Patent ID: 7057151

Claim:
Apparatus ( 10 ) for emitting light with a controlled directionality and optical divergence from at least one opening ( 30 ′; 122 ′), comprising: a light impervious surface structure ( 20 ; 120 ) comprising said at least one opening ( 30 ′; 122 ′), a periodic or quasi-periodic surface topography comprising one or several surface feature(s) ( 40 ; 123 ) and associated with said at least one opening on said surface structure, whereby light(I OUTPUT ) emerging from said opening(s) ( 30 ′; 122 ′) interacts with surface waves on said surface structure ( 20 ; 120 ) thereby providing controlled directionality and optical divergence of the emitted light(I OUTPUT ), characterised in that each of the at least one opening ( 30 ′; 122 ′) corresponds to the opening of a blind hole ( 30 ″), accommodating a light source ( 31 ), preferably in the vicinity of said opening.