带薄扩散器的复用波前传感技术

IF 8.4 1区 物理与天体物理 Q1 OPTICS
Optica Pub Date : 2024-02-16 DOI:10.1364/optica.500780
Tengfei Wu, Marc Guillon, Gilles Tessier, and Pascal Berto
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引用次数: 0

摘要

在天文学或生物成像中,大气或组织等的折射率不均匀会导致光学像差,从而降低隐藏在介质背后的所需信息的质量。标准的方法是使用位于瞳孔平面的波前传感器(如夏克-哈特曼波前传感器)测量这些像差,并通过数字方式或使用波前整形器的自适应光学技术对其进行补偿。然而,在通常情况下,这种策略只能提取单个等平面斑块内的像差,即像差保持相关的区域。这一限制严重缩小了可进行校正的有效视场。在这里,我们提出了一种波前传感方法,能够一次性测量与多个等平面光斑相对应的各种瞳孔像差。该方法以薄扩散器(即随机相位掩模)为基础,利用不同斑点区域之间的差异,复用从不同入射角入射的多个波阵面。我们介绍了在宽场荧光显微镜中进行的概念验证实验。在每个等平面补丁中的数字解卷积程序可在扩展视场内产生精确的像差校正。这种方法适用于自适应光学应用以及衍射光学层析成像。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiplexed wavefront sensing with a thin diffuser
In astronomy or biological imaging, refractive index inhomogeneities of, e.g., atmosphere or tissues, induce optical aberrations that degrade the desired information hidden behind the medium. A standard approach consists of measuring these aberrations with a wavefront sensor (e.g., Shack–Hartmann) located in the pupil plane, and compensating for them either digitally or by adaptive optics with a wavefront shaper. However, in its usual implementation this strategy can only extract aberrations within a single isoplanatic patch, i.e., a region where the aberrations remain correlated. This limitation severely reduces the effective field-of-view in which the correction can be performed. Here, we propose a wavefront sensing method capable of measuring, in a single shot, various pupil aberrations corresponding to multiple isoplanatic patches. The method, based on a thin diffuser (i.e., a random phase mask), exploits the dissimilarity between different speckle regions to multiplex several wavefronts incoming from various incidence angles. We present proof-of-concept experiments carried out in widefield fluorescence microscopy. A digital deconvolution procedure in each isoplanatic patch yields accurate aberration correction within an extended field-of-view. This approach is of interest for adaptive optics applications as well as diffractive optical tomography.
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来源期刊
Optica
Optica OPTICS-
CiteScore
19.70
自引率
2.90%
发文量
191
审稿时长
2 months
期刊介绍: Optica is an open access, online-only journal published monthly by Optica Publishing Group. It is dedicated to the rapid dissemination of high-impact peer-reviewed research in the field of optics and photonics. The journal provides a forum for theoretical or experimental, fundamental or applied research to be swiftly accessed by the international community. Optica is abstracted and indexed in Chemical Abstracts Service, Current Contents/Physical, Chemical & Earth Sciences, and Science Citation Index Expanded.
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