Dipole mass laser-based gravity gradiometer

Details Dipole mass laser-based gravity gradiometer Dipole mass laser-based gravity gradiometer

G - Physics

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G01V 7/00 (2006.01) G01V 7/10 (2006.01)

Patent

CA 1127417

DIPOLE MASS LASER-BASED GRAVITY GRADIOMETER ABSTRACT OF THE DISCLOSURE A gravity gradiometer using at least one mass dipole mounted in a laser force-measurement system to detect the torque on the mass dipole generated by gravity gradient. The mass dipole is mounted on one end of a photoelastic modulator element positioned in the laser beam to differentially modulate circular polarization modes in response to application of a torque. In a preferred form, two mass dipoles are mounted on opposite ends of the modulator element which is rigidly sup- ported at its center to improve noise rejection.

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