Abstract
Modern electronic computers can produce spot diagram data at a pace which makes human selection of best spot diagram impracticable. In a particular mechanical image dissector the energy falling onto the photocathode redistributes as the scan progresses from field point to field point. The receiving surface is considered to be a rectangular network. Rays representing unit energy are traced through the system and for each field point the total energy in each square is determined. Applying chi-squared methods to the numerical matrices derived for the field points in a scan, the redistribution between field points is numerically evaluated. This digital evaluation makes feasible automatic data reduction of spot diagram information. The technique may provide the basis for reducing data in similar spot diagram applications.
© 1958 Optical Society of America
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