Abstract

The special techniques required to measure the photographic transfer functions defined in Part I are described, and detailed methods of computation are given. A photographic procedure for separating isotropic optical losses into lens and film components is discussed; results of this method are compared with data obtained by different methods at other laboratories. Illustrative measurements of both optical and chemical transfer functions are presented for several different emulsions and processing techniques. These data are consistent with the model proposed in Part I and with microdensitometer traces of “knife-edge” exposures. It is indicated that the term “adjacency effects” should be abandoned in favor of the more general formulations used here.

© 1961 Optical Society of America

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