| 摘要 |
The lamp has a number of LEDs (1), where each LED is arranged downstream of an optical focusing element (10). An electrically adjustable diffuser (3) i.e. foil, is arranged downstream of the focusing element in a main emitting direction of the LEDs. A control unit (4) is connected with the diffuser and adjusts light diffusion effect of the diffuser. The control unit adjusts width of a light cone of an emitted light beam during operation of the lamp. Each LED is arranged downstream of another optical focusing element e.g. Fresnel lens. |
