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Scattering And Absorption of Light in Planetary Regoliths

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Published on: July 1, 2019

Iterative, backscatter-analysis algorithms for increasing transmission and focusing light through highly scattering

Curtis Jin, Raj Rao Nadakuditi, Eric Michielssen

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

|December 11, 2013

Summary

Researchers found specific light patterns that can pass through scattering materials, improving optical imaging. Algorithms using backscatter analysis rapidly optimize these patterns for better light transmission.

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

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Published on: May 20, 2013

Area of Science:

Optics and Photonics
Wave Phenomena in Disordered Media

Background:

Light scattering in random media impedes optical sensing and imaging.
Previous work suggested highly transmitting eigen-wavefronts in backscattering media.

Purpose of the Study:

To numerically confirm the existence of highly transmitting eigen-wavefronts.
To develop algorithms for enhancing light transmission using backscatter analysis, especially for bio-imaging.
To improve focusing techniques by combining backscatter analysis with intensity measurements.

Main Methods:

2D numerical simulations with spectrally accurate solvers.
Analysis of random media with periodic boundary conditions and numerous scatterers.
Development of physically realizable algorithms based on backscatter analysis.

Main Results:

Rigorous numerical evidence confirms the existence of highly transmitting eigen-wavefronts.
Developed algorithms rapidly converge to near-optimum wavefronts in few iterations.
Combined approach significantly reduces measurements needed for optimal focusing.

Conclusions:

Highly transmitting eigen-wavefronts exist and can be optimized in random media.
Backscatter analysis provides a viable method for wavefront optimization in challenging imaging scenarios.
The developed algorithms offer practical solutions for enhanced light transmission and focusing in scattering environments.