Simple and readily applicable k-linearization method based on diffraction angle difference

Hyungseo Jeon; Daewoon Seong; Hayoung Kim; Euimin Lee; Mansik Jeon; Jeehyun Kim

doi:10.1117/12.3002011

13 March 2024 Simple and readily applicable k-linearization method based on diffraction angle difference

Hyungseo Jeon, Daewoon Seong, Hayoung Kim, Euimin Lee, Mansik Jeon, Jeehyun Kim

Proceedings Volume 12854, Label-free Biomedical Imaging and Sensing (LBIS) 2024; 128540Q (2024) https://doi.org/10.1117/12.3002011
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

One common limitation of spectral-domain optical coherence tomography (SD-OCT) is the mismatch between line-scan camera pixels and the wavelength of the source spectrum, causing image thickening in deeper regions and compromising imaging quality. Various studies have addressed this issue by attempting to improve the alignment between camera pixels and wavelength, with a focus on mitigating the nonlinearity of wavenumbers in SD-OCT systems. To enhance signal quality in deeper imaging regions, several wavenumber linearization (k-linearization) methods have been explored. In our research, we have introduced a novel k-linearization approach based on the diffraction grating equation. The specifications of the light source in our SD-OCT system were utilized for algorithm simulation. Our method concentrated on the difference in diffraction angles at the diffraction grating within the spectrometer to determine the incident wavenumber per pixel. By applying the acquired k-index to our system, we observed an improvement in intensity roll-off and a reduction in the thickening of images in the high-frequency region of the sample. One notable advantage of our proposed method is its effectiveness in obtaining a suitable k-index for systems with simple specifications. Additionally, it can be easily tailored to meet the specific requirements of different systems. This ensures that our approach is not only innovative but also adaptable to diverse SD-OCT setups.

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

Citation Download Citation

Hyungseo Jeon, Daewoon Seong, Hayoung Kim, Euimin Lee, Mansik Jeon, and Jeehyun Kim "Simple and readily applicable k-linearization method based on diffraction angle difference", Proc. SPIE 12854, Label-free Biomedical Imaging and Sensing (LBIS) 2024, 128540Q (13 March 2024); https://doi.org/10.1117/12.3002011

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