翻訳と辞書 Words near each other ・ Spectral invariants ・ Spectral layout ・ Spectral leakage ・ Spectral line ・ Spectral line ratios ・ Spectral line shape ・ Spectral mask ・ Spectral method ・ Spectral modeling synthesis ・ Spectral Mornings ・ Spectral music ・ Spectral mutability ・ Spectral network ・ Spectral noise logging ・ Spectral phase interferometry for direct electric-field reconstruction ・ Spectral power distribution ・ Spectral printing ・ Spectral purity ・ Spectral pygmy chameleon ・ Spectral radius ・ Spectral regrowth ・ Spectral rendering ・ Spectral resolution ・ Spectral risk measure ・ Spectral Sciences Incorporated ・ Spectral sensitivity ・ Spectral sequence ・ Spectral set ・ Spectral shape analysis ・ Spectral signal-to-noise ratio 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 Spectral power distribution ： ウィキペディア英語版 Spectral power distribution In radiometry, photometry and color science, a spectral power distribution (SPD) measurement describes the power per unit area per unit wavelength of an illumination (radiant exitance). More generally, the term ''spectral power distribution'' can refer to the concentration, as a function of wavelength, of any radiometric or photometric quantity (e.g. radiant energy, radiant flux, radiant intensity, radiance, irradiance, radiant exitance, radiosity, luminance, luminous flux, luminous intensity, illuminance, luminous emittance). Knowledge of the SPD is crucial for optical-sensor system applications. Optical properties such as transmittance, reflectivity, and absorbance as well as the sensor response are typically dependent on the incident wavelength.〔 == Physics of SPD== Mathematically, for the spectral power distribution of a radiant exitance or irradiance one may write: : $M(\backslash lambda)=\backslash frac\backslash approx\backslash frac$ where $M(\backslash lambda)$ is the spectral irradiance (or exitance) of the light (SI units: W/m3 = kg/(m·s3)); $\backslash Phi$ is the radiant flux of the source (SI unit: watt, W); $A$ is the area over which the radiant flux is integrated (SI unit: square meter, m2); and $\backslash lambda$ is the wavelength (SI unit: meter, m). (Note that it is more convenient to express the wavelength of light in terms of nanometers; spectral exitance would then be expressed in units of W·m−2·nm−1.) The approximation is valid when the area and wavelength interval are small. 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「Spectral power distribution」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.