Virtual pyramid wavefront sensor for phase unwrapping

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Title: Virtual pyramid wavefront sensor for phase unwrapping
Authors: Akondi, VyasVohnsen, BrianMarcos, Susana
Permanent link: http://hdl.handle.net/10197/13062
Date: 10-Oct-2016
Online since: 2022-08-15T16:22:51Z
Abstract: Noise 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.
Funding Details: European Commission - Seventh Framework Programme (FP7)
European Research Council
Science Foundation Ireland -- replace
University College Dublin
Funding Details: Consejería de Educación, Juventud y Deporte of Comunidad de Madrid
Spanish Government Grant
Type of material: Journal Article
Publisher: Optica
Journal: Applied Optics
Volume: 55
Issue: 29
Start page: 8363
End page: 8367
Copyright (published version): 2016 Optical Society of America
Keywords: Active or adaptive opticsWave-front sensingPhase measurementOptical sensing and sensorsAberrationsNoise in imaging systemsInterferometry
DOI: 10.1364/AO.55.008363
Language: en
Status of Item: Peer reviewed
ISSN: 1559-128X
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Physics Research Collection

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