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Virtual pyramid wavefront sensor for phase unwrapping

AuthorsAkondi, V. ; Vohnsen, B.; Marcos, Susana ; Marcos, Susana
Issue Date10-Oct-2016
PublisherOptical Society of America
CitationApplied Optics 55: 8363- 8367 (2016)
AbstractNoise affects wavefront reconstruction from wrapped phase data. A novel method of phase unwrapping is proposed with the help of a virtual pyramid wavefront sensor. The method was tested on noisy wrapped phase images obtained experimentally with a digital phase-shifting point diffraction interferometer. The virtuality of the pyramid wavefront sensor allows easy tuning of the pyramid apex angle and modulation amplitude. It is shown that an optimal modulation amplitude obtained by monitoring the Strehl ratio helps in achieving better accuracy. Through simulation studies and iterative estimation, it is shown that the virtual pyramid wavefront sensor is robust to random noise. © 2016 Optical Society of America
Description5 pags., 7 figs. ; OCIS codes: (010.1080) Active or adaptive optics; (010.7350) Wave-front sensing; (120.5050) Phase measurement; (280.4788) Optical sensing and sensors; (080.1010) Aberrations (global); (120.3180) Interferometry
Publisher version (URL)http://dx.doi.org/10.1364/AO.55.008363
Identifiersdoi: 10.1364/AO.55.008363
issn: 2155-3165
Appears in Collections:(CFMAC-IO) Artículos
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