Abstract

The reconstruction of wavefront errors from measurements over subapertures can be made more accurate if a fully characterized quadratic surface can be fitted to the local wavefront surface. An astigmatic hybrid wavefront sensor with added neural network postprocessing is shown to have this capability, provided that the focal image of each subaperture is sufficiently sampled. Furthermore, complete local curvature information is obtained with a single image without splitting beam power.

© 2009 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. H. Campbell and A. Greenaway, in Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling, and Data Processing, M. Carbillet, A. Ferrari, and C. Aime, eds., EAS Publications Series (2006), Vol. 22, pp. 165-185.
  2. W. Zou, K. Thompson, and J. Rolland, J. Opt. Soc. Am. A 25, 2331 (2008).
    [CrossRef]
  3. H. Barrett, C. Dainty, and D. Lara, J. Opt. Soc. Am. A 24, 391 (2007).
    [CrossRef]
  4. F. Roddier, Appl. Opt. 27, 1223 (1988).
    [CrossRef] [PubMed]
  5. C. Paterson and J. Dainty, Opt. Lett. 25, 1687 (2000).
    [CrossRef]
  6. H. Guo, N. Korablinova, Q. Ren, and J. Bille, Opt. Express 14, 6456 (2006).
    [CrossRef] [PubMed]

2008 (1)

2007 (1)

2006 (1)

2000 (1)

1988 (1)

Barrett, H.

Bille, J.

Campbell, H.

H. Campbell and A. Greenaway, in Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling, and Data Processing, M. Carbillet, A. Ferrari, and C. Aime, eds., EAS Publications Series (2006), Vol. 22, pp. 165-185.

Dainty, C.

Dainty, J.

Greenaway, A.

H. Campbell and A. Greenaway, in Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling, and Data Processing, M. Carbillet, A. Ferrari, and C. Aime, eds., EAS Publications Series (2006), Vol. 22, pp. 165-185.

Guo, H.

Korablinova, N.

Lara, D.

Paterson, C.

Ren, Q.

Roddier, F.

Rolland, J.

Thompson, K.

Zou, W.

Appl. Opt. (1)

J. Opt. Soc. Am. A (2)

Opt. Express (1)

Opt. Lett. (1)

Other (1)

H. Campbell and A. Greenaway, in Astronomy with High Contrast Imaging III: Instrumental Techniques, Modeling, and Data Processing, M. Carbillet, A. Ferrari, and C. Aime, eds., EAS Publications Series (2006), Vol. 22, pp. 165-185.

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

FI of an astigmatic lenslet with q = 2.7 and θ o = π / 4 when it is aberrated by τ c equal to (a) (0,0,0), (b) (3,0,0), (c) (0,3,0), and (d) (3,3,3).

Fig. 2
Fig. 2

Logarithm of the ensemble MSE between the actual τ c and the ANN estimates is plotted versus the SNR normalized to constant beam intensity. The separate curves represent sampling of the FI by pixel grids of 4 × 4 , 6 × 6 , 8 × 8 , and 10 × 10 .

Fig. 3
Fig. 3

Same data as Fig. 2 are shown except that raw MSE is plotted versus the normalized SNR for only low SNR.

Fig. 4
Fig. 4

RMSE is plotted versus SNR for individual elements of τ c corresponding to the 8 × 8 curves in Figs. 2, 3.

Metrics