Wavelength conversion member and a light emitting device using the same

PROBLEM TO BE SOLVED: To provide a wavelength conversion member further improving incident efficiency of exciting light into a fluorescent particle and extraction efficiency of converted light from the fluorescent particle; and to provide a light-emitting device using the member. SOLUTION: The wavelength conversion member 70 includes an antireflection section 76 composed of: a moss eye-like structure 74 having minute concavo-convex structure on the surface-side of the fluorescent particle 71; and a translucent medium 73 intruding into tapering gaps between fine protrusions 75 of the moss eye-like structure 74. The individual fine protrusions 75 of the moss eye-like structure 74 are formed by combining fine particles 72 smaller in particle diameter than the fluorescent particle 71 and larger in refractive index than the translucent medium 73 with the fluorescent particles 71 on the surface-side of the fluorescent particle 71. When the refractive index n 2 of the fine particle 72 is made the same as the refractive index n 1 of the fluorescent particle 71, effective refractive index of the antireflection section 76 varies continuously between the refractive index n 1 of the fluorescent particle 71 and the refractive index n 3 of the translucent medium 73, in the normal direction of the surface of the fluorescent particle 71, as shown in Figure (d). COPYRIGHT: (C)2010,JPO&INPIT