| 摘要 |
According to the invention a beacon lantern and a lens (1) for the same with improved light transmission factor are provided which is easy to manufacture and uses LEDs as light source. The lantern comprises a light source (10) of a plurality of LEDs radially distributed on a horizontal circumference and a cylindrical fresnel lens (1) converging beams of light in horizontal directions, in which the lens comprises a sheet-like, fine prism-shaped linear fresnel lens bent into the shape of a cylinder. Furthermore, the lantern comprises a top lid (18) and a lower lantern body (19), which are held with a prescribed distance therebetween by way of a center bolt, between said lid and lower lantern body a transparent cylindrical cover (2) is arranged, on the inner surface thereof is the rolled sheet-like linear fresnel lens joined therewith. <IMAGE> |
