Abstract:
A wavelength conversion device is provided that includes: light-transmissive substrate that includes an incidence surface and an emission surface opposite the incidence surface, and emits, from the emission surface, laser light that enters the incidence surface; a phosphor layer that emits fluorescent light when excited by the laser light emitted from the emission surface; and a light diffuser layer between the emission surface and the phosphor layer. The light diffuser layer is, when viewed in a direction perpendicular to the emission surface, disposed only in a portion of a region in which the phosphor layer is disposed.
Abstract:
A wavelength conversion member includes a substrate, a dichroic mirror layer, an SiO2 layer, a ZnO layer, and a phosphor layer, which are sequentially stacked from the substrate. The dichroic mirror layer reflects at least part of light incident from the above. The phosphor layer includes a plurality of phosphors and ZnO between the phosphors.
Abstract:
A wavelength converter includes, in sequence, a substrate, a reflective layer, and a phosphor layer. The phosphor layer contains a sealing layer and a phosphor dispersed in the sealing layer. The sealing layer is made of a hybrid material containing a glass component and a resin component.
Abstract:
A phosphor layer contains phosphor particles, and satisfies the following relations: y≥0.0623x2+0.2107x+28.789 and y≤−0.1172x2+7.584x+81.148 where x represents the average particle size (μm) of the phosphor particles, and y represents the thickness (μm) of the phosphor layer.