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 SPIE
PDF ArticleMore Like This
Arnaud Dubois
DTu2A.1 Bio-Optics: Design and Application (BODA) 2023
Si Chen, Kan Lin, Xi Chen, and Linbo Liu
126321K European Conference on Biomedical Optics (ECBO) 2023
Jonas Ogien, Olivier Levecq, Anthony Daures, and Arnaud Dubois
126320F European Conference on Biomedical Optics (ECBO) 2023