{
  "abstract": "Full-field Fourier-domain optical coherence tomography (FF-FD-OCT) enables rapid volumetric imaging but lacks the confocal gating inherent to point-scanning OCT. By acquiring volumes under multiple oblique illuminations, a digital confocal volume can be synthesized in post-processing, a technique originally developed within the framework of reflection matrix imaging (RMI). Existing implementations, however, are often time-domain, off-axis, or use a Michelson interferometer, which reduces sensitivity, speed and the usable space-bandwidth product (SBP). Here, we present an oblique-illumination FF-FD-OCT system in a Mach-Zehnder configuration. This setup enables optimal use of SBP, providing up to a fourfold increase in effective acquisition throughput. In addition, we pose the scattering and aberrations as an overdetermined system, allowing a closed-form solution of an alternating least squares problem. The resulting iterative optimization is equivalent to the state-of-the-art closed-loop accumulation of single scattering (CLASS) algorithm. We demonstrate the setup and reconstruction method in lens tissue, a PSF phantom, a USAF target, and a model eye. The resulting digital confocal volumes provide locally optimized focusing and detection quality, and show improved resolution and signal-to-noise ratio (SNR) compared to conventional FF-FD-OCT. The technique combines the advantages of FF-FD-OCT and confocal OCT while mitigating the limitations of both approaches.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.06566",
  "author_total": 7,
  "authors": [
    {
      "name": "N. P. Klooster"
    },
    {
      "name": "S. A. Thakur"
    },
    {
      "name": "F. Zeisberger"
    },
    {
      "name": "J. R. Hagen"
    },
    {
      "name": "S. Eggert"
    },
    {
      "name": "U. Najar"
    },
    {
      "name": "D. Hillmann"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9x384799e7n13.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.06566",
  "fulltext_url": null,
  "id": "9x384799e7n13",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.06566",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.app-ph"
    ],
    [
      "arxiv",
      "physics.med-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "2204|Optical Coherence Tomography Applications"
    ]
  ],
  "openalex": "W7220727541",
  "pdf_url": "https://arxiv.org/pdf/2610.06566",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9x384799e7n13.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:01Z",
      "native_id": "2610.06566",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.06566"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.med-ph",
      "subfield": "biological-medical"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Digital confocal imaging in holographic optical coherence tomography at high space-bandwidth product",
  "title_text": "Digital confocal imaging in holographic optical coherence tomography at high space-bandwidth product",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:01Z",
  "url": "https://research.draconitic.com/paper/9x384799e7n13",
  "venue": "arXiv",
  "versions": []
}