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玻璃钢属于光学上非均一物体。当可见光通过玻璃钢时便产生散射现象。由于玻璃纤维的直径(8～10μ)要比可见光的波长(0.4～0.75μ)大好多倍,且相邻二根纤维之间的距离一般都不超过纤维直径的2倍,因此需要用多次散射理论来描述光通过玻璃钢介质时的现象。 根据多次散射理论,一束平行光经过厚度为h的散射层后,其透过部分T(透光率)可以下式表示:
Fiberglass is an optically heterogeneous object. Scattering occurs when visible light passes through the fiberglass. Since the diameter of the glass fiber (8-10 μ) is many times greater than the wavelength of visible light (0.4-0.75 μ), and the distance between two adjacent fibers does not generally exceed 2 times the fiber diameter, multiple times Scattering theory to describe the phenomenon of light through the glass fiber media. According to the theory of multiple scattering, after a bundle of parallel light passes through the scattering layer with thickness h, its transmission part T (light transmittance) can be expressed as follows: