Patent ID: 9395465
Filing Date: 2016-07-19
CPC Classification: G01V

Claim Text:
1. An apparatus for estimating gravitational properties, comprising: an optical source configured to emit electromagnetic radiation; a first interferometer including a fixed reference reflector and a first reflector coupled to a first moveable mass, the first mass configured to move a first amount in response to a change in gravitational force; a second interferometer including the fixed reference reflector and a second reflector coupled to a second moveable mass, the second mass configured to move a second amount in response to a change in gravitational force, the second amount being smaller than the first amount; a first detector configured to detect a first interference pattern generated by the first interferometer; a second detector configured to detect a second interference pattern generated by the second interferometer; and a processor configured to estimate the change in gravitational force based on a combination of the first and second interference patterns.