Abstract

Liquid drops were levitated and deformed with acoustic techniques and illuminated with monochromatic light. Changes in the rainbow-angle scattering induced by the deformations were detected. Reflected and refracted rays form an interference pattern that changes with shape and the angle of Airy’s diffraction pattern shifts. A calculation by W. Möbius [ Ann. Phys. (Leipzig) 33, 1493 ( 1910)] was modified to facilitate the use of these changes for the measurement of micron amplitude shape oscillations of millimeter radius drops.

© 1980 Optical Society of America

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