| 摘要 |
The zoom lens with multi-layers for illumination mainly comprises a lens body that has at least one free curved surface on a side. The free curved surface is designed to be multiple zoom curved surfaces with multiple layers. Besides, one side of the curved surface is designed to be oblique and the other side is arc surface. Hence, the curved surface can be divided into multiple patterns with multiple focuses through the various combinations of complex free curved surfaces. Furthermore, the control of the luminance and projection angle can be achieved by the various combinations of zooming and focusing on the curved surfaces, |
