Light emitting device and wavelength conversion member

A light emitting device comprising:

• a laser light source configured to emit first light;
• a wavelength conversion member containing one kind of fluorescent material or a mixture of two or more kinds of fluorescent material, and configured to emit second light, the wavelength conversion member including
• an upper surface arranged to be irradiated with the first light, and
• a plurality of projected portions each extending along a first direction on an upper surface side of the wavelength conversion member and arranged side by side in a second direction perpendicular to the first direction, each of the plurality of projected portions having a first surface extending along the first direction, the first surface being inclined with respect to a reference surface on which bottoms of a plurality of grooves defined by the plurality of projected portions are arranged;
• and
• a reflection mechanism configured to reflect the first light emitted by the laser light source toward the wavelength conversion member,
• the laser light source and the wavelength conversion member being arranged so that the first light and the second light are extracted from the upper surface side of the wavelength conversion member, an optical axis of the first light extends along the second direction when viewed from above and is inclined with respect to the reference surface, and light directly incident to the first surface along a direction parallel to the optical axis of the first light is regularly reflected toward an upward direction.

A wavelength conversion member comprising:

• an upper surface;
• one kind of fluorescent material or a mixture of two or more kinds of fluorescent material;
• and
• a plurality of projected portions each extending along a first direction on an upper surface side of the wavelength conversion member and arranged side by side in a second direction perpendicular to the first direction, each of the plurality of projected portions having a first surface and a second surface, the first surface extending along the first direction and inclined with respect to a reference surface on which bottoms of a plurality of grooves defined by the plurality of projected portions are arranged, the second surface extending along the first direction when viewed from above and inclined with respect to the reference surface,
• the first surface being arranged so that light along the second direction when viewed from above and inclined with respect to the reference surface is regularly reflected toward an upward direction, and
• the first surface and the second surface of each of the plurality of projected portions being arranged so that light regularly reflected at the second surface of one of the plurality of projected portions is regularly reflected toward the upward direction at the first surface of an adjacent one of the plurality of projected portions.