Illumination – Light source and modifier – Including reflector
Patent
1977-11-30
1979-06-26
Nelson, Peter A.
Illumination
Light source and modifier
Including reflector
362309, 362336, 362804, F21V 700
Patent
active
041595114
ABSTRACT:
The invention relates to a shadowless lighting appliance more particularly pplicable for illuminating areas exposed for surgery in operating theatres. A lighting appliance according to this invention is characterized by the fact that it includes at least the following combination of means: - a light source; - a reflecting surface of revolution and - a glass formed of dioptric radial elements, the function of each element being to provide, by refraction to either side of a radial plane, the spreading of a beam of light reflected by a portion of said reflecting surface proximate a generatrix thereof, such that the elemental patch of light obtained on a plane be a luminous quadrilateral. In one form of embodiment, the above combination of means further includes a sleeve consisting of an optical system surrounding the light source.
REFERENCES:
patent: 389878 (1888-09-01), Duhring
patent: 1597185 (1926-08-01), Dorey
patent: 1642339 (1927-09-01), Kast
patent: 1990390 (1935-02-01), Rudy, Jr.
patent: 3928757 (1975-12-01), Nelson
patent: 4037096 (1977-07-01), Brendgord et al.
Flocks Karl W.
Nelson Peter A.
Societe Parisienne des Anciens Etablissements Bariber, Benard &
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