Contrasts of the polarization difference projection images with linearly and circularly polarized lights

Nana Wang; Hanrong Shao; Yonghong He; Hui Ma

doi:10.1117/12.741113

1 May 2007 Contrasts of the polarization difference projection images with linearly and circularly polarized lights

Nana Wang, Hanrong Shao, Yonghong He, Hui Ma

Proceedings Volume 6534, Fifth International Conference on Photonics and Imaging in Biology and Medicine; 65340B (2007) https://doi.org/10.1117/12.741113
Event: Fifth International Conference on Photonics and Imaging in Biology and Medicine, 2006, Wuhan, China

Abstract

Polarization gating has been an attractive technique for optical imaging in turbid media. In this study, we investigate the polarization difference projection image (PDPI) in turbid media with linearly and circularly polarized lights. An iris is placed at the focal spot of the imaging optics to examine the influence of spatial filtering on imaging contrast. Polystyrene microsphere suspensions in Rayleigh and Mie domains are used as the phantoms. Scattering coefficient μ_s and anisotropy factor g are varied independently to obtain the quantitative relation between the PDPI contrasts and the optical properties of the phantom. We also compare the PDPI contrast with the contrast of degree of polarization (DOP). Primary results show that the PDPI contrast is better than DOP image contrast either in Rayleigh or Mie scattering domain. In the Mie scattering domain, linear and circular PDPI contrasts are compared for different scattering coefficients. We also discussed how Fourier spatial gating improves the image contrast. The results are compared with Monte Carlo simulation.

Citation Download Citation

Nana Wang, Hanrong Shao, Yonghong He, and Hui Ma "Contrasts of the polarization difference projection images with linearly and circularly polarized lights", Proc. SPIE 6534, Fifth International Conference on Photonics and Imaging in Biology and Medicine, 65340B (1 May 2007); https://doi.org/10.1117/12.741113

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KEYWORDS

Polarization

Scattering

Photons

Mie scattering

Rayleigh scattering

Light scattering

Monte Carlo methods

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