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Fiber-optic acceleration sensor based on the photoelastic effect

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Abstract

A novel type of fiber-optic acceleration sensor was constructed of a photoelastic substance such as isotropic epoxy resin, DAP (diallylphthalate polymer), or LiNbO3 single crystal. By a weight placed on the upper surface of the rectangular rod of photoelastic material, stress-induced birefringence is brought about in response to vibrational acceleration. With this sensor, acceleration from 10−3 to 30 G was accurately measured in the frequency range from dc to 3 kHz.

© 1983 Optical Society of America

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