| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device, the directly-beneath light intensity of which can be made higher, and which is reduced in glare.SOLUTION: A lighting device 1 includes a light source 2, a substrate 3, and a gutter-shaped cover 4 covering them. The light source 2 has an optical axis H in a normal direction of the substrate 3. The cover 4 includes an incident surface 41 into which light from the light source 2 is incident, and an emission surface 42 from which the light is emitted, where the light is dispersed and emitted from the emission surface 42. The incident surface 41 has a plurality of prisms 43 which control distribution of the incident light. The plurality of prisms 43 are formed so as to collect the light in a prescribed direction including the direction of the optical axis H. According to such a structure, the plurality of prisms 43 formed on the incident surface 41 of the cover 4 collect the light in the prescribed direction including the direction of the optical axis H, thereby making the directly beneath light intensity of the lighting device 1 higher, and the cover 4 has light dispersing properties, thereby enabling reduction in glare. |
