Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 301
dice theappearance of the picture on the screen.Assuming that the clearness and defini-tion of this picture La not appreciablyaffected, the diminution in contrast as the persons pass to the area of greaterdarkness nearer the screen. These problems are mentioned in arecent article in the Electrical… … FiG.l.—Showing special method of illuminating the Delft Theatre, Escabana, Mich., U.S.A.,by means of glass panels in the roof. This device enables a low illumination to beprovided while the performance is in progress. between the brightness of the screenand the relatively dark theatre wouldbe an…
Lighting
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