Abstract

A systematic study has been made of the formation of photographic relief images for sinusoidal exposures in the spatial frequency range 0 to 200 lines/mm. It is found that, for a given process and emulsion, the differential height of the surface relief between minimum and maximum density points is strongly dependent on frequency. For a given peak-to-peak density swing, the relief height is very small at zero frequency, builds up to a maximum at a spatial frequency which is inversely proportional to the emulsion thickness, and then declines slowly with increasing spatial frequency. The effect is explained in terms of the differential tanning action of the developer between high- and low-exposure regions. The effect has been studied as a function of several emulsion parameters, processing, spatial frequency, peak-to-peak density swing, and emulsion thickness.

© 1968 Optical Society of America

Optical-Path Variation in a Photographic Emulsion

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Characterization of a Bleached Photographic Material

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