Wavefront errors in a two-beam interferometer. (28th June 2018)

• Record Type: Journal Article
• Authors: Mana, G; Massa, E; Sasso, C P
• Is Part Of: Metrologia. Volume 55:Number 4(2018:Aug.)
• Page Start: 535
• Page End: 540
• Publication Date: 2018-06-28
• Subjects: diffraction -- length measurements -- laser interferometry; Weights and measures -- Periodicals; Weights and Measures -- Periodicals; 530.805
• DOI: 10.1088/1681-7575/aacae6
• Languages: English
• ISSNs: 0026-1394

Abstract

Abstract: This paper deals with the impact of wavefront errors, due to the optical aberrations of a two-beam interferometer, on the period of the travelling fringe observed by integrating the interference pattern. A Monte Carlo simulation of the interferometer operation showed that the fringe-period estimate is unbiased if evaluated on the basis of the angular spectrum of the beam entering the interferometer, but the wavefront errors increase the uncertainty.