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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 5 — Mar. 1, 2014
  • pp: 1286–1289

Error analysis of moment-based modal wavefront sensing

Hanshin Lee  »View Author Affiliations


Optics Letters, Vol. 39, Issue 5, pp. 1286-1289 (2014)
http://dx.doi.org/10.1364/OL.39.001286


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Abstract

The shape of a focus-modulated point spread function (PSF) is used as a quick visual assessment tool of aberration modes in the PSF. Further analysis in terms of shape moments can permit quantifying the modal coefficients with an accuracy comparable to that of typical wavefront sensors. In this Letter, the error of the moment-based wavefront sensing is analytically described in terms of the pixelation and photon/readout noise. All components highly depend on the (unknown) PSF shape but can be estimated from the measured PSF sampled at a reasonable spatial resolution and photon count. Numerical simulations verified that the models consistently predicted the behavior of the modal estimation error of the moment-based wavefront sensing.

© 2014 Optical Society of America

OCIS Codes
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(080.1010) Geometric optics : Aberrations (global)
(110.2960) Imaging systems : Image analysis
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(220.4840) Optical design and fabrication : Testing

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: November 4, 2013
Revised Manuscript: January 14, 2014
Manuscript Accepted: January 17, 2014
Published: February 26, 2014

Citation
Hanshin Lee, "Error analysis of moment-based modal wavefront sensing," Opt. Lett. 39, 1286-1289 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-5-1286


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