Illumination – Light modifier – Reflector
Patent
1993-09-02
1994-11-01
Lazarus, Ira S.
Illumination
Light modifier
Reflector
362 61, 362297, 362347, 362348, F21V 714, B60Q 104
Patent
active
053611934
ABSTRACT:
A reflecting surface consists of three reflecting sectors arranged around the optical axis. The first reflecting sector located above the horizontal plane including the optical axis is a part of a paraboloid of revolution having a focus at point F. The second reflecting sector consists of two sub-sectors located on the right and left sides of the vertical plane including the optical axis. A fundamental surface of the two sub-sectors has a reference parabola in a plane inclined from the horizontal plane by a predetermined angle, and is a collection of intersecting lines each obtained by cutting an imaginary paraboloid of revolution assumed for a point on an orthogonal projection of the reference parabola onto the horizontal plane by a vertical plane including an axis of the imaginary paraboloid of revolution. The third reflecting sector located below the horizontal plane is a part of a paraboloid of revolution having a focus at point G. An orthogonal projection of an arc of a discharge lamp is located between points F and G.
REFERENCES:
patent: 4760501 (1988-07-01), de Vrijer
patent: 5008781 (1991-04-01), Nino
Koito Manufacturing Co. Ltd.
Lazarus Ira S.
Raab Sara Sachie
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