Baker D J
Appl Opt. 1974 Sep 1;13(9):2160-3. doi: 10.1364/AO.13.002160.
A 0.7% accurate formula is derived for the easy conversion of power spectral radiance L(lambda) in W cm(-2) sr(-1) microm(-1)to rayleigh spectral radiance R(lambda) in rayleigh/microm, R(lambda) = 2pilambdaL(lambda) x 10(13), where the wavelength lambda is in microm. The rationale for the rayleigh unit is discussed in terms of a photon rate factor and a solid angle factor. The latter is developed in terms of an equivalence theorem about optical receivers and extended sources, and the concept is extended to the computation of photon volume emission rates from altitude profiles of zenith radiance.
推导出一个精度为0.7%的公式，用于将功率谱辐射率L(λ)（单位为W cm⁻² sr⁻¹ μm⁻¹）轻松转换为瑞利谱辐射率R(λ)（单位为瑞利/μm），R(λ) = 2πλL(λ)×10¹³，其中波长λ的单位为μm。从光子速率因子和立体角因子的角度讨论了瑞利单位的基本原理。后者是根据关于光接收器和扩展源的等效定理推导出来的，并且该概念被扩展到从天顶辐射的高度剖面计算光子体发射率。
