Work

Time-Domain Full-Field Confocal Optical Coherence Tomography with Digital Scanning

Year: 2025

Type: article

Abstract: Full-field optical coherence tomography (FF-OCT) is a fast, en face interferometric technique that allows imaging inside a scattering tissue with high spatial resolution. However, camera-based detection, which lacks confocal gating, results in a suboptimal signal-to-noise ratio (SNR). To address this, we implemented a time-domain FF-OCT system that uses a digital micromirror device (DMD). The DMD allows us to scan multiple illumination spots across the sample and simultaneously realize confocal detection with multiple pinholes. Confocal imaging can also be demonstrated with line illumination and detection. Using a USAF target mounted behind a scattering layer, we demonstrate an order-of-magnitude improvement in SNR.

Source: Photonics

DOI: 10.3390/photonics12040304

Authors: Danielis Rutkauskas, Karolis Adomavičius, Egidijus Auksorius

Institution: Center for Physical Sciences and Technology

Language: English

Topic: Optical Coherence Tomography Applications

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funder: Lietuvos Mokslo Taryba