BS 4120:1968
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Methods for the measurement of performance of still projectors
BSI Group , 09/26/1968
Pages: 10
General conditions of test. Test methods for determining accuracy of location of the pictures projected on the screen, resolving power, uniformity of illumination, temperature rise of slide, distance between lens and screen for a 1 m wide picture, light output and working temperature of casing.Cross References:BS 1363BS 1915BS 1917
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