Laser displacement interferometers with subnanometer resolution in absolute ballistic gravimeters

This is a description of the overall structure of an absolute ballistic gravimeter in which a test object moves freely in a vacuum in the gravitational field. This system is intended for determining the acceleration of gravity using measurements of length and time intervals in the equation of motion...

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Bibliographic Details
Published in:Measurement techniques 2012-06, Vol.55 (3), p.221-228
Main Authors: Vitushkin, L. F., Orlov, O. A., Germak, A., D’Agostino, G.
Format: Article
Language:English
Subjects:
Acceleration
Analysis
Analytical Chemistry
Ballistics
Characterization and Evaluation of Materials
Displacement
Fundamental Problems in Metrology
Gravimeters
Gravitation
Gravity
Interferometers
Interferometry
Intervals
Iodine
Lasers
Measurement Science and Instrumentation
Measurement techniques
Optical instruments
Physical Chemistry
Physics
Physics and Astronomy
Studies
Time measurement
Weights & measures
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Description
Summary:This is a description of the overall structure of an absolute ballistic gravimeter in which a test object moves freely in a vacuum in the gravitational field. This system is intended for determining the acceleration of gravity using measurements of length and time intervals in the equation of motion of the test object. These intervals are measured by a laser displacement interferometer and a system for precise measurement of time intervals, which are incorporated in the gravimeter. Uncertainties in the measured acceleration of gravity and metrological support of absolute ballistic gravimeters for length and time measurements are discussed.
ISSN:0543-1972
1573-8906
DOI:10.1007/s11018-012-9944-8