| 摘要 |
<p>The present invention concerns an apparatus for emitting light with a controlled directionality and optical divergence from at least one opening. Said apparatus (10) comprises: a light impervious surface structure (20)comprising said at least one opening (30'), a periodic or quasi-periodic surface topography comprising one or several surface feature(s) (40) and associated with said at least one opening on said surface structure, whereby light (IOUTPUT) emerging from said opening(s) (30') interacts with surface waves on said surface structure (20) thereby providing controlled directionality and optical divergence of the emitted light (IOUTPUT).</p> |
