Abstract

A method is described for producing samples of an “ideal model” of the developed photographic image (opaque circular dots distributed randomly over a clear background). The dots originate as random scintillations on the face of a cathode-ray tube and are recorded photographically. Expressions for density, root-mean-square density deviation, and Selwyn granularity are derived on the basis of the model. Samples produced by this method are shown experimentally to conform to the expected properties.

© 1961 Optical Society of America

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Equations (11)

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