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Measurement of multiple phase maps for wide-area aberration correction by switchable optical configuration
Optics Express ( IF 3.8 ) Pub Date : 2021-12-01 , DOI: 10.1364/oe.445062
Kwanjun Park , Taedong Kong , Taeseok Yang , Youngwoon Choi

We demonstrate a method of aberration correction for a wide field of view (FOV). To handle spatially varying aberrations, we divide the imaging FOV into multiple segments and determine the associated multiple phase maps (MPMs) that can compensate for the blurry focus. After applying the MPMs to the corresponding segment of the aberrated image, the entire field of view is recovered by recombining all of the image segments. The remaining spatial distortion is subsequently rectified using an inverse geometrical transformation (IGT) that can flatten the curved image space. To obtain information for aberration correction, our setup is designed to have a switchable configuration so that the MPMs and the IGT can be obtained by imaging the Fourier plane and the image plane, respectively. With these sequential processes, we can obtain an aberration-free image over an area of 937×937 µm2 at a microscopic resolution. In comparison, the degradation of the uniformity of the Strehl ratio over the entire FOV is 2.09 times lower than when using only a single PM. Because our method utilizes reflection geometry, it can potentially be used to mitigate the effect of aberrations in many existing imaging modalities.

中文翻译:

通过可切换光学配置测量用于广域像差校正的多相位图

我们展示了一种针对宽视场 (FOV) 的像差校正方法。为了处理空间变化的像差,我们将成像 FOV 分成多个部分,并确定可以补偿模糊焦点的相关多相位图 (MPM)。在将 MPM 应用于像差图像的相应片段后,通过重新组合所有图像片段来恢复整个视野。随后使用逆几何变换 (IGT) 纠正剩余的空间失真,该变换可以使弯曲的图像空间变平。为了获得像差校正的信息,我们的设置被设计为具有可切换的配置,以便可以通过分别对傅立叶平面和图像平面进行成像来获得 MPM 和 IGT。通过这些连续的过程,2显微分辨率。相比之下,整个 FOV 上 Strehl 比均匀性的下降比仅使用单个 PM 时低 2.09 倍。因为我们的方法利用反射几何,它可以潜在地用于减轻许多现有成像模式中的像差影响。
更新日期:2021-12-06
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