| 摘要 |
<p>The luminaire has a concave reflector (1) with an optical axis (3) in a plane of symmetry (2), suitable to receive an elongate light source transverse to said plane (2). The reflector (1) is composed of flat facets (10, 10') which are bounded by first parallel planes (8) which are transverse to the plane of symmetry (2), and which facets (10, 10') are arranged in rows (11, 11') by second planes (9) which are parallel to the plane of symmetry (2). The first planes (8) are at an acute angle to a light emission window (5). The reflector (1) touches said window (5) at one side of the axis (3) and is extended by a light reflecting screen (7) up to said window (5) at the opposite side of the axis (3). The luminaire can be used to illuminate sports fields, the light emission window (5) being directed downwards, has a sharp cut-off angle and prevents stray light above the horizontal.</p> |
