Light regulation system
AssigneeControlled Environments Systems
InventorDon F. Widmayer
Life of this patent
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Abstract
A light regulation system is provided wherein the light output of a second, fluorescent lamp fixture is regulated in accordance with the light output of a first or preceeding fluorescent lamp fixture. Each fixture includes a lamp or lamps, a ballast or ballasts and a control or regulating device which controls the ballasting of the lamp(s) of the fixture and hence the light output thereof. The system provides for monitoring the light output of the master fixture and optically coupling a corresponding signal to a photocell in the control device of the following fixture so as to control the output of the lamp(s) of the following fixture. Additional fixtures can be optically coupled in like manner to either the master or a follower fixture to provide additional controlled following fixtures.
Claims7
A light regulation system for controlling the output of at least one lamp in a follower fixture in accordance with the light output of a master fixture containing at least one lamp, said lamps comprising arc discharge lamps and said lamp units each comprising a ballast for the at least one lamp and a control device for controlling the ballast and hence the light output of the at least one lamp, said system comprising optical-electrical transducer means in the control device of said follower fixture for controlling the output of the control device of the follower fixture in accordance with the light input received thereby, and light collecting and coupling means for collecting the light output of the at least one master lamp and for coupling the said output of said at least one master lamp to said optical-electrical transducer means.
Dependencies are inferred from the claim text.