Theoretical consideration of maximum numerically correctable defocus of point-scanning and full-field optical coherence tomography

Yue Zhu; Shuichi Makita; Yoshiaki Yasuno

doi:10.1117/12.2692849

12 March 2024 Theoretical consideration of maximum numerically correctable defocus of point-scanning and full-field optical coherence tomography

Yue Zhu, Shuichi Makita, Yoshiaki Yasuno

Author Affiliations +

Proceedings Volume 12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII; 1283008 (2024) https://doi.org/10.1117/12.2692849
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

Defocus in OCT can be removed by computational refocusing but with certain limitations. We theoretically investigate the limitations of the computational refocusing for standard point-scanning OCT and spatially coherence full-field OCT (SC-FFOCT). The Nyquist limit of the image sampling and the confocality define the maximum correctable defocus (MCD). The Nyquist limit becomes non-effectual limit with reasonable oversampling to the optical lateral resolution. The confocality is the main limiting factor of MCD for point-scanning OCT, while the SC-FFOCT does not have this limitation. SC-FFOCT was found to have virtually infinitely large MCD and is particularly suitable for optical coherence microscopy.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yue Zhu, Shuichi Makita, and Yoshiaki Yasuno "Theoretical consideration of maximum numerically correctable defocus of point-scanning and full-field optical coherence tomography", Proc. SPIE 12830, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVIII, 1283008 (12 March 2024); https://doi.org/10.1117/12.2692849

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