Abstract

Since ultrasonic waves in a transparent medium act upon light traversing the medium substantially parallel to the wave fronts in a way similar to a diffraction grating, it is possible to use such an ultrasonic wave grating as a color modulator or as a monochromator at high modulation rates of the intensity and spectral position of the color band transmitted. The relationships between position and resolution of the color bands and the ultrasonic parameters are investigated, and spectrograms as well as spectrophotometric measurements are presented. Various aspects of ultrasonic color modulation are considered.

© 1955 Optical Society of America

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