The Use of a Photoelectric Scanner and Moiré Fringes for Wavelength Measurement of Atomic Spectra

Abstract

The problem of wavelength measurement for large numbers of lines on photographic plates and methods used for its solution are discussed. A description is given of the apparatus for cathode ray tube presentation of the spectra. Standard Ferranti fringe counter equipment was used with a Hilger measuring microscope and a Creed reperforator to record the results on tape for subsequent calculation by electronic computers.