Problem to be solved: to provide an ultraviolet irradiation apparatus with high irradiation efficiency of ultraviolet rays.An ultraviolet ray generating portion using an ultraviolet LED as a light source, an ultraviolet ray introduction window including an ultraviolet ray transmitting member, and a support for supporting the ultraviolet ray introduction window, and the light extraction surface of the ultraviolet ray generating portion and the light introduction surface of the ultraviolet ray introduction window are bonded via a refractive index relaxation layer, and ultraviolet rays Irradiation equipment.No selection【課題】紫外線の照射効率が高い紫外線照射装置を提供すること。【解決手段】 紫外ＬＥＤを光源とする紫外線発生部と、紫外線透過性部材を含む紫外線導入窓と、前記紫外線導入窓を支える支持体と、を備え、前記紫外線発生部の光取り出し面と前記紫外線導入窓の光導入面とが、屈折率緩和層を介して接合する、紫外線照射装置。【選択図】 なし
