There exists an ever increasing need for producing information from a machine or putting information into a machine. This information is often in alphanumeric or pictorial form and is created or presented on two-dimensional media such as film. A computer often processes information serially, so a point of light which can at great speed be controlled on a two-dimensional surface in position and intensity, is the desirable characteristic of film recorders and scanners.
Jim E. Wurtz,
F. John Marshall,
"The Application of Cathode Ray Tubes to Film Recording and Scanning," Optical Engineering 9(6), 906186 (1 September 1971). https://doi.org/10.1117/12.7971558