LIGHTING DEVICE

PROBLEM TO BE SOLVED: To provide a lighting device 1 capable of reducing a light condensing body even when a light emitting body having a large light emitting part is used.SOLUTION: The lighting device has: a light emitting element 3a; a mounting board 3b on which the light emitting element 3a is mounted; a power supply circuit for supplying a predetermined power to the mounting board; and a light condensing body 2 for condensing the light emitted from the light emitting element 3a. The light condensing body 2 can reduce the size of the light condensing body, even when a light emitting body having a large light emitting part is used, by having: a first incident surface 2b having a convex lens shape; a second incident surface 2c having a substantially cylindrical shape; a minimum inner diameter smaller than the maximum outer shape of a light emitting surface 3c of the light emitting element 3a; a third incident surface having the maximum outer diameter; a second incident surface; a third incident surface 2d having the maximum outer diameter larger than the light emitting surface of the LED; a first reflective surface 2h having a shape in which the cross section is a part of an ellipse; a first exit surface 2i having a convex lens shape; and an aspherical concave lens shape 2j.SELECTED DRAWING: Figure 1 【課題】発光部が大きい発光体を使用した際にも集光体を小さくすることが可能な照明装置１を提供する。【解決手段】発光素子３ａと発光素子３ａ実装される実装基板３ｂと前記実装基板に所定の電力を供給する電源回路と、発光素子３ａから放射される光を集光するための集光体２を有し、集光体２は、凸レンズ形状の第一入射面２ｂと、略円筒形状の第二入射面２ｃと、発光素子３ａの発光面３ｃの最大外形より小さい最小内径と、最大外径を有する第三の入射面と、第二の入射面と、ＬＥＤの発光面より大きい最大外径をもつ第三の入射面２ｄと、断面が楕円の一部を為す形状の第一反射面２ｈと、凸レンズ形状の第一出射面２ｉと、非球面の凹レンズ形状である２ｊを有することで、発光部が大きい発光体を使用した際にも集光体を小さくすることが可能となる。【選択図】図１