Dynamic three-dimensional multifocal spots in high numerical-aperture objectives

LETO / LETO-3 Spatial Light Modulators
Beam Shaping / Beam Steering
Published on:
Authors: Linwei Zhu and Rui Yang and Dawei Zhang and Junjie Yu and Jiannong Chen
Abstract:

“Multifocal spots in high numerical-aperture (NA) objectives has emerged as a rapid, parallel, and multi-location method in a multitude of applications. However, the typical method used for forming three-dimensional (3D) multifocal spots based on iterative algorithms limits the potential applications. We demonstrate a non-iterative method using annular subzone phases (ASPs) that are composed of many annular subareas in which phase-only distributions with different 3D displacements are filled. The dynamic 3D multifocal spots with controllable position of each focal spot in the focal volume of the objective are created using the ASPs. The experimental results of such dynamic tunable 3D multifocal spots offer the possibility of versatile process in laser 3D fabrication, optical trapping, and fast focusing scanned microscopic imaging.”

Open Access

Publication: Optics Express
Issue/Year: Optics Express, Vol. 25, Issue 20, pp. 24756- 24766 (2018)
DOI: 10.1364/OE.25.024756
Link: https://doi.org/10.1364/OE.25.024756

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