Modelling laser interferometers for the measurement of the Avogadro constant

Birk Andreas; Giovanni Mana; Enrico Massa; Carlo Palmisano

doi:10.1117/12.2020282

13 May 2013 Modelling laser interferometers for the measurement of the Avogadro constant

Birk Andreas, Giovanni Mana, Enrico Massa, Carlo Palmisano

Proceedings Volume 8789, Modeling Aspects in Optical Metrology IV; 87890W (2013) https://doi.org/10.1117/12.2020282
Event: SPIE Optical Metrology 2013, 2013, Munich, Germany

Abstract

In dimensional measurements by laser interferometry, when the accuracy approaches 10^-9 λ, wavefront aberra tions cause systematic variations of the fringe period. This paper illustrates how these effects are modeled and experimentally studied in the measurements of the lattice parameter and the topographical survey of 1 kg Si spheres, which measurements are necessary to "count" atoms and to make it possible to realize the kilogram from the Planck constant value.

Citation Download Citation

Birk Andreas, Giovanni Mana, Enrico Massa, and Carlo Palmisano "Modelling laser interferometers for the measurement of the Avogadro constant", Proc. SPIE 8789, Modeling Aspects in Optical Metrology IV, 87890W (13 May 2013); https://doi.org/10.1117/12.2020282

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