通过能量守恒推导材料体吸收系数与材料反射率和透射率的关系。
The relation of the volumetric ratio , reflectivity and transmissivity can be deduced by the conservation law of energy.
光学性能：根据需要，中空玻璃的基片可选择不同产品灵活组合，以达到需要的太阳光透射率和反射率。
Optical performance: Various glass substrates can be used for IGU to meet the request of sunlight transmission and reflection.
在可见光区域薄膜透射率和反射率随着基板温度的提高均有所下降。
The transmittance and reflectivity in the visible region of these films lowed with the increasing of the substrate temperature.
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