PUBLICATION

Computational refocusing of Jones matrix polarization-sensitive optical coherence tomography and investigation of defocus-induced polarization artifacts

Authors
Zhu, L., Makita, S., Oida, D., Miyazawa, A., Oikawa, K., Mukherjee, P., Lichtenegger, A., Distel, M., Yasuno, Y.
ID
ZDB-PUB-220702-2
Date
2022
Source
Biomedical Optics Express   13: 2975-2994 (Journal)
Registered Authors
Distel, Martin
Keywords
none
MeSH Terms
none
PubMed
35774308 Full text @ Biomed. Opt. Express
Abstract
Here we demonstrate a long-depth-of-focus imaging method using polarization sensitive optical coherence tomography (PS-OCT). This method involves a combination of Fresnel-diffraction-model-based phase sensitive computational refocusing and Jones-matrix based PS-OCT (JM-OCT). JM-OCT measures four complex OCT images corresponding to four polarization channels. These OCT images are computationally refocused as preserving the mutual phase consistency. This method is validated using a static phantom, postmortem zebrafish, and ex vivo porcine muscle samples. All the samples demonstrated successful computationally-refocused birefringence and degree-of-polarization-uniformity (DOPU) images. We found that defocusing induces polarization artifacts, i.e., incorrectly high birefringence values and low DOPU values, which are substantially mitigated by computational refocusing.
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