Abstract

An experimental validation of the spatially filtered Shack–Hartmann concept (F-SH) is presented that allows aliasing effects to be decreased. This effect is studied by use of an adaptive optical testbed with a focal plane pinhole in front of the wave-front sensor. First, the ability to close the loop on turbulence is demonstrated. Then the performance gain conferred by the device is quantified and compared with end-to-end simulation results. Another property of the F-SH concept, i.e., the reduction of the waffle modes, is highlighted.

© 2005 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. D. Mouillet, T. Fusco, A.-M. Lagrange, and J.-L. Beuzit, in Astronomy with High Contrast Imaging: From Planetary Systems to Active Galactic Nuclei, C. Aime and R. Soummer, eds., Vol. 8 of EAS Publications Series (European Astronomical Society, Geneva, 2002), pp. 193–200.
  2. F. Rigaut, J.-P. Véran, and O. Lai, Proc. SPIE 3353, 38 (1998).
  3. L. A. Poyneer and B. Macintosh, J. Opt. Soc. Am. A 21, 810 (2004).
    [CrossRef]
  4. R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
    [CrossRef]
  5. A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
    [CrossRef]

2004 (2)

L. A. Poyneer and B. Macintosh, J. Opt. Soc. Am. A 21, 810 (2004).
[CrossRef]

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

2003 (1)

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

1998 (1)

F. Rigaut, J.-P. Véran, and O. Lai, Proc. SPIE 3353, 38 (1998).

Beuzit, J.-L.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

D. Mouillet, T. Fusco, A.-M. Lagrange, and J.-L. Beuzit, in Astronomy with High Contrast Imaging: From Planetary Systems to Active Galactic Nuclei, C. Aime and R. Soummer, eds., Vol. 8 of EAS Publications Series (European Astronomical Society, Geneva, 2002), pp. 193–200.

Blanc, A.

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

Conan, R.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

Fusco, T.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

D. Mouillet, T. Fusco, A.-M. Lagrange, and J.-L. Beuzit, in Astronomy with High Contrast Imaging: From Planetary Systems to Active Galactic Nuclei, C. Aime and R. Soummer, eds., Vol. 8 of EAS Publications Series (European Astronomical Society, Geneva, 2002), pp. 193–200.

Hartung, M.

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

Lagrange, A.-M.

D. Mouillet, T. Fusco, A.-M. Lagrange, and J.-L. Beuzit, in Astronomy with High Contrast Imaging: From Planetary Systems to Active Galactic Nuclei, C. Aime and R. Soummer, eds., Vol. 8 of EAS Publications Series (European Astronomical Society, Geneva, 2002), pp. 193–200.

Lai, O.

F. Rigaut, J.-P. Véran, and O. Lai, Proc. SPIE 3353, 38 (1998).

Macintosh, B.

Mouillet, D.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

D. Mouillet, T. Fusco, A.-M. Lagrange, and J.-L. Beuzit, in Astronomy with High Contrast Imaging: From Planetary Systems to Active Galactic Nuclei, C. Aime and R. Soummer, eds., Vol. 8 of EAS Publications Series (European Astronomical Society, Geneva, 2002), pp. 193–200.

Mugnier, L. M.

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

Nicolle, M.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

Petit, C.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

Poyneer, L. A.

Rigaut, F.

F. Rigaut, J.-P. Véran, and O. Lai, Proc. SPIE 3353, 38 (1998).

Rousset, G.

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

Véran, J.-P.

F. Rigaut, J.-P. Véran, and O. Lai, Proc. SPIE 3353, 38 (1998).

Astron. Astrophys. (1)

A. Blanc, T. Fusco, M. Hartung, L. M. Mugnier, and G. Rousset, Astron. Astrophys. 399, 373 (2003).
[CrossRef]

J. Opt. Soc. Am. A (1)

Proc. SPIE (2)

R. Conan, T. Fusco, G. Rousset, D. Mouillet, J.-L. Beuzit, M. Nicolle, and C. Petit, Proc. SPIE 5490, 602 (2004).
[CrossRef]

F. Rigaut, J.-P. Véran, and O. Lai, Proc. SPIE 3353, 38 (1998).

Other (1)

D. Mouillet, T. Fusco, A.-M. Lagrange, and J.-L. Beuzit, in Astronomy with High Contrast Imaging: From Planetary Systems to Active Galactic Nuclei, C. Aime and R. Soummer, eds., Vol. 8 of EAS Publications Series (European Astronomical Society, Geneva, 2002), pp. 193–200.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (4)

Fig. 1
Fig. 1

Closed-loop images of a SH subaperture (left) without filtering (before thresholding) and (right) with filtering.

Fig. 2
Fig. 2

Top, log–log representation of the average PSF profiles for classic and 1.5 λ d filtered SH WFSs. Bottom, zoom of the top figure when 2 λ d filtering is added.

Fig. 3
Fig. 3

Comparison of PSF profiles with classic SH and 2 λ d and 1.5 λ d filtered SH sensors obtained by end-to-end simulations with all parameters of the AO bench (in particular, D r 0 = 6 and imaging-path low-order aberrations) taken into account.

Fig. 4
Fig. 4

Closed-loop PSFs obtained without turbulence with (left) a classic and (right) a filtered ( 1.5 λ d ) SH sensor. PSF peaks have been saturated to focus on waffle-mode features (four secondary peaks are located at the corners of a 2 λ d size square). The SRs are, respectively, 76.5% and 79%.

Tables (1)

Tables Icon

Table 1 Strehl Ratios Obtained with and without a Filtering Device for Two Runs a

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

SR gain = SR filterd SH SR classic SH 1 ,

Metrics