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1·The coating of a spectacle lens is to coat thin optical coatings with a certain thickness and a number of layers on the lens surface.

眼镜片镀膜，就是在镜片表面镀上具有一定厚度和层数的光学薄膜。

2·We discuss the sources of the measurement uncertainties of standard equipment for spectacle lens (lens) center transmittance and analyze each components of uncertainty.

重点讨论了眼镜片(透镜)中心透射比标准测量装置测量不确定度的来源，详细分析各不确定度分量的评定。