Thin films: a survey as of April 1975

This report appeared in the ICO Bulletin for June 1975, an intermittent publication of the International Commission for Optics. O. S. Heavens is the ICO rapporteur for thin films. A report by A. Vasko on the ICO-10 Congress held in Prague in August 1975 will appear in an early 1976 issue of Applied Optics.