ORCID

Abstract

The modal analog holographic wavefront sensor (AHWFS) is a low-cost and high-speed solution for wavefront sensing. It uses a phase biasing approach, where a pair of holograms are biased with a known phase delay/advance. The aberration magnitude is determined by measuring the diffracted beam intensities from the hologram pair. Both thin and volume phase transmission holograms can be used. Thin gratings produce multiple diffracted orders, while volume gratings direct light into a single order. Sensor response is measured using photodiodes or cameras, though thin holograms require a small region of interest for sensitivity to changing aberration magnitudes. This work compares response calculation methods, based on both an integrated intensity and, a weighted average and thresholding method, for thin and volume holograms recorded in self-developing photopolymer film. In particular, we focus on analysing the performance of both methods under emulated atmospheric turbulence conditions.

Keywords

adaptive optics, Holographic wavefront sensor, holography, wavefront sensing

Publication Date

2025-10-27

Event

8th Environmental Effects on Light Propagation and Adaptive Systems

Publication Title

Environmental Effects on Light Propagation and Adaptive Systems VIII

Publisher

SPIE

ISBN

9781510692770

ISSN

0277-786X

Deposit Date

2026-02-25

Funding

This work was funded by Taighde Éireann - Research Ireland under grant award 18/SIRG/5666. The authors would like to acknowledge the Physical to Life Sciences Hub and Fraunhofer IOSB for equipment and technical support.

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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