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Aberration characterization for the optimal design of high-resolution endoscopic optical coherence tomography catheters

机译:高分辨率内窥镜光学相干断层扫描导管的优化设计的像差表征

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摘要

We study the major factors causing degradation in the lateral resolution of gradient-index-lens-based catheters used for high-resolution optical coherence tomography. Chromatic aberration and astigmatism were taken into account in the propagation of broadband single-mode Gaussian beams through the catheter geometry. It was found that, while chromatic aberration did not preclude achieving high resolution, astigmatism posed a major technical difficulty, because its correction requires a very sensitive adjustment of parameters, especially for catheters with long working distances.
机译:我们研究了用于高分辨率光学相干断层扫描的基于梯度折射率透镜的导管横向分辨率下降的主要因素。宽带单模高斯光束通过导管几何形状传播时,应考虑色差和像散。已经发现,虽然色差并不能排除获得高分辨率,但是散光带来了主要的技术困难,因为其校正需要非常敏感的参数调整,尤其是对于长工作距离的导管。

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