用于共焦内窥的梯度折射率透镜的自适应像差校正。
Adaptive aberration correction of GRIN lenses for confocal endomicroscopy.
机构信息
Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 40 Blossom Street, Boston, Massachusetts 02114, USA.
出版信息
Opt Lett. 2011 Dec 1;36(23):4608-10. doi: 10.1364/OL.36.004608.
Abstract
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.
摘要
梯度折射率（GRIN）透镜因其直径小且易于组装而成为微型内窥镜的关键组件。然而，GRIN 透镜的非平面性会导致固有空间像差，从而降低图像分辨率和清晰度。在这里，我们介绍了 GRIN 探头中的像差诊断以及使用自适应光学来补偿内窥镜中的波前误差。展示了两种基于预设和原位测量的不同操作方案，都能将波前误差从 0.42 降低到<0.1 μm。
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