Analysis of the impact of optical aberrations in en-face full-field OCT microscopy - Archive ouverte HAL
Article Dans Une Revue Optics Express Année : 2021

Analysis of the impact of optical aberrations in en-face full-field OCT microscopy

Résumé

Optical coherence tomography (OCT) is a powerful technique for cross-sectioning imaging. However, the lateral resolution may be degraded by optical aberrations originating from the sample or the setup. We present an extensive quantitative study of the impact of aberrations in time-domain en-face full-field OCT (FFOCT). Using an adaptive optics loop integrated in an FFOCT setup, a deformable mirror is used to introduce low-order calibrated aberrations. The experimental analysis of both the line spread functions (SF) and the complex object images has allowed us to measure the loss in contrast and the impact on lateral spatial resolution. We demonstrate that the frequency content of FFOCT image spectra in terms of signal-to-noise ratio and cutoff frequency is degraded by aberrations but remains much higher than in conventional incoherent images. Line SF profiles in conventional imaging display widening, whereas in FFOCT they display oscillations, leading to the possible perception of preserved resolution. Nevertheless, for complex objects, the aberration image blurring is strong due to the convolution process by the point SF, resulting in a significant filtering of the image spatial spectrum.
Fichier principal
Vignette du fichier
oe-29-2-2204.pdf (5.9 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03965462 , version 1 (18-12-2023)

Licence

Identifiants

Citer

Marie Blavier, Marie Glanc, Gérard Rousset. Analysis of the impact of optical aberrations in en-face full-field OCT microscopy. Optics Express, 2021, 29 (2), pp.2204. ⟨10.1364/OE.403432⟩. ⟨hal-03965462⟩
44 Consultations
24 Téléchargements

Altmetric

Partager

More