| 摘要 |
<p>LUMINAIRE AND OPTICAL SYSTEM FOR USE THEREIN A luminaire for providing at least a shallow uniform equatorial zone of illumination above the pavement of airport taxiways and parking areas comprising a housing provided with an upper section having a vertical opening therethrough, a lens within the opening having a shallow frustoconical light exit face extending only slightly above the opening and a steeper generally conical light entrance face coaxial with and disposed below the light-entrance face, a lamp recessed substantially below the entrance face and proximate the axis of the light exit and entrance faces, and a reflector symmetrical about the axis of the exit and entrance faces for reflecting light rays from the lamp into the light entrance face at a predetermined range of angles of incidence therewith.</p> |
