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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Speckle masking ： ウィキペディア英語版 Speckle masking Speckle masking (or bispectral analysis, as applied to speckle imaging), is a method which involves estimation of the bispectrum or closure phases from each of the short exposures. The "average bispectrum" can then be calculated and then inverted to obtain an image. With a normal telescope aperture, a large number of short exposures must be averaged to remove the effects of the atmosphere. If a non-redundant aperture mask is used the bispectrum can be calculated without any noise contribution from the atmosphere (but still with a photon-shot noise error contribution). In this arrangement a ground-based telescope aperture is blocked by astronomers apart from a few holes which allow light through, creating a small optical interferometer with the resolving power of a diffraction-limited telescope rather than being limited by the astronomical seeing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Speckle masking」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.