This paper reports the development of a new type of interferometer capable of measuring optical path differences of λ/1000 or less. Experiments that verify this capability were performed and are reported. The interferometer exhibits, in addition to a high sensitivity, an advantage of increased environmental stability over more conventional interferometers which depend upon optical path changes manifested as fringe shifts.
© 1967 Optical Society of America
Original Manuscript: April 11, 1966
Published: January 1, 1967
Robert E. Kinzly, "A New Interferometer Capable of Measuring Small Optical Path Differences," Appl. Opt. 6, 137-140 (1967)