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Angle-based wavefront sensing enabled by the near fields of flat optics.

ABSTRACT: There is a long history of using angle sensors to measure wavefront. The best example is the Shack-Hartmann sensor. Compared to other methods of wavefront sensing, angle-based approach is more broadly used in industrial applications and scientific research. Its wide adoption is attributed to its fully integrated setup, robustness, and fast speed. However, there is a long-standing issue in its low spatial resolution, which is limited by the size of the angle sensor. Here we report a angle-based wavefront sensor to overcome this challenge. It uses ultra-compact angle sensor built from flat optics. It is directly integrated on focal plane array. This wavefront sensor inherits all the benefits of the angle-based method. Moreover, it improves the spatial sampling density by over two orders of magnitude. The drastically improved resolution allows angle-based sensors to be used for quantitative phase imaging, enabling capabilities such as video-frame recording of high-resolution surface topography.

SUBMITTER: Yi S

PROVIDER: S-EPMC8516895 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Angle-based wavefront sensing enabled by the near fields of flat optics.

Yi Soongyu S Xiang Jin J Zhou Ming M Wu Zhicheng Z Yang Lan L Yu Zongfu Z

Nature communications 20211014 1

There is a long history of using angle sensors to measure wavefront. The best example is the Shack-Hartmann sensor. Compared to other methods of wavefront sensing, angle-based approach is more broadly used in industrial applications and scientific research. Its wide adoption is attributed to its fully integrated setup, robustness, and fast speed. However, there is a long-standing issue in its low spatial resolution, which is limited by the size of the angle sensor. Here we report a angle-based w ...[more]

PMID: 34650050

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