LUMINAIRE

To provide a luminaire capable of increasing central luminous intensity of light.SOLUTION: A luminaire includes; a lens including an incident surface in which the shape viewed along an optical axis is formed as a circular shape; a light source in which the center is arranged on the optical axis of the lens; and a reflector which has a reflection surface constituted as a cylindrical shape, in which the reflection surface is arranged coaxially with the optical axis at the position between the light source and the lens, which has an incident port opening to the light source side and a circular emission port around the optical axis opening to the lens side, and in which, when a focal distance of the lens is defined as L, a distance from the light source to the emission port along the optical axis is defined as A and a diameter of the incident surface is defined as H, a diameter of the emission port is D≥(A×H)/L.SELECTED DRAWING: Figure 4 【課題】、光の中心光度を高くすることが可能な照明装置を提供すること。【解決手段】 実施形態によれば、照明装置は、光軸に沿って見た形状が円に構成された入射面を具備したレンズと；前記レンズの前記光軸上に中心が配置された光源と；筒状に構成された反射面を有し、前記光源と前記レンズとの間の位置で前記反射面が前記光軸と同軸的に配置され、前記光源側に開口する入射口、及び前記レンズ側に開口する前記光軸を中心とする円形の出射口を有し、かつ、前記レンズの焦点距離をＬとし、前記光源から前記光軸に沿って前記出射口までの距離をＡとし、前記入射面の直径をＨとすると、前記出射口の直径ＤはＤ≧(Ａ×Ｈ)／Ｌである、反射器と；を備える。【選択図】 図４