离轴全息记录与再现。复习衍射计算以及光学全息记录与再现原理，学习通过衍射计算完成光学离轴全息记录与再现过程仿真方法，理解第二代光学全息共轭像分离的条件，同时与通州全息作比较，注意观察再现像的特点。-Off-axis holographic recording and playback.Review the diffraction calculation as well as the optical principle of holographic recording and playback, learning through optical diffraction calculation with off-axis holographic recording and playback process simulation method, understand the second generation of optical holographic conjugate like separation conditions, at the same time compare to tongzhou holographic, observe reproduce like characteristics.