All Figures

$\begin{figure} {\hbox{ \includegraphics[width=5cm]{3861_f1a.ps}\hspace{1cm} \inc... ...ted approach. & & (b) layer-oriented approach.\\ \end{tabular} } \end{figure}$ Figure 1: Schemes of star-oriented and layer oriented approaches. GS = guide star, WFS = wavefront sensor, WFC = wavefront controller and DM = deformable mirror.
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In the text

$\begin{figure} {\hbox{ \includegraphics[width=2cm]{3861_f2a.ps}\hspace{2cm} \inc... ...ed approach.& (b) The layer-oriented approach.\\ \end{tabular} } \end{figure}$ Figure 2: Wavefront sensor measurements in star-oriented and layer-oriented approaches when employing three guide stars and two wavefront sensor planes in the layer-oriented approach, conjugated to DM1 and DM2. For the sake of simplicity, DM1 is conjugated to the pupil plane, and thus in its associated wavefront sensor plane, the footprints of the three guide stars perfectly overlap. This is not the case with DM2, conjugated to a turbulent layer in altitude, where the star footprints are displaced by an amount depending on the star position in the field and on the altitude of the layer.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{3861fa1.ps} \end{figure}$ Figure A.1: Numerical and optical SNR when wavefront-sensing and imaging in the K band (case 1) as a function of the equivalent magnitude in the K band when employing 10 guide stars. Continuous lines correspond to numerical measurements and dashed lines correspond to optical measurements. Diamond symbols are used for $\gamma =10.$ , while no symbols are used for $\gamma =1.$ Parameters are given in Table A.1.

In the text

$\begin{figure} {\hbox{ \includegraphics[width=4.5cm]{3861Fa2a.ps}\hspace{0.5cm} ... ...\space band. & & ~~~correction $K$\space band.\\ \end{tabular} } \end{figure}$ Figure A.2: SNR versus equivalent magnitude at the wavefront-sensing wavelength. Continuous lines stand for numerical and dashed lines for optical. Curves corresponding to two values of $\gamma$ are shown: $\gamma =1.$ , without symbols; $\gamma =10.$ , diamond symbols. For the three cases we have assumed $N_{\rm gs}=10$ .

In the text

$\begin{figure} {\hbox{ \includegraphics[width=4.5cm]{3861fa3a.ps}\hspace{0.5cm} ... ...ction $R$ ~band.& & ~~~correction $K$\space band. \end{tabular} }\end{figure}$ Figure A.3: Gain in magnitude as a function of the number of guide stars, for $\gamma =1.$ and $\gamma =10.$ and several values of SNR. Dashed lines correspond to SNR=2.0, continuous lines to SNR=1.0and dashed-dotted lines to SNR=0.5.

In the text

$\begin{figure} {\hbox{ \includegraphics[width=6cm]{3861fa4a.ps}\hspace{1cm} \inc... ...ensing $R$\space band, imaging $K$\space band.\hspace*{3.5cm}}\\ \end{figure}$ Figure A.4: Limiting RON employing 10 guide stars, in order to have the same SNR with NUMLO and OPTLO measurements. RON above this value will give better SNR when using OPTLO measurements. Continuous lines correspond to RON while dashed lines correspond to SNR. No symbols are employed in the case of $\gamma =1.$ while diamonds symbols are used for $\gamma =10$ . Dotted lines have been drawn at 18 $\rm e^-$ /pixel in case 1, and 3 $\rm e^-$ /pixel in cases 2 and 3, corresponding to the state-of-art of infrared and visible detectors respectively.

In the text

$\begin{figure} {\hbox{ \includegraphics[width=7cm]{3861fa5a.ps}\hspace{1cm} \inc... ...ars.& & {\bf b)} Ten guide stars.\\ \end{tabular} \hspace*{4.5cm}} \end{figure}$ Figure A.5: Gain in magnitude as a function of SNR for several values of $\alpha$ and $\gamma$ when wavefront-sensing and imaging in the R band (case 2). Continuous lines are used for $\gamma =1$ and dashed lines for $\gamma =10$ . Symbols are also used for the different numbers of DMs (i.e. different values of $\alpha$ ): squares for 1 DM, asterisks for 2 DMs, diamonds for 3 DMs and triangles for 4 DMs.

In the text

$\begin{figure} {\hbox{ \includegraphics[width=5cm]{3861_f1a.ps}\hspace{1cm} \inc... ...ted approach. & & (b) layer-oriented approach.\\ \end{tabular} } \end{figure}$	Figure 1: Schemes of star-oriented and layer oriented approaches. GS = guide star, WFS = wavefront sensor, WFC = wavefront controller and DM = deformable mirror.
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