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Updated: Jun 8, 2026

Large Volume, Behaviorally-relevant Illumination for Optogenetics in Non-human Primates
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Illumination artifacts in hyper-NA vector imaging.

Jun Zhang1, Yongsik Kim, Seung-Hune Yang

  • 1College of Optical Sciences, The University of Arizona, 1630 East University Boulevard, Tucson, Arizona 85721, USA. jzhangustcer@gmail.com

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|October 6, 2010
PubMed
Summary

Off-axis polarized monopole illumination in hyper-numerical-aperture (NA) microscopy causes asymmetric artifacts. Rigorous coupled wave theory simulations accurately predict these vector effect artifacts for various gratings and illumination conditions.

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Area of Science:

  • Optics and Photonics
  • Microscopy Techniques
  • Nanotechnology

Background:

  • Hyper-numerical-aperture (NA) microscopy enables sub-wavelength resolution imaging.
  • Vectorial nature of light illumination can introduce artifacts in high-NA systems.
  • Off-axis polarized illumination is explored for enhanced imaging capabilities.

Purpose of the Study:

  • To investigate and model illumination artifacts in hyper-NA microscopy using off-axis polarized monopole illumination.
  • To understand the impact of polarization states and monopole positions on image profiles.
  • To validate simulation models with experimental results from various sample types.

Main Methods:

  • Application of off-axis polarized monopole illumination to a hyper-NA microscope.

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  • Modeling image profiles using rigorous coupled wave theory (RCWT).
  • Experimental imaging of dielectric, semiconductor, and metal gratings using a solid immersion lens microscope.

    • Main Results:

    • Observed asymmetric illumination artifacts dependent on illumination conditions.
    • Simulated image profiles for different grating materials (dielectric, semiconductor, metal) showed good agreement with experimental data.
    • Monopole location and polarization state significantly influence artifact characteristics.

    Conclusions:

    • Off-axis polarized monopole illumination in hyper-NA systems introduces predictable vector-effect artifacts.
    • RCWT provides an accurate predictive model for these artifacts.
    • Experimental validation confirms the model's utility for characterizing imaging performance.