Luminaire and optical system for use therein

Details Luminaire and optical system for use therein Luminaire and optical system for use therein

1975-08-04

1976-12-21

Wintercorn, Richard A.

Buckles, buttons, clasps, etc.

240106R, 340 25, B64F 120, G08G 500

Patent

active

039990540

ABSTRACT:
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.

REFERENCES:
patent: 2184004 (1939-12-01), Pennow
patent: 2352801 (1944-07-01), Rolph
patent: 3007034 (1961-10-01), Reed et al.
patent: 3250907 (1966-05-01), Keck et al.
patent: 3327104 (1967-06-01), Loch
patent: 3369112 (1968-02-01), Loch
patent: 3369113 (1968-02-01), Loch
patent: 3463913 (1969-08-01), Shavalier
patent: 3535504 (1970-10-01), Beal et al.
patent: 3624379 (1971-11-01), Bliss et al.

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