Primary reflector for indirect street lighting, comprises luminous source within a nearly paraboloid reflecting surface and downstream rectangular diaphragm directing light to secondary reflector

摘要

The primary reflector unit consists of a box (20) which contains a luminous source (22) located within a reflecting surface (24a,24b). The reflecting surface is nearly a paraboloid and is conveniently made from two rectangular surfaces by joining their shorter sides and applying progressive deformation. A diaphragm (26) is added downstream to control direct light from the luminous source An Independent claim is also included for: An indirect street light which uses the primary reflector.