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Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

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Two-dimensional freeform reflector design with a scattering surface.

Vì C E Kronberg, Martijn J H Anthonissen, Jan H M Ten Thije Boonkkamp

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|May 3, 2023

Summary

Designing reflectors with scattering surfaces is simplified. By modeling surface roughness with microfacets, we developed a method to compute reflector shapes, with scattering causing minor radius differences.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Freeform reflector design is crucial for light manipulation.
Surface roughness, modeled as microfacets, affects light scattering.
Solving inverse problems is key in optical system design.

Purpose of the Study:

To develop a computational method for designing reflectors with scattering surfaces.
To integrate microfacet scattering models into freeform reflector design.
To analyze the impact of surface scattering on reflector geometry.

Main Methods:

Combined two-dimensional freeform reflector design with microfacet surface scattering models.
Formulated scattered light intensity using a convolution integral.
Employed deconvolution to transform the problem into a standard inverse specular design problem.

Main Results:

The scattering surface model resulted in a convolution integral for light intensity.
Deconvolution enabled solving an inverse specular problem.
Surface scattering introduced a few percentage difference in reflector radius, varying with scattering amount.

Conclusions:

A novel method allows computation of reflector shapes with scattering surfaces.
The approach simplifies the design of optical components with controlled roughness.
Understanding scattering effects is important for precise reflector design.