| 摘要 |
A lens component (7) disperses light from a light source (6) having light distribution characteristics in which brightness is decreased moving farther from a light axis (21). The lens component (7) includes a light incidence section (23) at which light from the light source (6) disposed in a light source position P is incident, and a plurality of light guide parts (24A-24I) branching from the light incidence section (23) and extending in a radial shape from the light source position P. Each light guide part (24A-24I) includes a base end part joined to the light incidence section (23), an emission end part at which light is emitted outward away from the light source (6), and a light guide reflection surface for guiding light incident at the base end part while reflecting the light within the plane. The light incidence section (23) and the plurality of light guide parts (24A-24I) constitute a part of a light dispersion structure. The light dispersion structure is configured such that for the light emitted from the light dispersion structure, the ratio of the brightness in a prescribed direction forming a prescribed angle in relation to the light axis (21) to the brightness in the direction along the light axis (21) is greater than the ratio corresponding to the distribution characteristics of the light source (6). |
