title: Calibration method for high accuracy measurement of long focal length with Talbot interferometry: reply.
abstract: Thanks to Sukmock Lee for the attention to our paper [Appl. Opt.51, 2407 (2012)APOPAI0003-693510.1364/AO.51.002407], and also for the comment [Appl. Opt.54, 10571 (2015)10.1364/AO.54.010571APOPAI0003-6935]. Two numerical mistakes were pointed out by Lee and they are corrected in this paper. However, these numerical mistakes do not affect the feasibility and precision of this calibration method. Therefore, it cannot be concluded that it is difficult to agree with the calibration method for the long focal length measurements.
authors.forename: Jia
authors.initials: J
authors.lastname: Luo
authors.forename: Jian
authors.initials: J
authors.lastname: Bai