分光光度计颜色测量的稳定性比较.docxVIP

摘要 随着科技水平的逐渐提高，人们对与颜色的准确复制与精确再现的要求的逐渐提高。特别是在印刷行业中，目前在印刷生产中仍然使用目视法测量颜色的企业已是少而又少，取而代之的是各种颜色测量仪器，使用它们通过测量得出数据做到了颜色的精确控制和准确传递，颜色测量仪器已成为印刷过程中不可或缺的组成部分，这也就要求颜色测量仪器有更高的性能尤其是准确性和稳定性。 本文总结了分光光度仪性能的发展趋势，国内外对分光光度仪性能的研究以及在稳定性、测量精度和功能上所做的技术突破；探究了分光光度仪的工作原理，从光源、分光元件两个方面介绍了它们如何对分光光度仪的性能产生影响；介绍了分光光度仪的技术参数和使用这些参数来评价分光光度仪性能的方式；使用实验室的四种分光测色仪器测量不同阶调层次上色块的色差，对比多次测量结果差异对仪器的短期稳定性、长期稳定性作出评价，综合分析得出SpectroEye的性能最好而EyeOne最差。 关键词：分光光度仪；稳定性；测量精度 ABSTRACT With the continuous development of the technology, people’s demand for color’s reproduction accurately is improving. Especially in the field of printing, there are less and less companies that make the judgment on color control by people’s eyes directly. Instead of that, the usage of all kinds of equipment for color measurement has become an important and significant part of printing process. This has raised the bar for color measurement equipment’s performance evaluation, especially for accuracy and stability. This paper has summarized the development of reflection densitometer, research on densitometer’s performance at home and abroad and the technology breakthroughs on accuracy, stability and functioning. It has also analyzed the principle of operation of densitometer and how light source, spectral element, energy detection system and data processing and display system have an effect on densitometer’s performance. It has introducedsome technical parameters to evaluate the performance of the equipment, and finally usedSpectroEye, SpectroScan, EyeOne and eXact to do experiments to evaluate short-term stability and long-term stability. The result shows that SpectroEye performed the best of them and EyeOne performed the worst. Key words: spectrodensitometer；stability；accuracy  目 录 TOC \o 1-3 \h \z \u 1绪论 1 1.1 研究背景和意义 1 1.2 国内外研究现状 1 1.3 本课题的研究内容 2 2 颜色测量的理论基础 4 2.1 颜色视觉 4 2.1.1 光和视觉 4 2.1.2 色彩的形成 4 2.2 CIE 标准色度学系统 5 2.2.1 CIE1931 标准色度学系统 5 2.2.2 CIELab空间和色差公式 7 2.3 标准照明体和视场 8 2.4 标准照明和观察条件 9