An Automatic Comparator for Measurement of Spectra

Abstract

A digital computer has been programmed to find and measure spectral lines using a list of transmission values at equal intervals along a spectrum plate. The apparatus for making the list and the general computing scheme are described. The computer output consists of the position, wavenumber, intensity, and shape for each line found. Over 200 lines/min are processed by the computer. Readings are made as well as can be done by an operator using a photoelectric comparator.