Optimization of time-domain full-field optical coherence tomography with digital confocal line-scanning

Danielis Rutkauskas; Egidijus Auksorius

doi:10.1117/12.2670591

11 August 2023 Optimization of time-domain full-field optical coherence tomography with digital confocal line-scanning

Proceedings Volume 12632, Optical Coherence Imaging Techniques and Imaging in Scattering Media V; 126321S (2023) https://doi.org/10.1117/12.2670591
Event: European Conferences on Biomedical Optics, 2023, Munich, Germany

Abstract

The absence of confocal gating in full-field Optical Coherence Tomography (OCT) worsens its dynamic range and thereby the sensitivity and signal to background noise ratio because of the inability to reject the out-of-focus and other incoherent light. Here, we present a simple and affordable confocal line scanning implementation that significantly reduces the incoherent light. We realize a fully digital line scanning that contains no moving parts, by exploiting a Digital Mirror Device (DMD) in combination with a CMOS camera running in the rolling shutter mode. An improvement of the signal to noise ratio due to the confocal line-scanning by at least an order of magnitude was demonstrated on a sample composed of the USAF target mounted behind a scattering layer. We also imaged a sample of onion epidermis with an incoherent reflector.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Danielis Rutkauskas and Egidijus Auksorius "Optimization of time-domain full-field optical coherence tomography with digital confocal line-scanning", Proc. SPIE 12632, Optical Coherence Imaging Techniques and Imaging in Scattering Media V, 126321S (11 August 2023); https://doi.org/10.1117/12.2670591

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