Elastic-wave monitoring device and surface-acoustic-wave device

Details Elastic-wave monitoring device and surface-acoustic-wave device Elastic-wave monitoring device and surface-acoustic-wave device

2006-05-30

2006-05-30

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

By polarized light examination

With polariscopes

C356S491000, C356S364000

Reexamination Certificate

active

07054005

ABSTRACT:
An elastic-wave monitoring device includes an optical system which is arranged so that a circularly polarized light from a light source is incident to a measured object and a light beam from the measured object passes through a polarizing filter to a photodetector. A detection unit detects periodic fluctuation components of an output signal of the photodetector. In the elastic-wave monitoring device, the polarizing filter is arranged to have a polarization transmission axis directed to one of directions of principal axes of an ellipse formed by intersections of an index ellipsoid of the measured object and a plane perpendicular to an incidence direction of the light beam and passing through an origin of the index ellipsoid.

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Optical Waves in Crystals by Yariv, Yeh, Wiley-Interscience, 1983, p. 77.

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