本文提出了一种基于手机相机和最小偏向角光学原理的测量透明溶液浓度的实验设计. 激光入射到盛有不同浓度溶液的空心三棱镜产生不同的折射角，采用手机相机观察和采集出射光落在接收屏上的二维光斑图像，并实时传送给计算机，再对图像进行处理及线性拟合，得到溶液浓度与角度的变化关系，最终可实现对透明液体浓度的测量. 该设计测量速度快，测量结果准确，实验现象直观且趣味性强，适合在普通物理光学实验课程中推广应用.

 An experimental design for the measurement of transparent solution concentration based a mobile phone camera and the principle of optical minimum deviation angle is proposed in this paper. When a laser beam passes through a hollow triple prism with different concentration solution, the outgoing light will has different angle of refraction. The outgoing light image is observed and gathered, and then transmitted to computer. The functional relationship between the liquid concentration and the angle is obtained by using the image processing technique and linear fitting. Finally, the transparent liquid concentration is successfully achieved. This design shows several merits, such as good measuring speed, accurate results, obvious phenomenon and very interesting, which is suitable for application in common physics optical experiment.