To determine the volume of solid density standards, manufactured as Si-crystal spheres, an optical interferometer is used to measure their diameter at the NMIJ. To support and complement these measurements, the effect of the Gouy phase has been studied analytically and numerically. In measurement, the sphere is placed between the end-mirrors of a Fizeau cavity and the distances between the cavity mirrors and the sphere are measured, as well as the cavity length. The present analysis outlines a model of the interferometer operation and quantifies the Gouy-phase correction in the diameter measurement.
Phase corrections in the optical interferometer for Si sphere volume measurements at NMIJ / B., Andreas; L., Ferroglio; K., Fujii; N., Kuramoto; Mana, Giovanni. - In: METROLOGIA. - ISSN 0026-1394. - 448:(2011), pp. s104-s111. [10.1088/0026-1394/48/2/S13]
Phase corrections in the optical interferometer for Si sphere volume measurements at NMIJ
MANA, GIOVANNI
2011
Abstract
To determine the volume of solid density standards, manufactured as Si-crystal spheres, an optical interferometer is used to measure their diameter at the NMIJ. To support and complement these measurements, the effect of the Gouy phase has been studied analytically and numerically. In measurement, the sphere is placed between the end-mirrors of a Fizeau cavity and the distances between the cavity mirrors and the sphere are measured, as well as the cavity length. The present analysis outlines a model of the interferometer operation and quantifies the Gouy-phase correction in the diameter measurement.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
