Optical coherence tomography with enhanced depth of focus using metalens

Xueqing Ding; Fan Fan; Yiming Wang; Wenchang Zhang; Jiang Zhu

doi:10.1117/12.3036318

20 November 2024 Optical coherence tomography with enhanced depth of focus using metalens

Xueqing Ding, Fan Fan, Yiming Wang, Wenchang Zhang, Jiang Zhu

Author Affiliations +

Proceedings Volume 13242, Optics in Health Care and Biomedical Optics XIV; 1324225 (2024) https://doi.org/10.1117/12.3036318
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

Optical coherence tomography (OCT) is widely used in ophthalmology and has been a standard method for diagnosing ocular diseases. Improving spatial resolution is crucial for the visualization of ocular microstructure. In conventional OCT systems, enhanced transverse resolution typically results in a reduction of depth of field (DOF). In our study, we designed four metalenses with different microstructures and then integrated them into the sample arm of an OCT imaging system. The metalens can modulate the amplitude and the phase of incident light in the sample. In this way, the depth of focus in the OCT system can be effectively enhanced while maintaining the transverse resolution. Also, the impact of different parameters, such as the size and the spacing of micro-units, has been discussed for OCT imaging. Finally, the experiment on the glass slides has been conducted to validate the performance of OCT imaging. The results demonstrate that the metalens with a specific microstructure could effectively enhance the DOF of OCT imaging. Furthermore, the enhanced depth of focus of the OCT system opens up new opportunities for investigating tissue morphology and function.

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

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Xueqing Ding, Fan Fan, Yiming Wang, Wenchang Zhang, and Jiang Zhu "Optical coherence tomography with enhanced depth of focus using metalens", Proc. SPIE 13242, Optics in Health Care and Biomedical Optics XIV, 1324225 (20 November 2024); https://doi.org/10.1117/12.3036318

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