Illumination – Light source and modifier – Including selected wavelength modifier
Reexamination Certificate
1997-06-04
2001-06-05
Husar, Stephen (Department: 2875)
Illumination
Light source and modifier
Including selected wavelength modifier
C362S277000, C362S281000, C362S284000, C362S321000, C362S322000
Reexamination Certificate
active
06241366
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to stage and theater lighting fixtures and more particularly to a color wash luminaire which provides mechanical dimming to change light intensity and improve the uniformity of the dimming effect.
BACKGROUND OF THE INVENTION
Wash lights, as they are generally known, are used to provide uniform illumination and coloration to a theatrical set. Halogen lamps are often used in such lights. Halogen lamps have the advantage of controlled dimming but the disadvantage of more heat output than some other lamp types. Mechanical dimming can also be used with lamps which do not have controlled dimming.
Conventional mechanical dimming typically utilizes non-transparent elements which close or reduce the beam size to create a dimming effect. An undesirable side effect of this is that the dimming results in non-uniform intensity across the light beam caused by the non-transparent elements. Thus, a profile of the shape of the elements is revealed by their projected shadow, and this effect is at its worst when the elements are almost completely closing off the beam.
The foregoing illustrates limitations of the known prior art. Thus it is apparent that it would be advantageous to provide alternatives directed to overcoming one or more of the limitations as set forth above. Accordingly, suitable alternatives are provided including features and benefits more fully disclosed hereinafter.
SUMMARY OF THE INVENTION
In one aspect of the present invention this is accomplished by providing a diffusing dimmer apparatus comprising an arm formed of non-transparent material and having a first end and a second end, the first end having a mounting attachment. An extension portion of light diffusing material is connected to the second end and extends outwardly from the second end to a terminal edge formed in the light diffusing material.
In another aspect of this invention, this is accomplished by providing a diffusing dimmer apparatus mounted on the support and movable between first and second positions, the dimmer including at least one arm formed of non-transparent material and having a mounting attachment at a first end and a scalloped edge formed at a second end, an edge portion of light diffusing material connected to the second end overlaying the scalloped edge and extending outwardly from the scalloped edge and terminating at another scalloped edge formed in the diffusing material.
In still another aspect of this invention, this is accomplished by providing a light fixture having a diffusing dimmer apparatus comprising a lamp operably mounted in the fixture and provided to project a beam of light, a plurality of color wheels mounted in the fixture, a support plate mounted adjacent the color wheels, the plate having an opening whereby the beam passes through the color wheels, a diffusing dimmer mounted for movement between first and second positions, one of the positions being a position wherein the dimmer covers the opening, the dimmer including first and second arms movable toward each other in overlapping relationship, each arm being formed of non-transparent material having a mounting attachment at a first end and a scalloped edge formed at a second end, and an edge portion formed of light diffusing material connected to the second end overlaying the scalloped edge and extending outwardly from the scalloped edge and terminating at another scalloped edge formed in the diffusing material.
In an further aspect of this invention, this is accomplished by providing a moving light fixture comprising a yoke, means for movably suspending the yoke from a support, a housing movably connected to the yoke, the housing having a first portion including a light source and means for removing heat generated from the light source, and a second portion including a plurality of moving color filters, a plurality of lens devices, the light source being operable to project a beam of light along a path through the color filters and the lens devices, a diffusing dimmer mounted adjacent the path, the diffusing dimmer including at least one arm movable to a position blocking the light beam, the arm formed of a non-transparent material and having a mounting attachment at a first end and a scalloped edge formed at a second end, and an edge portion formed of light diffusing material connected to the second end overlaying the scalloped edge and extending outwardly from the scalloped edge and terminating at another scalloped edge formed in the diffusing material.
The foregoing and other aspects will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawing figures. It is to be expressly understood, however, that the figures are not intended as a definition of the invention but are for the purpose of illustration only.
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High End Systems, Inc Cyberlight Brochure—The Ultimate Power Tool featuring CYM Color Mixing.
Dubinovskiy Mikhail A.
Roman Brian P.
High End Systems Inc.
Husar Stephen
Ward John Anthony
LandOfFree
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