| 摘要 |
The present invention relates to a light intended for illumination of a room having at least one light source (4) and a wedge-shaped light-guiding element (3). The face (10) of the light-guiding element (3) situated at the point at which the two wedge surfaces (11, 13) are furthest apart is the light entry surface for the light emitted by the light source (4). The first wedge surface (13) forms an acute angle with the light entry surface (10) in such a way that it reflects the light that is radiated into the light entry surface (10) against the second wedge surface (11). The second wedge surface (11) is the light exit surface of the light-guiding element (3). In order to ensure reflection of light, said first wedge surface (13) has side sections (17) that are inclined inwards at an angle {alpha} relative to the plane of the second wedge surface (11) as exit light surfaces. According to a first aspect of the invention, the light exit surface (11) is also profiled with adjacent elevations and indentations crosswise to the direction of the wedge in order to further improve the radiation characteristics of the light-guiding element. According to a second aspect of the invention, a transparent diffuser (20) is positioned at a distance in front of the light exit surface (11) of the light-guiding element (3). The side of said diffuser facing away from the light exit surface is profiled with adjacent elevations and indentations. The distance between the diffuser (20) and the light-guiding element (3) prevents light from entering the diffuser (20) at any angle, hereby increasing the effectiveness of the profiling. |
