Abstract: An optically active color filter for controlling the color of light produced by a light source. The color filter includes an optically active device positioned between a linear polarizer and an adjustable position linear polarizer whose orientation can be controlled mechanically or electrically. In a preferred embodiment, the optically active device contains a liquid optically active substance such as high maltose corn syrup. The optically active color filter may be used for controlling the color of a light source such as a stage light or spotlight and in other applications requiring a device for controlling the color of a light source.

Abstract: An optically active color filter for controlling the color of light produced by a light source. The color filter includes an optically active device positioned between a linear polarizer and an adjustable position linear polarizer whose orientation can be controlled mechanically or electrically. In a preferred embodiment, the optically active device contains an liquid optically active substance such as high maltose corn syrup. The optically active color filter may be used for controlling the color of a light source such as a stage light or spotlight and in other applications requiring a device for controlling the color of a light source.

Abstract: A climate controlled, universally positionable enclosure having a clear glass projection window which may be used both indoors and outdoors to contain commercially available lighting fixtures which are not normally intended for outdoor use. The enclosure comprises a central light fixture/electronic component housing compartment, and means for directing and controlling the flow of air and moisture through the enclosure to prevent moisture from entering the housing compartment. The enclosure further comprises an electronic, multi-function climate control unit comprising heating and cooling devices which maintain the temperature and condensation inside the housing compartment within the light fixture's preferred operating range. The outside surface of the enclosure comprises a plurality of mounting channels to which brackets or bolts may be attached for universal mounting.

Abstract: A lighting fixture having a plurality of adjustable lamps provides multiple beams of light which may be simultaneously converged or focused at substantially any distance in front of the fixture or diverged to produce a broad flood. The fixture comprises a focusing mechanism for simultaneously controlling the axial position of a central lamp and the inclination of a plurality of outer lamps tightly clustered and arranged around the central lamp.