Adaptive aberration correction of GRIN lenses for confocal endomicroscopy.
Adaptive aberration correction of GRIN lenses for confocal endomicroscopy.
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DOI：
10.1364/ol.36.004608
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发表时间：
2011-12-01
期刊：
影响因子：
3.6
通讯作者：
Yun SH
中科院分区：
文献类型：
--
作者：
Lee WM;Yun SH
梯度折射率透镜（GRIN）是微型内窥镜的关键部件，因为它们的直径小，易于组装。然而，GRIN透镜的非平面化性质会导致固有的空间像差，降低图像分辨率和清晰度。在这里，我们提出了诊断像差在GRIN探针和使用自适应光学来补偿波前误差在内窥镜。本文演示了两种不同的操作方案，分别基于预置和原位测量，这两种方案都将波前误差从0.42大幅降低到<0.1 μm。
Graded-index (GRIN) lenses serve as a key component for miniature endoscopes because of their small diameters and ease of assembly. However, the nonaplanatic nature of GRIN lenses causes inherent spatial aberrations that lower image resolution and sharpness. Here we present the diagnosis of the aberrations in GRIN probes and the use of adaptive optics to compensate for the wavefront errors in the endoscope. Two different operation schemes based on preset and in situ measurements are demonstrated, both resulting in a substantial reduction of the wavefront error from 0.42 to <0.1 μm.