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Area Lighting / Emission, optical properties of materials

IEV ref 845-24-092

Symbol
an(λ)

en
Napierian spectral absorption coefficient, <of a homogeneous non-diffusing layer>
quotient of the natural (Napierian) logarithm of the reciprocal of the spectral internal transmittance, τi(λ), of a layer of the medium and the length, l, of the path of a beam of radiation traversing that layer

a n (λ)= ln τ i (λ) l = log τ i (λ) l ln(10)= A n (λ) l MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadggadaWgaaWcbaGaaeOBaaqabaGccaGGOaGaeq4UdWMaaiykaiab g2da9iabgkHiTmaalaaabaqcaaKaciiBaiaac6gakiabes8a0naaBa aaleaacaqGPbaabeaakiaacIcacqaH7oaBcaGGPaaabaGaamiBaaaa cqGH9aqpdaWcaaqaaKaaajGacYgacaGGVbGaai4zaOGaeqiXdq3aaS baaSqaaiaabMgaaeqaaOGaaiikaiabeU7aSjaacMcaaeaacaWGSbaa aKaaajaabYgacaqGUbGaaeikaiaabgdacaqGWaGaaeykaOGaeyypa0 ZaaSaaaeaacaWGbbWaaSbaaSqaaiaab6gaaeqaaOGaaiikaiabeU7a SjaacMcaaeaacaWGSbaaaaaa@5E62@

where An(λ) is Napierian spectral absorbance.

Note 1 to entry: The Napierian spectral absorption coefficient is expressed in metre to the power minus one (m−1).

Note 2 to entry: This entry was numbered 845-04-85 in IEC 60050-845:1987.


fr
coefficient d'absorption spectral népérien, <d'une couche homogène non diffusante> m
quotient du logarithme naturel (népérien) de l'inverse du facteur de transmission interne spectral τi(λ), d'une couche du milieu par la longueur, l, du trajet d'un faisceau de rayonnement traversant cette couche

a n (λ)= ln τ i (λ) l = log τ i (λ) l ln(10)= A n (λ) l MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadggadaWgaaWcbaGaaeOBaaqabaGccaGGOaGaeq4UdWMaaiykaiab g2da9iabgkHiTmaalaaabaqcaaKaciiBaiaac6gakiabes8a0naaBa aaleaacaqGPbaabeaakiaacIcacqaH7oaBcaGGPaaabaGaamiBaaaa cqGH9aqpdaWcaaqaaKaaajGacYgacaGGVbGaai4zaOGaeqiXdq3aaS baaSqaaiaabMgaaeqaaOGaaiikaiabeU7aSjaacMcaaeaacaWGSbaa aKaaajaabYgacaqGUbGaaeikaiaabgdacaqGWaGaaeykaOGaeyypa0 ZaaSaaaeaacaWGbbWaaSbaaSqaaiaab6gaaeqaaOGaaiikaiabeU7a SjaacMcaaeaacaWGSbaaaaaa@5E62@

An(λ) est l'absorbance spectrale népérienne.

Note 1 à l'article: Le coefficient d'absorption spectral népérien est exprimé en mètre à la puissance moins un (m−1).

Note 2 à l'article: Cet article était numéroté 845-04-85 dans l'IEC 60050-845:1987.


ar
معامل إمتصاص طيفى نابيرنانى, < لطبقة متجانسة غير منتشرة >

de
spektraler natürlicher Absorptionskoeffizient, <einer homogenen, nicht streuenden Schicht> m

it
coefficiente di assorbimento spettrale neperiano, <di uno strato omogeneo non diffondente>

ko
네피어 분광 흡수 계수, <동질 비확산>

ja
自然対数分光吸収係数, <均質な非拡散層の>

pl
wskaźnik pochłaniania widmowy naturalny, <nierozpraszającej warstwy jednorodnej> m

pt
coeficiente de absorção espectral neperiano, <de uma camada não difusora homogénea>

zh
奈培光谱吸收系数, <均匀非漫射层的>

Publication date: 2020-12
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