中文说明：对光学系统中常用的正弦振幅型透射光栅进行了仿真，仿真结果有衍射图案和光强沿x轴方向的曲线。
English Description：
The sinusoidal amplitude type transmission gratings commonly used in optical systems are simulated. The simulation results show the diffraction pattern and the curve of light intensity along the x-axis.