Abstract

An evaluation is made of a criterion suggested by Temple for the size and location of obstacles in the focal plane of a schlieren interferometer. Measurements of the thermal distributions near a heated vertical plate and near a heated horizontal cylinder are presented. The results of previous experiments are discussed; the results of new experiments are reported. It is concluded that, unless the criterion is satisfied, the resulting fringe systems will not give the correct quantitative results.

© 1967 Optical Society of America

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