1, and a longer axis of a cross-sectional shape of a light emitted from the laser diode is the same in direction with a longer axis of the contour of the visible-light-emitter.