Lateral light scattering in fibrous media

Area of Science:

• Optics and Photonics
• Materials Science
• Computational Modeling

Background:

• Lateral light scattering in fibrous media like paper is crucial for optical properties.
• Existing models often simplify scattering behavior, limiting accuracy in predicting light diffusion.

Purpose of the Study:

• To investigate lateral light scattering in paper using a novel Monte Carlo model.
• To compare simulation results with experimental measurements and simpler scattering models.

Main Methods:

• A Monte Carlo model was developed using phase functions from aligned, homogenous cylinders to simulate paper's directional inhomogeneity.
• The modulation transfer function (MTF) was computed for 22 paper samples.
• Simulation results were compared against experimental data and models with isotropic and forward scattering.

Main Results:

• The model incorporating conical scattering from cylinders predicted greater lateral light scattering than rotationally invariant models.
• Simulated lateral scattering did not fully replicate the extent observed in physical measurements.
• The study highlights limitations in current models for accurately capturing paper's complex light scattering.

Conclusions:

• Conical scattering from aligned cylinders is a significant factor in lateral light scattering in paper.
• The model suggests that fiber lumen structures and dependent scattering effects are essential for a complete understanding.
• Further refinement of models is necessary to match experimental observations of light scattering in paper.