title: Calibration method for high-accuracy measurement of long focal length with Talbot interferometry: comment.
abstract: In a recent paper [Appl. Opt.51, 2407 (2012)APOPAI0003-693510.1364/AO.51.002407], the authors presented a calibration method for the long focal length Moiré fringe measurements to reduce the relative error to less than 0.02%, which was based on two presented results. We tried to reproduce the same results with the information and equations provided but were unsuccessful.
authors.forename: Sukmock
authors.initials: S
authors.lastname: Lee