Lastly, we evaluate COFFEE's performance in a compensation ..... memory variable metric (BFGS) method ( [16, 17]), which is a fast quasi-Newton type mini-.
Translation from the French language edition of L'observation en astrophysique. c 2008 EDP ... astronomy â the search for life in the Universe â in which physics, chemistry, and biology each play their role. There are ... teacher have been organi
Oct 12, 2004 - e Department of Physics, GA Southern University, Landrum Box 8031, Statesboro, GA 30460, USA. Received 5 ..... (2002b). Thanks to J. Berthier for adding this pole solution to the pro- gram. .... The Tiny Tim User's Manual.
the coherent energy referring to the wavefront variance Ï2 in radian. ... where OTF is the optical transfer function. ... tector modulation transfer function (MTF).
Jan 1, 1993 - point-spread function (PSF), R', which is a bias plus ... (1) where x and y are the coordinates in the recording plane and fr is a scale factor that we call .... N pixels, takes the simple form .... L. M. Mugnier and G. Y. Sirat, Opt. L
systems. This allowed documenting the loss of photoreceptors in diseases such as retinitis pigmentosa. A precise counting of residual photoreceptors may be an.
This direction of optimum ..... where Mjkmn is the weight of the nth slope measurement from the mth guide .... ters, we can now calculate numerical computations to evaluate .... ciated with an efficient charge-coupled-device array pre- ceded by ...
stellar fields. Using the available prior information about .... where T0(f) is the telescope transfer function without at- mospheric .... This error gives the fundamental limitation ..... from Service Technique des Technologies Communes, Minist`ere.
possible for in-vivo samples, and in particular for retinal images, due to the uncontrolled eye movements. The aim of .... to estimate the shifts sl(x, y) between them, in order to sub- ... focused PSF that was Nyquist sampled, while the out-of-focus
H H OoLS D H i, where H is the adjoint of H (normal equation). 3. H OoLS D Pi .... In the least-squares method, the choice of a quadratic measure of the deviation.
Feb 14, 2013 - (18). The correction and stabilization of the NCPA variance can be seen in .... tively, and applying the chain rule, as already done in a non- .... Mugnier, L. M., Blanc, A., & Idier, J. 2006, in Advances in Imaging and Electron.
Feb 6, 2012 - This paper describes an original method to measure the modulation transfer function (MTF) of an infrared focal-plane array (IRFPA), based on a ...
of SR by the coherent energy in SRZern, which is valid only for small phase ..... whereiËab andiËAiry are the optical transfer function (OTF) of the aberrant system ...
DARWIN Infrared Space Interferometer (IRSI). The background of this mission and the outcome of the concept and feasibility study is given in [1]. The DWARF ...
the Cn. 2 profile is a continuous function of the altitude h. Links between this optimal approach and a .... noise ni(r) with, in the Fourier domain, a power spectral.
imaged to date that have masses less than 13 times that of Jupiter. ... Keywords: Exoplanets, coronagraphs, adaptive optics, instrumentation, theory ..... caused by random phase aberrations and log-amplitude perturbations in various optical ..... per
COFFEE has the advantage, with respect to approaches such as speckle nulling4 or the Electric Field Con- jugation .... reduce the noise sensitivity. We chose a ...
Jun 16, 2017 - Keywords: phase diversity; image sharpening; wavefront sensing; adaptive optics. Paper 16056P ... Piston discontinuities in segmented pupils are difficult to quan- .... subsequently median-filtered with a 2*FWHM kernel (i.e.,.
in Eq. (2), we obtain a new criterion Lâ²({xj,yj}) that only de- pends on the .... [4] Lisa Gottesfeld Brown, âA survey of image registration ... New York, NY, 1983.
images must be deconvolved to restore the fine details of the object. ... restoration with a good photometric precision because of the inevitable noise in the im-.
