Trifocal mirror-reflector

Details Trifocal mirror-reflector Trifocal mirror-reflector

1976-09-23

1978-05-09

Griffin, Donald A.

Illumination

Light source and modifier

Including reflector

126271, F21V 700, F24J 302

Patent

active

040890473

ABSTRACT:
A compound reflector having a cross section in the form of a trifocal reflector is disclosed. The cross section of the compound reflector comprises a first reflector section formed along an arc of a first ellipse and a second reflector section formed along an arc of a second ellipse. Both ellipses share a common focal point which may be either the proximal or distal focal points of each reflector section.

REFERENCES:
patent: 1014972 (1912-01-01), Nichols
patent: 1153443 (1915-09-01), Pole
patent: 1341674 (1920-06-01), Rhodin
patent: 2560281 (1951-07-01), Doane
patent: 4002499 (1977-01-01), Winston

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