在入射光通量自被照面或介质入射面至另外一面离开的过程中，投射并透过物体的辐射能与投射到物体上的总辐射能之比，称为该物体的透过率（transmittance ）。
用本发明制备的复合材料质轻、易合成、价格低、环境友好、可见光透过率高。
The composite material produced by the preparation method of the invention has the advantages of light weight, easy synthesis, low price, good environmental protection and high light transmissivity.
应用数学模型分析了温室方位、连栋数、季节及地理纬度对太阳直射光透过率的影响。
Effects of greenhouse orientation, number of spans, time of year and the latitude on the direct solar radiation transmissivity into greenhouses were analyzed using a mathematical model.
设计结果表明，该系统具有透过率高、变倍比大、分辨率高、体积小、像质高等优点。
The design results prove that the zoom system has high optical transmission, large zoom ratio, high resolution, small size and excellent image quality.
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