1 April 1976 Laser Color Recording Directly on Nine-Inch Color Film
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Optical Engineering, 15(2), 152119 (1976). doi:10.1117/12.7971930
A Laser Color Recorder is described which yields Landsat or similar high-resolution images directly on photographic color film. This development, sponsored by NASA Goddard Space Flight Center, provides the capability for transferring computer-formatted magnetic tape data directly to positive or negative color imagery. Designed to circumvent the current task of reconstructing color images by combining individual (monochrome) color separation negatives, this recorder yields Landsat pictures, directly, with growth potential for the recording of advanced, high-resolution color image sensor data. Three individual laser beams, representing the three primary colors, are modulated separately, then combined precisely to form a single beam of light. This synthesized beam, in which the instantaneous hue and intensity are determined by the modulating signals, is focused on the recording film through a rotating scanning mirror. The entire scanner assembly is translated across the format length to form a raster image directly on the photographic color film.
Merle Hannah, William Harris, "Laser Color Recording Directly on Nine-Inch Color Film," Optical Engineering 15(2), 152119 (1 April 1976). https://doi.org/10.1117/12.7971930

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