Abstract:Based on the illuminance method, a standard device for measuring the coefficient of retroreflection has been established in National Institute of Metrology. The structure and principle of the device are described in detail, and the main factors affecting the level of uncertainty of measurement are analyzed. The final measurement range covers 0.05~1999.00 cd·lx-1·m-2. The measurement uncertainty Urel is 3.0%~8.2%,k=2.
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