Random Wave-Front Perturbations and Telescopic Star Images
نویسندگان
چکیده
منابع مشابه
Detection of wave front set perturbations via correlation: Foundation for wave-equation tomography
We discuss the mathematical aspects of wave field measurements used in traveltime inversion from seismograms. The primary information about the medium is assumed to be carried by the wave front set and its perturbation with repsect to a hypothetical background medium is to be estimated. By a convincing heuristics a detection procedure for this perturbation was proposed based on optimization of ...
متن کاملEntropy via Random Perturbations
The entropy of a dynamical system S' on a hyperbolic attractor with respect to the Bowen-Ruelle-Sina) measure is obtained as a limit of entropy characteristics of small random perturbations x' of S'. Both the case of perturbations only in some neighborhood of an attractor and global perturbations of a flow with hyperbolic attracting sets are considered.
متن کاملde-Broglie Wave-Front Engineering
We propose a simple method for the deterministic generation of an arbitrary continuous quantum state of the center-ofmass of an atom. The method’s spatial resolution gradually increases with the interaction time with no apparent fundamental limitations. Such de-Broglie Wave-Front Engineering of the atomic density can find applications in Atom Lithography, and we discuss possible implementations...
متن کاملFlows, Random Perturbations and Rate of Mixing
A new approach to the study of the rate of mixing in Anosov flows, recently proposed by N. Chernov, is simplified and generalized to the higher dimensional case. CONTENT 0. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .p. 2 1. Preliminaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
متن کاملHybrid curvature and gradient wave-front sensor.
A new wave-front sensor for adaptive optics that gives signals for the curvature and the two gradient components of the wave front simultaneously is proposed. The sensor uses quad cells placed at the foci of an array of astigmatic lenslets, giving three intensity-normalized differential signals. The parameters of a single subdetector are optimized to maximize the curvature signal. The performan...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1972
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/158.2.199