Meta Shack-Hartmann wavefront sensor with large sampling density and large angular field of view: phase imaging of complex objects.

ABSTRACT: Shack-Hartmann wavefront sensors measure the local slopes of an incoming wavefront based on the displacement of focal spots created by a lenslet array, serving as key components for adaptive optics for astronomical and biomedical imaging. Traditionally, the challenges in increasing the density and the curvature of the lenslet have limited the use of such wavefront sensors in characterizing slowly varying wavefront structures. Here, we develop a metasurface-enhanced Shack-Hartmann wavefront sensor (meta SHWFS) to break this limit, considering the interplay between the lenslet parameters and the performance of SHWFS. We experimentally validate the meta SHWFS with a sampling density of 5963 per mm² and a maximum acceptance angle of 8° which outperforms the traditional SFWFS by an o

SUBMITTER: Go GH 

PROVIDER: S-EPMC11319597 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature