POLARIZED BEAM, MATCHED COINCIDENT BEAM PATH, INTERFEROMETRIC GRADIOMETER APPARATUS AND METHOD

A gravity gradient is measured interferometrically from two polarized light beams having mutually different polarization planes which reflect from opposite surfaces of two freefalling test masses. The two polarized light beams project along matched coincident beam paths and divert from the coinciden...

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Bibliographic Details
Main Authors KLOPPING, FRED J, BILLSON, RYAN M, NIEBAUER, TIMOTHY M
Format Patent
LanguageEnglish
French
Published 09.10.2014
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:A gravity gradient is measured interferometrically from two polarized light beams having mutually different polarization planes which reflect from opposite surfaces of two freefalling test masses. The two polarized light beams project along matched coincident beam paths and divert from the coincident paths to interact with the freefalling test masses. An enhanced level of common mode rejection of adverse influences arises from traversing the coincident beam paths. Selon la présente invention, un gradient de gravité est mesuré par interférométrie à partir de deux faisceaux lumineux polarisés qui présentent des plans de polarisation mutuellement différents et qui se reflètent à partir des surfaces opposées de deux masses d'essai tombant en chute libre. Les deux faisceaux lumineux polarisés font saillie le long des trajets de faisceau coïncidents adaptés et dévient des trajets coïncidents pour interagir avec les masses d'essai tombant en chute libre. Un meilleur niveau de réjection de mode commun des influences néfastes résulte du croisement des trajets de faisceau coïncidents.
Bibliography:Application Number: WO2014US18912