Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Improving sub-pixel shifts estimation in a Shack–Hartmann wavefront sensor

Not Accessible

Your library or personal account may give you access

Abstract

In the paper, we propose a simple algorithm that improves the quality with which the displacements between images registered in the sub-apertures of a a Shack–Hartmann (SH) wavefront sensor can be determined. Instead of measuring shifts between a given sub-aperture and a reference image, the method transforms a matrix of all relative displacements between sub-apertures into a vector of final shifts estimated with significantly increased accuracy. The method can be applied to any observations employing an SH wavefront sensor, especially if a scene evolves rapidly and a reference, high-fidelity image cannot be obtained. The proposed technique allows for reducing nonlinearities and biasing of estimations present in current state of the art methods.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Accounting for focal shift in the Shack–Hartmann wavefront sensor

Vyas Akondi and Alfredo Dubra
Opt. Lett. 44(17) 4151-4154 (2019)

Shack–Hartmann versus reverse Hartmann wavefront sensors: experimental results

Cyril Pannetier and François Hénault
Opt. Lett. 45(7) 1746-1749 (2020)

Intensity-enhanced deep network wavefront reconstruction in Shack–Hartmann sensors

Theodore B. DuBose, Dennis F. Gardner, and Abbie T. Watnik
Opt. Lett. 45(7) 1699-1702 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved