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物体颜色测量的方法是基于材料的电磁光谱测试,从而计算出颜色的三刺激值和其它颜色坐标。荧光材料的特性也是用三刺激值和色品坐标表示的。因此它的色测量可以用分光光度计和色度计进行。荧光材料和非荧光材料的区别在于它不仅能反射一部分照明光的光谱成分,而且在照明光的激发下它能发射一定波长的光谱,而这些光谱成分在照明光束中是不存在的,所以荧光材料的色测量取决于它反射和发射光谱的总和:B_T(μ,λ)=β_S(λ)+β_U(μ,λ)。因此对荧光材料进行准确的测量和分类是很复杂和耗时的工作。进行荧光颜色测量的主要问题有:确定一个荧光样品的发射和反射的光谱反射辐亮度因数;用足够能量的光源激发样品以使样品反射并发射一定强度的光进行光谱分析;考虑对样品照明和观察的角度不同会对结果产生的影响;选择合适的照明光源等。因此适合于颜色测量的荧光光谱仪必须能够测量反射光谱和荧光光谱,并且必须使用标准几何条件,即 CIE 推荐的四种测量反射色的标准照明和观测条件。色度应用的荧光数据必须用反射标准来表示,而反射标准是建立在假设的完全漫反射体的基础上的。实际上的反射标准是通过压制硫酸钡板、乳白玻璃片、陶瓷板或其它高反射、无光谱选择性的漫反射材料实现的。从运转的差别看,尽管测量原理是相似的,但是荧光测量在化学和色度学领域已经沿着不同的路线在发展。
The method for measuring the color of an object is based on the electromagnetic spectrum of the material and the color tristimulus values and other color coordinates are calculated. Fluorescent materials are also characterized by tristimulus values and chromaticity coordinates. So its color measurement can be done with a spectrophotometer and a colorimeter. The difference between a fluorescent material and a non-fluorescent material is that it not only reflects a part of the spectral components of the illumination light but also emits a certain wavelength of spectrum under the excitation of the illumination light, and these spectral components are not present in the illumination beam, so the fluorescence The color measurement of a material depends on the sum of its reflection and emission spectra: B_T (μ, λ) = β_S (λ) + β_U (μ, λ). Therefore, accurate measurement and classification of fluorescent materials is a complicated and time-consuming task. The main problems with performing fluorescence color measurements include: determining the spectral reflection radiance factor of emission and reflection of a fluorescent sample; exciting the sample with a source of sufficient energy to reflect the sample and emit a light of a certain intensity for spectral analysis; Different perspectives will affect the results; choose the right lighting and so on. Fluorescence spectrometers suitable for color measurement must therefore be capable of measuring both reflection and fluorescence spectra and must use standard geometry, the four standard illumination and observation conditions recommended by CIE for measuring reflected colors. Fluorescence data for chroma applications must be expressed in terms of the reflection standard, which is based on a hypothetical fully diffuse reflector. The actual reflection standard is achieved by pressing barium sulphate plates, opal glass plates, ceramic plates or other highly reflective, spectrally selective, diffusely reflective materials. From the difference in operation, although the measurement principle is similar, the fluorescence measurement has been developed along different routes in the fields of chemistry and colorimetry.