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Combination of Annular Aperture and Polarization Gating Methods for Efficient Microscopic Imaging through a Turbid Medium: Theoretical Analysis

Published online by Cambridge University Press:  31 January 2003

X. Gan ,
S. Schilders  and
M. Gu
X. Gan
Affiliation:
Optoelectronic Imaging Group, Department of Applied Physics, Victoria University of Technology, P.O. Box 14428, MCMC, Victoria 8001, Australia
S. Schilders
Affiliation:
Optoelectronic Imaging Group, Department of Applied Physics, Victoria University of Technology, P.O. Box 14428, MCMC, Victoria 8001, Australia
M. Gu
Affiliation:
Optoelectronic Imaging Group, Department of Applied Physics, Victoria University of Technology, P.O. Box 14428, MCMC, Victoria 8001, Australia
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Abstract

Abstract: In this study, we investigate the principle of the annular aperture and polarization gating methods for microscopic imaging through a turbid medium using images simulated by a modified Monte Carlo program. Significant improvement in image quality is shown when thin annular apertures are used in the illumination and detection paths of a microscopic imaging system. The polarization gating method is proven to be an efficient gating method for selecting ballistic photons that carry the information of an object embedded in a turbid medium. We also demonstrate that the combination of the annular aperture and polarization gating methods is highly efficient in suppressing the scattered light in microscopic imaging through a turbid medium. It is also revealed that a pinhole used in a confocal microscope plays an independent angle-gating role.

Type
Research Article
Information
Microscopy and Microanalysis , Volume 3 , Issue 6 , November 1997 , pp. 495 - 503
Copyright
2001 Cambridge University Press

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