Experimental investigation of Gaussian random phase screen model for x-ray diffusers.

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Understanding beam diffusion is crucial for optical system design.
• Characterizing light scattering from diffusing materials requires accurate models.

Purpose of the Study:

• To experimentally evaluate the beam diffusing properties of stacked diffuser layers.
• To compare experimental results with a Gaussian random phase screen model.
• To assess the model's accuracy in describing angular scattering distributions.

Main Methods:

• Experimental evaluation of stacked diffuser layers.
• Comparison with a Gaussian random phase screen model incorporating a Lorentzian auto-correlation model.
• Analysis of angular scattering distribution as a function of layer count.

Main Results:

• The Gaussian random phase screen model showed promising accuracy.
• The model effectively described the tail behavior of the angular scattering distribution.
• Convincing description of the entire scattering distribution for amorphous carbon diffusers was achieved.

Conclusions:

• The Gaussian random phase screen model, combined with a Lorentzian auto-correlation, is a viable tool for predicting beam diffusion.
• The model's predictive power is particularly strong for the scattering distribution tails.
• Accurate modeling of light scattering from multi-layer diffusers is achievable.