A new interferometer capable of measuring small optical path differences.
This paper reports the development of a new type of interferometer capable of measuring optical path differences of lambda/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.
Kinzly
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Cornell Aeronautical Laboratory, Inc.,Buffalo, New York 14221, USA.