LIGHT GUIDING BODY AND LIGHTING SYSTEM

摘要

A light guiding body includes, an introducing portion including a plane of incidence and a plane of reflection opposite to the plane of incidence, a diffusion portion including a first plane provided on a side of the plane of reflection and a second plane provided on the side of the plane of incidence and opposite to the first plane, a first point positioned on a border between the plane of reflection and the first plane, and a second point on the plane of incidence, wherein when a center of curvature of the first plane at the first point is a third point, an index of refraction of the light guiding body is n, the curvature of the first plane at the first point is K, and a distance between the second point and the third point is D, Formula (4) is satisfied.

主权项

1. A light guiding body comprising:
an introducing portion including a plane of incidence and a plane of reflection opposite to the plane of incidence; a diffusion portion including a first plane provided on a side of the plane of reflection and a second plane provided on the side of the plane of incidence and opposite to the first plane; a first point positioned on a border between the plane of reflection and the first plane; and a second point on the plane of incidence, wherein when a center of curvature of the first plane at the first point is a third point, an index of refraction of the light guiding body is n, the curvature of the first plane at the first point is K, and a distance between the second point and the third point is D,1nD≤Kholds.