A new colorimetric method for determining the color of a printed sample using electrophotography is presented. As a trade-off solution between colorimeter and spectrophotometer, this method aims to increase accuracy with respect to the colorimeter and simplify the system with respect to the spectrophotometer. The method is based on estimation of the spectrum of electromagnetic radiation in the visible range. This was performed by interpolating over the measured values of the spectral power radiation of proposed LED sources. Six LED sources were used, with dominant wavelengths at 400 nm, 457 nm, 517 nm, 572 nm, 632 nm and 700 nm at the transmitting side. On the receiving side there is a wideband detector in charge of recording the optical power at the above-mentioned wavelengths. Colorimetric capabilities of the proposed method were compared with spectrophotometric results, and good match was achieved. Reflectance spectrums obtained by the proposed method for printed samples doesn’t deviate significantly from those recorded by a commercial spectrophotometer. Also, the calculations of color differences don’t deviate from the tolerance threshold.

中文翻译：

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基于反射光谱估计的比色光纤传感器用于确定印刷样品的颜色

提出了一种使用电子照相术确定印刷样品颜色的新比色方法。作为色度计和分光光度计之间的权衡解决方案，该方法旨在提高色度计的精度并简化分光光度计的系统。该方法基于对可见光范围内电磁辐射光谱的估计。这是通过对提议的 LED 光源的光谱功率辐射的测量值进行插值来执行的。使用了六个 LED 光源，发射侧的主波长分别为 400 nm、457 nm、517 nm、572 nm、632 nm 和 700 nm。在接收端有一个宽带检测器，负责记录上述波长的光功率。将所提出方法的比色能力与分光光度结果进行了比较，并取得了良好的匹配。通过所提出的印刷样品方法获得的反射光谱与商业分光光度计记录的反射光谱没有显着差异。此外，颜色差异的计算不会偏离容差阈值。