描述了引力透镜的观察现象和产生机理,并从光线的偏折和E inste in环的形成对引力透镜的计算方法进行了阐述,总结了引力透镜的研究意义.
In this paper,both the mechanism and the phenomenon of gravity lensing are described.What is more,the method of calculating gravity lens is also described in detail using reformation of Einstein ring and deflection of light.Finally,the significance of gravity lensing phenomenon is discussed.