The Spectral Distribution of Energy Required to Evoke the Gray Sensation
The Spectral Distribution of Energy Required to Evoke the Gray Sensation
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引起灰色感觉所需能量的光谱分布
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通讯作者：
I. G. Priest
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作者：
I. G. Priest
从已知光谱分布的灯发出的光通过石英板和尼科尔棱镜系统的旋转色散进行修改，通过旋转其中一个尼科尔，可以使从它发出的光在4000至7000°k之间的任何所需温度下假定普朗克辐射体的光谱分布。这样的系统实际上是一个可调光谱的选择性滤光器
this: Light from a lamp of known spectral distribution is modified by rotatory dispersion in a system of quartz plates and nicol prisms in such a way that by rotating one of the nicols the light emerging from it can be made to assume the spectral distribution of a Planckian radiator at any desired temperatrue between 4000 and 7000° K. Such a system is, in effect, a selective light filter of adjustable spectral