Polarization and Geometric Dependencies of the IPL Point in Turbid Media

Daniel Himelstein; Hamootal Duadi; Dror Fixler

doi:10.1117/12.3078367

Polarization and Geometric Dependencies of the IPL Point in Turbid Media

Daniel Himelstein
, Hamootal Duadi
, Dror Fixler

Bar-Ilan University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Polarimetry offers powerful non-invasive sensing capabilities in turbid media, though multiple scattering often complicates signal analysis. This study investigates the polarization dependence of the iso-pathlength (IPL) point, a geometric feature invariant to scattering coefficients. Using linearly polarized light and Stokes-vector-based Monte Carlo simulations, we demonstrate that the IPL location shifts predictably based on detection orientation. Specifically, in a 10 mm cylinder, the IPL angle follows a distinct behavior for cross - polarized, unpolarized, and co - polarized states. Experimental results confirm that this IPL angle scales linearly with tube diameter across all polarization components, offering a robust framework for isolating optical properties in complex cylindrical geometries.

Original language	English
Title of host publication	Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XXIII
Editors	Dror Fixler, Sebastian Wachsmann-Hogiu
Publisher	SPIE
ISBN (Electronic)	9781510696471
DOIs	https://doi.org/10.1117/12.3078367
State	Published - 5 Mar 2026
Event	2026 23rd Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications - San Francisco, United States Duration: 18 Jan 2026 → 20 Jan 2026

Publication series

Name	Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume	13867
ISSN (Print)	1605-7422
ISSN (Electronic)	2410-9045

Conference

Conference	2026 23rd Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications
Country/Territory	United States
City	San Francisco
Period	18/01/26 → 20/01/26

Bibliographical note

Publisher Copyright:
© 2026 SPIE. All rights reserved.

Keywords

Cross-polarization
Mie scattering
Monte Carlo simulation
Non-invasive sensing
Stokes vector formalism

Access to Document

10.1117/12.3078367

Cite this

Himelstein, D., Duadi, H., & Fixler, D. (2026). Polarization and Geometric Dependencies of the IPL Point in Turbid Media. In D. Fixler, & S. Wachsmann-Hogiu (Eds.), Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XXIII Article 1386707 (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 13867). SPIE. https://doi.org/10.1117/12.3078367

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title = "Polarization and Geometric Dependencies of the IPL Point in Turbid Media",

abstract = "Polarimetry offers powerful non-invasive sensing capabilities in turbid media, though multiple scattering often complicates signal analysis. This study investigates the polarization dependence of the iso-pathlength (IPL) point, a geometric feature invariant to scattering coefficients. Using linearly polarized light and Stokes-vector-based Monte Carlo simulations, we demonstrate that the IPL location shifts predictably based on detection orientation. Specifically, in a 10 mm cylinder, the IPL angle follows a distinct behavior for cross - polarized, unpolarized, and co - polarized states. Experimental results confirm that this IPL angle scales linearly with tube diameter across all polarization components, offering a robust framework for isolating optical properties in complex cylindrical geometries.",

keywords = "Cross-polarization, Mie scattering, Monte Carlo simulation, Non-invasive sensing, Stokes vector formalism",

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Himelstein, D, Duadi, H & Fixler, D 2026, Polarization and Geometric Dependencies of the IPL Point in Turbid Media. in D Fixler & S Wachsmann-Hogiu (eds), Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XXIII., 1386707, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 13867, SPIE, 2026 23rd Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications, San Francisco, United States, 18/01/26. https://doi.org/10.1117/12.3078367

Polarization and Geometric Dependencies of the IPL Point in Turbid Media. / Himelstein, Daniel; Duadi, Hamootal; Fixler, Dror.
Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XXIII. ed. / Dror Fixler; Sebastian Wachsmann-Hogiu. SPIE, 2026. 1386707 (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 13867).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - Polarimetry offers powerful non-invasive sensing capabilities in turbid media, though multiple scattering often complicates signal analysis. This study investigates the polarization dependence of the iso-pathlength (IPL) point, a geometric feature invariant to scattering coefficients. Using linearly polarized light and Stokes-vector-based Monte Carlo simulations, we demonstrate that the IPL location shifts predictably based on detection orientation. Specifically, in a 10 mm cylinder, the IPL angle follows a distinct behavior for cross - polarized, unpolarized, and co - polarized states. Experimental results confirm that this IPL angle scales linearly with tube diameter across all polarization components, offering a robust framework for isolating optical properties in complex cylindrical geometries.

AB - Polarimetry offers powerful non-invasive sensing capabilities in turbid media, though multiple scattering often complicates signal analysis. This study investigates the polarization dependence of the iso-pathlength (IPL) point, a geometric feature invariant to scattering coefficients. Using linearly polarized light and Stokes-vector-based Monte Carlo simulations, we demonstrate that the IPL location shifts predictably based on detection orientation. Specifically, in a 10 mm cylinder, the IPL angle follows a distinct behavior for cross - polarized, unpolarized, and co - polarized states. Experimental results confirm that this IPL angle scales linearly with tube diameter across all polarization components, offering a robust framework for isolating optical properties in complex cylindrical geometries.

KW - Cross-polarization

KW - Mie scattering

KW - Monte Carlo simulation

KW - Non-invasive sensing

KW - Stokes vector formalism

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Polarization and Geometric Dependencies of the IPL Point in Turbid Media

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Keywords

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