| 摘要 |
<p>The device has a light guide (10) associated to a light source (12) propagating in the guide in order to emerge parallely to a general direction of emission by an exit side (16) of the guide, where the side has thickness (E) less than 20mm. The guide has internal intermediary walls (17) or lateral walls (18) on which light rays undergo a total reflection. The source is associated to an optical system such that light rays are emitted over 360 degrees around an optical axis of the source, in a preset angle with respect to a horizontal plane perpendicular to the axis of the source.</p> |
