| 摘要 |
<p>A lighting device (1) comprises a light guide (2) comprising a front surface (3), a back surface (4) opposite said front surface and an edge surface (7), at least one point light source (8) arranged to emit light into said light guide through said edge surface, and a reflective element (6) adjacent to said back surface of said light guide, such that light (12) travelling within said light guide is reflected by said back surface and/or said reflective element and is emitted through said front surface. The lighting device (1) further comprises a pattern of light scattering structures (5a, 5b, 5c) in optical contact with said front surface (3), which allows a range of different beam shapes to be created. The smallest dimension or size, d, of the light scattering structures is important for obtaining the desired effect. The lighting device provides improved illumination of large building areas.</p> |
