ILLUMINATING DEVICE

PROBLEM TO BE SOLVED: To provide an illuminating device that improves light extraction efficiency while securing dielectric strength voltage between a light source and a reflecting mirror.SOLUTION: An illuminating device 10 comprises a light source 15, a cylindrical reflecting mirror 18, and a light guide pole 20. The reflecting mirror 18 comprises an incident opening 30 on which light from the light source 15 is incident, on one side. The reflecting mirror 18 comprises an emitting opening 31 from which light is emitted, on another side. The reflecting mirror 18 is arranged via a gap 19 between the one side and the light source 15. The light guide pole 20 has an insulating property, and is at least partially interposed in the gap 19 between the light source 15 and the one side of the reflecting mirror 18. The light guide pole 20 guides light from the light source 15 to the incident opening 30 of the reflecting mirror 18.SELECTED DRAWING: Figure 1 【課題】光源と反射鏡との間の絶縁耐圧を確保しつつ、光取出効率を向上した照明装置を提供する。【解決手段】照明装置10は、光源15と、筒状の反射鏡18と、導光柱20とを有する。反射鏡18は、一端側に光源15からの光が入射する入射開口30を備える。反射鏡18は、他端側に光が出射する出射開口31を備える。反射鏡18は、一端側と光源15との間に隙間19を介して配置される。導光柱20は、絶縁性を有し、光源15と反射鏡18の一端側との隙間19に少なくとも一部が介在される。導光柱20は、光源15からの光を反射鏡18の入射開口30に導く。【選択図】図１