LIGHTING FIXTURE

To provide a lighting fixture suppressed in generation of light not under light distribution control and suppressed in reduction in light extraction efficiency.SOLUTION: A lighting fixture 1 includes: a cylindrical light reflection body 80 an opening at one end 81a of which is larger than an opening...

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Bibliographische Detailangaben
Hauptverfasser: HIRANO AKIHIRO, MIYAGAWA NOBORU
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a lighting fixture suppressed in generation of light not under light distribution control and suppressed in reduction in light extraction efficiency.SOLUTION: A lighting fixture 1 includes: a cylindrical light reflection body 80 an opening at one end 81a of which is larger than an opening at the other end 81b thereof and which has an inside surface 81; a light source 20 disposed on the side of the one end 81a of the light reflection body 80; and a lens 40 disposed on the side of the other end 81b of the light reflection body 80. The lens 40 has an annular projection part 41 projecting toward the inside surface 81. The light reflection body 80 has an annular separation part 85 provided on the inside surface 81. The separation part 85 is located with a space to a tip end 41a of the projection part 41 in a direction parallel to an optical axis J1 of the lens 40, and has a retreating surface 85a retreating from the inside surface 81.SELECTED DRAWING: Figure 4 【課題】配光制御されない光が発生することを抑制し、照明器具の光の取り出し効率の低下を抑制する。【解決手段】照明器具1は、一端81aの開口よりも他端81bの開口が大きく、内側面81を有する筒状の光反射体80と、光反射体80の一端81a側に配置されている光源20と、光反射体80の他端81b側に配置されているレンズ40とを備える。レンズ40は、内側面81に向けて突出する環状の突出部41を有する。光反射体80は、内側面81に設けられた環状の離間部85を有している。離間部85は、レンズ40の光軸J1と平行な方向において突出部41の先端41aに対して隙間をあけて位置し、内側面81から後退する後退面85aを有している。【選択図】図4