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Polychromatic AO: Wavefront sensing and observing at different wavelengths

Owner-Petersen, Mette LU (2008) Retirement Symposium for Arne Ardeberg on Extremely Large Telescopes - Which Wavelengths In Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg 6986. p.9860-9860
Abstract
When performing adaptive optics (AO) correction for the effect of atmospheric fluctuations, different effects, related to measuring the wavefront at one wavelength and observing at another one, may show up. Some of these effects are related to the dispersive properties of the atmosphere. Others are related to diffraction, both regarding light propagation through the turbulent atmosphere to the entrance pupil of the telescope and regarding the inevitable Fraunhofer diffraction taking place for light propagating from the exit pupil to the image plane of the telescope. In this paper some of these effects are revised and discussed, in particular the way in which uncorrected wavefront errors in the point spread function (PSF) will scale with... (More)
When performing adaptive optics (AO) correction for the effect of atmospheric fluctuations, different effects, related to measuring the wavefront at one wavelength and observing at another one, may show up. Some of these effects are related to the dispersive properties of the atmosphere. Others are related to diffraction, both regarding light propagation through the turbulent atmosphere to the entrance pupil of the telescope and regarding the inevitable Fraunhofer diffraction taking place for light propagating from the exit pupil to the image plane of the telescope. In this paper some of these effects are revised and discussed, in particular the way in which uncorrected wavefront errors in the point spread function (PSF) will scale with color, and the way in which dispersion affects the Strehl ratio and the background level of the AO corrected PSF. Also discussed is the trade-off between AO spectral bandwidth and Poisson noise. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg
editor
Andersen, Torben and
volume
6986
pages
9860 - 9860
publisher
SPIE
conference name
Retirement Symposium for Arne Ardeberg on Extremely Large Telescopes - Which Wavelengths
external identifiers
  • wos:000258065600017
  • scopus:43549086870
ISSN
0277-786X
1996-756X
DOI
10.1117/12.801276
language
English
LU publication?
yes
id
90c86963-b7af-430f-a7d2-b3b56e294050 (old id 1278631)
date added to LUP
2009-01-19 16:00:04
date last changed
2017-11-20 15:06:05
@inproceedings{90c86963-b7af-430f-a7d2-b3b56e294050,
  abstract     = {When performing adaptive optics (AO) correction for the effect of atmospheric fluctuations, different effects, related to measuring the wavefront at one wavelength and observing at another one, may show up. Some of these effects are related to the dispersive properties of the atmosphere. Others are related to diffraction, both regarding light propagation through the turbulent atmosphere to the entrance pupil of the telescope and regarding the inevitable Fraunhofer diffraction taking place for light propagating from the exit pupil to the image plane of the telescope. In this paper some of these effects are revised and discussed, in particular the way in which uncorrected wavefront errors in the point spread function (PSF) will scale with color, and the way in which dispersion affects the Strehl ratio and the background level of the AO corrected PSF. Also discussed is the trade-off between AO spectral bandwidth and Poisson noise.},
  author       = {Owner-Petersen, Mette},
  booktitle    = {Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg},
  editor       = {Andersen, Torben},
  issn         = {0277-786X},
  language     = {eng},
  pages        = {9860--9860},
  publisher    = {SPIE},
  title        = {Polychromatic AO: Wavefront sensing and observing at different wavelengths},
  url          = {http://dx.doi.org/10.1117/12.801276},
  volume       = {6986},
  year         = {2008},
}