Abstract

A study has been made of a Gram–Charlier matched filter for Shack–Hartmann sensing of wavefront slopes. The method is based on modeling the point-spread function by an expansion in terms of Gauss–Hermite polynomials. We present results for several subaperture/coherence area sizes both with and without CCD read noise. A more accurate estimation of the local slopes can be achieved at low light levels in this way than with the standard first-moment estimator.

© 1998 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Ultra-sensitive wavefront measurement using a Hartmann sensor

Aidan F. Brooks, Thu-Lan Kelly, Peter J. Veitch, and Jesper Munch
Opt. Express 15(16) 10370-10375 (2007)

Shack-Hartmann spot dislocation map determination using an optical flow method

J. Vargas, R. Restrepo, and T. Belenguer
Opt. Express 22(2) 1319-1329 (2014)

Liquid-crystal Hartmann wave-front scanner

Ségolène Olivier, Vincent Laude, and Jean-Pierre Huignard
Appl. Opt. 39(22) 3838-3846 (2000)

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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

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

Figures (2)

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

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

Tables (1)

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

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

Equations (11)

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

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

Metrics

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

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