THE USE OF FOURIER-TRANSFORM TECHNIQUES FOR THE ANALYSIS OF HOOK INTERFEROGRAMS

Hook interferometry is widely used for the measurement of atomic oscil lator strengths and atomic energy level populations. The application o f Fourier transform techniques to the analysis of hook interferograms is shown to produce greater precision in the determination of hook sep aration by either the hook or vernier methods. Results obtained for co pper density in a magnetron sputtering discharge are presented.