Patent ID: 8770821

Claim:
An optical arrangement comprising: a light guide ( 101 ) having a light-entry portion ( 103 ) with a light-entry surface ( 105 ), a tapering portion ( 107 ) with a light reflecting surface ( 111 ), a light-exit surface ( 109 ), the light-entry portion ( 103 ) being arranged to guide light from the light-entry surface ( 105 ) in a first direction (x) towards the light reflecting surface ( 111 ), the light reflecting surface being arranged in relation to the first direction (x) so that incident light from the light-entry portion ( 103 ) is reflected towards the light-exit surface ( 109 ); a light transmitting layer ( 113 ) adapted to transmit light diffusively and arranged to cover at least a portion of the light-entry surface ( 105 ) of the light guide ( 101 ), wherein the light transmitting layer is a light emitting layer adapted to emit light in response to excitation by light; a light source arranged to directly or indirectly illuminate the light transmitting layer; a re-transmitting light source ( 115 ) arranged to illuminate the light transmitting layer ( 113 ) in response to illumination by the light source ( 117 ); a transmissive re-direction layer ( 121 ), which covers the light-exit surface ( 109 ) of the light guide ( 101 ) and has triangular elements ( 123 ) formed in the surface of the layer facing the light-exit-surface ( 109 ) of the light guide ( 101 ); and a second light guide ( 153 ; 157 ) arranged to guide light to the light transmitting layer ( 113 ), said second light guide being adapted to guide light in the second light guide's interior along a guide direction (y) using reflections in lateral surfaces ( 155 ; 159 ) of the second light guide, which surfaces are substantially parallel to said guide direction (y), the second light guide having a light input area ( 158 ) for in-coupling of light and a light output area ( 168 ) for output of light to the light transmitting layer ( 113 ), wherein the light output area ( 168 ) is arranged at a distance from the light input area ( 158 ) in the guide direction (y).