| 摘要 |
PROBLEM TO BE SOLVED: To provide a fine concavo-convex-surfaced material which, when used as a light distribution controller, exhibits a certain FWHM in a direction perpendicular to a wide light distribution direction while maintaining a wide FWHM in the wide light distribution direction (a direction that shows the widest light distribution property when parallel light is incident to the light distribution body).SOLUTION: A fine concavo-convex-surfaced material has a fine concavo-convex section formed at least on a portion of a surface thereof, where the fine concavo-convex section comprises a wavy concavo-convex pattern with a plurality of non-parallelly winding convex stipe portions and concave stripe portions located between the plurality of convex stripe portions, the wavy concavo-convex pattern having multiple protrusions and recesses formed thereon, part of which at least are disposed in island-like aggregate areas.SELECTED DRAWING: Figure 1 |
