Block resistance, also known as film resistance, is a measurement value used to indirectly characterize the thermal infrared performance of vacuum coatings on samples such as thin film and glass coating layers. The magnitude of this value can be directly converted into thermal infrared emissivity. The size of the block resistance is independent of the sample size, and its unit is Dimensions/sq. After adding the Ohm/sq characterization method, this unit is directly translated as block resistance or surface resistance, which is also known as film resistance for film measurement
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