Abstract

Some simple methods are described for producing an extended field of straight sinusoidal white-light fringes, whose contrast can be varied from 0 to 1 with the average power held constant. The contrast is controlled with a single moving element. The chromatic content of the fringes can also be controlled.

© 1982 Optical Society of America

White-light speckle method of measurement of flow velocity distribution

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Phase contrast flow visualization

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