Abstract

A transmission-type optical interference filter has been constructed which controls the color of the light passing through it in accordance with the magnitude of a dc electrical signal. This is accomplished by magnetostrictively varying the separation of a pair of plane parallel quartz optical flats having thin film coatings. The results indicate that such devices are feasible. Some theory for the filter action is given, and data for this particular laboratory model are shown.

© 1954 Optical Society of America

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Equations (10)

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