Abstract
SUMMARYIt has been stated that interference fringes are asymmetrically distributed in the image plane of some double‐refracting microinterferometers. This defect is especially produced by typical birefringent Wollaston prisms and is responsible for some errors in the measurement of optical path differences. In particular, the errors arise when the interfringe spacing is directly measured in the image plane or determined from an interferogram recorded on a photographic material.
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