Development of portable microfading spectrometers for measurement of light sensitivity of materials
Development of portable microfading spectrometers for measurement of light sensitivity of materials
复制标题
开发用于测量材料光敏感性的便携式微衰落光谱仪
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Hackney
中科院分区：
文献类型：
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作者：
Haida Liang;Rebecca Lange;Andrei Lucian;Paul Hyndes;Joyce H.TOWNSEND;S. Hackney
Microfading最初设计用于有效地检测物体上的极端光敏材料，以确定适当的展览照明条件。通过将强烈的光束聚焦到一个微小的亚毫米大小的斑点上，同时监测颜色随时间的变化，可以测量材料的褪色率，而不会产生明显的损坏。本文研究了一种改进的微褪色光谱仪的设计，该光谱仪易于组装，结构紧凑，坚固耐用，能够全自动采集数据，精确控制褪色时间，以产生更高精度的测量，并允许同时监测颜色，光谱反射率和其他变化在真实的时间。各种参数，如厚度和浓度的油漆层，结合介质和基板上的褪色速率的影响进行检查选定的颜料，并发现在某些情况下，基板，结合介质和厚度可以影响褪色速率。互惠的背景下，微褪色与现实的展览条件相比，检查，发现它打破了一些颜料。
Microfading was originally designed for efficiently detecting extremely light-sensitive materials on objects in situ to determine the appropriate exhibition lighting conditions. By focusing an intense beam of light to a tiny submillimetre sized spot and simultaneously monitoring the colour change over time, the fading rate of the material can be measured without producing noticeable damage. The increased intensity of light allows rapid determination of light-fastness of materials.This paper examines an improved design of microfading spectrometer that is easy to assemble, compact, robust, capable of fully automatic acquisition of data with precision control of the fading time to produce higher precision measurements and to allow simultaneous monitoring of colour, spectral reflectance and other changes in real time. The effects of various parameters such as thickness and concentration of paint layer, the binding medium and substrate on the fading rates are examined for selected pigments and found that in certain cases substrates, binding media and thickness can affect the fading rate. Reciprocity in the context of microfading compared with realistic exhibition conditions is examined and found that it breaks down for some pigments.