Method and apparatus for controlling radiant energy

Details Method and apparatus for controlling radiant energy Method and apparatus for controlling radiant energy

1979-10-22

1981-03-17

Griffin, Donald A.

Illumination

Light source and modifier

Adjustable or repositionable modifier

354271, 355 71, G03B 2776, F21Y 1304, G03B 902

Patent

active

042570867

ABSTRACT:
Radiant energy from a luminaire body is selectively controlled by means of a diaphragm structure mounted at one side of the luminaire body. The diaphragm structure includes a plurality of radiant energy transmitting leaves, means for pivotally supporting the leaves on a housing component of the luminaire body, and cylindrical adjustment means for moving the leaves through limited arcs of travel into and out of the paths of travel of constituent rays of energy emitted from the luminaire body. The diaphragm leaves may comprise filtering elements as well as refracting bodies. By such means the characteristics, for example color, distribution etc., of the emitted radiant energy, partially or in its entirety, may be varied.

REFERENCES:
patent: 2439330 (1948-04-01), Zander
patent: 2471172 (1949-05-01), Stoller
patent: 3150559 (1964-09-01), Baasner et al.
patent: 3362313 (1968-01-01), Wollensak et al.
patent: 3689760 (1972-09-01), Stewart
patent: 4018527 (1977-04-01), Bartel et al.

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