Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1993-12-09
1994-11-29
Turner, Samuel A.
Optics: measuring and testing
By particle light scattering
With photocell detection
25022719, 73517R, G01B 902
Patent
active
053694856
ABSTRACT:
An accelerometer or seismometer has an elastic disk bearing a mass distributed peripherally around the disk. The disk is supported for flexure and for isolation from mounting strain by a stob centrally through the disk. The accelerometer or seismometer has a pair of flat spirals of optical fiber, each spiral being fixedly attached to a corresponding disk side so that disk flexure lengthens a spiral on one disk side and shortens a spiral on an oppositely facing disk side and so that temperature differences between the spirals are minimized. The pair of spirals are connected as legs of a fiber optic interferometer so that the interferometer provides an output corresponding to the flexure. Several of the disks and asociated pairs of spirals may be coaxially mounted to provide increased sensitivity.
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Brown David A.
Garrett Steven L.
Hofler Thomas J.
Church Stephen J.
Forrest, Jr. John L.
Sliwka Melvin J.
The United States of America as represented by the Secretary of
Turner Samuel A.
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