Illumination – Light source and modifier – Including selected wavelength modifier
Patent
1995-03-07
1996-05-07
Gromada, Denise L.
Illumination
Light source and modifier
Including selected wavelength modifier
362294, 362333, 362373, F21V 900, F21V 2900
Patent
active
055152546
ABSTRACT:
An automated color mixing wash luminaire includes a movable yoke and a housing movably connected to the yoke. The housing has a first portion including a light source and provides for removing heat generated from the light source. A second portion of the housing includes movable color filters and a power lens. The light source is operable to project a beam of light along a path through the color filters and the lens. Heat removal is provided by cooling fins and at least one heat filter supported in the path of the beam so that a portion of the beam passes through the heat filter and a portion of the beam is reflected from the path toward the cooling fins. The power lens is formed by a disc of cast transparent material including several lens elements in a honeycomb pattern. Each lens element has a convex surface. At least one of the color filters is a gradient density color filter formed of a disc-shaped substrate having a planar surface including a photolithograpically etched film deposited thereon. The film forms a Gausian pattern arcuate band extending around a substantial portion of the planar surface. The band has inner and outer edges and the density of the film is greater in an area along a radius between the inner and outer edges and less along the radius at the inner and outer edges.
REFERENCES:
patent: 3260152 (1966-07-01), Aston
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patent: 4914556 (1990-04-01), Richardson
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patent: 5442252 (1995-08-01), Golz
Washlight Brochure--Light & Sound Design (no date).
Washlight Brochure--Vari Lite (no date).
Cogburn Christopher A.
Dubinovskiy Mikhail A.
Maddox Jeffrey T.
Smith Carroll W.
Stultz Mark A.
Bell James R.
Gromada Denise L.
High End Systems Inc.
Raab Sara Sachie
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