Iterative phase-shifting algorithm immune to random phase shifts and tilts

Yi Chun Chen, Po Chih Lin, Chung Min Lee, Chao Wen Liang

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


An iterative phase-shifting algorithm based on the least-squares principle is developed to overcome the random piston and tilt wavefront errors generated from the phase shifter. The algorithm iteratively calculates the phase distribution and the phase-shifting map to minimize the sum of squared errors in the interferograms. The performance of the algorithm is evaluated via computer simulations and validated by the Fizeau interferometer measurements. The results show that the proposed algorithm has a fast convergence rate and satisfactory phase-estimation accuracy, improving the measurement precision of the phase-shifting interferometers with significant phase-shifter errors.

Original languageEnglish
Pages (from-to)3381-3386
Number of pages6
JournalApplied Optics
Issue number14
StatePublished - 10 May 2013


Dive into the research topics of 'Iterative phase-shifting algorithm immune to random phase shifts and tilts'. Together they form a unique fingerprint.

Cite this