Abstract

The nature of the photographic image is such that the value of density is dependent upon the optical system in which the image is employed. Light-scatter by the embedded silver particles has been thoroughly discussed in the literature of photography, but, for the most part only the extreme systems of densitometry—“diffuse” and “specular” have been considered. This paper summarizes the previous conclusions and extends the discussion to certain intermediate optical systems of practical importance.

© 1934 Optical Society of America

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