THE ONE-STEP PHASE-SHIFTING TECHNIQUE FOR WAVE-FRONT INTERFEROMETRY

Authors
Citation
Tw. Ng, THE ONE-STEP PHASE-SHIFTING TECHNIQUE FOR WAVE-FRONT INTERFEROMETRY, J. mod. opt., 43(10), 1996, pp. 2129-2138
Citations number
7
Categorie Soggetti
Optics
Journal title
ISSN journal
09500340
Volume
43
Issue
10
Year of publication
1996
Pages
2129 - 2138
Database
ISI
SICI code
0950-0340(1996)43:10<2129:TOPTFW>2.0.ZU;2-6
Abstract
Hitherto, phase-shifting schemes in wave-front interferometry required a minimum of two precise phase steps in order to derive the phase. Th is paper outlines and demonstrates a novel technique entailing one pre cise phase step. Numerical analyses of phase-drift errors indicate tha t the proposed technique compares favourably with performances of the three- and four-bucket algorithms currently in use. Furthermore, it mi nimizes the period of computation by necessitating the use of three pr ocessing frames.