Comparative performance of line-scanning SD-OCT versus free-space and fiber-based flying-spot SD-OCT.

IF 3.3 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2025-09-08 DOI:10.1364/OE.576201
Yueqing Wu, Mingliang Wang, Jie Liu, Yi Chen, Jiayi Zhang, Fangjian Xing, Yunsong Di, Zhixing Gan, Cihui Liu
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引用次数: 0

Abstract

Line-scanning spectral-domain optical coherence tomography (LS-SD-OCT) is an alternative OCT configuration that enables parallel illumination and detection along the fast scanning axis, thereby eliminating the need for mechanical scanning in that direction. This feature makes LS-SD-OCT particularly suitable for high-throughput imaging applications. In such systems, the sample is illuminated by a focused line-shaped beam, which necessitates a free-space optical setup to relay the beam onto the image plane and to capture B-scans using a two-dimensional (2D) camera. However, this configuration presents inherent challenges: object points at different depths experience defocus, and scattered photons from adjacent A-scan channels can lead to crosstalk. These effects degrade resolution and reduce the clarity of both en-face and cross-sectional images. In this work, we quantitatively evaluate the imaging performance of LS-SD-OCT by constructing the point spread function (PSF) along the fast axis, taking into account both defocus and scattering in adhesive tape and onion samples. The results are systematically compared with those from free-space flying-spot SD-OCT(FS-SD-OCT) and fiber-based FS-SD-OCT systems. Our findings indicate that the image quality of LS-SD-OCT is inferior to that of FS-SD-OCT systems, offering practical insights for future enhancements of the LS-SD-OCT technique.

线扫描SD-OCT与自由空间和基于光纤的飞点SD-OCT的性能比较。
线扫描光谱域光学相干断层扫描(LS-SD-OCT)是另一种OCT配置,可以沿快速扫描轴平行照明和检测,从而消除了在该方向上进行机械扫描的需要。这一特性使得LS-SD-OCT特别适合高通量成像应用。在这样的系统中,样品被聚焦的线形光束照射,这需要一个自由空间光学装置来将光束传递到图像平面上,并使用二维(2D)相机捕捉b扫描。然而,这种配置存在固有的挑战:不同深度的物体点会出现散焦,并且来自相邻a扫描通道的散射光子会导致串扰。这些影响降低了分辨率,降低了正面和横截面图像的清晰度。在这项工作中,我们通过构建沿快速轴的点扩散函数(PSF)来定量评估LS-SD-OCT的成像性能,同时考虑胶带和洋葱样品中的散焦和散射。系统地比较了自由空间飞点SD-OCT(FS-SD-OCT)和基于光纤的FS-SD-OCT系统的结果。我们的研究结果表明,LS-SD-OCT的图像质量不如FS-SD-OCT系统,为LS-SD-OCT技术的未来增强提供了实用的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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