4.6 Article

Multispectral small-angle light scattering from particles

Journal

OPTICS LETTERS
Volume 46, Issue 13, Pages 3155-3158

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OL.427580

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Funding

  1. ONERA
  2. French Aerospace Lab (PROMETE project)
  3. National Science Foundation [1665456]
  4. Air Force Office of Scientific Research [FA9550-19-1- 0078]
  5. Army Research Office [W911NF2120053]
  6. Light-scattering project (BUAP University project)

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The study utilizes a supercontinuum laser and a spatial filter to measure two-dimensional small-angle light-scattering patterns for various microparticles. The measurements are performed at 13 wavelengths to demonstrate qualitative particle-material sensitivity and the multispectral capability of the device.
Using a supercontinuum laser, reflective optics, and a spatial filter, we measure two-dimensional small-angle light-scattering patterns for a variety of microparticles including spheres, salt, sand, and volcanic dust. The measurements are done at 13 wavelengths from 450-850 nm, where the absence of refractive optical elements minimizes the effects of chromatic aberration. Qualitative particle-material sensitivity is demonstrated by layering differently colored patterns. Last, the multispectral capability of our device demonstrates a new possibility to probe different q-space regimes for a given particle in a single measurement. (C) 2021 Optical Society of America

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