Difference between revisions of "Revolving Screen"
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Revision as of 01:09, 25 February 2009
2-4-120
An opaque screen, usually of cylindrical form with apertures revolving about a vertical axis in such a way as to interrupt the light from a luminous source in an optic, and so to produce a desired rhythmic light.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
