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

Algorithm to increase the largest aberration that can be reconstructed from Hartmann sensor measurements

Not Accessible

Your library or personal account may give you access

Abstract

Conventional Hartmann sensor processing relies on locating the centroid of the image that is formed behind each element of a lenslet array. These centroid locations are used for computing the local gradient of the incident aberration, from which the phase of the incident wave front is calculated. The largest aberration that can reliably be sensed in a conventional Hartmann sensor must have a local gradient small enough that the spot formed by each lenslet is confined to the area behind the lenslet: If the local gradient is larger, spots form under nearby lenslets, causing a form of cross talk between the wave-front sensor channels. We describe a wave-front reconstruction algorithm that processes the whole image measured by a Hartmann sensor and a conventional image that is formed by use of the incident aberration. We show that this algorithm can accurately estimate aberrations for cases in which the aberration is strong enough to cause many of the images formed by individual lenslets to fall outside the local region of the Hartmann sensor detector plane defined by the edges of a lenslet.

© 1998 Optical Society of America

Full Article  |  PDF Article
More Like This
Joint processing of Hartmann sensor and conventional image measurements to estimate large aberrations: theory and experimental results

Michael C. Roggemann, Timothy J. Schulz, Chee W. Ngai, and Jason T. Kraft
Appl. Opt. 38(11) 2249-2255 (1999)

Sorting method to extend the dynamic range of the Shack–Hartmann wave-front sensor

Junwon Lee, Roland V. Shack, and Michael R. Descour
Appl. Opt. 44(23) 4838-4845 (2005)

Use of artificial neural networks for Hartmann-sensor lenslet centroid estimation

Dennis A. Montera, Byron M. Welsh, Michael C. Roggemann, and Dennis W. Ruck
Appl. Opt. 35(29) 5747-5757 (1996)

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

Tables (3)

You do not have subscription access to this journal. Article tables 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 (37)

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved