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Depth sectioning of attenuation.

Keith Dillon1, Yeshaiahu Fainman

  • 1Department of Electrical and Computer Engineering, University of California-San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA. kdillon@ucsd.edu

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|May 29, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a computational imaging method for analyzing sample attenuation using Fourier plane measurements. The technique offers a simpler, faster alternative to conventional confocal microscopy for imaging optical properties.

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Area of Science:

  • Optical imaging
  • Computational microscopy
  • Tomographic reconstruction

Background:

  • Conventional confocal microscopy assumes independent scatterers, limiting analysis of sample attenuation.
  • Accurate imaging of attenuative sample parameters requires a tomographic approach.

Purpose of the Study:

  • To develop a computational imaging approach for analyzing attenuative sample parameters.
  • To enable pixel-by-pixel estimation of attenuation and occlusion using Fourier plane measurements.

Main Methods:

  • Utilizes computational processing of Fourier plane measurements, bypassing traditional pinhole detection.
  • Derives a simple estimator requiring minimal computation for tomographic analysis.
  • Demonstrates principles using two-dimensional numerical simulations.

Main Results:

  • The proposed method provides a computationally efficient alternative to conventional pinhole estimates.
  • Successfully images attenuation parameters and occlusion with incoherent detection.
  • Capable of imaging refractive index variation with coherent detection.

Conclusions:

  • The novel approach allows for potentially video-rate imaging of sample attenuation.
  • Mitigates issues from unknown gain or phase values by computationally imaging off-focus planes.
  • Offers a versatile tool for optical imaging and metrology.