The experiment use a new type CMOS image sensor to detect the intensity of the reflex, which based on whole refractive theory, therefore gain the critical angle from the curve of the intensity. Finally obtain the refractive index and Brix.

• 实验基于全反射折光原理,使用CMOS图像传感器探测出反射光的光强,利用光强曲线确定临界角,从而最终得到含糖溶液的折射率和糖度。