翻訳と辞書 Words near each other ・ "O" Is for Outlaw ・ "O"-Jung.Ban.Hap. ・ "Ode-to-Napoleon" hexachord ・ "Oh Yeah!" Live ・ "Our Contemporary" regional art exhibition (Leningrad, 1975) ・ "P" Is for Peril ・ "Pimpernel" Smith ・ "Polish death camp" controversy ・ "Pro knigi" ("About books") ・ "Prosopa" Greek Television Awards ・ "Pussy Cats" Starring the Walkmen ・ "Q" Is for Quarry ・ "R" Is for Ricochet ・ "R" The King (2016 film) ・ "Rags" Ragland ・ ! (album) ・ ! (disambiguation) ・ !! ・ !!! ・ !!! (album) ・ !!Destroy-Oh-Boy!! ・ !Action Pact! ・ !Arriba! La Pachanga ・ !Hero ・ !Hero (album) ・ !Kung language ・ !Oka Tokat ・ !PAUS3 ・ !T.O.O.H.! ・ !Women Art Revolution Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク angular aperture ： ウィキペディア英語版 angular aperture The angular aperture of a lens is the apparent angle of the lens aperture as seen from the focal point: :$a\; =\; 2\; \backslash arctan\; \backslash left(\; \backslash frac\; \backslash right)\; =\; 2\; \backslash arctan\; \backslash left(\; \backslash frac\; \backslash right)$ where :$f$ is the focal length :$D$ is the diameter of the aperture. == Relation to numerical aperture == In a medium with an index of refraction close to 1, such as air, the angular aperture is approximately equal to twice the numerical aperture of the lens. Formally, the numerical aperture in air is: :$\backslash mathrm\; =\; \backslash sin\; a/2\; =\; \backslash sin\; \backslash arctan\; \backslash left(\; \backslash frac\; \backslash right)$ In the paraxial approximation, with a small aperture, :$\backslash mathrm\; \backslash approx\; a/2$ 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「angular aperture」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.