Ms. Mengjie Wang Profile

Mengjie Wang

at RIOH Ministry of Transport

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Proceedings Article | 27 March 2022 Paper

Analysis of uncertainty in chromaticity measurement of retroreflective color plate

Mengjie Wang, Xiaokun Han, Yingqi Xue, Wenying Su

Proceedings Volume 12169, 12169AX (2022) https://doi.org/10.1117/12.2626349

KEYWORDS: Retroreflectors, Spectroscopy, Calibration, Light sources, Standards development, Optical testing, Metrology, Color difference, Reflectivity

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Retroreflective color plates are important carriers for transmitting retroreflective chromaticity, and they can be used to calibrate portable retroreflection colorimeters. Measurement errors in the chromaticity measurements of retroreflective color plates create uncertainty of the retroreflective chromaticity coordinates. To study the uncertainty in the measurements of retroreflective chromaticity plates, we analyzed the uncertainty sources and evaluated the uncertainty of the chromaticity coordinates of a retroreflective color plate measured using a remote spectrum measurement system. The results showed that for a confidence probability p = 95% and coverage factor k = 2, the expanded uncertainties of the chromaticity coordinates of the retroreflective color plate, U(x) and U(y), were both 0.01. The evaluation results showed that the uncertainty of the spectrometer contributed to the uncertainty the most, mainly because the large uncertainty components arose from the measurements of the retroreflective color plate and the standard white plate.

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