Effect of anisoplanatism on the measurement accuracy of an extended-source Hartmann-Shack wavefront sensor.
- 31 October 2008
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 48 (1), A35-A46
- https://doi.org/10.1364/ao.48.000a35
Abstract
We analyze the effect of anisoplanatic atmospheric turbulence on the measurement accuracy of an extended-source Hartmann-Shack wavefront sensor (HSWFS). We have numerically simulated an extended-source HSWFS, using a scenery of the solar surface that is imaged through anisoplanatic atmospheric turbulence and imaging optics. Solar extended-source HSWFSs often use cross-correlation algorithms in combination with subpixel shift finding algorithms to estimate the wavefront gradient, two of which were tested for their effect on the measurement accuracy. We find that the measurement error of an extended-source HSWFS is governed mainly by the optical geometry of the HSWFS, employed subpixel finding algorithm, and phase anisoplanatism. Our results show that effects of scintillation anisoplanatism are negligible when cross-correlation algorithms are used.Keywords
This publication has 19 references indexed in Scilit:
- Adaptive Optics at the Big Bear Solar Observatory: Instrument Description and First ObservationsPublications of the Astronomical Society of the Pacific, 2007
- Shack-Hartmann wavefront estimation with extended sources: anisoplanatism influence.Journal of the Optical Society of America A, 2007
- Shack-Hartmann wavefront sensing with extended sourcesPublished by SPIE-Intl Soc Optical Eng ,2006
- Scintillation and phase anisoplanatism in Shack-Hartmann wavefront sensingJournal of the Optical Society of America A, 2006
- Recent advances in solar adaptive opticsPublished by SPIE-Intl Soc Optical Eng ,2004
- KAOS: Adaptive optics system for the Vacuum Tower Telescope at Teide ObservatoryPublished by SPIE-Intl Soc Optical Eng ,2003
- Adaptive optics system for the new Swedish solar telescopePublished by SPIE-Intl Soc Optical Eng ,2003
- Optical design of high-order adaptive optics for the NSO Dunn Solar Telescope and the Big Bear Solar ObservatoryPublished by SPIE-Intl Soc Optical Eng ,2003
- MWIR adaptive optics system for imaging missile defense tests using the 3.7-m AEOS telescopePublished by SPIE-Intl Soc Optical Eng ,2000
- Solar adaptive optics at the National Solar ObservatoryPublished by SPIE-Intl Soc Optical Eng ,1998