laser light incident on the polycarbonate surface will be refracted at a greater angle into the surface 激光射入聚碳酸脂表面将产生较大的折射角。
tn order to eliminatc the error caused hylight power drift of incident light, we adopt the method of the ration of scattering light to measure the concentration of protein in milk . that is to measure 90 " scattering light intensity and 0 " transmitting light intensity in the light incident plane . the ratio of them is to be used to express measured optical parameter 由于牛乳蛋白质的测量精度要求很高,为了消除因入射光的光功率漂移而引起的误差,我们采用散透比法来测量牛乳蛋白质的含量,即在光的入射平面内同时90处的散射光光强is和测量0处的透射光光强it,用它们的比值来表征测试牛乳蛋白质含量的光学参量。