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Summary
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This study presents a simplified full-field optical coherence tomography (FFOCT) system using a liquid crystal spatial light modulator (LCSLM) for aberration correction. Aberrations were corrected using an image-based algorithm, improving image quality in biological samples.

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Area of Science:

  • Biomedical Optics
  • Optical Engineering
  • Microscopy

Background:

  • Aberrations degrade image quality in optical systems.
  • Full-field optical coherence tomography (FFOCT) offers label-free imaging capabilities.
  • Liquid crystal spatial light modulators (LCSLMs) can dynamically control wavefronts.

Purpose of the Study:

  • To develop a simplified FFOCT system for aberration correction.
  • To investigate the impact of aberrations on FFOCT resolution.
  • To demonstrate aberration correction using an image-based optimization algorithm.

Main Methods:

  • A compact FFOCT setup was designed, omitting strict pupil conjugation.
  • A transmissive LCSLM was integrated for aberration induction and correction.
  • An image-based algorithm utilizing FFOCT image intensity was employed for optimization.
  • Aberration correction was validated using a USAF resolution target and biological samples.

Main Results:

  • Image resolution was found to be largely insensitive to aberrations that primarily reduce signal intensity.
  • The image-based algorithm successfully corrected both LCSLM-induced and sample-induced wavefront distortions.
  • Improved image quality was demonstrated in biological samples after aberration correction.

Conclusions:

  • A simplified FFOCT system with LCSLM-based aberration correction is effective.
  • Image intensity serves as a reliable metric for aberration correction in FFOCT.
  • This approach enhances the robustness and applicability of FFOCT for biological imaging.