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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 Optical cross section ： ウィキペディア英語版 Optical cross section Optical Cross Section or OCS is a value which describes the maximum amount of optical flux reflected back to the source. The standard unit of measurement is $\backslash frac$. It is dependent on the geometry and the reflectivity at a particular wavelength of an object. Optical cross section is useful in fields such as LIDAR. In the field of Radar this is referred to Radar Cross Section. Objects such as license plates on automobiles have a high optical cross section to maximize the laser return to the speed detector gun. ==Flat mirror== Optical cross section of a flat mirror with a given reflectivity at a particular wavelength $r(\backslash lambda)$ can be express by this formula. $$ \mbox=r(\lambda) \frac Where $D$ is the cross sectional diameter of the beam. Note that the direction of the light has to be perpendicular to the mirror surface for this formula to be valid, else the return from the mirror would no longer go back to it source. In order to maximize the return a corner reflector is used. The alignment of a corner reflector with respect to the source is not as critical as the alignment of a flat mirror. 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「Optical cross section」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.