Abstract

Rapidly expanding production of electron microscope plates at a large industrial metallurgical research laboratory recently brought out two serious defects in standard methods for printing positive plates. First, useful photographic detail in the glass-plate negatives was not being reproduced in the paper prints. Secondly, separate exposure of individual plates was too slow a process for satisfactory speed in delivering prints to the research staff. This article describes a technique of contrast-controlled printing that was then applied at the laboratory, presenting several representative plates to demonstrate improved photographic quality and summarizing the resulting reductions in print cost and delivery time.

© 1965 Optical Society of America

Image Quality Requirements in Optical Systems for Reproducing Typewritten Documents

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