Influence of shot noise on phase measurement accuracy in digital holographic microscopy

Digital Holographic Microscopy (DHM) is a single shot interferometric technique, which provides quantitative phase images with subwavelength axial accuracy. A short hologram acquisition time (down to microseconds), allows DHM to offer a reduced sensitivity to vibrations, and real time observation is...

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Bibliographic Details
Published in:Optics express 2007-07, Vol.15 (14), p.8818-8831
Main Authors: Charrière, Florian, Rappaz, Benjamin, Kühn, Jonas, Colomb, Tristan, Marquet, Pierre, Depeursinge, Christian
Format: Article
Language:English
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Summary:Digital Holographic Microscopy (DHM) is a single shot interferometric technique, which provides quantitative phase images with subwavelength axial accuracy. A short hologram acquisition time (down to microseconds), allows DHM to offer a reduced sensitivity to vibrations, and real time observation is achievable thanks to present performances of personal computers and charge coupled devices (CCDs). Fast dynamic imaging at low-light level involves few photons, requiring proper camera settings (integration time and gain of the CCD; power of the light source) to minimize the influence of shot noise on the hologram when the highest phase accuracy is aimed. With simulated and experimental data, a systematic analysis of the fundamental shot noise influence on phase accuracy in DHM is presented.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.15.008818