Illumination – Light source and modifier – Including reflector
Patent
1982-05-13
1984-05-08
Lechert, Jr., Stephen J.
Illumination
Light source and modifier
Including reflector
362297, 362304, 362346, 362348, 362350, 362375, F21V 700
Patent
active
044478658
ABSTRACT:
A reflector lamp comprising a concave reflector having a parabolic rear section, a spherical intermediate section, and a faceted parabolic front section, each section having substantially the same common focal point, and a finite light source located at the substantially common focal point. The reflector sections are dimensioned so that substantially all light rays from the finite light source which are reflected by the spherical intermediate section become re-reflected by the faceted parabolic front section. Additionally the light rays, reflected by the facets, include components thereof which are circumferential about a lamp axis and thereby provide a beam pattern which is substantially circumferentially uniform about the lamp axis.
REFERENCES:
patent: 1880399 (1932-10-01), Benjamin
patent: 2340515 (1944-02-01), Dietrich
Henderson, Jr. Alfred J.
Putz John M.
VanHorn David D.
General Electric Company
Jacob Fred
Lechert Jr. Stephen J.
McMahon John P.
Schlamp Philip L.
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