| 摘要 |
A lighting apparatus that produces a single unified beam comprises multiple light sources 2, e.g. light emitting diodes, and a generally convex composite lens 20 comprising an array of lens elements 4, each with a focal point 10. Each lens element 4 has a plurality of stepped concentric rings provided on the inside surface thereof and an array of a plurality of generally convex rectangular facets 8 formed on the outside surface thereof. Each of the lens elements 4 has associated with it a single LED 2 at its respective focal point 10. The lighting apparatus is suitable for use as warning lamps, especially for vehicles. |
