Abstract

Microprojection systems and photorepeaters using lenses of high aperture have a smaller depth of focus than the thickness of existing high resolution recording media. This has limited both the resolution and modulation capabilities of these systems. This paper describes the modification of high resolution photographic plates by dyeing with nonphotosensitive, nonfluorescing, water soluble dyes which effectively reduce their actinic depth and results in a demonstrable increase in both resolution and modulation. Several such dye systems have been characterized. The dyes tartrazine, naphthol yellow S, and metanil yellow are recommended for use with either 405-nm or 436-nm monochromatic camera systems.

© 1969 Optical Society of America

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