LIGHTING DEVICE

• Main Author: TAKEUCHI ERI
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2024
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide a lighting device which enables reduction of unevenness of illumination light.SOLUTION: A lighting device 1 emits illumination light L1 to a lighting space S1 at the outside. The lighting device 1 includes a housing 4, a light source 2, and an optical system 3. The housing 4 has an opening 4a which is open in the lighting space S1, and a lens is not located in the opening 4a. The light source 2 emits the illumination light L1. The optical system 3 is located within the housing 4 and emits the illumination light L1 from the light source 2 at a predetermined light distribution angle θ1 from the opening 4a while forming an image. An inner peripheral surface 43c of the opening 4a has a first portion and a second portion. The first portion has a portion having the smallest opening area. The second portion is located at the lighting space S1 side relative to the first portion and has an opening area larger than the opening area in the first portion. The illumination light L1 forms an image in the first portion. The inner peripheral surface 43c is located outside the light distribution area of the illumination light L1.SELECTED DRAWING: Figure 1 【課題】照明光のムラを低減させることができる照明装置を提供する。【解決手段】照明装置１は、外部の照明空間Ｓ１に照明光Ｌ１を出射する。照明装置１は、筐体４と、光源２と、光学系３とを備える。筐体４は、照明空間Ｓ１に開口する開口４ａを有し、開口４ａにレンズが位置していない。光源２は照明光Ｌ１を発する。光学系３は、筐体４の内部に位置しており、光源２からの照明光Ｌ１を結像させつつ、所定の配光角θ１で開口４ａから出射させる。開口４ａの内周面４３ｃは、第１部分と、第２部分とを有する。第１部分は、開口面積が最も小さい部分である。第２部分は、第１部分よりも照明空間Ｓ１側に位置し、開口面積が第１部分における開口面積よりも大きい部分である。照明光Ｌ１は、第１部分において結像される。内周面４３ｃは、照明光Ｌ１の配光外に位置している。【選択図】図１