In order to make a color assessment for micron-grade materials such as a single fiber, a non-destructive and push-broom microscopic hyperspectral imaging system (MHIS) was set up consisting of a stereomicroscope, an imaging spectrograph, and a digital detector. The performance of this system for acquiring accurate and repeatable information, such as spectral and colorimetric values, was investigated. The experimental results show that the system has an excellent spatial resolution, repeatability, and accuracy. The spatial resolution with a ×1.5 auxiliary objective lens was down to 90.244 lp mm⁻¹ (5.54 μm). The average ΔE₀₀ of the tested patches in the ColorChecker Mini chart was between 0.15 and 0.40, and the color measurement repeatability was acceptable. Color difference ΔE₀₀ and the standard variation of spectral wavelength between ×2.5 and ×4.5 magnification were larger than those at lower magnifications. It can be concluded that the MHIS can identify colorimetric values of the materials and detect the color changes sensitively with a high spatial resolution at micron-grade.

中文翻译：

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基于显微高光谱成像系统的颜色测量评价

为了对单纤维等微米级材料进行颜色评估，建立了由立体显微镜、成像光谱仪和数字探测器组成的无损推扫式显微高光谱成像系统（MHIS）。研究了该系统在获取准确且可重复的信息（例如光谱和色度值）方面的性能。实验结果表明，该系统具有良好的空间分辨率、重复性和精度。×1.5 辅助物镜的空间分辨率降至 90.244 lp mm ^-1 (5.54 μm)。平均 Δ E ₀₀ColorChecker Mini 图表中测试色块的 0.15 到 0.40 之间，颜色测量的重复性是可以接受的。色差Δ E ₀₀和光谱波长在×2.5 和×4.5 放大倍数之间的标准变化比在较低放大倍数下大。可以得出结论，MHIS可以识别材料的色度值，并以微米级的高空间分辨率灵敏地检测颜色变化。