| 摘要 |
PURPOSE: A flexible-form lens is provided to employ a pile-up effect of angular distribution capable of improving the production tolerance of an LED lighting device, in order to make light, which is emitted from an LED light source and passes through the surface of a lens, have a certain form of angular distribution on the lighting surface. CONSTITUTION: The surface of a flexible-form lens is divided into two sections, and light refracted through the sections reaches the entire area of the lighting surface while forming a certain form of angular distribution on the lighting surface. The two sections have different flexible-form curved surfaces in order to make the two angular distributions of light on the lighting surface by the two sections be the same and be overlapped. |
