Patent ID: 8616708
Filing Date: 2013-12-31
Classification: F21V,G03B

Abstract:
1. A fluorescent substrate comprising: a base having a reflective surface; and a fluorescent layer formed by disposing a fluorescent substance on the reflective surface of the base; wherein fluorescence emitted from the fluorescent substance due to its excitation by exciting light is emitted from a side of the base on which the fluorescent substance is disposed; wherein the reflective surface of the base has a minute reflective structure formed thereon such that fluorescence emitted in a flat direction of the base from the fluorescent layer is emitted outward, in a direction intersecting the flat direction, from the side of the base on which the fluorescent substance is disposed; wherein the minute reflective structure comprises a flat section and a plurality of projections projecting from the flat section; wherein the base is a fluorescent wheel which is in the form of a disc, at a predetermined position on which a ring-like groove is formed, wherein the minute reflective structure is formed on a bottom face of the ring-like groove, and wherein the fluorescent layer is deposited within the ring-like groove; and wherein a side surface of each of the projections is paraboloid-shaped.