A phosphor emitting device using the phosphor and the optical element optical element

Phosphor of the present invention is an optical element, comprising: in the base member to the wavelength of incident light from the excitation light source is made of a transparent substrate (10) are sequentially formed (20), and the phosphor particles comprising (32) a transparent member (31) constituting the phosphor-containing part (30), and a cover member (40), the phosphor particles (32) of the particle diameter of the wavelength of incident light, the phosphor-containing part (30) in perpendicular to the transparent substrate (10) in the main surface direction by an arbitrary cross section of the section line formed on the main surface of the transparent substrate (10) in the direction perpendicular to the phosphor-containing part (30 ) thickness, wavelength of incident light or less.