| 摘要 |
PURPOSE:To conduct surface light-emission having high luminous intensity by disposing a plurality of inverted conical short cylindrical reflecting cylinders onto a concentrical circle row, where a light-emitting element is positioned at the center, and reflecting beams from the light-emitting element. CONSTITUTION:Each reflecting cylinder 18a, 18b... is formed in cylinder bodies of conical sections having different diameters, and is made of a metal or plastics or the like. Since high reflection treatment such as nickel plating is executed to the surface section and back section of the metal or plastics or the like, the surface section and the back section reflect beams from a light-emitting element 14, and the luminous intensity of surface light-emission is intensified. Consequently, the luminous intensity of surface light-emission can be improved without mixing a scattering material into a cap 11. Several reflecting cylinder 18a, 18b... constituting a reflector 17 is arranged to a stepped shape that a central section is made highest and the cylinders are lowered gradually toward a peripheral section while respective reflecting cylinder 18a, 18b... consists of a cylinder body with inverted cut-head truncated cone sections. |
